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. 16, 2001
Filed:
Mar. 05, 1998
Georg Heinrich Grosch, Bad Dürkheim, DE;
Harald Larbig, Ludwigshafen, DE;
Dieter Junge, Frankenthal, DE;
Daniella Geelen, Schoten, DE;
Peter de Vocht, Emblem, DE;
Gerd Hoeppner, Schwarzheide, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for preparing double metal cyanide catalysts, comprising combining an aqueous solution of a metal salt of the formula M,(X),, with an aqueous solution of a cyanometallic acid of the formula H,M,(CN),(A),, where one or both aqueous solutions may comprises at least one water-miscible organic ligand selected from the group consisting of alcohols, aldehydes, ketones, ethers, polyethers, esters, ureas, amides, nitrites or sulfides, if desired, combining the aqueous suspension thus obtained with at least one water-miscible organic ligand selected from the above-mentioned group, which ligand may be identical to or different from any previously added ligand, and separating the resulting two-metal cyanide complex from the suspension.