Production of 1,2-bis(hydroxyphenyl)ethane-1,2-diols by electrol

Details Production of 1,2-bis(hydroxyphenyl)ethane-1,2-diols by electrol Production of 1,2-bis(hydroxyphenyl)ethane-1,2-diols by electrol

Filed on

1978-04-04

Date issued

1979-06-05

Examiner

Edmundson, F. C.

Patent Class

Chemistry: electrical and wave energy

SubClass

Processes and products

Other Related Categories

204 75, 204 77, C25B 310, C25B 1508

Type

Patent

Status

active

Patent number

041572866

Description

ABSTRACT:
The product 1,2-bis(hydroxyphenyl)ethane-1,2-diol of electrolytic reductive coupling of hydroxybenzaldehyde is recovered by maintaining the electrolyte solution at a pH at which the product diol 1,2-bis(hydroxyphenyl)ethane-1,2-diol, precipitates out leaving the hydroxybenzaldehyde in solution, and continuously or intermittently filtering to collect the product diol.

REFERENCES:
patent: 4087336 (1978-05-01), Wagenknecht
Shima, Coll. Sci. Kyoto Imp. Univ. [A]11, 407-418, (1928), Chemical Abstracts, vol. 23, p. 2371 (1929).

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