NL8006571A - Werkwijze voor het winnen van een uraniumbevattend concentraat en fosforzuur, alsmede uraniumbevattend concentraat en fosforzuur verkregen volgens deze werkwijze. - Google Patents

Werkwijze voor het winnen van een uraniumbevattend concentraat en fosforzuur, alsmede uraniumbevattend concentraat en fosforzuur verkregen volgens deze werkwijze. Download PDF

Info

Publication number: NL8006571A
Authority: NL; Netherlands
Prior art keywords: phosphoric acid; uranium; solution; water; vessel
Prior art date: 1980-12-03

Application number

NL8006571A

Other languages

English (en)

Dutch (nl)

Original Assignee

Stamicarbon

Priority date (The priority date 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 date listed.)

1980-12-03

Filing date

1980-12-03

Publication date

1982-07-01

1980-12-03 Application filed by Stamicarbon filed Critical Stamicarbon

1980-12-03 Priority to NL8006571A priority Critical patent/NL8006571A/nl

1981-10-30 Priority to EP81201220A priority patent/EP0053409A1/fr

1981-12-01 Priority to MA19548A priority patent/MA19344A1/fr

1981-12-01 Priority to IL64437A priority patent/IL64437A/xx

1981-12-01 Priority to CA000391306A priority patent/CA1184388A/fr

1981-12-02 Priority to ES507639A priority patent/ES507639A0/es

1981-12-02 Priority to ZA818362A priority patent/ZA818362B/xx

1981-12-02 Priority to JP56194330A priority patent/JPS57118032A/ja

1982-07-01 Publication of NL8006571A publication Critical patent/NL8006571A/nl

Links

NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title claims description 99
229910000147 aluminium phosphate Inorganic materials 0.000 title claims description 49
238000000034 method Methods 0.000 title claims description 28
VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 33
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 20
QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 19
229910052770 Uranium Inorganic materials 0.000 claims description 18
JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 claims description 18
239000000377 silicon dioxide Substances 0.000 claims description 17
239000007789 gas Substances 0.000 claims description 16
238000001556 precipitation Methods 0.000 claims description 16
239000012141 concentrate Substances 0.000 claims description 12
DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 claims description 11
235000012239 silicon dioxide Nutrition 0.000 claims description 11
YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 10
QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
230000029087 digestion Effects 0.000 claims description 10
239000011737 fluorine Substances 0.000 claims description 10
229910052731 fluorine Inorganic materials 0.000 claims description 10
239000000203 mixture Substances 0.000 claims description 10
229910021529 ammonia Inorganic materials 0.000 claims description 8
239000002367 phosphate rock Substances 0.000 claims description 8
XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
239000002270 dispersing agent Substances 0.000 claims description 7
239000002244 precipitate Substances 0.000 claims description 7
229910052710 silicon Inorganic materials 0.000 claims description 7
239000010703 silicon Substances 0.000 claims description 7
238000001704 evaporation Methods 0.000 claims description 5
230000008020 evaporation Effects 0.000 claims description 5
239000007788 liquid Substances 0.000 claims description 4
229910052739 hydrogen Inorganic materials 0.000 claims description 3
239000001257 hydrogen Substances 0.000 claims 2
-1 hydrogen hexafluorosilicate Chemical class 0.000 claims 2
238000011084 recovery Methods 0.000 claims 1
235000011007 phosphoric acid Nutrition 0.000 description 40
238000006243 chemical reaction Methods 0.000 description 13
CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 10
229910019142 PO4 Inorganic materials 0.000 description 9
235000011132 calcium sulphate Nutrition 0.000 description 9
