Aqueous slurry of a solid fuel and a process for the production thereof

US4565549A · kind A · utility

Assignees

• AB Carbogel · SE
• Berol Kemi AB

Inventors

• Mait M. Mathiesen · Arild, SE
• Lars I. Gillberg · Lund, SE
• Karl M. E. Hellsten · Ödsmål, SE
• Gunvor Karlsson · Stenungsund, SE

Key dates

• Filing date: May 6, 1983
• Grant date: Jan 21, 1986
• Expiry date: May 6, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S516/01
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An aqueous slurry of a solid fuel and a process for producing said slurry are described. The aqueous slurry consists of a highly concentrated slurry of a pulverized, carbonaceous material having a particle size of at most 0.5 mm, and 0.02-2% by weight of at least one additive. The solids content of the slurry is 65-90% by weight, preferably 70-80% by weight. The slurry is characterized in that the additive includes a water-soluble surface active compound which is an ethylene oxide adduct having the following formula: EQU RO(CH.sub.2 CH.sub.2 O).sub.n H wherein R is an aliphatic or acyl group with 10 to 24 carbon atoms or a substituted aryl group with 12-54 carbon atoms; and n is at least 40 but less than 100; or n is 40-200 in which latter case the ratio of ethylene oxide units to the number of carbon atoms in the group R is 3.5-6.0 when R is an aliphatic or acyl group and 3.0-5.5 when R is a substituted aryl group. By adding the ethylene oxide adduct after wet milling and dewatering of the carbonaceous material, an aqueous slurry is obtained which is stable, i.e. it does not separate during transport and storage, as well as low-viscous, i.e. pumpable at a high solids content. In a…