|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||159/473 ; 159/161 ; 202/181 ; 203/1|
|우선권정보||JP-0069435 (1987-03-24); JP-0069437 (1987-03-24)|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 8 인용 특허 : 12|
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.
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...