Method of treating an acid treatment solution, device for treating the solution, and method of fabricating a support for a planographic printing plate
AssigneeFuji Photo Film Co., Ltd.
InventorsToru Kimura, Tsuyoshi Hirokawa, Toru Yamazaki
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Abstract
A method of treating an acid treatment solution which includes steps of adding sulfuric acid to an acid treatment solution which contains therein non-alkaline metal ions to produce sulfate, and recovering the regenerated acid treatment solution from the acid treatment solution to which the sulfuric acid has been added by separating the sulfate therefrom. Also, a device for realizing the method, and a method of fabricating a support for a planographic printing plate using the same.
Claims20
A method of treating an acid treatment solution which includes at least one of nitric acid and hydrochloric acid for removing non-alkaline metal ions therefrom, the method comprising the steps of:
- determining an amount of the non-alkaline metal ions in the acid treatment solution;
- adding a sulfuric acid to the acid treatment solution in an amount based on the amount of the non-alkaline metal ions to produce sulfate of the non-alkaline metal;
- recovering an acid treatment solution from which the sulfate is separated such that the sulfate is separated from the acid treatment solution to which the sulfuric acid has been added.
A device for treating an acid treatment solution which includes at least one of nitric acid and hydrochloric acid, for removing non-alkaline metal ions therefrom, the device comprising:
- a sulfuric acid addition component which adds sulfuric acid to the acid treatment solution in an amount based on an amount of the non-alkaline metal ions in the acid treatment solution to produce sulfate of non-alkaline metal;
- and
- an acid treatment solution recovery component which separates the sulfate from the acid treatment solution to which the sulfuric acid has been added and recovers the acid treatment solution.
A method for fabricating a support for a planographic printing plate, the method comprising the steps of:
- electrolytically surface-roughening an aluminum plate by an AC electrolysis thereon in an acid electrolyte that contains at least one of nitric acid and hydrochloric acid, in an AC electrolysis bath;
- drawing at least a portion of the acid electrolyte in the AC electrolysis bath out of the AC electrolysis bath;
- adding sulfuric acid to the acid electrolyte that has been drawn out of the AC electrolysis bath, in an amount based on an amount of aluminum ions in the acid electrolyte that has been drawn, so that aluminum sulfate is generated;
- and
- recovering an acid electrolyte from the acid electrolyte to which the sulfuric acid has been added, by separating the aluminum sulfate;
- and
- returning the recovered acid electrolyte to the AC electrolysis bath.
Dependencies are inferred from the claim text.