Treatment of a formaldehyde-containing waste stream

Details Treatment of a formaldehyde-containing waste stream Treatment of a formaldehyde-containing waste stream

1996-09-23

1998-03-03

McCarthy, Neil

Liquid purification or separation

Processes

Chemical treatment

210749, 210908, 562 17, C02F 172

Patent

active

057230498

ABSTRACT:
A process is provided for selectively converting formaldehyde in an acidic organic waste aqueous stream in the most part to formose sugars rather than to alkali metal formate and methanol by reacting the stream with a strong alkali base to provide a pH of at least about 8.5 and heating the resulting basic solution to a temperature of at least about 80.degree. C. The formaldehyde is present in the waste stream in amounts between about 1000 ppm to 10,000 ppm.

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patent: 4338196 (1982-07-01), Mayerle
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patent: 4724103 (1988-02-01), Gentilcore
patent: 5108621 (1992-04-01), Robins
patent: 5244581 (1993-09-01), Murphy
T. Mizuno et al--Nippon Nogel Kagaku Kaishi 44(7): 324-331 (1970).

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