235000021317 phosphate Nutrition 0.000 description 9
238000002156 mixing Methods 0.000 description 8
239000006096 absorbing agent Substances 0.000 description 7
NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 7
239000010452 phosphate Substances 0.000 description 7
229910004014 SiF4 Inorganic materials 0.000 description 6
239000001175 calcium sulphate Substances 0.000 description 6
ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 6
239000012295 chemical reaction liquid Substances 0.000 description 5
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
239000007787 solid Substances 0.000 description 4
OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
238000010521 absorption reaction Methods 0.000 description 3
238000004821 distillation Methods 0.000 description 3
238000001914 filtration Methods 0.000 description 3
229910052751 metal Inorganic materials 0.000 description 3
239000002184 metal Substances 0.000 description 3
238000002360 preparation method Methods 0.000 description 3
QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
238000005119 centrifugation Methods 0.000 description 2
239000003638 chemical reducing agent Substances 0.000 description 2
239000003795 chemical substances by application Substances 0.000 description 2
229910052747 lanthanoid Inorganic materials 0.000 description 2
150000002602 lanthanoids Chemical class 0.000 description 2
150000002736 metal compounds Chemical class 0.000 description 2
239000011541 reaction mixture Substances 0.000 description 2
238000000926 separation method Methods 0.000 description 2
235000011149 sulphuric acid Nutrition 0.000 description 2
239000002912 waste gas Substances 0.000 description 2
229910052727 yttrium Inorganic materials 0.000 description 2
VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 2
CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
235000008733 Citrus aurantifolia Nutrition 0.000 description 1
LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
229910003638 H2SiF6 Inorganic materials 0.000 description 1
229910017855 NH 4 F Inorganic materials 0.000 description 1
OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
229910004298 SiO 2 Inorganic materials 0.000 description 1
235000011941 Tilia x europaea Nutrition 0.000 description 1
HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
VYOZKLLJJHRFNA-UHFFFAOYSA-N [F].N Chemical compound [F].N VYOZKLLJJHRFNA-UHFFFAOYSA-N 0.000 description 1
239000002253 acid Substances 0.000 description 1
229910052782 aluminium Inorganic materials 0.000 description 1
XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
229910000148 ammonium phosphate Inorganic materials 0.000 description 1
ZRIUUUJAJJNDSS-UHFFFAOYSA-N ammonium phosphates Chemical compound [NH4+].[NH4+].[NH4+].[O-]P([O-])([O-])=O ZRIUUUJAJJNDSS-UHFFFAOYSA-N 0.000 description 1
159000000009 barium salts Chemical class 0.000 description 1
239000006227 byproduct Substances 0.000 description 1
229910052681 coesite Inorganic materials 0.000 description 1
150000001875 compounds Chemical class 0.000 description 1
229910052906 cristobalite Inorganic materials 0.000 description 1
239000013078 crystal Substances 0.000 description 1
235000011950 custard Nutrition 0.000 description 1
150000004683 dihydrates Chemical class 0.000 description 1
RXKJFZQQPQGTFL-UHFFFAOYSA-N dihydroxyacetone Chemical compound OCC(=O)CO RXKJFZQQPQGTFL-UHFFFAOYSA-N 0.000 description 1
238000007865 diluting Methods 0.000 description 1
LRCFXGAMWKDGLA-UHFFFAOYSA-N dioxosilane;hydrate Chemical compound O.O=[Si]=O LRCFXGAMWKDGLA-UHFFFAOYSA-N 0.000 description 1
238000001035 drying Methods 0.000 description 1
239000000428 dust Substances 0.000 description 1
229920001971 elastomer Polymers 0.000 description 1
238000000605 extraction Methods 0.000 description 1
239000003337 fertilizer Substances 0.000 description 1
239000000945 filler Substances 0.000 description 1
238000000227 grinding Methods 0.000 description 1
235000015243 ice cream Nutrition 0.000 description 1
