Method of controlling the amount of seed material in the precipi

Details Method of controlling the amount of seed material in the precipi Method of controlling the amount of seed material in the precipi

1977-07-21

1979-04-24

Carter, Herbert T.

Chemistry: physical processes

Physical processes

Crystallization

73432PS, 423119, 423121, 423DIG5, 422245, 23305A, B01D 900

Patent

active

041509528

ABSTRACT:
A method for sampling and controlling the addition of suspended gases, liquids and solids in a control stream to a process stream is disclosed wherein the surface area of the suspended material acts as the determining feature for control of the process. The measured surface area is compared with a preselected surface area to control the addition of the suspended material. This method is particularly useful for the control of particulate seed material to the process stream in the Bayer process for the production of alumina. The method is also broadly applicable to physical and/or chemical control means in an analytical scheme for controlling and monitoring any process.

REFERENCES:
patent: 2935376 (1960-05-01), Roberts
patent: 3482452 (1969-12-01), Tabikh
patent: 3607140 (1971-09-01), Miller et al.
patent: 3797319 (1974-03-01), Abe
patent: 3838480 (1974-10-01), Gnyra
patent: 4049773 (1977-04-01), Mejdell et al.

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