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:
Apr. 03, 1990
Filed:
Mar. 07, 1989
Applicant:
Inventors:
Clemens Grambow, Seebruck, DE;
Ferdinand Beck, Trostberg, DE;
Assignee:
SKW Trostberg Aktiengesellschaft, Trostberg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564241 ;
Abstract
The present invention provides a process for obtaining guanidine hydrohalides from the by-product mixture obtained in the production of mercaptoalkylsilanes and consisting essentially of guanidine hydrohalide, ammonium halide, thiourea and silane compounds, wherein the by-product mixture is extracted with an aliphatic ketone containing up to 7 carbon atoms and the extract is separated from the residue containing the guanidine hydrohalide.