Process for concentrating latex dispersions

Details Process for concentrating latex dispersions Process for concentrating latex dispersions

1992-07-29

1993-09-07

Sever, Frank

Liquid purification or separation

Processes

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

210651, 2101952, 2102572, B01D 6114

Patent

active

052425967

ABSTRACT:
Latex dispersions are concentrated by a process in which, in a two-stage crossflow filtration, the latex dispersion is first concentrated under pressures of 2 to 7 bar and at temperatures of 20.degree. to 70.degree. C. under turbulent flow conditions, the permeate accumulating together with the emulsifier present therein is then also concentrated at 10 to 40 bar and at temperatures of 20.degree. to 50.degree. C. and the concentrate obtained is returned with the emulsifier to the first stage of the crossflow filtration process while the permeate of the second stage is returned to the production process.

REFERENCES:
patent: 4160726 (1979-07-01), Del Pico
patent: 4340702 (1982-07-01), Huddleston et al.
K. Gafgen; Chem. Ind., 3 (1977).
Abcor, Process Bulletin, PIB 249 (1975).
Abcor, Process Bulletin, PIB 250 (1976).
J. Zahka and L. Mir; Chem. Eng. Progress 12, 53 (1977).
J. J. S. Shen and L. Mir; Ind. Eng. Prod. Res. Dev., 21(1), 63 (1982).

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