RECOVERY OF COLORING EFFECTIVE COMPONENTS FROM WASTE WATER OBTAINED AT ALUMINUM ELECTROLYTIC COLORING PROCESS

Title:

RECOVERY OF COLORING EFFECTIVE COMPONENTS FROM WASTE WATER OBTAINED AT ALUMINUM ELECTROLYTIC COLORING PROCESS

Document Type and Number:

Japanese Patent JPS5597494

Kind Code:

A

Abstract:

PURPOSE:To reuse permanently coloring effective components present in waste water as electrolytic bath components by the procedure in which coloring-interfering substances present in aluminum electrolytic coloring process waste water are first removed and then coloring effective components are concentrated by a reverse osmosis apparatus and sent back to 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., as a coloring effective component, is washed with water in the water washing tanks 3 and 4. Then, the waste water from the first water washing tank 3 is sent to the Na ion adsorption column 7 and the Al ion adsorption column 8 to remove the coloring-interfering substances Na and Al ions present in the waste water and then stored in the receiving tank 9. Then, the waste water deprived of the coloring-interfering substances from the receiving tank 9 is supplied through the filter 10 into the reverse osmosis apparatus 12 by pressure 11, and then membrane-permeated water from the apparatus 12 is sent to the second water washing tank 4 to reuse it as washing water. On the other hand, reverse osmosis concentrated water is depressurized through a pressure-holding valve and then sent back to the bath 2.

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Inventors:

ADACHI TAKAYOSHI
NAKAMURA KIMINARI

Application Number:

JP593279A

Publication Date:

July 24, 1980

Filing Date:

January 20, 1979

Export Citation:

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Assignee:

SUMITOMO CHEMICAL CO

International Classes:

C02F1/44; C25D11/24; C25D21/18; (IPC1-7): C02F1/44; C25D11/24

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