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:
Oct. 08, 1991
Filed:
Jan. 31, 1991
Applicant:
Inventor:
Erich Ruf, Essen-Haarzopf, DE;
Assignee:
Th. Goldschmidt AG, Essen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
556102 ; 556 90 ; 556 95 ;
Abstract
A method is disclosed for the production of dialkyl-tin-dichlorides whose alkyl groups have 1 to 22 carbon atoms. Trialkyl-aluminum is slowly added to a solution of tin-diacetate-dichloride and tetrahydrofuran in the mole ratio of about 2:3. The aluminum-triacetate precipitating during the reaction is removed by filtration and the tetrahydrofuran used as solvent is removed by distillation.