239000012535 impurity Substances 0.000 description 1
238000011065 in-situ storage Methods 0.000 description 1
229910052742 iron Inorganic materials 0.000 description 1
239000004571 lime Substances 0.000 description 1
150000002739 metals Chemical class 0.000 description 1
239000003595 mist Substances 0.000 description 1
230000004048 modification Effects 0.000 description 1
238000012986 modification Methods 0.000 description 1
239000003973 paint Substances 0.000 description 1
150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
ZPLUZNXSYCCJOE-UHFFFAOYSA-N phosphoric acid;propan-2-one Chemical compound CC(C)=O.OP(O)(O)=O ZPLUZNXSYCCJOE-UHFFFAOYSA-N 0.000 description 1
YXJYBPXSEKMEEJ-UHFFFAOYSA-N phosphoric acid;sulfuric acid Chemical compound OP(O)(O)=O.OS(O)(=O)=O YXJYBPXSEKMEEJ-UHFFFAOYSA-N 0.000 description 1
229910052698 phosphorus Inorganic materials 0.000 description 1
239000011574 phosphorus Substances 0.000 description 1
239000004033 plastic Substances 0.000 description 1
229920003023 plastic Polymers 0.000 description 1
230000001376 precipitating effect Effects 0.000 description 1
239000000047 product Substances 0.000 description 1
239000002994 raw material Substances 0.000 description 1
239000005060 rubber Substances 0.000 description 1
239000013049 sediment Substances 0.000 description 1
239000002002 slurry Substances 0.000 description 1
229910052682 stishovite Inorganic materials 0.000 description 1
ZEFWRWWINDLIIV-UHFFFAOYSA-N tetrafluorosilane;dihydrofluoride Chemical compound F.F.F[Si](F)(F)F ZEFWRWWINDLIIV-UHFFFAOYSA-N 0.000 description 1
229910052905 tridymite Inorganic materials 0.000 description 1
JCMLRUNDSXARRW-UHFFFAOYSA-N trioxouranium Chemical compound O=[U](=O)=O JCMLRUNDSXARRW-UHFFFAOYSA-N 0.000 description 1
229910052720 vanadium Inorganic materials 0.000 description 1
GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
238000005406 washing Methods 0.000 description 1
229910052725 zinc Inorganic materials 0.000 description 1
239000011701 zinc Substances 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B60/00—Obtaining metals of atomic number 87 or higher, i.e. radioactive metals
- C22B60/02—Obtaining thorium, uranium, or other actinides
- C22B60/0204—Obtaining thorium, uranium, or other actinides obtaining uranium
- C22B60/0217—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes
- C22B60/0252—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes treatment or purification of solutions or of liquors or of slurries
- C22B60/0278—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes treatment or purification of solutions or of liquors or of slurries by chemical methods
- C22B60/0282—Solutions containing P ions, e.g. treatment of solutions resulting from the leaching of phosphate ores or recovery of uranium from wet-process phosphoric acid
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/46—Preparation involving solvent-solvent extraction
- C01B25/461—Preparation involving solvent-solvent extraction the phosphoric acid present in the medium obtained after reaction being first extracted from the liquid phase formed or separated then re-extracted as free acid by using water or as a phosphate by using a basic compound
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/46—Preparation involving solvent-solvent extraction
- C01B25/461—Preparation involving solvent-solvent extraction the phosphoric acid present in the medium obtained after reaction being first extracted from the liquid phase formed or separated then re-extracted as free acid by using water or as a phosphate by using a basic compound
- C01B25/463—Preparation involving solvent-solvent extraction the phosphoric acid present in the medium obtained after reaction being first extracted from the liquid phase formed or separated then re-extracted as free acid by using water or as a phosphate by using a basic compound the extracting agent being a ketone or a mixture of ketones

