Process for producing epoxides

Details Process for producing epoxides Process for producing epoxides

2011-07-26

2011-07-26

Oh, Taylor Victor (Department: 1622)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C549S521000, C203S037000, C203S038000

Reexamination Certificate

active

07985867

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, wherein the reactive distillation column includes a feed zone, a top zone disposed above the feed zone, and a bottom zone disposed below the feed zone; (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; (d) condensing and phase separating the overheads fraction to form an organic overheads fraction including the epoxide and an aqueous overheads fraction including water; and (e) maintaining a liquid holdup per plate in the feed zone at a residence time of 10 seconds or less.

REFERENCES:
patent: 4634784 (1987-01-01), Nagato et al.
patent: 5532389 (1996-07-01), Trent et al.
patent: 2008/0015370 (2008-01-01), Hook et al.
patent: 2173496 (1986-10-01), None
patent: 2173496 (1986-10-01), None
patent: 1994-025196 (1991-10-01), None
patent: 6025196 (1994-02-01), None
patent: 72086 (1981-11-01), None
patent: 108962 (1994-10-01), None
Huang et al., AIChE Journal, 52(7), 2518-2534, Apr. 26, 2006.
Fan, William W. et al, Process for Producing Epoxides, Provisional 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, Provisional U.S. Appl. No. 12/508,435, filed Jul. 23, 2009, Dow Internal Reference No. 67144-US-NP.
Defta, P. et al, Production of Epichlorohydrin—From Propylene Di:Chlorohydrin(s) in Solution and Calcium Hydroxide Suspension, Romanian Patent No. RO108962, Oct. 31, 1994, Derwent World Patent Database (English Abstract).
Niculescu, George et al, Apparatus and Methods for Producing Epichlorohydrin, Romanian Patent No. RO72086, Nov. 24, 1981, Chemical Abstracts Database (English Abstract).
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 Jan. 2, 1994, 2 pages.

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