High solids lime as a caustic replacement

Details High solids lime as a caustic replacement High solids lime as a caustic replacement

1995-08-25

1997-04-01

Lovering, Richard D.

Compositions

Co, s, negative element, or acid, bindant containing

Alkali-metal or alkali-metal compound containing

252180, 252189, 2523131, 252314, C09K 300, B01J 1300

Patent

active

056162839

ABSTRACT:
A composition for a pumpable lime slurry which is adapted for use as a replacement for caustic solutions is formed by combining a dispersing agent in lime and water to form an aqueous slurry. The amount of lime used is between 35 to 55% by weight of the slurry. The dispersing agent, which is an anionic polyelectrolyte, such as polyacrylic, polycarboxylic acids and alkali metal salts thereof, is added in the an amount between 0.1 to 3% by weight of the lime. To this is added an alkali metal hydroxide of 0.1 to 1.5% by weight of lime. The order of addition of the alkali metal hydroxide is important. The later addition of the alkali metal hydroxide results in a decreased viscosity so that a lower amount of dispersing agent is required.

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patent: 4816182 (1989-03-01), Novich et al.
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