Process for the continuous workup of aqueous crude dye suspensio

Details Process for the continuous workup of aqueous crude dye suspensio Process for the continuous workup of aqueous crude dye suspensio

1988-07-25

1989-09-12

Sever, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210654, B01D 1300, B01D 1301

Patent

active

048657441

ABSTRACT:
The continuous workup of aqueous crude dye suspensions is carried out in a multi-stage membrane separation unit by feeding into each membrane separation stage a dye suspension and also wash water, permeate from the subsequent membrane separation stage or a mixture consisting of wash water and permeate. A separation into retentate (concentrate) and permeate takes place, in which the degree of concentration and the degree of desalting in each membrane separation stage is controlled by means of a suitable variable, for example the conductivity or the volume of the permeate in each case or the concentration of the retentate. This control allows the reproducible preparation of dye formulations having constant properties and, due to the optimization of the volume streams, leads to a significant reduction in water pollution.

REFERENCES:
patent: 4247401 (1981-01-01), Block et al.
patent: 4477634 (1984-10-01), Linder et al.
patent: 4523924 (1985-06-01), Lacroix
patent: 4559144 (1985-12-01), Pfenninger et al.
patent: 4560480 (1985-12-01), Lacroix et al.
patent: 4584103 (1986-04-01), Linder et al.
patent: 4604204 (1986-08-01), Linder et al.
patent: 4689048 (1987-08-01), Fortsch
patent: 4690765 (1987-09-01), Linder et al.
patent: 4690766 (1987-09-01), Linder et al.
patent: 4720345 (1988-01-01), Linder et al.

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