The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 30, 2003
Filed:
Aug. 28, 2002
Applicant:
Inventors:
Kayoko Sugiyama, Kawasaki, JP;
Shigeru Ikai, Kashima-gun, JP;
Assignee:
Asahi Glass Company, Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B01J 2/726 ;
U.S. Cl.
CPC ...
B01J 2/726 ;
Abstract
A process for producing a double metal cyanide complex catalyst for ring opening polymerization of alkylene oxide, which comprises subjecting a substantially crystalline double metal cyanide compound to a contact treatment by heating at from 45 to 125° C. with an aqueous solution containing an organic ligand and a metal salt, and then separating the resulting solid from the obtained slurry.