Dispersants for aqueous slurries
AssigneeThe Dow Chemical Company
InventorsTimothy Thomson, Ronald L. Glomski
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Abstract
The present invention provides a water-soluble dispersant for aqueous slurries of coal, lignite, cement, gypsum, and fillers. The dispersant comprises a sulfonated mixture of polynuclear fused-ring aromatic hydrocarbon compounds. The mixture, prior to sulfonation, (a) is liquid at a temperature of 100.degree. Centigrade, (b) has an aromatic content of more than about sixty percent, (c) a molecular weight distribution of from about 150 to about 10,000, and (d) a weight average molecular weight of less than about five hundred.
Claims9
A water-soluble dispersant composition comprising a mixture of sulfonated polynuclear fused-ring aromatic hydrocarbon compounds having a sulfur content of from about 10 to about 20% by weight of the mixture and produced by sulfonating polynuclear fused-ring aromatic hydrocarbon compounds which are liquid at a temperature of about 100.degree. Centigrade, and have a weight average molecular weight of less than 500 and an aromatic content of greater than about 60 percent.
A water-soluble dispersant composition comprising an alkali metal salt of a mixture of sulfonated polynuclear fused-ring aromatic hydrocarbon compounds having a sulfur content of from about 10 to about 20% by weight of the mixture and produced by sulfonating and neutralizing polynuclear fused-ring aromatic hydrocarbon compounds which are liquid at a temperature of about 100.degree. Centigrade and have a weight average molecular weight of less than 500 and an aromatic content of greater than about 60 percent.
Dependencies are inferred from the claim text.