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. 18, 2001
Filed:
Apr. 10, 2000
Applicant:
Inventors:
Assignee:
Forschungszentrum Karlsruhe, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 2/7185 ; C07D / ;
U.S. Cl.
CPC ...
B01J 2/7185 ; C07D / ;
Abstract
The invention relates to the reaction of 1,3-butadiene and carbon dioxide. The invention aims at providing a catalyst for said reaction, which can be easily recovered and does not contaminate the final product. The invention also relates to a method for producing &dgr;-lactone. According to the invention, a phosphinoalkyl-functionalized polystyrene is used to produce such a catalyst. The catalyst can be obtained by reacting phosphinoalkyl-functionalized polystyrene with (&eegr;,-cyclopentadienyl) (&eegr;,-allyl)palladium. The catalyst is used in the method to produce &dgr;-lactone.