Method of continuously controlling crystal fines formation

Details Method of continuously controlling crystal fines formation Method of continuously controlling crystal fines formation

1982-05-25

1984-10-23

Garris, Bradley

Chemistry: physical processes

Physical processes

Crystallization

23302T, 423266, 423422, B01D 902, C01D 724, C01D 740

Patent

active

044785992

ABSTRACT:
A method for continuously controlling the formation of crystal fines in a continuous crystallizing process in which product crystals are produced in a crystallizing zone from crystallizable material in a mother liquor, and in which product crystals are thereafter recovered. The invention is practiced by adding a flocculant, specific to the crystallizable material, to the mother liquor at a rate effective to cause flocculation of particles of crystallizable material in the mother liquor. One embodiment of the invention is practiced in a process for producing sodium bicarbonate crystals by adding anionic polyacrylate and/or polyacrylamide polymers to a sodium carbonate-containing feed brine received in a carbonator.

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