Patent · US Active

Method for producing 1,6-hexanediol and caprolactone

US8471042B2 · kind B2 · utility

2Cited by

1References

27Claims

0Family size

Assignee

BASF SE

Inventors

Rolf Pinkos · Bad Dürkheim, DE
Daniel Breuninger · Frankenthal (Pfalz), DE
Gerd-Dieter Tebben · Mannheim, DE

Key dates

Filing date	Mar 31, 2010
Grant date	Jun 25, 2013
Priority date	—
Expiry date	Apr 20, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D313/04
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for preparing 1,6-hexanediol and caprolactone, preferably with at least 99.5% purity, which are especially virtually free of 1,4-cyclohexanediols, from a carboxylic acid mixture which is obtained as a by-product of the catalytic oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-comprising gases and by water extraction of the reaction mixture, by hydrogenating the carboxylic acid mixture, esterifying and hydrogenating a substream to hexanediol and cyclizing 6-hydroxycaproic ester, the 1,4-cyclohexanediols being removed either in the course of fractionation of the esterification mixture or last from the caprolactone.

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