Concentrating evaporators – Processes – Involving waste liquid
Patent
1989-12-20
1991-04-02
Manoharan, Virginia
Concentrating evaporators
Processes
Involving waste liquid
159 29, 159 431, 203 1, 203 2, 203100, 203DIG11, 203DIG25, 354299, B01D 100
Patent
active
050045229
ABSTRACT:
A method of treating photographic process waste liquor through concentration by evaporation, including heating an upper part of photographic process waste liquor to concentrate by evaporation the photographic process waste liquor in such a manner that the difference between the temperature of the photographic process waste liquor in the vicinity of the heated part and the temperature at a bottom part of the photographic process waste liquor may become 5.degree. C. or more, and causing a solute in the photographic process waste liquor to settle.
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Weissberger et al., "Technique of Organic Chemistry", vol. IV, Distillation, pp. 348-352.
Patent Abstracts of Japan, vol. 11, No. 335 (p-632)[2782], Nov. 4th, 1987; & JP-A-62 118 346 (Konishiroku Photo Ind. Co. Ltd.), 29-05-1987.
Goto Nobutaka
Kobayashi Kazuhiro
Koboshi Shigeharu
Kurematsu Masayuki
Takabayashi Naoki
Konica Corporation
Manoharan Virginia
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