Process for producing an azonitrile with improved color from an aminonitrile in an aqueous system comprising mixed surface active compounds
AssigneeE. I. Du Pont de Nemours and Company
InventorEarl Phillip Moore, Jr.
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Abstract
A process for the preparation of 2,2'-azobis(isobutyronitrile) of improved color which comprises reacting 2-amino-2-methylpropionitrile with a metal hypochlorite, M(OCl).sub.x where M is selected from sodium, potassium or calcium and x is the valence of M, in the presence of water and a mixture of a quaternary ammonium surface active compound with either a nonionic or amphoteric surface active compound, said mixture having an HLB of about 8 to about 35 at a temperature of about -10.degree. C to about 30.degree. C and recovering the self-precipitated 2,2'-azobis(isobutyronitrile) from the reaction mixture.
Claims13
A process for the preparation of 2,2'-azobis(isobutyronitrile) of improved color comprising
- reacting 2-amino-2-methylpropionitrile with a metal hypochlorite, M(OCl).sub.x where M is selected from sodium, potassium or calcium and x is the valence of M, in an aqueous medium having an initial concentration of 5 to 15% by weight metal hypochlorite in the presence of 0.25 to 10% by weight, based on the weight of said aminonitrile, of a mixture of a quaternary ammonium surface active compound with a compound selected from a nonionic and amphoteric surface active compound said mixture having and HLB of about 8 to about 35 at a temperature of about -10.degree. C to about 30.degree. C said metal hypochlorite and aminonitrile being present in an equivalent ratio of from 1:1 to 2:1 of hypochlorite to aminonitrile and recovering the self-precipitated 2,2'azobis(isobutyronitrile) from the reaction mixture without the use of a precipitating agent.
Dependencies are inferred from the claim text.