Water → Gamma-Butyrolactone

The crude product stream 21 comprising 1,4-butanediol, tetrahydrofuran, γ-butyrolactone, alkanol and water which is produced in the hydrogenation stage is fed to a first distillation stage 23. In the first distillation stage 23, the crude product stream 21, the stream comprising tetrahydrofuran and alkanol and also high boilers, is separated into a bottom stream 25 comprising high boilers and an overhead stream 27 comprising tetrahydrofuran and alkanol as azeotrope. The high boiler-comprising bottom stream 25, which comprises 1,4-butanediol, γ-butyrolactone, alkanol and water, is fed to a high boiler work-up 29 in which this stream is separated into γ-butyrolactone 31, 1,4-butanediol 33 and alkanol and water 35.

ORD record

ord-af5866ab250a45e986be64aa126ab96d

Source dataset

uspto-grants-2015_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09186599B2