Patent · US Active

Process for producing epoxides

US7985867B2 · kind B2 · utility

2Cited by

2References

18Claims

0Family size

Assignee

DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

William W. Fan · Lake Jackson, US
Christian D. Kneupper · Brazoria, US
Sascha Noormann · Eberbach, DE
Renate Patrascu · Stade, DE

Key dates

Filing date	Jul 23, 2009
Grant date	Jul 26, 2011
Priority date	—
Expiry date	Jul 23, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/10
WIPO fieldChemical engineering
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.