1
J Yong Ryu, Gary R Gildert: Process for selective hydrogenation of alkynes and catalyst therefor. Catalytic Distillation Technologies, Kenneth H Johnson, June 10, 2003: US06576588 (29 worldwide citation)

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 Å, no micro pores, total pore ...


2
J Yong Ryu: Selective hydrogenation process and catalyst. Catalytic Distillation Technologies, Osha • Liang, November 23, 2010: US07838710 (24 worldwide citation)

A supported catalyst for selective hydrogenation of acetylenes comprising 3-15 wt. % Ni promoted with 0.005-0.2 Pd on a support. The catalyst is prepared by depositing nickel promoted with palladium on a support, containing one or more optional elements from copper, silver, Group IA (Li, Na, K, Rb, ...


3
J Yong Ryu, Abraham P Gelbein: Process and catalyst for making dialkyl carbonates. Catalytic Distillation Technologies, Kenneth H Johnson, May 21, 2002: US06392078 (22 worldwide citation)

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


4
J Yong Ryu, Abraham P Gelbein: Process for making dialkyl carbonates. Kenneth H Johnson, July 11, 2006: US07074951 (11 worldwide citation)

A process for the production of dialkyl carbonates from the reaction of alcohol, for example C1–C3 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 produce ammonium carbamate w ...


5
J Yong Ryu: Hydrogenation catalyst and hydrogenation process. Catalytic Distillation Technologies, Osha Liang, October 30, 2007: US07288686 (10 worldwide citation)

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 the catalyst ...


6
J Yong Ryu: Catalyst for making dialkyl carbonates. Catalytic Distillation Technologies, Kenneth H Johnson, January 4, 2000: US06010976 (10 worldwide citation)

A novel catalyst, which is a complex of organotin with a high boiling electron donor compound acting as solvent which includes bidentate ligands which form 1:1 bidentate and/or 1:2 monodentate adducts with R'.sub.2 SnX.sub.2 (X=Cl, R'O, R'COO or R'COS), R'.sub.3 SnX, R'.sub.2 SnO, Ph.sub.3-n R'SnX.s ...


7
J Yong Ryu: Process for continuous production of organic carbonates or organic carbamates and solid catalysts therefore. Catalytic Distillation Technologies, Osha Liang, December 14, 2010: US07851645 (9 worldwide citation)

Processes for the alcoholysis, inclusive of transesterification and/or disproportionation, of reactants are disclosed. The alcoholysis process may include feeding reactants and a trace amount of soluble organometallic compound to a reactor comprising a solid alcoholysis catalyst, wherein the soluble ...


8
J Yong Ryu, Abraham P Gelbein: Process for making diaryl carbonate. Catalytic Distillation Technologies, Osha Liang, October 30, 2007: US07288668 (9 worldwide citation)

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 length of the c ...


9
J Yong Ryu: Process for producing organic carbonates. Catalytic Distillation Technologies, Osha Liang, May 27, 2008: US07378540 (8 worldwide citation)

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 alkoxides of two t ...


10
J Yong Ryu, Hugh M Putman: Ni hydrogenation catalysts, manufacture and use. Catalytic Distillation Technologies, Kenneth H Johnson, April 4, 2006: US07022645 (7 worldwide citation)

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 following speci ...