Conversion of CS (tear gas) to o-chlorostyrene and ammonium sulf

Details Conversion of CS (tear gas) to o-chlorostyrene and ammonium sulf Conversion of CS (tear gas) to o-chlorostyrene and ammonium sulf

1980-04-28

1981-08-18

Gantz, Delbert E.

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

Organic compounds

Halogen containing

423545, 423549, 562495, C07C 2500

Patent

active

042848326

ABSTRACT:
Tear gas or CS (o-Chlorobenzalmalononitrile) has two nitrile functional gps which, when removed, effects the chemical conversion of bulk CS to o-chlorostyrene. This involves a first step, an acid or base catalyzed hydrolysis of CS to o-chlorocinnamic acid. Thereafter a second reaction is the decarboxylation of the intermediate product to give o-chlorostyrene.
CS is reacted with 70% sulfuric acid at 120.degree. C., producing ammonium sulfate and orth-ochlorocinnamic acid (the intermediate product). This intermediate product is separated and thermally decarboxylated at 270.degree. C. (with a catalytic amount of soda lime and copper powder) to ortho-chlorostyrene.

REFERENCES:
patent: 2824144 (1958-02-01), Beets et al.
patent: 3898292 (1975-08-01), Diamond
patent: 3912784 (1975-10-01), Suzuki
patent: 4012454 (1977-03-01), Fields

Affiliated with

Also associated with

Rating

Conversion of CS (tear gas) to o-chlorostyrene and ammonium sulf does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Conversion of CS (tear gas) to o-chlorostyrene and ammonium sulf, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Conversion of CS (tear gas) to o-chlorostyrene and ammonium sulf will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-38833