Back to results
US 4,987,256 AGranted
Process for production of .alpha.-hydroxycarboxylic acid amide
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsShuji Ebata, Hiroyuki Hirayama, Takako Uchiyama
Life of this patent
Estimating the term…
Abstract
Process for production of .alpha.-hydroxycarboxylic acid amide of the general formula (A), comprising hydrating cyanhydrin of the general formula (B) by the use of a modified manganese dioxide catalyst containing one or more of zirconium, vanadium, and tin, and an alkali metal element. ##STR1## wherein all the symbols are as defined in the appended claims.
Claims11
A process for producing .alpha.-hydroxycarboxylic acid amide represented by the general formula (A):
- ##STR5## (wherein R.sup.1 is a hydrogen, or an aliphatic hydrocarbon group having 1 to 10 carbon atoms, and R.sup.2 is an aliphatic, alicyclic or aromatic hydrocarbon group having 1 to 10 carbon atoms) from cyanhydrin represented by the general formula (B):
- ##STR6## (wherein R.sup.1 and R.sup.2 are the same as defined above), which process comprises hydrating the cyanhydrin of the general formula (B) by the use of a modified manganese dioxide catalyst containing at least one element selected from zirconium, vanadium, and tin, and containing an alkali metal.
Dependencies are inferred from the claim text.