Process for reducing the phenol content in phenol-containing wat

Details Process for reducing the phenol content in phenol-containing wat Process for reducing the phenol content in phenol-containing wat

1988-04-08

1989-08-15

Hruskoci, Peter

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210729, 210737, 210909, 528147, C02F 152

Patent

active

048572071

ABSTRACT:
A process for the purification of phenol-containing waters, in particular waste waters from phenolic resin production, where the term "phenol" is taken to mean all steam-volatile benzene derivatives according to DIN 38,409 H 16, by reaction of the phenol with formaldehyde in an alkaline environment at 50.degree. to 100.degree. C. to form those phenolformaldehyde condensates which, by subsequent acidification of the waste water, precipitate in filterable, granular and no longer sticky form and can be separated.

REFERENCES:
patent: 1187229 (1916-06-01), Baekeland
patent: 3869387 (1975-03-01), Vargiu et al.
patent: 4198499 (1980-04-01), Konii
patent: 4216088 (1980-08-01), Juferov et al.
patent: 4454298 (1984-06-01), Koyama et al.

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