Process for preparing ring halogenated styrenes

Details Process for preparing ring halogenated styrenes Process for preparing ring halogenated styrenes

1979-05-24

1981-09-29

Davis, Curtis R.

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

Organic compounds

Halogen containing

585435, 585436, C07C 2514

Patent

active

042924537

ABSTRACT:
The present invention relates to the production of ring-halogenated styrene monomers of high purity. These are of value in the production of polymers which possess flame retardance. The process of the invention comprises reacting heterogenously ring halogenated beta-bromoethyl benzene with a strong aqueous alkali base in the presence of a quaternary phase transfer catalyst until substantially all the bromoethyl benzene has undergone reaction, separating the phases, washing and neutralizing the organic phase and recovering the ring-halogenated styrene monomer, which is the desired product.

REFERENCES:
patent: 1870877 (1932-08-01), Smith et al.
patent: 3542888 (1970-11-01), d'Ostrowick et al.
patent: 3981937 (1976-09-01), Campbell et al.

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