Patent · US Active

Succinic anhydride from ethylene oxide

US9156803B2 · kind B2 · utility

44Cited by

5References

39Claims

0Family size

Assignee

Novomer, Inc. · US

Inventors

Scott D. Allen · Ithaca, US
Bernard D. Dombek · Charleston, US
Olan S. Fruchey · Port Aransas, US
Nye A. Clinton · Hurricane, US

Key dates

Filing date	Aug 25, 2011
Grant date	Oct 13, 2015
Priority date	—
Expiry date	Aug 25, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/584
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Continuous flow systems and methods produce succinic anhydride by a double carbonylation of ethylene oxide with carbon monoxide and at least one catalyst. In some embodiments, the double carbonylation occurs using a single catalyst. In other embodiments, a first catalyst is used to promote the first carbonylation, and a second catalyst different from the first catalyst is used to promote the second carbonylation. The succinic anhydride is isolated from the product stream by crystallization and the catalyst is recycled to the reaction stream.

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