Processing method or photographic processing waste liquor

Details Processing method or photographic processing waste liquor Processing method or photographic processing waste liquor

1990-03-20

1991-10-15

Manoharan, Virginia

Distillation: processes, separatory

With measuring, testing or inspecting

Of concentration

73 232, 159 473, 203DIG7, 203DIG18, 422 5, 422705, 436 55, 436121, B01D 334, B01D 342

Patent

active

050571915

ABSTRACT:
A disposal device for photographic processing waste liquor which concentrates the photographic process waste liquor by evaporation. The disposal device has a gas detecting device for detecting gas which may be generated during the evaporation of the waste liquor and a control device for stopping the evaporation based on the detection of a concentration of a specific gas. The processing method for photographic waste liquor involves evaporating the waste liquor to concentrate it and detecting gases which are generated during the evaporation process. When the concentration of a specific gas reaches a certain level, the evaporation step is halted.

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Patent Abstracts of Japan, vol. 11, No. 335 (P-632) [2782], 4th Nov. 1987, p. 68 P 632; & JP-A-62 118 348 (Konishiroku Photo Ind. Co., Ltd), 29-05-1987.
ISA Transactions, vol. 12, No. 1, 1973, pp. 70-77; R. Villalobos et al.: "On-line analysis of SO2 in flue gas and other process streams by gas chromatography", *p. 70, right-hand column, lines 8-24*.

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