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:
Sep. 09, 2008
Filed:
Jan. 21, 2005
Steffen Krill, Speyer, DE;
Friedel Schultheis, Hasselroth, DE;
Udo Gropp, Heppenheim, DE;
Matthias Groemping, Kenner, LA (US);
Steffen Krill, Speyer, DE;
Friedel Schultheis, Hasselroth, DE;
Udo Gropp, Heppenheim, DE;
Matthias Groemping, Kenner, LA (US);
Roehm GmbH & Co. KG, Darmstadt, DE;
Abstract
The invention relates to a process for the selective, economically viable preparation of methacrylic acid and methacrylic esters starting from acetone cyanohydrin, wherein, in a first step, 2-hydroxy-2-methylpropionic acid is prepared by reacting acetone cyanohydrin with sulphuric acid in the presence of water and a suitable polar solvent and is isolated and methacrylic acid is subsequently prepared by β-elimination of water starting from 2-hydroxy-2-methylpropionic acid.