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Class Information
Number: 203/50
Name: Distillation: processes, separatory > Adding material to distilland except water or steam per se
Description: Processes including the step of adding material other than water or steam per se to the distilland or distillation zone.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7410555 |
Process and apparatus for catalytic distillations |
Aug. 12, 2008 |
| 7326823 |
Aromatic compound recovery |
Feb. 5, 2008 |
| 7241928 |
Process for the manufacture of halocarbons and selected compounds and azeotropes with HF |
Jul. 10, 2007 |
| 7226527 |
Method for recovering crude 1,3-butadiene by extractive distillation from a C.sub.4 cut |
Jun. 5, 2007 |
| 6969446 |
Method for producing concentrated nitric acid and installation for carrying out a method of this type |
Nov. 29, 2005 |
| 6863780 |
Process of separating/purifying pentafluoropropane |
Mar. 8, 2005 |
| 6514387 |
Rectifying column for extractive distillation of close-boiling or azeotropic boiling mixtures |
Feb. 4, 2003 |
| 6441252 |
Apparatus for producing phenol using reactive distillation |
Aug. 27, 2002 |
| 6375808 |
Process for producing difluoromethane |
Apr. 23, 2002 |
| 6251228 |
Photopolymer washout fluid solvent distillation apparatus and method |
Jun. 26, 2001 |
| 6224781 |
Compositions comprising hydrofluorocarbons and their manufacture |
May. 1, 2001 |
| 6221830 |
Purification process for hexafluoroethane products |
Apr. 24, 2001 |
| 6093855 |
Separation of the divinyl ether of diethylene glycol or triethylene glycol from the monovinyl ether of the corresponding oliogethylene glycol |
Jul. 25, 2000 |
| 6024840 |
Propylene oxide purification |
Feb. 15, 2000 |
| 5902911 |
Production of 2-chloro-2-hydrohexafluoropropane and azeotropes thereof with HF |
May. 11, 1999 |
| 5772852 |
Separating HCI and halocarbons |
Jun. 30, 1998 |
| 5718807 |
Purification process for hexafluoroethane products |
Feb. 17, 1998 |
| 5595634 |
Process for selective hydrogenation of highly unsaturated compounds and isomerization of olefins in hydrocarbon streams |
Jan. 21, 1997 |
| 5523015 |
Azeotropes of hydrogen fluoride with dichloromethane, difluoromethane and chlorofluoromethane |
Jun. 4, 1996 |
| 5490907 |
Method for treating sludges |
Feb. 13, 1996 |
| 5445715 |
Separation of m-xylene from xylenes by azeotropic distillation |
Aug. 29, 1995 |
| 5445716 |
Separation of ethanol from isopropanol by extractive distillation |
Aug. 29, 1995 |
| 5430232 |
Enhanced volatilization of polychlorinated biphenyl compounds |
Jul. 4, 1995 |
| 5401430 |
Azeotropic mixture of hydrogen fluoride and 1,1,1-trifluoro-2-chloroethane |
Mar. 28, 1995 |
| 5344528 |
Recovery of phenol from low concentrations with sodium sulfate |
Sep. 6, 1994 |
| 5308452 |
Photopolymer washout fluid solvent distillation apparatus and method |
May. 3, 1994 |
| 5124004 |
Distillation process for ethanol |
Jun. 23, 1992 |
| 5096538 |
Vacuum drying method |
Mar. 17, 1992 |
| 5032230 |
Vacuum draft submerged combustion separation system |
Jul. 16, 1991 |
| 4975156 |
Process for the separation of hydrogen fluoride, 1,1-dichloro-1-fluoroethane and 1-chloro-1,1-difluoroethane from liquid mixtures thereof |
Dec. 4, 1990 |
| 4961826 |
Distillation process for ethanol |
Oct. 9, 1990 |
| 4956052 |
Process for separation using supercritical fluid |
Sep. 11, 1990 |
| 4950364 |
Process for the separation of 1,1-dichloro-1-fluoroethane and 1,1,1,3,3-pentafluorobutane |
Aug. 21, 1990 |
| 4946561 |
Process for obtaining trioxane from aqueous solutions by high-pressure extraction |
Aug. 7, 1990 |
| 4917773 |
Process for introducing zirconium tetrachloride, hafnium tetrachloride and mixtures thereof into a column for the continuous extractive distillation under pressure of said chlorides |
Apr. 17, 1990 |
| 4913778 |
Molten salt scrubbing of zirconium or hafnium tetrachloride |
Apr. 3, 1990 |
| 4865693 |
Preparation of complexes of zirconium and hafnium tetrachlorides with phosphorus oxychloride |
Sep. 12, 1989 |
| 4865694 |
Electrochemical decomposition of complexes of zirconium or hafnium |
Sep. 12, 1989 |
| 4714604 |
Method of separating HF and SiF.sub.4 from HCl |
Dec. 22, 1987 |
| 4647344 |
Recovery of isoprene from a C.sub.5 -hydrocarbon mixture |
Mar. 3, 1987 |
| 4495035 |
Fluid handling method with improved purification |
Jan. 22, 1985 |
| 4437941 |
Separation of hydrocarbon and alcohol azeotropic mixtures by distillation with anhydrous ammonia |
Mar. 20, 1984 |
| 4435251 |
Method for purification of 2-methyleneglutaronitrile |
Mar. 6, 1984 |
| 4434029 |
Process for producing unsaturated nitrile |
Feb. 28, 1984 |
| 4410400 |
Extractive distilling with reworking of residue |
Oct. 18, 1983 |
| 4385964 |
Method for preventing the undesirable condensation of aluminum chloride in a fractional distillation column |
May. 31, 1983 |
| 4362601 |
Method for distilling ethyl alcohol by adding salt or salts |
Dec. 7, 1982 |
| 4349412 |
Method of concentrating and drying water-containing fluent media |
Sep. 14, 1982 |
| 4330374 |
Recovery of anhydrous hydrogen iodide |
May. 18, 1982 |
| 4294665 |
Separation of acetonitrile from crude olefinically unsaturated nitrile |
Oct. 13, 1981 |
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