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Class Information
Number: 585/265
Name: Chemistry of hydrocarbon compounds > Adding hydrogen to unsaturated bond of hydrocarbon, i.e., hydrogenation > Plural hydrogenation stages
Description: Subject matter wherein an effluent material from a hydrogenation reaction is hydrogenated, e.g., passage of the feed through a stage having a certain catalyst activity, and a subsequent state having a different activity, etc.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7381854 |
Selective hydrogenation of alpha-methyl-styrene to cumene |
Jun. 3, 2008 |
| 7319176 |
Selective hydrogenation of acetylenes |
Jan. 15, 2008 |
| 7223894 |
Process for total hydrogenation using a catalytic reactor with a hydrogen-selective membrane |
May. 29, 2007 |
| 7115789 |
Process for removal of alkynes and/or dienes from an olefin stream |
Oct. 3, 2006 |
| 7070690 |
Process for conversion of hydrocarbons on a catalyst with controlled acidity |
Jul. 4, 2006 |
| 7045669 |
Dual pressure catalytic distillation hydrogenation column system for the front end of an ethylene plant |
May. 16, 2006 |
| 7041860 |
Process for the selective hydrogenation of alkynes |
May. 9, 2006 |
| 7038097 |
Dual bed process using two different catalysts for selective hydrogenation of acetylene and dienes |
May. 2, 2006 |
| 6858766 |
Process for selectively hydrogenating mixed phase front end C2-C10 greater unsaturated hydrocarbons |
Feb. 22, 2005 |
| 6855245 |
Hydrogenation process |
Feb. 15, 2005 |
| 6837989 |
Cycle oil conversion process |
Jan. 4, 2005 |
| 6822128 |
Flow control in a three-phase monolithic catalyst reactor |
Nov. 23, 2004 |
| 6759562 |
Olefin plant recovery system employing a combination of catalytic distillation and fixed bed catalytic steps |
Jul. 6, 2004 |
| 6740787 |
Process for treatment of C4 hydrocarbons that comprise butadiene and acetylene compounds that comprise stages for distillation and selective hydrogenation |
May. 25, 2004 |
| 6734328 |
Process for the selective hydrogenation of alkynes |
May. 11, 2004 |
| 6693225 |
Process for hydrogenating cuts containing hydrocarbons, in particular unsaturated molecules containing at least two double bonds or at least one triple bond |
Feb. 17, 2004 |
| 6627778 |
Selective hydrogenation process for removing C10-C16 diolefins |
Sep. 30, 2003 |
| 6569318 |
Process for conversion of hydrocarbons on a catalyst with controlled acidity |
May. 27, 2003 |
| 6414205 |
Process for the removal of MAPD from hydrocarbon streams |
Jul. 2, 2002 |
| 6410811 |
Selective hydrogenation process comprising partial separation of hydrogen by a membrane upstream of a reactive column |
Jun. 25, 2002 |
| 6407300 |
Apparatus and process for hydrogenations |
Jun. 18, 2002 |
| 6261442 |
Process for converting hydrocarbons by treatment in a distillation zone comprising withdrawing a stabilized distillate, associated with a reaction zone, and its use for hydrogenating benzene |
Jul. 17, 2001 |
| 6179996 |
Selective purge for hydrogenation reactor recycle loop |
Jan. 30, 2001 |
| 6121333 |
Process for the preparation of hydrocarbons from synthesis gas |
Sep. 19, 2000 |
| 6011188 |
Multi-bed selective hydrogenation of acetylenes |
Jan. 4, 2000 |
| 5998683 |
Process for forming cyclopentane from dicyclopentadiene |
Dec. 7, 1999 |
| 5925799 |
Catalytic distillation and hydrogenation of heavy unsaturates in an olefins plant |
Jul. 20, 1999 |
| 5817227 |
Process for the selective reduction to the content of benzene and light unsaturated compounds in a hydrocarbon cut |
Oct. 6, 1998 |
| 5741414 |
Method of manufacturing gas oil containing low amounts of sulfur and aromatic compounds |
Apr. 21, 1998 |
| 5414170 |
Mixed phase front end C.sub.2 acetylene hydrogenation |
May. 9, 1995 |
| 5345019 |
Method of hydrocracking paraffins emanating from the Fischer-Tropsch process using catalysts based on H-Y zeolite |
Sep. 6, 1994 |
| 5306860 |
Method of hydroisomerizing paraffins emanating from the Fischer-Tropsch process using catalysts based on H-Y zeolite |
Apr. 26, 1994 |
| 5306852 |
Process for selective hydrogenation, in particular of diolefins in steam cracking volatiles, with a catalyst in the form of beds which are used successively |
Apr. 26, 1994 |
| 5227553 |
Selective hydrogenation of crude high-butadiene C4 cuts |
Jul. 13, 1993 |
| 5189233 |
Process for the production of cyclohexane by liquid phase hydrogenation of benzene |
Feb. 23, 1993 |
| 4995961 |
Process and apparatus for hydrogenating hydrocarbons |
Feb. 26, 1991 |
| 4960960 |
Hydrogenation process |
Oct. 2, 1990 |
| 4864067 |
Process for hydrotreating olefinic distillate |
Sep. 5, 1989 |
| 4849093 |
Catalytic aromatic saturation of hydrocarbons |
Jul. 18, 1989 |
| 4648959 |
Hydrogenation method for adsorptive separation process feedstreams |
Mar. 10, 1987 |
| 4472264 |
Process for converting solid carbonaceous materials to methane |
Sep. 18, 1984 |
| 4469907 |
Selective hydrogenation method for hydrocarbons |
Sep. 4, 1984 |
| 4230897 |
Process for selectively hydrogenating a hydrocarbon cut containing at least one diolefinic hydrocarbon and at least one acetylenic hydrocarbon using a palladium catalyst with crystallites of a |
Oct. 28, 1980 |
| 4218303 |
Coal pyrolysis |
Aug. 19, 1980 |
| 4108912 |
Two-stage hydrogenation of benzene to form cyclohexane using nickel catalyst |
Aug. 22, 1978 |
| 4090942 |
Process for producing benzene |
May. 23, 1978 |
| 3994986 |
Method of producing cyclopentene |
Nov. 30, 1976 |
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