Method for preventing the undesirable condensation of aluminum chloride in a fractional distillation column
Patent 4385964 Issued on May 31, 1983. Estimated Expiration Date: 
May 26, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 26, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2387228 Process for the purification of aluminum chloride Patent #: 4035169 InventorsAssigneeApplicationNo. 06/382312 filed on 05/26/1982US Classes:203/50, ADDING MATERIAL TO DISTILLAND EXCEPT WATER OR STEAM PER SE203/75, And return of distillation product to a previous distillation zone203/77, Initial distillation under positive pressure or vacuum203/78, And returning distillation product to a previous distillation zone203/82, And returning distillation product to a previous distillation zone203/84, And returning distillation product to a previous distillation zone423/135, Group IIIA metal423/463, Plural metal or metal and ammonium containing423/495, Group IIIA metal or beryllium (Al, Ga, In, Tl, or Be)95/228With coolingExaminersPrimary: Sever, FrankAttorney, Agent or FirmInternational ClassesC01G 1/06 (20060101)C01G 23/02 (20060101) C01F 7/62 (20060101) C01G 23/00 (20060101) C01F 7/00 (20060101) C01G 49/10 (20060101) B01D 3/14 (20060101) C01B 33/107 (20060101) C01B 33/00 (20060101) AbstractA method is disclosed for preventing the condensation of aluminum chloride (AlCl3) in a fractional distillation column which is operated to separate a fraction which does not include AlCl3 from a mixture containing AlCl3 and other metal chlorides and which is operated at temperatures which include the sublimation or melting points of AlCl3 at the operating pressure of the column. According to this method, titanium tetrachloride (TiCl4) is maintained in the column in an amount at least as great, by weight, as the amount of AlCl3 contained in the mixture. |
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