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:
Feb. 02, 2010
Filed:
Oct. 28, 2005
Peter Wasserscheid, Erlangen, DE;
Roy Van Hal, Shinveld, NL;
Claus Hilgers, Köln, DE;
Merck Patent GmbH, Darmstadt, DE;
Abstract
The invention relates to a process for the preparation of ionic liquids of general formula (cation)(R'—O—SO). The process includes the step of treating the compound of formula (cation)(R—O—SO) with an alcohol, or mixture of different alcohols, of the formula R′—OH optionally in the presence of a catalyst to form the desired ionic liquid and the by-product R—OH, which is optionally removed during the reaction or after completion of the reaction. The compound of formula (cation)(R—O—SO) can be prepared by alkylating a tertiary or aromatic amine with a dialkylsulfate.