Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2008-09-09
2008-09-09
Eyler, Yvonne (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S599000
Reexamination Certificate
active
10589123
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.
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Groemping Matthias
Gropp Udo
Krill Steffen
Schultheis Friedel
Eyler Yvonne
Roehm GmbH & Co. KG
Valenrod Yevegeny
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