| Patent Number |
Title Of Patent |
Date Issued |
| 6329537 |
Tellurium-containing molecular sieves |
December 11, 2001 |
| Zeolites containing silicon, titanium and tellurium oxides are prepared by a hydrothermal method which yields materials containing exceptionally high levels of catalytically active Ti species. Following calcination, the molecular sieves are active and selective catalysts for the epoxidat |
| 6063897 |
Acid-treated double metal cyanide complex catalysts |
May 16, 2000 |
| The amount of high molecular weight impurity present in a polyether polyol produced by alkoxylation of an active hydrogen-containing initiator and a substantially noncrystalline highly active double metal cyanide complex catalyst may be advantageously lowered by treating the catalyst pri |
| 6051680 |
Silylated double metal cyanide complex catalysts |
April 18, 2000 |
| The amount of high molecular weight impurity present in a polyether polyol produced by alkoxylation of an active hydrogen-containing initiator using a double metal cyanide complex catalyst may be advantageously lowered by treating the catalyst prior to use in polymerization with a silyla |
| 6042807 |
Tellurium-containing molecular sieves |
March 28, 2000 |
| Zeolites containing silicon, titanium and tellurium oxides are prepared by a hydrothermal method which yields materials containing exceptionally high levels of catalytically active Ti species. Following calcination, the molecular sieves are active and selective catalysts for the epoxidat |
| 6013596 |
Double metal cyanide catalysts containing cyclic, bidentate complexing agents |
January 11, 2000 |
| Double metal cyanide (DMC) catalysts and methods for making them are disclosed. The catalysts comprise a DMC compound, an organic complexing agent, and optionally, a functionalized polymer. The key component is the complexing agent, which comprises a C.sub.3 -C.sub.5 aliphatic alcohol a |
| 5977009 |
Catalyst compositions derived from titanium-containing molecule sieves |
November 2, 1999 |
| Useful catalyst compositions are produced by treating substituted molecular sieves with reactive titanium compounds such as titanium tetrahalides, preferably in the vapor phase at elevated temperatures. The molecular sieve starting materials contain tellurium, boron or germanium oxides i |
| 5686645 |
Synthesis of isocyanate precursors from primary formamides |
November 11, 1997 |
| A selective process for the production of unsymmetric carbamates and ureas is disclosed. In the process, a primary formamide is reacted with a dialkyl amine or an alcohol in the presence of a Group VIII transition metal catalyst. The unsymmetric carbamates and ureas are useful precursors |
| 5600033 |
Epoxide isomerization catalysts |
February 4, 1997 |
| Improved catalysts for isomerizing epoxides to allylic alcohols are disclosed. The catalysts contain lithium phosphate supported on high-purity silica. The use of high-purity silica as a support results in improved epoxide conversion and allylic alcohol selectivity, and reduced by-pr |
| 5488176 |
Preparation of dialkyl peroxides |
January 30, 1996 |
| The present invention provides a process for the production of dialkyl peroxides by selective reaction of an alcohol and/or an olefin with a hydrogen peroxide at 70.degree.-110.degree. C. using an inorganic heteropoly and/or isopoly acid catalyst. |
| 5455215 |
Epoxide isomerization catalysts |
October 3, 1995 |
| Improved catalysts for isomerizing epoxides to allylic alcohols are disclosed. The catalysts contain lithium phosphate supported on high-purity silica. The use of high-purity silica as a support results in improved epoxide conversion and allylic alcohol selectivity, and reduced by-pr |
| 5420357 |
Preparation of dialkyl peroxides |
May 30, 1995 |
| The present invention provides a process for the production of dialkyl peroxides by reaction of an alcohol and/or an olefin with an organic hydroperoxide, using a solid acidic zeolite catalyst. |
| 5312998 |
Integrated process for the production of ditertiary butyl peroxide |
May 17, 1994 |
| An integrate process is provided for the production of ditertiary butyl peroxide wherein isobutane oxidate containing tertiary butyl alcohol and tertiary butyl hydroperoxide is reacted in the presence of an aqueous acidic catalyst, the reaction mixture is phase separated, the aqueous |
| 5312995 |
Process for isomerizing epoxides to aldehydes |
May 17, 1994 |
| A process for isomerizing epoxides to aldehydes is disclosed. The process uses a metal-exchanged zeolite catalyst wherein the zeolite contains an alkali metal and one or more second exchangeable metals from Group IIA, IB, IIB, or IIIB. The catalysts are easily made by combining alkali |
| 5292974 |
Alkylene oxide isomerization process and catalyst |
March 8, 1994 |
| An improved alkylene oxide isomerization catalyst and process are disclosed. The catalyst comprises lithium phosphate and a neutral inorganic support. A key feature of the invention is that the lithium phosphate is distributed homogeneously and principally on the surface of the suppo |
| 5288919 |
Preparation of dialkyl peroxides |
February 22, 1994 |
| The present invention provides a process for the production of dialkyl peroxides by reaction of an alcohol and/or an olefin with an organic hydroperoxide, using an inorganic heteropoly and/or isopoly acid catalyst. |
| 5262371 |
Alkylene oxide isomerization process and catalyst |
November 16, 1993 |
| An improved alkylene oxide isomerization catalyst and process are disclosed. The catalyst comprises lithium phosphate and a neutral inorganic support. A key feature of the invention is that the lithium phosphate is distributed homogeneously and principally on the surface of the suppo |
| 5155267 |
Synthesis of isocyanate precursors from primary formamides |
October 13, 1992 |
| A selective process for the production of unsymmetric carbamates and ureas is disclosed. In the process, a primary formamide is reacted with a dialkyl amine or an alcohol in the presence of a Group VIII transition metal catalyst. The unsymmetric carbamates and ureas are useful precursors |
| 5126476 |
Process for the preparation of aryl-, heteroaryl-, or cycloalkyl-substituted alkyl urethanes and |
June 30, 1992 |
| A process for making aryl-, heteroaryl-, or cycloalkyl-substituted alkyl urethanes is disclosed. The urethanes are prepared by electrophilic carbamylation of aromatic compounds with alkylene bis(carbamic acid esters) or the equivalent in the presence of an acidic catalyst and a polar |
