Classifications

• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
  • C01F5/00—Compounds of magnesium
  • C01F5/26—Magnesium halides
  • C01F5/30—Chlorides
• • 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
  • C01B33/1071—Tetrachloride, trichlorosilane or silicochloroform, dichlorosilane, monochlorosilane or mixtures thereof
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
  • C01B35/00—Boron; Compounds thereof
  • C01B35/06—Boron halogen compounds
  • C01B35/061—Halides
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
  • C01B9/00—General methods of preparing halides
  • C01B9/02—Chlorides
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
  • C01F7/00—Compounds of aluminium
  • C01F7/48—Halides, with or without other cations besides aluminium
  • C01F7/56—Chlorides
  • C01F7/62—Purification
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
  • C01G1/00—Methods of preparing compounds of metals not covered by subclasses C01B, C01C, C01D, or C01F, in general
  • C01G1/06—Halides

Definitions

• U.S. Patent No. 3,786,135 describes the gaseous products of the reaction as including aluminum chloride, carbon oxides and entrained solid and liquid particles including aluminum, carbon, aluminum oxychloride and/or aluminum hydroxychloride as well as condensable volatile constituents.
• gaseous products of the reaction as including aluminum chloride, carbon oxides and entrained solid and liquid particles including aluminum, carbon, aluminum oxychloride and/or aluminum hydroxychloride as well as condensable volatile constituents.
• Various processes have been proposed for elimination or reduction for these unwanted byproducts; for instance, the aforesaid U.S. Patent No. 3,786,135 describes a process involving multi-stage selective cooling to separate the gaseous aluminum chloride product from the unwanted gaseous components.
• a similar process is described in U.S. Patent No. 3,929,975.
• Preferred surface active materials include the solid feed material itself which is to be chlorinated, similar oxides or carbonaceous materials, which may if desired be activated.
• the surface active material must also be such that it is either inert toward the hydrogen, metal chloride and chlorine, or, if reactive, such that any product formed will not contaminate the chloride product.
• Fluid bed reactor 1 is either continuously or batch fed with starting materials 3 such as the aforesaid PCACH (an oxide-containing composition) mixed with a coke activated by partial calcination (typically in a weight ratio of 80:20 respectively) .
• Chlorine gas 2 (which may be mixed with nitrogen gas) is fed to the bottom of the reactor 1 to fludize the solid reactants and to chlorinate the PCACH to produce anhydrous aluminum chloride (AICI3) .
• AICI3 produced flows upward to mixing chamber 5 where it is mixed with hydrogen or nitrogen gas 4 or both.
• the product gas stream also contains all the undesirable chlorinated by-product gases such as PCBs.
• the mixed gas streams flow into reaction bed 6 containing the surface active material, such as activated alumina or coke or one or more of the reactant materials, such as PCACH.
• the bed is heated to the desired temperature by heating coils 7.
• the chlorinated hydrocarbons are decomposed to chlorine gas, hydrocarbons, water vapor and/ or carbon oxides.
• the AICI3 is then recovered in desublimer 8 while the other gases pass through to scrubber 9 where they are separated and the chlorine recovered. This type of apparatus was utilized in the Examples below.
• Example 1 The following Examples will illustrate several embodiments of the present invention.
• Example 1 The following Examples will illustrate several embodiments of the present invention.
• the alumina/coke mixture was the PCACH/coke reaction mixture to a test reactor (as reactor 1 in the Figure) . It will be seen by comparison of the data of Tables 1 and 2 with these data that, except at low temperature, the combination of the surface active material and the hydrogen has a synergistic effect, reducing the organohalogen compound content below that obtained with the surface active material or hydrogen alone. It is preferable from an economic point of view to use the chlorination reactor feed (i.e., the alumina/coke mixture) as the surface active - 13 -

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Inorganic Chemistry (AREA)
• Life Sciences & Earth Sciences (AREA)
• Geology (AREA)
• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

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Publications (2)

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• 1986
  • 1986-06-13 EP EP19860904519 patent/EP0227797A4/fr not_active Withdrawn
  • 1986-06-13 AU AU61227/86A patent/AU585051B2/en not_active Ceased
  • 1986-06-13 JP JP61503574A patent/JPS63500096A/ja active Pending
  • 1986-06-13 WO PCT/US1986/001294 patent/WO1987000157A1/fr not_active Ceased
  • 1986-06-13 BR BR8606749A patent/BR8606749A/pt unknown

Patent Citations (1)

Non-Patent Citations (3)

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