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

US4549881A · 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: Oct 29, 1985
• 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 and a means for producing said slurry are described. The aqueous slurry comprises 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 two surface active additives. The solids content of the slurry is 65-90% by weight, preferably 70-80% by weight. The slurry is characterized in that the surface active additives include, as a major part, a water-soluble nonionic surface active agent which is an alkylene oxide adduct with a hydrophobic part and a hydrophilic part, said hydrophilic part consisting of at least one polyalkylene oxide chain with a length of at least 40, preferably 50-150 ethylene oxide units; and, as a minor part, an ionic surface active agent. The ionic surface active agent preferably has the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are hydrogen or an alkyl group with 1-22 carbon atoms, provided that the sum of the number of carbon atoms of R.sub.1 and R.sub.2 is at least 6, and Z.sub.1 designates the group --SO.sub.3 H, --CH.sub.2.sup.+ NHR.sub.3 R.sub.4 X.sup.- or --CH.sub.2.sup.+ NR.sub.3 R.sub.4 R.sub.5 X.sup.-, wher…