Title:
RECOVERY OF COLORING EFFECTIVE COMPONENTS FROM WASTE WATER OBTAINED AT ALUMINUM ELECTROLYTIC COLORING PROCESS
Document Type and Number:
Japanese Patent JPS5597495
Kind Code:
A
Abstract:
PURPOSE:To reuse effectively and permanently coloring effective components present in waste water as electrolytic bath components by the procedure in which coloring effective components present in aluminum electrolytic coloring process waste water are concentrated by a reverse osmosis apparatus and, after removing coloring-interfering substances in the concentrated water, the concentrated water is sent back to the electrolytic coloring bath. CONSTITUTION:The aluminum material 1 subjected to a coloring treatment in the electrolytic coloring bath 2 using a water-soluble Ni compound, e.g., nickel sulfate, etc., is washed with water in the water washing tanks 3 and 4. The waste water from the first water washing tank 3 is sent to the pH-regulating tank 6, then pressurized 10 through the filter 9, and then sent to the reverse osmosis apparatus 11. Then, the membrane-permeated water from the apparatus 11 is supplied to the second water washing tank 4 to reuse it as washing water. On the other hand, the pressure of reverse osmosis concentrated water is released by the pressure-holding valve 12, and then the concentrated water is sent through the Na ion adsorption column 16 and the Al ion adsorption column 17 back to the bath 2.
Inventors:
ADACHI TAKAYOSHI
NAKAMURA KIMINARI
NAKAMURA KIMINARI
Application Number:
JP593379A
Publication Date:
July 24, 1980
Filing Date:
January 20, 1979
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO
International Classes:
C02F1/44; C25D11/24; C25D21/18; (IPC1-7): C02F1/44; C25D11/24