Continuous process for the preparation of acrylonitrile polymers

Details Continuous process for the preparation of acrylonitrile polymers Continuous process for the preparation of acrylonitrile polymers

1974-07-08

1976-10-19

Wong, Jr., Harry

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 47UA, 260 63UY, 260 793M, 526 65, 526173, 526225, 526227, 526321, C08F12044, C08F22044

Patent

active

039870189

ABSTRACT:
A continuous process for polymerizing acrylonitrile monomer or copolymerizing a mixture of acrylonitrile monomer and a further ethylenically unsaturated monomer copolymerizable therewith in an aqueous medium and in the presence of a catalytic redox system through a primary and a secondary polymerization step. The primary step is carried out in a plurality of independent distinct reaction zones connected in parallel and operated under similar conditions, in which the conversion of the monomer or mixture of monomers is maintained at a value not exceeding 70%. The secondary step is carried out in a single reaction zone connected in series with each of the primary zones. The conversion of the monomer or mixture of monomers in the secondary zone is maintained at a value not exceeding 80% with respect to the overall feed of monomer or mixture of monomers to the primary zones.

REFERENCES:
patent: 2475016 (1949-07-01), Johannes de Nie
patent: 2750357 (1956-06-01), Bredereck et al.
patent: 3065212 (1962-11-01), Milford et al.
patent: 3174954 (1965-03-01), Nakayama et al.
patent: 3479312 (1969-11-01), Fujii et al.
patent: 3635927 (1972-01-01), Johnston

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