Kerr-Mcgee Chemical, LLC

Avinash D Puri

James L Fairchild

James B Rodosevich

Boric acid is crystallized from saturated aqueous solutions thereof by adding to the solutions small proportions of water soluble polymers which control the particle size distribution of the boric acid during crystallization.

Method for controlling boric acid particle size distribution

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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Ridgecrest, CA, United States of America

Avinash D Puri