Method and composition for inhibiting acrylonitrile...

Details Method and composition for inhibiting acrylonitrile... Method and composition for inhibiting acrylonitrile...

C - Chemistry, Metallurgy

07

C

260/558.01

C07C 253/32 (2006.01) C07C 255/08 (2006.01)

Patent

CA 1299585

ABSTRACT This invention relates to compositions and methods of in- hibiting acrylonitrile polymerization, particularly in quench columns of systems producing acrylonitrile, comprising adding to the acrylo- nitrile an effective amount for the purpose of (a) a hydroxylamine having the formula Image wherein R and R' are the same or different and are hydrogen, alkyl, aryl, alkaryl or aralkyl groups, and (b) a para-phenylenediamine or derivative thereof having at least one N-H group. Preferably the phenylenediamine is a para-phenylenediamine having the formula Image wherein R1, R2, R3 and R4 are the same or different and are hydro- gen, alkyl, aryl, alkaryl, or aralkyl groups with the proviso that at least one of R1, R2, R3 or R4 is hydrogen.

542512

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