Isolation of partially brominated diphenyl ether mixtures in cry

Details Isolation of partially brominated diphenyl ether mixtures in cry Isolation of partially brominated diphenyl ether mixtures in cry

1994-01-27

1994-10-04

Richter, Johann

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

Organic compounds

Oxygen containing

568627, C07C 4118, C07C 4134

Patent

active

053528441

ABSTRACT:
This invention relates to a process for isolation of partially brominated diphenyl ether mixtures ("Octabrom") having an average bromine content of 7.2-8.5. The process comprises: (i) adding a C.sub.1 -C.sub.4 alkanol to the Octabrom in solution in an organic solvent; (ii) maintaining the contact of the alkanol with Octabrom in the organic solvent for that period of time which is sufficient to allow the Octabrom to precipitate in crystalline form, making a slurry; and (iii) recovering the final Octabrom from the slurry.

REFERENCES:
patent: 3833674 (1974-09-01), Brackenridge
patent: 3959387 (1976-05-01), Brackenridge
patent: 5000879 (1991-03-01), Moore, Jr. et al.
patent: 5081316 (1992-01-01), Hussain

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