Method for processing residual fixing-baths

Details Method for processing residual fixing-baths Method for processing residual fixing-baths

1990-11-21

1992-12-22

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

210720, 210724, 210726, 430399, 430400, C02F 900

Patent

active

051731576

ABSTRACT:
A method for processing residual fixing-baths, whereby a residual fixing-bath after demetalization by means of sulfide or by means of electrolysis, is acidified with a mixture of nitric acid and sulphuric acid, and the precipitated sulphur is removed. A liquid suitable as a gas washing liquid for flue gases and/or liquid fertilizer component is also prepared by an integrated processing of two or three waste materials.

REFERENCES:
patent: 3627676 (1971-12-01), Eccles, Jr.
patent: 3728439 (1973-04-01), Urban
patent: 3832453 (1974-08-01), Slovonsky et al.
patent: 3869386 (1975-03-01), Izdebski
patent: 3896209 (1975-07-01), Fournier et al.
patent: 3901805 (1976-08-01), Stewart
patent: 4260491 (1981-04-01), Cassidy et al.
patent: 4755453 (1988-07-01), Kunda et al.
patent: 5000859 (1991-03-01), Suciu et al.
H. F. Mark et al: "Kirk-Othmer Encyclopedia of Chemical Technology," 3rd Edition, vol. 22, 1978.

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