Aqueous alkali or alkaline treat and heat regeneration of NH.sub

Details Aqueous alkali or alkaline treat and heat regeneration of NH.sub Aqueous alkali or alkaline treat and heat regeneration of NH.sub

1977-11-29

1980-08-26

Konopka, P. E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

210 32, 210 38R, 210 40, 252411R, B01J 2938, B01J 2120, B01D 1506, B01J 109

Patent

active

042194415

ABSTRACT:
A method of regenerating zeolite by heating wherein zeolite having adsorbed (NH.sub.3 -N) in foul water has sodium hydroxide added thereto, the sodium hydroxide containing Na.sup.+ equivalent to NH.sub.4.sup.+ adsorbed to the zeolite, water is added until the total quantity of the zeolite is submerged, and the resultant zeolite is heated at 400.degree. C. for 30 minutes, whereby a regeneration rate of 90% is attained.

REFERENCES:
patent: 1074337 (1913-09-01), Wijnberg
patent: 1189896 (1916-07-01), Wijnberg
patent: 3723308 (1973-03-01), Breck
patent: 3960760 (1976-06-01), Sanga et al.
patent: 4122007 (1978-10-01), Yamamoto et al.

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