Landscapes

Chemical & Material Sciences (AREA)
Organic Chemistry (AREA)
Chemical Kinetics & Catalysis (AREA)
Life Sciences & Earth Sciences (AREA)
General Life Sciences & Earth Sciences (AREA)
Analytical Chemistry (AREA)
Inorganic Chemistry (AREA)
Engineering & Computer Science (AREA)
Environmental & Geological Engineering (AREA)
Geology (AREA)
General Chemical & Material Sciences (AREA)
Manufacturing & Machinery (AREA)
Materials Engineering (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Removal Of Specific Substances (AREA)
Inorganic Compounds Of Heavy Metals (AREA)

NL8006571A 1980-12-03 1980-12-03 Werkwijze voor het winnen van een uraniumbevattend concentraat en fosforzuur, alsmede uraniumbevattend concentraat en fosforzuur verkregen volgens deze werkwijze. NL8006571A (nl)

Priority Applications (8)

Application Number	Priority Date	Filing Date	Title
NL8006571A NL8006571A (nl)	1980-12-03	1980-12-03	Werkwijze voor het winnen van een uraniumbevattend concentraat en fosforzuur, alsmede uraniumbevattend concentraat en fosforzuur verkregen volgens deze werkwijze.
EP81201220A EP0053409A1 (fr)	1980-12-03	1981-10-30	Procédé de récupération d'un concentrat d'uranium et d'acide phosphorique
MA19548A MA19344A1 (fr)	1980-12-03	1981-12-01	Procede d'obtention d'un concentrat contenant de l'uranium et d'acide phosphorique , ainsi que du concentrat , contenant de l'uranium et de l'acide phosphorique , obtenu par la misen oeuvre de ce procede .
IL64437A IL64437A (en)	1980-12-03	1981-12-01	Recovery of uranium-containing concentrate and phosphoric acid from phosphate rock
CA000391306A CA1184388A (fr)	1980-12-03	1981-12-01	Methode de separation d'un concentre a teneur d'uranium et d'acide phosphorique, et concentre et acide ainsi obtenus
ES507639A ES507639A0 (es)	1980-12-03	1981-12-02	Procedimiento para la recuperacion de un concentrado que contiene uranio,y acido fosforico .
ZA818362A ZA818362B (en)	1980-12-03	1981-12-02	Process for the recovery of a uranium-containing concentrate and phosphoric acid,and uranium-containing concentrate and phosphoric acid obtained by this process
JP56194330A JPS57118032A (en)	1980-12-03	1981-12-02	Recovery of uranium-containing condensate and phosphoric acid and uranium-containing condensate and phosphoric acid recovered thereby

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
NL8006571		1980-12-03
NL8006571A NL8006571A (nl)	1980-12-03	1980-12-03	Werkwijze voor het winnen van een uraniumbevattend concentraat en fosforzuur, alsmede uraniumbevattend concentraat en fosforzuur verkregen volgens deze werkwijze.

Publications (1)

Publication Number	Publication Date
NL8006571A true NL8006571A (nl)	1982-07-01

Family

ID=19836277

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL8006571A NL8006571A (nl)	1980-12-03	1980-12-03	Werkwijze voor het winnen van een uraniumbevattend concentraat en fosforzuur, alsmede uraniumbevattend concentraat en fosforzuur verkregen volgens deze werkwijze.

Country Status (8)

Country	Link
EP (1)	EP0053409A1 (fr)
JP (1)	JPS57118032A (fr)
CA (1)	CA1184388A (fr)
ES (1)	ES507639A0 (fr)
IL (1)	IL64437A (fr)
MA (1)	MA19344A1 (fr)
NL (1)	NL8006571A (fr)
ZA (1)	ZA818362B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2531698A2 (fr) *	1981-11-17	1984-02-17	Pechiney Ugine Kuhlmann Uran	Traitement de purification d'un concentre uranifere
CN104906920B (zh) *	2015-06-03	2017-01-18	贵阳开磷化肥有限公司	一种湿法磷酸尾气处理回收氟、硅资源的系统及其回收方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2819145A (en) *	1952-10-15	1958-01-07	Robert F Mccullough	Metal value recovery from leached zone material
BE755133A (fr) *	1969-08-23	1971-02-22	Bayer Ag	Procede pour separer le phosphate d'un acide fluosilicique approprie a la fabrication du fluorure d'ammonium
DE2347485C3 (de) *	1973-09-21	1980-09-04	Bayer Ag, 5090 Leverkusen	Verfahren zur Herstellung von Ammoniumfluorid aus Kieselfluorwasserstoffsäure
EP0015589B1 (fr) *	1979-01-25	1983-11-30	Stamicarbon B.V.	Procédé de récupération d'un concentrat contenant de l'uranium et d'acide phosphorique purifié à partir d'acide phosphorique obtenu par voie humide et produits ainsi obtenus

