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:
Jan. 25, 2005
Filed:
Jul. 23, 2003
Applicants:
Oliver Schumacher, Werne, DE;
Liane Franke, Datteln, DE;
Inventors:
Oliver Schumacher, Werne, DE;
Liane Franke, Datteln, DE;
Assignee:
Crompton GmbH, Bergkamen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 722 ;
U.S. Cl.
CPC ...
Abstract
The invention relates to a process for the direct preparation of mixtures of monoalkyltin trichlorides RSnCland dialkyltin dichlorides RSnClin one reaction step by partial alkylation of tin tetrachloride using alkylaluminum compounds in the form of their ether donor complexes, wherein an amount of ether greater than that required for stoichiometric formation of the donor complex is used in the reaction.