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:
Nov. 26, 1991
Filed:
Jan. 29, 1991
Applicant:
Inventor:
Erich Ruf, Essen-Haarzopf, DE;
Assignee:
T. Goldschmidt AG, Essen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
556105 ;
Abstract
A method is disclosed for the preparation of anhydrous tin-dicarboxylate-dihalide. Anydrous tin-(II)-halide is reacted with an excess amount of acetic acid anhydride at temperatures of about between 20.degree. to 100.degree. C. while passing oxygen through the reaction mixture or adding an oxygen yielding agent such as hydrogen peroxide. The tin-diacetate-dihalide thus formed is separated and is further reacted with aliphatic carboxylic acid having more than 4 carbon atoms or the corresponding acid anhydrides at the temperatures of 80.degree. to 150.degree. C. while the liberated acetic acid anhydride or acetic acid is removed by distillation.