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Class Information
Number: 203/56
Name: Distillation: processes, separatory > Adding material to distilland except water or steam per se > At least two materials > One additive an alcohol or ether
Description: Processes in which the additional material comprises an alcohol or an ether and at least one other substance.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6632330 |
Process for purification of alkyl alkanoate |
Oct. 14, 2003 |
| 6197163 |
Process for removing impurities from petroleum products |
Mar. 6, 2001 |
| 6191285 |
Process for the preparation of ketorolac tromethamine |
Feb. 20, 2001 |
| 6045808 |
Method for removing high boiling solvents from drug formulations by vacuum drying |
Apr. 4, 2000 |
| 6004434 |
Method of recycling cleaning solvent |
Dec. 21, 1999 |
| 5863391 |
Purification of a methanol stream |
Jan. 26, 1999 |
| 5830325 |
Separating and removing 1, 1, 1-trifluoroethane by using azeotropic distillation |
Nov. 3, 1998 |
| 5730844 |
Liquid phthalic anhydride recovery process using a rectification tower with benzoic acid control |
Mar. 24, 1998 |
| 5718808 |
Solvent assisted process for recovery of phthalic anhydride in the liquid phase by distillation |
Feb. 17, 1998 |
| 5693193 |
Process for recovering propylene oxide |
Dec. 2, 1997 |
| 5628880 |
Etherification--hydrogenation process |
May. 13, 1997 |
| 5562863 |
Methods and compositions for inhibiting vinyl aromatic monomer polymerization |
Oct. 8, 1996 |
| 5470442 |
Separating and removing impurities from tetrafluoroethanes by using extractive distillation |
Nov. 28, 1995 |
| 5470440 |
Method for inhibiting vinyl aromatic monomer polymerization |
Nov. 28, 1995 |
| 5453167 |
Separation of xylenes by extractive distillation |
Sep. 26, 1995 |
| 5441608 |
Separation of xylenes by extractive distillation |
Aug. 15, 1995 |
| 5399244 |
Process to recover benzene from mixed hydrocarbons by extractive distillation |
Mar. 21, 1995 |
| 5340446 |
Purification of propylene oxide by cosolvent extractive distillation |
Aug. 23, 1994 |
| 5288370 |
Process for the separation of butenes and butanes by extractive distillation |
Feb. 22, 1994 |
| 5238541 |
Process for production of an ether-rich additive |
Aug. 24, 1993 |
| 5232558 |
Separation of 4-methyl-2-pentanone from formic acid by extractive distillation with DMSO |
Aug. 3, 1993 |
| 5228956 |
Separation of 3-pentanone from formic acid by extractive distillation |
Jul. 20, 1993 |
| 5194123 |
Separation of 4-methyl-2-pentanone from acetic acid by extractive distillation with DMSO |
Mar. 16, 1993 |
| 5190619 |
Separation of 3-methyl-2-butanone from formic acid by extractive distillation with DMSO |
Mar. 2, 1993 |
| 5178735 |
Process for the supercritical extraction and separation of solid samples |
Jan. 12, 1993 |
| 5173156 |
Dehydration of formic acid by extractive distillation |
Dec. 22, 1992 |
| 5154802 |
Separation of unsaturated hydrocarbons by extractive distillation |
Oct. 13, 1992 |
| 5135617 |
Separation of aromatic from olefinic hydrocarbons by extractive distillation |
Aug. 4, 1992 |
| 5106459 |
Separation of p-menthane from p-cymene by extractive distillation |
Apr. 21, 1992 |
| 5100515 |
Separation of alkenes from close-boiling alkanes |
Mar. 31, 1992 |
| 5094723 |
Separation of m-xylene from p-xylene or o-xylene by extractive distillation with alcohols |
Mar. 10, 1992 |
| 5092965 |
Separation of 4-methyl-2-pentanone from acetic acid by extractive distillation with DMFA |
Mar. 3, 1992 |
| 5085740 |
Separation of alkenes from alkanes |
Feb. 4, 1992 |
| 5069756 |
Separation of cyclohexane from cyclohexene by azeotropic or extractive distillation |
Dec. 3, 1991 |
| 5055162 |
Extractive distillation of cycloalkane/alkane feeds |
Oct. 8, 1991 |
| 5037512 |
Process for the purification of benzoic acid by distillation with an amine |
Aug. 6, 1991 |
| 5032232 |
Extractive distillation of hydrocarbon mixtures |
Jul. 16, 1991 |
| 5019217 |
Separation of m-xylene from o-xylene by extractive distillation using esters |
May. 28, 1991 |
| 5006206 |
Propylene oxide purification |
Apr. 9, 1991 |
| 4994151 |
Separation of 4-methyl-2-pentanone from formic acid by extractive distillation with dimethylamides |
Feb. 19, 1991 |
| 4957595 |
Separation of 3-methyl-2-butanone from formic acid by extractive distillation with sulfolane |
Sep. 18, 1990 |
| 4956052 |
Process for separation using supercritical fluid |
Sep. 11, 1990 |
| 4954224 |
Extractive distillation of hydrocarbon feeds employing mixed solvent |
Sep. 4, 1990 |
| 4948472 |
Extractive distillation of hydrocarbon mixtures employing mixed solvent |
Aug. 14, 1990 |
| 4948469 |
Separation of formic acid from dioxane by extractive distillation with amides |
Aug. 14, 1990 |
| 4944849 |
Extractive distillation of cycloalkane/alkane feed employing solvent mixture |
Jul. 31, 1990 |
| 4935103 |
Separation of n-propanol from t-amyl alcohol by extractive distillation |
Jun. 19, 1990 |
| 4935100 |
Dehydration of formic acid by extractive distillation |
Jun. 19, 1990 |
| 4925533 |
Separation of vinyl acetate from ethyl acetate by extractive distillation with acids or acid amides |
May. 15, 1990 |
| 4921581 |
Extractive distillation of hydrocarbons employing solvent mixture |
May. 1, 1990 |
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