TREATMENT OF WASTE SOLUTION CONTAINING TETRAALKYLAMMONIUM HYDROXIDE

Japanese Patent JP3392483

B2

PURPOSE: To stably treat a waste soln. without clogging a reverse osmosis membrane by subjecting the org. matter in the waste soln. containing tetraalkylammonium hydroxide to oxidation treatment to convert the same to a monomeric substance or to decompose the same and supplying the treated soln. to the reverse osmosis membrane while neutralizing the same to separate the moisture in the waste soln.
CONSTITUTION: A waste developing soln. (pH; 12-14) containing tetraalkylammonium hydroxide is pressurized by a pump 4 to be sent to an oxidation treatment tank 5 from a waste soln. storage tank 1 to be subjected to oxidation treatment by an oxidizing agent generating device 2 or the oxidizing agent from an oxidizing agent storage tank. By this method, a photoresist or a sensitizer being a polymeric substance is converted to a monomeric substance by oxidative decomposition and a surfactant or other org. matter is decomposed. An acid is added to the waste soln. within a neutralization treatment device 6 from an acid storage tank 3 to adjust the pH of the waste soln. to 6-8 and the treated waste soln. is supplied to a reverse osmosis membrane 9 under pressure from a reverse osmosis circulating storage tank 7 by a high pressure pump 8 and transmitted water 10 is taken out while a concn. soln. is circulated to the reverse osmosis circulating storage tank.

Satoshi Niimi
Namie Higuchi

JP28509993A

March 31, 2003

November 15, 1993

Click for automatic bibliography generation  

Chlorine Engineers Co., Ltd.

B01D61/04; C02F1/44; C02F1/66; C02F1/78; C02F9/00; (IPC1-7): C02F1/44; B01D61/04; C02F1/66; C02F1/78; C02F9/00

JP63294989A
JP60118282A
JP5297597A
JP5291130A
JP5104095A
JP5169061A

Akira Yonezawa (7 others)

Previous Patent: SYSTEM FOR TESTING HEART FUNCTION

Next Patent: ALUMINUM MATERIAL FOR BRAZING AND ITS PRODUCTION