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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:
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Patent Number Title Of Patent Date Issued
8518351 Apparatus for producing diesel Aug. 27, 2013
8475745 Apparatus for hydroprocessing hydrocarbons Jul. 2, 2013
8470251 Apparatus for separating pitch from slurry hydrocracked vacuum gas oil Jun. 25, 2013
8389783 Process for hydrogenation of an aromatic feedstock that as catalyst uses a suspension of metal nanoparticles containing a nitrogen-containing ligand in an ionic liquid Mar. 5, 2013
8304592 Production of paraffinic fuel from renewable feedstocks Nov. 6, 2012
8221706 Apparatus for multi-staged hydroprocessing Jul. 17, 2012
8202480 Apparatus for separating pitch from slurry hydrocracked vacuum gas oil Jun. 19, 2012
8188327 Isooctene/isooctane process May. 29, 2012
8158069 Apparatus for mild hydrocracking Apr. 17, 2012
8158070 Apparatus for hydroprocessing two streams Apr. 17, 2012
7994375 Production of gasoline, diesel, naphthenes and aromatics from lignin and cellulosic waste by one step hydrocracking Aug. 9, 2011
7927480 Process for desulfurization of cracked naphtha Apr. 19, 2011
7611683 Apparatus and process for the continuous reaction of a liquid with a gas over a solid catalyst Nov. 3, 2009
7473811 Process for the hydrogenation of olefins Jan. 6, 2009
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
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
5306860 Method of hydroisomerizing paraffins emanating from the Fischer-Tropsch process using catalysts based on H-Y zeolite 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

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