Additive for carbonaceous solid-water slurry, method for product

Details Additive for carbonaceous solid-water slurry, method for product Additive for carbonaceous solid-water slurry, method for product

1995-07-05

1997-11-25

Medley, Margaret

Fuel and related compositions

Solid carbonaceous fuel dispersed in a liquid medium

C10L 132

Patent

active

056907044

ABSTRACT:
An additive for a carbonaceous solid-water slurry which excels preeminently in the ability to disperse a finely powdered carbonaceous solid in water and, when used only in a small amount, permits production of a carbonaceous solid-water slurry which possesses high concentration, exhibits high fluidity, and precludes change of viscosity due to aging, a method for the production of the additive, and a slurry composition are provided. The additive to be used for high concentration of carbonaceous solid-water slurry comprises a specific water-soluble copolymer and contains a low molecular copolymer (a) having a weight weight-average molecular weight in a range or from 1000 to 39000 and specific ratios of adsorption relative to a carbonaceous solid and a clayish mineral and a high molecular copolymer (b) having a weight weight-average molecular weight of not less than 40000 and specific ratios of adsorption relative to a carbonaceous solid and a clayish mineral at a weight ratio, (a)/(b), in the range of from 10/90 to 99/1, the met hod is for the production of the additive, and the slurry composition is produced by the incorporation of the additive.

REFERENCES:
patent: 4092287 (1978-05-01), Ito et al.
patent: 4100339 (1978-07-01), Konig et al.
patent: 4330301 (1982-05-01), Yamamura et al.
patent: 4500445 (1985-02-01), French et al.
patent: 4756720 (1988-07-01), Kikkawa
patent: 4792343 (1988-12-01), Hawe et al.
patent: 4872885 (1989-10-01), Tsulakimoto et al.
European Search Report, EP 95 30 4723, Oct. 19, 1995.

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