Salt pelletizing method

Details Salt pelletizing method Salt pelletizing method

1997-08-12

1999-08-10

Beck, Shrive

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Stratified or layered articles

264112, 264121, 427220, 427113, 427365, 427421, B05D 700, B05D 312

Patent

active

059354968

ABSTRACT:
A water soluble dicarboxylic acid or an alkali metal salt thereof acts as a mold release agent for salt pellets when a salt-contacting surface of a roll-type briquetting press is coated with from about 0.02 to about 5 mg/cm.sup.2 of a powder of the acid or alkali metal salt just prior to a charge of salt. The coating is achieved by spraying an air stream entraining the powder onto the press rolls or by spraying a solution of the release agent onto the rolls and evaporating the solvent to leave the powder on the rolls. The acid has from 6 to 10 carbon atoms; adipic acid being preferred. Salt pellets having a layer of the powder on their surface may be used in water softening systems wherein the pellets sit in a brine reservoir and supply salt for the recharging of an ion exchange resin. There is no formation of an unsightly scum on the surface of the brine and on the sides of the reservoir.

REFERENCES:
patent: 4170619 (1979-10-01), Fridrich
patent: 4439384 (1984-03-01), Bergendahl
patent: 4451381 (1984-05-01), Heiss et al.
patent: 5165613 (1992-11-01), Keller
patent: 5478515 (1995-12-01), Waatti et al.

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