Ester-amides of polycarboxylic acids as rheological additives fo

Details Ester-amides of polycarboxylic acids as rheological additives fo Ester-amides of polycarboxylic acids as rheological additives fo

1988-07-26

1992-03-31

Medley, Margaret

Fuel and related compositions

Solid carbonaceous fuel dispersed in a liquid medium

44404, 44405, 44406, 44407, 44408, 44410, C10L 132

Patent

active

051004380

ABSTRACT:
Coal-water slurries containing a rheological additive are provided. Rheological additives employed for preparation of the coal-water slurries are ester-amide products obtained by reaction of a polycarboxylic acid with a polyether glycol and aliphatic amine. Salts of the ester-amides may also be advantageously employed as dispersants. The ester-amide additives are employed in an amount from about 0.1 to about 4 percent by weight of the slurry. Stable aqueous slurries containing from 60 to 80 percent by weight coal solids are produced.

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patent: 4288232 (1981-09-01), Schmolka et al.
patent: 4392865 (1983-07-01), Grosse et al.
patent: 4398919 (1983-08-01), Zakaria
patent: 4634450 (1987-01-01), Ljusberg-Wahren

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