Liquid purification or separation – Processes – Chemical treatment
Patent
1986-12-29
1989-02-14
Hruskoci, Peter
Liquid purification or separation
Processes
Chemical treatment
210763, 210909, 210917, C02F 172
Patent
active
048044806
ABSTRACT:
The present invention relates to a process for destroying polynitrophenols or their salts in an aqueous waste by treating with at least two moles of hydrogen peroxide per mole of polynitrophenol in the presence of from 0.002 to 0.7 moles of an iron salt per mole of polynitrophenol. The destruction takes place at a pH lower than 4 and a temperature greater than 65.degree. C.
REFERENCES:
patent: 3637761 (1972-01-01), Kuwata et al.
patent: 4294703 (1981-10-01), Wilms et al.
patent: 4370241 (1983-01-01), Junkermann et al.
patent: 4604214 (1986-08-01), Carr et al.
patent: 4623465 (1986-11-01), Klibanou
patent: 4708703 (1987-10-01), Bockrath et al.
Edward J. Keating, Richman A. Brown and Edward S. Greenberg, "Phenolic Problems Solved with Hydrogen Peroxide Oxidation", Dec. 1978, Industrial Water Engineering, pp. 22-27.
William G. Strunk, "Hydrogen Peroxide Treats Diverse Wastewaters", Jan./Feb. 1979, Industrial Wastes, pp. 32-34.
E. I. Du Pont de Nemours and Company
Evans Craig H.
Hruskoci Peter
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