C - Chemistry – Metallurgy – 10 – L
Patent
C - Chemistry, Metallurgy
10
L
44/10, 260/604.2
C10L 1/32 (2006.01)
Patent
CA 1199176
CANADIAN PATENT APPLICATION OF MAIT MIHKEL MATHIESEN, LARS INGEMAR GILLBERG, KARL MARTIN EDVIN HELLSTEN AND GUNVOR BIRGIT TORA KARLSSON FOR AN AQUEOUS SLURRY OF A SOLID FUEL AND A PROCESS AND MEANS FOR THE PRODUCTION THEREOF Abstract of the Disclosure 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 poly- alkylene oxide chain with a length of at least 40, pre- ferably 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: Image (IX) wherein R1 and R2 are hydrogen or an alkyl group with 1-22 carbon atoms, provided that the sum of the number of carbon atoms of R1 and R2 is at least 6, and Z1 de- signates the group -S03H, -CH2NHR3R4X- or -CH2NR3R4R5X-, wherein R3, R4 and R5 are alkyl and/or hydroxyalkyl groups with 1-4 carbon atoms and X is an anion, and n is 40-200.
427615
Gillberg Lars I.
Hellsten Karl M.e.
Karlsson Gunvor B.t.
Mathiesen Mait M.
Ab Carbogel
Berol Kemi Ab
Gastle And Associates
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