| Patent Number |
Title Of Patent |
Date Issued |
| 6018076 |
Ester preparation |
January 25, 2000 |
| An olefin such as isobutylene is reacted with a carboxylic acid to produce the ester in the presence of an alkanol modifying agent effective to suppress olefin polymerization, at least part of the modifying agent being formed in situ by reaction of the olefin and water. |
| 5998672 |
Double metal cyanide catalysts |
December 7, 1999 |
| Double metal cyanide catalysts, prepared by drying a catalyst slurry by a non-agglomerative drying method such as spray drying or freeze drying, directly produces catalyst particles of fine particle size such that intensive grinding is not required. The catalysts thus produced are di |
| 5900384 |
Double metal cyanide catalysts |
May 4, 1999 |
| Double metal cyanide catalysts, prepared by drying a catalyst slurry by a non-agglomerative drying method such as spray drying or freeze drying, directly produces catalyst particles of fine particle size such that intensive grinding is not required. The catalysts thus produced are di |
| 5891818 |
Cyanide complex catalyst manufacturing process |
April 6, 1999 |
| In the preparation of double metal cyanide complex catalysts, higher catalyst yield and higher catalyst activity may be obtained by recirculating a stream of catalyst dispersion to the reactor head space in the form of a spray, and by directing this or another circulation loop stream |
| 5866714 |
Ester preparation |
February 2, 1999 |
| An olefin such as isobutylene is reacted with a carboxylic acid to produce the ester in the presence of an alkanol modifying agent effective to suppress olefin polymerization, at least part of the modifying agent being formed in situ by reaction of the olefin and water. |
| 5554796 |
Removal of primary and secondary hydroperoxide impurities from tertiary hydroperoxides |
September 10, 1996 |
| A process for the purification of tertiary alkyl hydroperoxide containing contaminating quantities of primary and secondary alkyl hydroperoxides by contacting the impure hydroperoxide mixture with anhydrous carboxylic acid derivative such as maleic anhydride and subsequently reacting the |
| 5493035 |
Propylene oxide purification |
February 20, 1996 |
| Activated carbon to be used in the removal of impurities from propylene oxide is first pre-wetted with a glycol such as propylene glycol; after bed deactivation, water containing a basic catalyst is added to hydrolyze propylene oxide and to form a non-hazardous slurry of carbon, propylen |
