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US 4,251,229 AGranted
Stabilized fuel slurry
AssigneeDai-Ichi Kogyo Seiyaku Co., Ltd.
InventorsAkihiro Naka, Shuichi Honjo, Kaoru Aoike
Life of this patent
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Abstract
A fuel slurry comprising a mixture of a fuel oil and pulverized coal may be effectively stabilized with a small amount of adducts of alkylene oxide and an alcohol, an amine, a carboxylic acid or a phenol, or inorganic acid esters of said adducts; or cross-linked products of said adducts or said inorganic acid esters.
Claims18
A fuel slurry composition comprising a fuel oil, 10 to 60 weight % of pulverized coal having an average particle size of less than 200 microns, less than 50 weight % of water and an effective amount of a stabilizing agent selected from the group consisting of:
- (a) a polyether-type adduct havng a molecular weight from 1,000 to 100,000 between a lower alkylene oxide and a compound having at least three active hydrogen atoms selected from the group consisting of an alcohol, an amine, a carboxylic acid and a phenol,
- (b) an inorganic acid ester of said polyether-type adduct, and
- (c) a cross-linked product of said polyether-type adduct or said inorganic acid ester with a cross-linking agent selected from the group consisting of a polyisocyanate, a polyepoxy compound, a polyaldehyde, a polycarboxylic acid and a functional derivative of said polycarboxylic acid, said effective amount of said stabilizing agent minimizing sedimentation of said pulverized coal from said composition.
Dependencies are inferred from the claim text.