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AssigneeAsahi Kasei Chemicals Corporation
InventorsYoshiro Arimori, Toshiaki Kaneko, Sachio Asanagi
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An object of the present invention is to provide a system for recovery of electrodeposition paint wherein the loss of the electrodeposition paint is not increased, even if the number of stages of a multistage recovery and washing process with a membrane filtration filtrate is reduced in electrodeposition painting. The system for recovery of electrodeposition paint of the present invention, in which a membrane filtration filtrate of electrodeposition bath liquid is supplied to a final stage washing tank of the multistage recovery and washing process with a membrane filtration filtrate, is characterized in that a filtrate obtained by membrane filtration of the final stage washing tank liquid is supplied to the final stage washing tank and concentrated liquid is supplied to the electrodeposition bath and/or a washing tank at other than the final stage.
A system for recovery of electrodeposition paint wherein a membrane filtration filtrate of electrodeposition bath liquid is supplied to a final stage washing tank of a multistage recovery and washing process with the membrane filtration filtrate, characterized by supplying a filtrate obtained by membrane filtration of the final stage washing tank liquid to the final stage washing tank, and supplying concentrated liquid to an electrodeposition bath and/or a washing tank at other than the final stage.
An apparatus for recovery of electrodeposition paint comprising an electrodeposition bath, a multistage recovery and washing process with a membrane filtration filtrate and a final washing process, wherein the apparatus comprises a first membrane filtration apparatus for filtrating electrodeposition bath liquid and a second membrane filtration apparatus for filtrating the final stage washing tank liquid of the multistage recovery and washing process with a membrane filtration filtrate.
Dependencies are inferred from the claim text.