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Class Information
Number: 585/867
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By addition of extraneous agent, e.g., solvent, etc. > Organic agent > Hydrocarbon
Description: Subject matter wherein an agent contains only carbon and hydrogen in its molecule.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5789647 |
Process for the extraction of natural carotenoid dyes |
Aug. 4, 1998 |
| 5720857 |
Separation of 1,2,4-trimethylbenzene from 1,2,3-trimethylbenzene by azeotropic distillation |
Feb. 24, 1998 |
| 5710357 |
Process for recovering olefins from cat-cracked gas without accumulating undesirable oxides of nitrogen |
Jan. 20, 1998 |
| 5675055 |
Acidification/extraction treatment of waste caustic stream |
Oct. 7, 1997 |
| 5605606 |
Removal foulants from distillation train using non-solvent precipitation |
Feb. 25, 1997 |
| 5510568 |
Process for the removal of mercaptans and hydrogen sulfide from hydrocarbon streams |
Apr. 23, 1996 |
| 5502971 |
Low pressure recovery of olefins from refinery offgases |
Apr. 2, 1996 |
| 5481060 |
Process for the removal of heavy hydrocarbonaceous co-products from a vapor effluent from a normally gaseous hydrocarbon dehydrogenation reaction zone |
Jan. 2, 1996 |
| 5476986 |
Method for cleaning a mixture of air and vapor from volatile crude oil with recovery of the hydrocarbons, and a system for use in the method |
Dec. 19, 1995 |
| 5444176 |
Process for recovering olefins from cat-cracked gas without accumulating undesirable oxides of nitrogen |
Aug. 22, 1995 |
| 5399244 |
Process to recover benzene from mixed hydrocarbons by extractive distillation |
Mar. 21, 1995 |
| 5382745 |
Separating vinylcyclohexene from a butadiene extracting solvent |
Jan. 17, 1995 |
| 5354475 |
Process for separating polar and non-polar constituents from coal tar distillates |
Oct. 11, 1994 |
| 5352336 |
Removal of low-boiling fractions from high temperature heat transfer systems |
Oct. 4, 1994 |
| 5322927 |
Method for producing polymers |
Jun. 21, 1994 |
| 5288370 |
Process for the separation of butenes and butanes by extractive distillation |
Feb. 22, 1994 |
| 5284991 |
Cyanide removal from oily solid using a solvent extraction process |
Feb. 8, 1994 |
| 5256258 |
Removal of low-boiling fractions from high temperature heat transfer systems |
Oct. 26, 1993 |
| 5250157 |
Separation of toluene from methyl isobutyl ketone by azeotropic distillation |
Oct. 5, 1993 |
| 5191150 |
Method for separating conjunct polymeric byproducts from mixture containing hydrofluoric acid and a sulfone |
Mar. 2, 1993 |
| 5162597 |
Olefin disproportionation and application thereof |
Nov. 10, 1992 |
| 5146042 |
Desulfurization of light olefins |
Sep. 8, 1992 |
| 5135620 |
Separation of ethylbenzene from xylenes by extractive distillation |
Aug. 4, 1992 |
| 5127962 |
Method for cleaning apparatus used for measuring dissolved gas in oil |
Jul. 7, 1992 |
| 5122236 |
Method for removal of dimethyl ether and methanol from C.sub.4 hydrocarbon streams |
Jun. 16, 1992 |
| 5120899 |
Diamondoid recovery from natural gas fields |
Jun. 9, 1992 |
| 5100515 |
Separation of alkenes from close-boiling alkanes |
Mar. 31, 1992 |
| 5085741 |
Extractive distillation of low boiling alkene/alkane mixtures |
Feb. 4, 1992 |
| 5055178 |
Process for extraction of water mixed with a liquid fluid |
Oct. 8, 1991 |
| 5055162 |
Extractive distillation of cycloalkane/alkane feeds |
Oct. 8, 1991 |
| 5034118 |
Non-oxidative removal of hydrogen sulfide from gaseous, petrochemical, and other streams |
Jul. 23, 1991 |
| 5012034 |
Process for separating styrene from styrene-containing hydrocarbon streams |
Apr. 30, 1991 |
| 5004862 |
Process for recycling and purifying condensate from a hydrocarbon or alcohol synthesis process |
Apr. 2, 1991 |
| 4985083 |
Method for decontaminating a material and an assembly for carrying out said method |
Jan. 15, 1991 |
| 4982049 |
Purification of hydrocarbonaceous fractions |
Jan. 1, 1991 |
| 4962276 |
Process for removing mercury from water or hydrocarbon condensate |
Oct. 9, 1990 |
| 4962274 |
Process for separating alkyl-substituted naphthalene derivatives using clathrate complexes |
Oct. 9, 1990 |
| 4955468 |
Separation of hydrocarbon mixtures |
Sep. 11, 1990 |
| 4954224 |
Extractive distillation of hydrocarbon feeds employing mixed solvent |
Sep. 4, 1990 |
| 4952747 |
Removal of diamondoid compounds from hydrocarbonaceous fractions |
Aug. 28, 1990 |
| 4952748 |
Purification of hydrocarbonaceous fractions |
Aug. 28, 1990 |
| 4952749 |
Removal of diamondoid compounds from hydrocarbonaceous fractions |
Aug. 28, 1990 |
| 4948472 |
Extractive distillation of hydrocarbon mixtures employing mixed solvent |
Aug. 14, 1990 |
| 4948470 |
Extractive distillation of alkane/cycloalkane feed employing mixed solvent |
Aug. 14, 1990 |
| 4946560 |
Process for separating alpha and internal olefins |
Aug. 7, 1990 |
| 4931145 |
Separation of benzene from acetone by azeotropic distillation |
Jun. 5, 1990 |
| 4915794 |
Process for converting internal olefins to alpha olefins |
Apr. 10, 1990 |
| 4822948 |
Self-cooled process for extracting heavy hydrocarbon fractions |
Apr. 18, 1989 |
| 4695672 |
Process for extractive-stripping of lean hydrocarbon gas streams at high pressure with a preferential physical solvent |
Sep. 22, 1987 |
| 4601739 |
Process for fractional distillation |
Jul. 22, 1986 |
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