Process for producing unsaturated carboxylic acids

Details Process for producing unsaturated carboxylic acids Process for producing unsaturated carboxylic acids

1989-02-23

1990-08-21

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562526, 560215, 564129, 564130, 564131, C07C 5702

Patent

active

049507885

ABSTRACT:
Acrylic acid or other unsaturated carboxylic acid is made by hydrolysing the corresponding nitrile in the presence of excess sulphuric acid to form amide sulphate, adding amide in an amount such that the total amount of amide and nitrile fed to the process is greater than 1 mole per mole sulphuric acid, hydrolysing the amide sulphate and amide to the desired acid and separating the acid from the sulphate by-products.

REFERENCES:
patent: 2890101 (1959-06-01), Borrel
patent: 3956387 (1976-05-01), Dockner
CA 86:71925A, 1976.
CA 99:71293C, 1981.
CA 91:158321U, 1979.
CA 83:79933B, 1974.
CA 44010W, 1975.
CA 72:89793T, 1970.
CA 55:2485G, 1959.
CA 92:93905K, 1979.
CA 87:185002Q, 1977.
CA 86:89183H, 1976.

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