EP2203384A1 - Entfernung von fremdmetallen aus anorganischen silanen - Google Patents
Entfernung von fremdmetallen aus anorganischen silanenInfo
- Publication number
- EP2203384A1 EP2203384A1 EP08803098A EP08803098A EP2203384A1 EP 2203384 A1 EP2203384 A1 EP 2203384A1 EP 08803098 A EP08803098 A EP 08803098A EP 08803098 A EP08803098 A EP 08803098A EP 2203384 A1 EP2203384 A1 EP 2203384A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- foreign metal
- content
- containing compound
- metal
- inorganic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 100
- 239000002184 metal Substances 0.000 title claims abstract description 100
- 150000004756 silanes Chemical class 0.000 title claims abstract description 34
- 150000002739 metals Chemical class 0.000 title abstract description 15
- 150000001875 compounds Chemical class 0.000 claims abstract description 57
- 239000000203 mixture Substances 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 40
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 7
- 239000010457 zeolite Substances 0.000 claims abstract description 7
- 150000004760 silicates Chemical class 0.000 claims abstract description 4
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 31
- 229910000077 silane Inorganic materials 0.000 claims description 30
- 239000003463 adsorbent Substances 0.000 claims description 23
- 125000003118 aryl group Chemical group 0.000 claims description 14
- 125000004432 carbon atom Chemical group C* 0.000 claims description 13
- 125000006165 cyclic alkyl group Chemical group 0.000 claims description 13
- 239000000460 chlorine Substances 0.000 claims description 12
- -1 radicals metal hydrides Chemical class 0.000 claims description 12
- 229910052801 chlorine Inorganic materials 0.000 claims description 10
- 229910052736 halogen Inorganic materials 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 150000002367 halogens Chemical class 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000009835 boiling Methods 0.000 claims description 8
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 claims description 6
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 claims description 6
- 239000005052 trichlorosilane Substances 0.000 claims description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 5
- 229910052796 boron Inorganic materials 0.000 claims description 5
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 230000002209 hydrophobic effect Effects 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910001507 metal halide Inorganic materials 0.000 claims description 4
- 150000005309 metal halides Chemical group 0.000 claims description 4
- 229910052987 metal hydride Inorganic materials 0.000 claims description 4
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- KOPOQZFJUQMUML-UHFFFAOYSA-N chlorosilane Chemical compound Cl[SiH3] KOPOQZFJUQMUML-UHFFFAOYSA-N 0.000 claims description 3
- MROCJMGDEKINLD-UHFFFAOYSA-N dichlorosilane Chemical compound Cl[SiH2]Cl MROCJMGDEKINLD-UHFFFAOYSA-N 0.000 claims description 3
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 150000004681 metal hydrides Chemical group 0.000 claims description 3
- JLUFWMXJHAVVNN-UHFFFAOYSA-N methyltrichlorosilane Chemical compound C[Si](Cl)(Cl)Cl JLUFWMXJHAVVNN-UHFFFAOYSA-N 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 239000005051 trimethylchlorosilane Substances 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 229910021536 Zeolite Inorganic materials 0.000 claims description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 2
- 239000005055 methyl trichlorosilane Substances 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims 1
- 239000000539 dimer Substances 0.000 claims 1
- 239000000178 monomer Substances 0.000 claims 1
- 229920000642 polymer Polymers 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 5
- 229910052794 bromium Inorganic materials 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 3
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000499 gel Substances 0.000 description 3
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 229920001429 chelating resin Polymers 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 2
- GNEPOXWQWFSSOU-UHFFFAOYSA-N dichloro-methyl-phenylsilane Chemical compound C[Si](Cl)(Cl)C1=CC=CC=C1 GNEPOXWQWFSSOU-UHFFFAOYSA-N 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 239000005054 phenyltrichlorosilane Substances 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 150000003377 silicon compounds Chemical class 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- GQIUQDDJKHLHTB-UHFFFAOYSA-N trichloro(ethenyl)silane Chemical compound Cl[Si](Cl)(Cl)C=C GQIUQDDJKHLHTB-UHFFFAOYSA-N 0.000 description 2
