Method and composition for inhibiting acrylonitrile polymerizati

Details Method and composition for inhibiting acrylonitrile polymerizati Method and composition for inhibiting acrylonitrile polymerizati

1986-10-23

1988-01-19

Brust, Joseph Paul

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

Organic compounds

Nitriles

C07C12132

Patent

active

047205660

ABSTRACT:
This invention relates to compositions and methods of inhibiting acrylonitrile polymerization, particularly in quench columns of systems producing acrylonitrile, comprising adding to the acrylonitrile an effective amount for the purpose of (a) a hydroxylamine having the formula ##STR1## 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 ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are the same or different and are hydrogen, alkyl, aryl, alkaryl, or aralkyl groups with the proviso that at least one of R.sup.1, R.sup.2, R.sup.3 or R.sup.4 is hydrogen.

REFERENCES:
patent: 2758131 (1956-08-01), Couvillon
patent: 3428666 (1969-02-01), Schneider et al.
patent: 3689558 (1972-09-01), Modeen et al.
patent: 4267365 (1981-05-01), Findeisen
patent: 4673489 (1987-06-01), Roling
The Merck Index, 10th Ed., (1983), p. 6423.

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