1980
- 1980-12-03 NL NL8006571A patent/NL8006571A/nl not_active Application Discontinuation
1981
- 1981-10-30 EP EP81201220A patent/EP0053409A1/fr not_active Withdrawn
- 1981-12-01 MA MA19548A patent/MA19344A1/fr unknown
- 1981-12-01 CA CA000391306A patent/CA1184388A/fr not_active Expired
- 1981-12-01 IL IL64437A patent/IL64437A/xx unknown
- 1981-12-02 JP JP56194330A patent/JPS57118032A/ja active Pending
- 1981-12-02 ZA ZA818362A patent/ZA818362B/xx unknown
- 1981-12-02 ES ES507639A patent/ES507639A0/es active Granted

Also Published As

Publication number	Publication date
MA19344A1 (fr)	1982-07-01
IL64437A0 (en)	1982-03-31
IL64437A (en)	1984-04-30
CA1184388A (fr)	1985-03-26
ES8207095A1 (es)	1982-09-01
JPS57118032A (en)	1982-07-22
ZA818362B (en)	1982-10-27
EP0053409A1 (fr)	1982-06-09
ES507639A0 (es)	1982-09-01

Legal Events

Date	Code	Title	Description
1982-07-01	A1B	A search report has been drawn up
1983-08-01	BV	The patent application has lapsed

Publication	Publication Date	Title
CA1261116A (fr)	1989-09-26	Methode pour eliminer les impuretes cationique dans l'acide phosphorique du procede par voie humide
US4308244A (en)	1981-12-29	Process for producing fluorine compounds and amorphous silica
CN104843712A (zh)	2015-08-19	一种工业氟硅酸的提纯并联产白炭黑的方法
US3966877A (en)	1976-06-29	Method of processing of waste gases
IL100495A (en)	1996-03-31	Production of phosphoric acid and hydrogen fluoride from phosphate rock and fluosilicic acid
RU2720313C2 (ru)	2020-04-28	Способ получения фторида кальция из фторкремниевой кислоты
HK1251215A1 (en)	2019-01-25	Process for preparing calcium fluoride from fluosilicic acid
US4374810A (en)	1983-02-22	Recovery of fluorine from pond water of wet process phosphoric acid plants and recycling of defluorinated water
WO2003072501A1 (fr)	2003-09-04	Procede de preparation de silice pure
AU771643B2 (en)	2004-04-01	Production of fumed silica
NL8201925A (nl)	1983-12-01	Werkwijze voor het bereiden van zuiver siliciumdioxide, alsmede siliciumdioxide verkregen met deze werkwijze.
US4213951A (en)	1980-07-22	Recovery of hydrofluoric acid from fluosilicic acid with high pH hydrolysis
US3494736A (en)	1970-02-10	Process for removing silicon,aluminum and fluorine from wet process phosphoric acid
US3625648A (en)	1971-12-07	Recovery of fluorine and p2o5 from dilute aqueous acidic phosphatic solutions
US2369791A (en)	1945-02-20	Process for producing hydrofluosilicic acid and/or fluosilicates
NL8006571A (nl)	1982-07-01	Werkwijze voor het winnen van een uraniumbevattend concentraat en fosforzuur, alsmede uraniumbevattend concentraat en fosforzuur verkregen volgens deze werkwijze.
US2785953A (en)	1957-03-19	Process for preparing a dry mixture of ammonium fluosilicate and silica
FI74933C (fi)	1988-04-11	Foerfarande foer framstaellning av fosforsyra.
CN1319561A (zh)	2001-10-31	氟化合物和二氧化硅的生产方法
SE439477B (sv)	1985-06-17	Forfarande for produktion av huvudsakligen ren kiselsyra fran avfallskiselsyra
US5002744A (en)	1991-03-26	Method for defluorinating wet process phosphoric acid
US3563699A (en)	1971-02-16	Process for the preparation of very pure cryolite from sodium fluosilicate and ammonia
JPH04228401A (ja)	1992-08-18	フッ化水素の製造方法
EP0068663B1 (fr)	1984-09-19	Procédé et agent d'extraction pour l'élimination des composés de fluor d'acide phosphorique aqueux
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