Patent · US Expired

Purification of 1,4-butanediol

US4383895A · kind A · utility

7Cited by

6References

2Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Richard E. Ernst · Kennett Square, US
Donald C. Paul · Downers Grove, US

Key dates

Filing date	Sep 21, 1981
Grant date	May 17, 1983
Priority date	—
Expiry date	Sep 21, 2001

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C29/80
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Color-forming materials or their precursors present in crude 1,4-butanediol are reduced more efficiently by subjecting the crude 1,4-butanediol to distillation under conditions wherein substantially all the water present in the crude 1,4-butanediol is first removed and then the 1,4-butanediol with reduced water content is further distilled to remove the color-forming materials.

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