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특허 상세정보

Method for treating photographic process waste liquor through concentration by evaporation

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B01D-001/00    B01D-003/42   
미국특허분류(USC) 159/473 ; 159/161 ; 202/181 ; 203/1
출원번호 US-0513442 (1990-04-23)
우선권정보 JP-0069435 (1987-03-24); JP-0069437 (1987-03-24)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 8  인용 특허 : 12
초록

A method for treating photographic process waste liquor by evaporation to concentrat the waste liquor. The method includes evaporating with a heating device which has a heat density of about 17.2 kcal/cm2 or less; and intermittently feeding the waste liquor to maintain a predetermined liquid level in the vessel. By controlling the heating and/or the liquid level in the evaporation vessel, odors are controlled while efficiency is maintained.

대표
청구항

A method of treating photographic process waste liquor to concentrate the waste liquor in an evaporation vessel by evaporation, comprising the steps: (a) feeding the waste liquor into the evaporation vessel; (b) controlling the surface tension of the waste liquor to about 20 to 65 dyne/cm; (c) heating the liquor at a heat density of up to 17.2 kcals/cm2 to evaporate the waste liquor; (d) detecting the quantity of waste liquor in the evaporation vessel and, stopping the feeding of the waste liquor when the liquor is at a predetermined level for a predeter...

이 특허에 인용된 특허 (12)

  1. Wemhoff Mark F. (P.O. Box 4031 Enterprise FL 32725). Apparatus for photographic film processor pollution control. USP1987024640769.
  2. Weishaar Fern (Coram NY) Weishaar Walter (Coram NY). Apparatus for pollution control of industrial waste systems. USP1988024724044.
  3. Vandeputte Camille Angelina (Mortsel BE) Fierens Marcel Robert (Duffel BE) Aelterman Marcel Frans (Mortsel BE). Apparatus for processing photographic film and recovering solid substances from the processing solutions used. USP1976113995298.
  4. Schroter Herbert (Taunusstein DT). Apparatus for producing a developer medium for diazotype materials. USP1977124062031.
  5. Secunda David J. (3500 E. Lincoln Dr. Phoenix AZ 85018) Motz Lloyd (815 W. 181st St. New York NY 10027). Liquid-solids separation process. USP1982044323424.
  6. Wemhoff Mark F. (Enterprise FL). Method for pollution control in photographic processing. USP1988044735728.
  7. Torikai ; Eiichi ; Kawami ; Youji. Method for treating used or exhausted photographic fixing solution. USP1978024073705.
  8. von dem Bussche Gtz (Schwalbach DEX) Koblo Jochen (Wiesbaden DEX). Process and apparatus for developing a two-component diazocopying material. USP1982034319826.
  9. Shimamura Isao (Minami-ashigara JA) Iwano Haruhiko (Minami-ashigara JA). Process for treating waste photographic processing solutions. USP1977084043907.
  10. Foley Walter D. (Rochester NY). Temperature control system for a photographic processor. USP1988074755843.
  11. Ellis ; Jr. John C. (1084 Palmer Ave. Larchmont NY 10538). Water degasification and distillation apparatus. USP1986094612090.
  12. Othmer Donald F. (333 Jay St. Brooklyn NY 11201). Wet combustion process. USP1977044017421.