Process for producing epoxides

Details Process for producing epoxides Process for producing epoxides

2011-07-19

2011-07-19

Oh, Taylor Victor (Department: 1622)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C549S520000

Reexamination Certificate

active

07982061

ABSTRACT:
A process for producing epoxides, the process including: (a) feeding at least one aqueous alkali and at least one halohydrin to a reactive distillation column; (b) concurrently in the reactive distillation column: (i) reacting at least a portion of the halohydrin with the alkali to form an epoxide; and (ii) stripping water and the epoxide from a basic aqueous residue; (c) recovering the water and the epoxide from the reactive distillation column as an overheads fraction; and, (d) condensing and phase separating the overheads fraction at a temperature of 50° C. or less to form an organic overheads fraction including the epoxide and an aqueous overheads fraction including water.

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patent: 2173496 (1986-10-01), None
patent: 2173496 (1986-10-01), None
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English Patent Abstract of GB 2173496 from esp@cenet, published Oct. 15, 1986, 1 page.
English Patent Abstract of JP 06-025196 from Patent Abstracts of Japan, published Feb. 1, 1994, 2 pages.
Fan, William W. et al, Process for Producing Epoxides, U.S. Appl. No. 12/512,227, filed Jul. 30, 2009, Dow Internal Reference No. 67143-US-NP[1].
Fan, William W. et al, Process for Producing Epoxides, U.S. Appl. No. 12/508,465, filed Jul. 23, 2009, Dow Internal Reference No. 67145-US-NP.

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