Process for preparing 1,3-dibromoacetone,...

Details Process for preparing 1,3-dibromoacetone,... Process for preparing 1,3-dibromoacetone,...

2005-05-17

2008-11-25

Witherspoon, Sikarl A (Department: 1621)

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

Organic compounds

Oxygen containing

C568S393000, C568S411000, C549S518000

Reexamination Certificate

active

07456322

ABSTRACT:
A process for preparing 1,3-dibromoacetone, 1-3-dichloroacetone and epichlorohydrin which comprises: (a) re-acting acetone with 2 moles of bromine to make a mixture of brominated acetone derivatives and byproduct hydrogen bromide; (b) equilibrating the mixture of brominated acetone derivatives and hydrogen bromide to produce 1,3-dibromoacetone as the major product; (c) crystallizing the 1,3-dibromoacetone; and (d) isolating the 1,3-dibromoacetone. The process may further include the steps of (e) reacting the 1,3-dibromoacetone with a chloride source to produce 1,3-dichloroacetone; (f) hydrogenating the isolated 1,3-dichloroacetone to produce 1,3-dichlorohydrin; and (g) cyclizing the 1,3-dichlorohydrin with a base to produce epichlorohydrin.

REFERENCES:
patent: 4024193 (1977-05-01), Kruse
patent: 4251467 (1981-02-01), Kurkov
patent: 5997716 (1999-12-01), Roberts et al.
patent: 63017874 (1988-01-01), None
patent: 9104648 (1995-10-01), None
patent: 63-297333 (1998-12-01), None
patent: 176853 (1994-06-01), None
patent: 108962 (1994-10-01), None
patent: 1567568 (1990-05-01), None
patent: WO 03064357 (2003-08-01), None
Rodygin et al. Selective Monobromination of Ketones by Bis(Dimethylacetamide) Hydrogen Tribomide. Russian Journal of Organic Chemistry, 1994, vol. 30 (6), pp. 881-887.
Schubert, et al, Chemtech, Apr. 1993, pp. 37-41.

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