Process for the production of malonic acid dinitrile and purific

Details Process for the production of malonic acid dinitrile and purific Process for the production of malonic acid dinitrile and purific

1971-04-26

1978-08-08

Brust, Joseph Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260465H, 203 38, C07C12000, C07C12122, B01D 334

Patent

active

041056884

ABSTRACT:
Malonic acid dinitrile is prepared by reacting acetonitrile and cyanogen chloride in the gaseous phase at temperatures from 740.degree. to 780.degree. C. Temperatures from 750.degree. to 760.degree. C. with molar ratios of 1:1 to 1:5 of cyanogen chloride to acetonitrile are preferred. The crude mixture containing malonic acid dinitrile may be purified by conversion of the principal impurities to easily separable compounds by a Diels-Alder or selective hydrogenation reaction.

REFERENCES:
patent: 2799697 (1957-07-01), Maxion
patent: 2809986 (1957-10-01), Flisik et al.
patent: 3206500 (1965-09-01), Puls et al.
patent: 3322814 (1967-05-01), Iappelli
patent: 3417126 (1968-12-01), Taguchi et al.
patent: 3541133 (1970-11-01), Johnson et al.
patent: 3616269 (1971-10-01), Aelony et al.
Holmes; Organic Reactions; vol. 2; 1948, pp. 64, 65, 74, 75.

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