Process for producing a high purity dibromoneopentyl glycol prod

Details Process for producing a high purity dibromoneopentyl glycol prod Process for producing a high purity dibromoneopentyl glycol prod

1988-10-12

1990-04-03

Locker, Howard J.

Compositions

Fire retarding

For solid synthetic polymer and reactants thereof

252601, 560197, 560264, 568844, C09K 2100, C07C 3134, C07C 6934, C07C 6952

Patent

active

049138480

ABSTRACT:
This invention relates to a process for treating a first product which contains monobromopentaerythritol, dibromoneopentyl glycol and tribromoneopentyl alcohol to yield a second product having a dibromoneopentyl glycol content, on a weight percent basis, greater than that of the first product. The process features forming a stirrable mass from the first product and a solvent system in which, at a temperature within the range of from about 0.degree. C. to about 40.degree. C., the monobromopentaerythritol and the tribromoneopentyl alcohol are more soluble than the dibromoneopentyl glycol and in which at least 85% of the dibromoneopentyl glycol in the mass is insoluble; maintaining the reaction mass within the aforementioned temperature range to realize an insoluble portion and a solvent and solute portion; and separating the insoluble portion and the solvent and solute portion without substantial precipitation of the solute from the solvent and solute portion. The separated insoluble portion is the second product.

REFERENCES:
patent: 3876509 (1975-04-01), Davis et al.
patent: 3883581 (1975-05-01), Davis et al.
patent: 3891605 (1975-06-01), Larsen et al.
patent: 3932541 (1976-01-01), Davis et al.
patent: 4154966 (1979-05-01), Weil
patent: 4378440 (1983-03-01), Bertrand
patent: 4699943 (1987-10-01), Bertrand

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