Process for recovering waste heat from formaldehyde product gas

Details Process for recovering waste heat from formaldehyde product gas Process for recovering waste heat from formaldehyde product gas

1986-11-25

1987-09-01

Kittle, John E.

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

Organic compounds

Oxygen containing

568471, 568493, C07C 47052

Patent

active

046910603

ABSTRACT:
Waste heat possessed by a hot formaldehyde product gas obtained by catalytic reaction of methanol with air is heat exchanged with pressurized water in a waste heat boiler, thereby generating steam, and then leading the product gas to a formaldehyde absorption column, thereby absorbing formaldehyde, into an aqueous solution, and heat exchanging a recycling solution for a feed gas humidifier with the aqueous solution withdrawn from the bottom of absorption column. The waste heat can be efficiently recovered without deposition of paraformaldehyde on the heat transfer surface of heat exchanger and the amount of additional steam can be reduced or made entirely zero.

REFERENCES:
patent: 3151960 (1964-10-01), Roois
patent: 4358623 (1982-11-01), Murphy et al.
patent: 4450301 (1984-05-01), McMillan et al.

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