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:
Dec. 28, 1982
Filed:
May. 06, 1981
Applicant:
Inventors:
Gunter Rauchschwalbe, Cologne, DE;
Heinz U Blank, Odenthal, DE;
Karl Mannes, Leverkusen, DE;
Dietmar Mayer, Leverkusen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260463 ; 549214 ; 549479 ; 549474 ; 549478 ; 549454 ; 542400 ; 542454 ; 542468 ; 546103 ; 546141 ; 546147 ; 546153 ; 546154 ; 546157 ; 546302 ; 549 23 ; 549 66 ; 549410 ; 549470 ; 548406 ; 548510 ;
Abstract
In a process for the preparation of an aromatic chloroformic acid ester by contacting a phenol and phosgene, the improvement wherein the reaction is carried out in a homogeneous liquid phase at a temperature of 60.degree. to 180.degree. C. in the presence of organic phosphorus compound of the formula