Process for the recovery of formaldehyde present in waste waters

Details Process for the recovery of formaldehyde present in waste waters Process for the recovery of formaldehyde present in waste waters

1976-06-03

1978-05-09

Ford, John M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C07D29502

Patent

active

040888185

ABSTRACT:
Formaldehyde present in a waste water containing lower carboxylic acids is recovered by reacting said waste water at 0.degree. to 90.degree. C. with the amount of ammonia required for converting said formaldehyde into hexamine and the latter is recovered in solid form by evaporating the resulting solution.
The solid hexamine thus recovered has a content in lower carboxylic acids not exceeding 0.05 wt.%, is practically free from other impurities and is suited for any conventional use.

REFERENCES:
patent: 3538199 (1970-11-01), Weiss et al.
patent: 3843643 (1974-10-01), Ackerman et al.
Meissner et al., Industrial & Engineering Chemistry, vol. 46, pp. 724-727, (1954).

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