- ORVMIVQULIKXCP-UHFFFAOYSA-N trichloro(phenyl)silane Chemical compound Cl[Si](Cl)(Cl)C1=CC=CC=C1 ORVMIVQULIKXCP-UHFFFAOYSA-N 0.000 description 2
- 239000005050 vinyl trichlorosilane Substances 0.000 description 2
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 1
- 229910002012 Aerosil® Inorganic materials 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 229910003691 SiBr Inorganic materials 0.000 description 1
- 229910003902 SiCl 4 Inorganic materials 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 1
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- LUXIMSHPDKSEDK-UHFFFAOYSA-N bis(disilanyl)silane Chemical compound [SiH3][SiH2][SiH2][SiH2][SiH3] LUXIMSHPDKSEDK-UHFFFAOYSA-N 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 description 1
- UBHZUDXTHNMNLD-UHFFFAOYSA-N dimethylsilane Chemical compound C[SiH2]C UBHZUDXTHNMNLD-UHFFFAOYSA-N 0.000 description 1
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000407 epitaxy Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- UIUXUFNYAYAMOE-UHFFFAOYSA-N methylsilane Chemical compound [SiH3]C UIUXUFNYAYAMOE-UHFFFAOYSA-N 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 229920000548 poly(silane) polymer Polymers 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000005049 silicon tetrachloride Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- CZDYPVPMEAXLPK-UHFFFAOYSA-N tetramethylsilane Chemical compound C[Si](C)(C)C CZDYPVPMEAXLPK-UHFFFAOYSA-N 0.000 description 1
- LXEXBJXDGVGRAR-UHFFFAOYSA-N trichloro(trichlorosilyl)silane Chemical compound Cl[Si](Cl)(Cl)[Si](Cl)(Cl)Cl LXEXBJXDGVGRAR-UHFFFAOYSA-N 0.000 description 1
- PZKOFHKJGUNVTM-UHFFFAOYSA-N trichloro-[dichloro(trichlorosilyl)silyl]silane Chemical compound Cl[Si](Cl)(Cl)[Si](Cl)(Cl)[Si](Cl)(Cl)Cl PZKOFHKJGUNVTM-UHFFFAOYSA-N 0.000 description 1
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 1
- PQDJYEQOELDLCP-UHFFFAOYSA-N trimethylsilane Chemical compound C[SiH](C)C PQDJYEQOELDLCP-UHFFFAOYSA-N 0.000 description 1
- VEDJZFSRVVQBIL-UHFFFAOYSA-N trisilane Chemical compound [SiH3][SiH2][SiH3] VEDJZFSRVVQBIL-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/04—Hydrides of silicon
- C01B33/046—Purification
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/08—Compounds containing halogen
- C01B33/107—Halogenated silanes
- C01B33/10778—Purification
- C01B33/10784—Purification by adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
Definitions
- the invention relates to a process for the treatment of a composition containing inorganic silanes and at least one foreign metal and / or a foreign metal-containing compound, wherein the composition is brought into contact with at least one adsorbent and recovering the composition in which the content of foreign metal and / or the foreign metal-containing compound is reduced and a corresponding composition having a reduced foreign metal content, as well as the use of organic resins, activated carbons, silicates and / or zeolites for reducing foreign metals and / or foreign metal-containing compounds in compositions of inorganic silanes.
- Silicon compounds used in microelectronics such as for the production of high purity silicon by epitaxy or
- SiOC silicon carbide
- SiC silicon carbide
- SiCl 4 silicon tetrachloride
- SiCI 4 is required in very high purity.
- Metallic impurities in halosilanes negatively affect the attenuation behavior of optical fibers by increasing the attenuation values and thus reducing signal transmission.
- high-purity HSiCb is an important feedstock in the production of solar silicon.
- halogen silanes and / or hydrohalosilanes of high purity in the field of electronics, the semiconductor industry as well as in the pharmaceutical industry wished starting compounds.
- the impurities present in silicon are usually also chlorinated and partially entrained in the subsequent synthesis steps.
- these chlorinated metallic impurities have a disadvantageous effect in the production of components in the field of electronics.
- the process should be inexpensive and easy to handle.
- Another object was to provide inorganic silanes with the lowest foreign metal content and / or lowest content of foreign metal-containing compounds.
