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. 10, 2015
Filed:
Dec. 15, 2009
Michael Hill, Cologne, DE;
Werner Krause, Huerth, DE;
Martin Sicken, Cologne, DE;
Clariant Finance (BVI) Limited, Tortola, VG;
Abstract
A process for preparing ethylenedialkylphosphinic acids, ethylenedialkylphosphinic esters and ethylenedialkylphosphinic salts, wherein a) a phosphinic acid source (I) is reacted with olefins (IV) in the presence of a catalyst A to give an alkylphosphonous acid, its salt or ester (II), b) the resultant alkylphosphonous acid, its salt or ester (II) is reacted with an acetylenic compound (V) in the presence of a catalyst B, to give the ethylenedialkylphosphinic acid derivative (III), and the catalyst A comprises transition metals, transition-metal compounds and/or catalyst systems which are composed of a transition metal and/or a transition-metal compound and at least one ligand, and the catalyst B comprises peroxide-forming compounds, peroxo compounds and/or azo compounds.