Process for producing .alpha.,.beta.-unsaturated carboxylic acids or esters thereof
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsMasao Hashimoto, Tadatoshi Honda
Life of this patent
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Abstract
A process for producing an .alpha.,.beta.-unsaturated carboxylic acid or esters thereof which comprises bringing an .alpha.-hydroxycarboxylic acid amide into contact with a solid acid catalyst independently or along with water, or along with water and an aliphatic alcohol, or along with an aliphatic alcohol.
Claims16
A process for producing an .alpha.,.beta.-unsaturated carboxylic acid which consists essentially of contacting an .alpha.-hydroxycarboxylic acid amide having the formula:
- ##STR3## wherein R.sub.1 and R.sub.2 each is a member selected from the group consisting of hydrogen and an alkyl group, with the proviso that at least one of R.sub.1 and R.sub.2 is an alkyl group, with a solid acid catalyst consisting essentially of at least one phosphate of an element selected from group III(b), the lanthanide group and the actinide group of the periodic table, said contact being carried out independently or along with water vapor at a temperature between 150.degree. and 500.degree. C.
A process for producing an .alpha.,.beta.-unsaturated carboxylic acid ester which consists essentially of contacting an .alpha.-hydroxycarboxylic acid amide having the formula:
- ##STR4## wherein R.sub.1 and R.sub.2 each is a member selected from the group consisting of hydrogen and an alkyl group, with the proviso that at least one of R.sub.1 and R.sub.2 is an alkyl group, with a solid acid catalyst consisting essentially of at least one phosphate of an element selected from group III(b), the lanthanide group and the actinide group of the periodic table, said contact being arried out along with an aliphatic alcohol or along with an aliphatic alcohol and water vapor at a temperature between 150.degree. and 500.degree. C.
A process for producing an .alpha.,.beta.-saturated carboxylic acid ester which consists essentially of catalytically reacting an .alpha.-hydroxycarboxylic acid amide having the formula:
- ##STR5## wherein R.sub.1 and R.sub.2 each is a member selected from the group consisting of hydrogen and an alkyl group, with the proviso that at least one of R.sub.1 and R.sub.2 is an alkyl group, with a first solid acid catalyst consisting essentially of at least one phosphate of an element selected from group III(b), the lanthanide group and the actinide group of the periodic table, alone or along with water vapor at a temperature of between 150.degree. and 500.degree. C., and then catalytically reacting the resulting reaction mixture with a second solid acid catalyst consisting of at least one member selected from the group consisting of at least one phosphate of a metallic element of group III(a), group IV(b) and group VI(b) of the periodic table, an oxide of an element of group IV(b), and a compound oxide of silicon oxide and an oxide of an element of group III(a) or group IV(b), along with an aliphatic alcohol at a temperature between 150.degree. and 500.degree. C.
Composition comprising an .alpha.-hydroxycarboxylic acid amide having the formula:
- ##STR6## wherein R.sub.1 and R.sub.2 each is a member selected from the group consisting of hydrogen and an alkyl group, with the proviso that at least one of R.sub.1 and R.sub.2 is an alkyl group, with a first solid acid catalyst consisting essentially of at least one phosphate of an element selected from group III(b), the lanthanide group and the actinide group of the periodic table.
Dependencies are inferred from the claim text.