- the invention therefore relates to a process for the treatment of a composition comprising inorganic silanes and at least one foreign metal and / or a foreign metal-containing compound, wherein the composition is brought into contact with at least one adsorbent, in particular a dry adsorbent and a composition is obtained, their content of foreign metal and / or at least one foreign metal-containing compound is reduced.
- the foreign metal content and / or the content of the foreign metal-containing compound, - is usually a residual content of foreign metal or foreign metal-containing compound which can be poorly distilled or not further separate - especially independently each can be reduced to a content in the range of below 100 ug / kg, in particular below 25 ug / kg, preferably below 15 ug / kg, more preferably below 10 ug / kg.
- the determination of the foreign metals or of the foreign metal-containing compounds can generally be carried out by quantitative analysis methods, as known to those skilled in the art, for example by atomic absorption spectroscopy (AAS) or photometry, in particular by inductively coupled plasma mass spectrometry (ICP-MS ) and Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) - to name but a few.
- AAS atomic absorption spectroscopy
- ICP-MS inductively coupled plasma mass spectrometry
- ICP-OES Inductively Coupled Plasma Optical Emission Spectrometry
- Inorganic silanes are, in particular, halosilanes, hydrogen halosilanes, halosilanes which are substituted by at least one organic radical and / or which are hydrogen halosilanes which are substituted by at least one organic radical, and also mixtures of these silanes. According to one
- Embodiment may also be included pure hydrogen silanes.
- each halogen can be selected independently of other halogen atoms from the group fluorine, chlorine, bromine or iodine, see above that, for example, mixed halosilanes such as SiBrCl 2 F or SiBr 2 CIF may be included.
- the inorganic silanes preferably include the chlorine-substituted, predominantly monomeric silanes, such as, for example, tetrachlorosilane, trichlorosilane, dichlorosilane, monochlorosilane, methylthchlorosilane, thymethylsilane, trimethylchlorosilane, dimethyldichlorosilane, phenylmethyldichlorosilane, phenyltrichlorosilane, vinyltrichlorosilane, dihydrogendichlorosilane.
- monomeric silanes such as, for example, tetrachlorosilane, trichlorosilane, dichlorosilane, monochlorosilane, methylthchlorosilane, thymethylsilane, trimethylchlorosilane, dimethyldichlorosilane, phenylmethyldichlorosilane, phenyltrichlor
- the monomeric silanes such as tetramethylsilane, trimethylsilane, dimethylsilane, methylsilane, monosilane or organohydrosilanes or disilane, trisilane, tetrasilane and / or pentasilane and higher homologous silanes can be reduced according to the inventive method in their foreign metal content.
- monomeric silanes such as tetramethylsilane, trimethylsilane, dimethylsilane, methylsilane, monosilane or organohydrosilanes or disilane, trisilane, tetrasilane and / or pentasilane and higher homologous silanes
- monomeric silanes such as tetramethylsilane, trimethylsilane, dimethylsilane, methylsilane, monosilane or organohydrosilanes or disilane, trisilane, tetrasilane and / or pentasilane
- Pentachlorhydrogendisilan or Tetrachlordihydrogendisilan and mixtures thereof with monomeric, linear, branched and / or cyclic oligomeric and / or polymeric inorganic silanes are reduced accordingly in their foreign metal content.
- the cyclic oligomeric compounds include compounds of the type Si n X 2n , with n> 3, such as Si 5 Cli 0 , and to the polymeric inorganic compounds, for example, halopolysilanes, ie polysilicon halides Si n X 2n +2 with n> 5 and / or polysilicon hydrogen halides Si n H a X [( 2n + 2) -a] where n> 2 and 0 ⁇ a ⁇ (2n + 2), where each X is a halogen, such as F, Cl, Br, J, especially Cl ,
- foreign metals and / or foreign metal-containing compounds are considered those in which the metal does not correspond to silicon.
- the adsorption of the at least one foreign metal and / or foreign metal-containing compound is carried out in particular selectively from the inorganic silane-containing composition, while the adsorption both in solution and in the Gas phase take place.
- foreign metals or foreign metal-containing compounds are also understood half metals or compounds containing semimetals, such as boron and boron trichloride.
- the foreign metals and / or foreign metal-containing compounds to be reduced are metal halides, metal hydrogen halides and / or metal hydrides and mixtures of these compounds.
