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Inventor:
Ryu; J. Yong
Address:
League City, TX
No. of patents:
18
Patents:












Patent Number Title Of Patent Date Issued
8569534 Process for producing diphenyl carbonate October 29, 2013
Processes for producing diaryl carbonates are disclosed, where such processes may provide for the production of diaryl carbonates from green house gases, such as carbon dioxide. The processes disclosed advantageously integrate diethyl carbonate and diaryl carbonate production, elimin
7737079 Ni catalyst, process for making catalysts and selective hydrogenation process June 15, 2010
More selective and efficient Ni hydrotreating catalysts are those which contain more than about 60% of the Ni content on the peripheral surface of porous supports, such as extruded alumina, which may be obtained by spraying an atomized solution of a Ni compound onto the support and d
7737075 Ni catalyst, process for making catalysts and selective hydrogenation process June 15, 2010
More selective and efficient Ni hydrotreating catalysts are those which contain more than about 60% of the Ni content on the peripheral surface of porous supports, such as extruded alumina, which may be obtained by spraying an atomized solution of a Ni compound onto the support and d
7408089 Ni catalyst, process for making catalysts and selective hydrogenation process August 5, 2008
More selective and efficient Ni hydrotreating catalysts are those which contain more than about 60% of the Ni content on the peripheral surface of porous supports, such as extruded alumina, which may be obtained by spraying an atomized solution of a Ni compound onto the support and d
7378540 Process for producing organic carbonates May 27, 2008
A process for producing various organic carbonates by performing transesterification and disproportionation reactions in dual vapor/liquid phase mode preferably in the presence of solid catalyst composition selected from the group consisting of oxides, hydroxides, oxyhydroxides or al
7348463 Hydrogenation of aromatic compounds March 25, 2008
A process for hydrogenating aromatic compounds to produce hydrogenated cyclic compound by contacting an aromatic compound with hydrogen under conditions of pressure and temperature to react the hydrogen and aromatic compound in the presence of a catalyst comprising from 4 to 14 wt. % Ni
7314947 Process for making dialkyl carbonates January 1, 2008
A process for the production of dialkyl carbonates from the reaction of alcohol, for example C.sub.1-C.sub.3 alcohols, with urea is disclosed wherein the water and ammonium carbamates impurities in the feed are removed in a prereactor. The water is reacted with urea in the feed to pr
7297824 Ni hydrogenation catalysts, manufacture and use November 20, 2007
Improved Ni catalysts for hydrogenation reactions are disclosed. The catalysts are useful for hydrogenation such as selective hydrogenation of acetylenic impurities in crude olefin and diolefin streams. The catalysts are prepared by depositing nickel on a porous support which has the
7288686 Hydrogenation catalyst and hydrogenation process October 30, 2007
A supported hydrogenation catalyst comprising (1)Pd or a Group 8 metal comprising Pd and one other Group 8 metal, preferably a Group 8 metal selected from Pt, Ir, Ru, Co or Ni, and (2) at least two metals selected from Ag, Zn or Bi, preferably Ag and at least one of Zn or Bi. Optionally
7288668 Process for making diaryl carbonate October 30, 2007
Diphenyl carbonate is produced by reacting phenol with diethyl carbonate in a series of fixed bed reactors each of which is connected at different position on a distillation column via side draw and return streams. The composition of material in a distillation column varies along the len
7279592 Process for making dialkyl carbonates October 9, 2007
A process for the production of dialkyl carbonates from the reaction of alcohol, for example C.sub.1-C.sub.3 alcohols, with urea is disclosed wherein the water and ammonium carbamates impurities in the feed are removed in a prereactor. The water is reacted with urea in the feed to pr
7196035 Ni hydrogenation catalysts, manufacture and use March 27, 2007
Improved Ni catalysts for hydrogenation reactions are disclosed. The catalysts are useful for hydrogenation such as selective hydrogenation of acetylenic impurities in crude olefin and diolefin streams. The catalysts are prepared by depositing nickel on a porous support which has the
7041860 Process for the selective hydrogenation of alkynes May 9, 2006
An improved selective hydrogenation process for removing acetylenic impurities such as vinyl acetylene, ethyl acetylene, propyl acetylene and acetylene in a steam cracked crude butadiene stream by selective hydrogenation is carried out in two steps. In the first step, the partial sel
7022645 Ni hydrogenation catalysts, manufacture and use April 4, 2006
Improved Ni catalysts for hydrogenation reactions are disclosed. The catalysts are useful for hydrogenation such as selective hydrogenation of acetylenic impurities in crude olefin and diolefin streams. The catalysts are prepared by depositing nickel on a porous support which has the
6717022 Process for selective hydrogenation of alkynes and catalyst therefor April 6, 2004
Acetylenic compounds in olefin streams such as mixed 1,3-butadiene were selectively hydrogenated over the supported copper catalysts on highly porous supports such as alumina, silica, etc. The preferred supports have the average pore diameter larger than about 200 .ANG., no micro pores,
6576588 Process for selective hydrogenation of alkynes and catalyst therefor June 10, 2003
Acetylenic compounds in olefin streams such as mixed 1,3-butadiene were selectively hydrogenated over the supported copper catalysts on highly porous supports such as alumina, silica, etc. The preferred supports have the average pore diameter larger than about 200 .ANG., no micro pores,
6392078 Process and catalyst for making dialkyl carbonates May 21, 2002
A process for producing dialkyl carbonates, such as dimethyl carbonate, from the reaction of a primary alcohol with urea in the presence of a catalyst which is a complex compound represented by R.sub.2 Sn(OCH.sub.3).sub.2..sub..chi. L, wherein R=C.sub.n H.sub.2n+1, n=1 to 12, .sub..c
5986157 Process for the removal of carbonyl compounds in isomerization feed streams November 16, 1999
Carbonyl compound contaminants are removed from hydrocarbon streams containing olefins for use, for example, in the process for the skeletal isomerization of olefins by pretreating the hydrocarbon stream by passing it over an acidic catalyst at elevated temperatures in the range of 1










 
 
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