- organic radicals such as alkyl or aryl groups
- functionalized metal halides, metal hydrogen halides or metal hydrides can be removed with very good results from inorganic silanes. Examples include aluminum trichloride or iron (III) -chlohd as well as entrained particulate metals, which can come from continuous processes.
- the contents of boron, aluminum, potassium, lithium, sodium, magnesium, calcium and / or iron can be reduced, in particular, compounds based on these metals are separated off.
- the inventive method is particularly suitable for the separation or reduction of foreign metal-containing compounds whose boiling point is in the range of the boiling point of an inorganic silane or would go with this as an azeotrope. These foreign metal-containing compounds can sometimes be difficult to remove by distillation or not at all.
- a boiling point which is in the range of the boiling point of an inorganic silane compound, a boiling point is considered, which is in the range of ⁇ 20 0 C of the boiling point of one of the inorganic silanes at atmospheric pressure (about 1013.25 hPa or 1013.25 mbar).
- the foreign metal and / or the foreign metal-containing compound can be reduced by 50 to 99 wt .-%.
- the foreign metal content by 70 to 99 wt .-%, particularly preferably reduced by 85 to 99 wt .-%.
- the process allows a reduction of the residual content by 95 to 99% by weight.
- the aluminum content of a composition of inorganic silanes by 50 to 99 wt .-%, preferably 85 to 99 wt .-% and the boron content by at least 70 wt .-%, preferably by 95 to 99.5 wt .-% be reduced.
- the foreign metal content and / or the content of the foreign metal-containing compound in a composition may preferably be in relation to the metallic compound, in particular independently, each to a content in the range of below 100 ug / kg, in particular below 25 ug / kg, preferably below 15 ⁇ g / kg, more preferably 0.1 to 10 ⁇ g / kg are reduced to the respective detection limit.
- Both inorganic and organic adsorbents may be used to carry out the process.
- adsorbents which may also be hydrophilic and / or hydrophobic, may be used to carry out the process.
- a mixture of hydrophilic and hydrophobic adsorbents or an adsorbent having both functions is used.
- Selected may be the adsorbents from the group of organic resins, activated carbons, silicates, especially from silica gels or silica gels, and / or zeolites.
- Preferred adsorbents are Amberlite TM XAD-4 resin from Röhm Haas, activated carbon, in particular Norit activated carbon, Montmohllonite, in particular montmorillonite K 10, zeolites, such as Wessalith F 20, as well as silica gels, such as fumed silica or precipitated silica, in particular Silica Gel Grace Type 432 (extruded at 550 0 C) or Aerosil ® 200th
- the treatment according to the invention of compositions containing inorganic silanes is carried out in such a way that first the Adsorbent is dried carefully to prevent hydrolysis of the silanes to be purified. Subsequently, the dried adsorbent is brought under protective gas atmosphere with the composition in contact, optionally stirred. Suitably, the treatment is carried out at room temperature and atmospheric pressure for several hours. Typically, the composition is contacted with the adsorbent for between 1 minute to 10 hours, typically up to 5 hours. The recovery or separation of the purified composition is usually carried out by filtration, centrifugation or sedimentation. The process can be carried out batchwise or continuously as needed.
- the obtained inorganic silane-based composition has a reduced foreign metal content and / or foreign metal-containing compound content by 50 to 99% by weight.
- the invention likewise provides a process for the treatment of a composition comprising inorganic silanes and at least one foreign metal and / or a foreign metal-containing compound, according to the process described above, wherein at least one inorganic silane corresponds to the general formula I,
- Cl such as tetrachlorosilane, trichlorosilane, trichloromethylsilane, trimethylchlorosilane, dimethyldichlorosilane, phenylmethyldichlorosilane, phenyltrichlorosilane, vinyltrichlorosilane, dihydrodichlorosilane,
- the method is also suitable for the treatment of compositions containing compounds of the type of general formula I,
- the foreign metal content and / or the content of the foreign metal-containing compound of this composition may preferably be in respect of the metallic compound, in particular independently of each other, each in a content in the Range of less than 100 ⁇ g / kg, in particular of less than 25 ⁇ g / kg, preferably less than 15 ⁇ g / kg, particularly preferably less than 10 ⁇ g / kg.
- the invention relates to a composition
- a composition comprising at least one inorganic silane of the general formula I,
- the invention also provides the use of an organic resin, activated carbon, a silicate, in particular a silica gel, and / or a zeolite for reducing the content of at least one foreign metal and / or at least a foreign metal-containing compound of compositions containing inorganic silanes of the general formula I,
- the adsorbents are carefully dried prior to use in the process to prevent hydrolysis of the silanes to be purified.
- a defined amount of adsorbent is placed in a 500 ml stirring apparatus comprising a glass four-necked flask with condenser (water, dry ice), dropping funnel, Stirrer, thermometer and nitrogen, presented and dried under vacuum ( ⁇ 1 mbar) and about 170 0 C for 5 hours, then slowly aerated with dry nitrogen and cooled. Subsequently, 250 ml of the silane to be purified are added via the dropping funnel. Over a period of 5 hours, the adsorption process is carried out under normal pressure at room temperature under a protective gas atmosphere. The adsorbent is separated from the silane by passing it through a frit (Por. 4) into an evacuated 500 ml glass flask with a discharge device. Subsequently, the glass flask is aerated with nitrogen and drained into a nitrogen-purged Schott glass bottle.
- Example 1.4 The following example was carried out according to the general procedure with the amounts given here.
- Wessalith F 20 20.17 g of Wessalith F 20 were pretreated as described in the general procedure under Example 1.2, and 250 ml of trichlorosilane were added. The metal contents before and after treatment were determined by ICP-MS.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Silicon Compounds (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007050199A DE102007050199A1 (de) | 2007-10-20 | 2007-10-20 | Entfernung von Fremdmetallen aus anorganischen Silanen |
| PCT/EP2008/060863 WO2009049944A1 (de) | 2007-10-20 | 2008-08-20 | Entfernung von fremdmetallen aus anorganischen silanen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2203384A1 true EP2203384A1 (de) | 2010-07-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08803098A Ceased EP2203384A1 (de) | 2007-10-20 | 2008-08-20 | Entfernung von fremdmetallen aus anorganischen silanen |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20100266489A1 (de) |
| EP (1) | EP2203384A1 (de) |
| JP (1) | JP2011500489A (de) |
| KR (1) | KR20100087106A (de) |
| CN (1) | CN101412513A (de) |
| BR (1) | BRPI0817668A2 (de) |
| CA (1) | CA2701771A1 (de) |
| DE (1) | DE102007050199A1 (de) |
| RU (1) | RU2010119943A (de) |
| WO (1) | WO2009049944A1 (de) |
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2007
- 2007-10-20 DE DE102007050199A patent/DE102007050199A1/de not_active Withdrawn
-
2008
- 2008-08-20 RU RU2010119943/05A patent/RU2010119943A/ru unknown
- 2008-08-20 KR KR1020107008471A patent/KR20100087106A/ko not_active Ceased
- 2008-08-20 US US12/738,246 patent/US20100266489A1/en not_active Abandoned
- 2008-08-20 EP EP08803098A patent/EP2203384A1/de not_active Ceased
- 2008-08-20 WO PCT/EP2008/060863 patent/WO2009049944A1/de not_active Ceased
- 2008-08-20 JP JP2010529312A patent/JP2011500489A/ja not_active Withdrawn
- 2008-08-20 BR BRPI0817668 patent/BRPI0817668A2/pt not_active IP Right Cessation
- 2008-08-20 CA CA2701771A patent/CA2701771A1/en not_active Abandoned
- 2008-10-17 CN CNA2008101714446A patent/CN101412513A/zh active Pending
Non-Patent Citations (1)
| Title |
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| See references of WO2009049944A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011500489A (ja) | 2011-01-06 |
| BRPI0817668A2 (pt) | 2015-03-31 |
| RU2010119943A (ru) | 2011-11-27 |
| WO2009049944A1 (de) | 2009-04-23 |
| DE102007050199A1 (de) | 2009-04-23 |
| CA2701771A1 (en) | 2009-04-23 |
| KR20100087106A (ko) | 2010-08-03 |
| US20100266489A1 (en) | 2010-10-21 |
| CN101412513A (zh) | 2009-04-22 |
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