Abstract: The present invention provides a process for dewatering a mineral slurry concentrate and increasing the production of the resulting filter cake consisting essentially of mixing an aqueous mineral slurry concentrate with an effective amount of a nonionic surfactant and an effective amount of a cationic polymer to form a nonionic surfactant and cationic polymer treated aqueous mineral slurry concentrate, and subjecting the treated aqueous mineral slurry concentrate to a liquid water removal process for dewatering the treated aqueous mineral slurry and for increasing the production of a resulting filter cake of the dewatered mineral slurry. An improved mineral slurry concentrate composition and an improved mineral concentrate filter cake is also disclosed.

Abstract: A composition for application to a surface and a method of making the same, said composition comprising at least one wax; at least one reaction product derived from a first surfactant and a second surfactant; and between 40% and 99.8% water by weight. The composition is made by: a) forming an emulsion by combining the water and the wax after heating both the water and the wax to a temperature greater than the melting point of the wax, where at least one of said water and said wax contains said first surfactant, said first surfactant being selected from the group consisting of a cationic surfactant and an anionic surfactant; and b) adding said second surfactant to the emulsion, said second surfactant having a charge which is opposite to that of said first surfactant.

Abstract: A method of emulsifying asphalt using a polyamine polybetaine, preferably a dibetaine, as an emulsifier or co-emulsifier and an emulsion of asphalt, water and a polybetaine, preferably a diamine dibetaine. The advantages of using a polyamine polybetaine as an emulsifier or co-emulsifier include its ability to provide superior cationic and anionic emulsions, and slow-setting emulsions at low use levels, and the excellent adhesion of the cured asphalt film.

Abstract: A low softening point pitch is disclosed. A high melting point (100° C.+) pitch is blended with an aromatic rich liquid hydrocarbon stream to form a pourable pitch mixture having a softening point of 30-50° C. which can be used as a partial or complete replacement for coal tar pitch used in driveway sealer and other sealer and coating applications. Driveway sealer (an emulsion of clay, water and binder) made with this pitch has enhanced durability. The low softening point pitch, even when blended with coal tar pitch, is phase stable on storage.

Abstract: A process for the preparation of an aqueous tar suspoemulsion includes the steps of mixing a mixture including (a) a viscous tar composition formed from a tar, from inorganic solids and, optionally, from water; (b) water (W); (c) a surface-active agent (SA) exhibiting a hydrophilicity/lipophilicity balance (HLB) of at least 10; and, optionally, (d) a thickening water-soluble polymer (TWP) with a molecular mass of greater than 10,000. The relative amounts of constituents (W), (SA) and, optionally, (TWP) are such that the viscosity of the (W)+(SA)+optional (TWP) mixture is preferably equal to or greater than the viscosity of the tar. An optional embodiment of the process provides for dilution of the mixture obtained with water or with an aqueous acidic solution.

Abstract: The present invention provides a liquid amine composition for an emulsifier for bitumen which can impart, to a bituminous emulsion, more excellent emulsifying stability and adhesive properties to aggregates than conventional products. The liquid amine composition for the emulsifier for bitumen of the present invention comprises (1) 5 to 70% by weight a monoamine having an aliphatic hydrocarbyl group of 8 to 22 carbon atoms, (2) 20 to 80% by weight of a polyamine having an aliphatic hydrocarbyl group of 8 to 22 carbon atoms, and (3) 10 to 75% by weight of an organic acid of 4 to 18 carbon atoms.

Abstract: A composition for dispersing oil slicks consisting of a surfactant or a mixture of surfactants having the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different oxyalkylene or polyoxyalkylene groups,andwherein R.sub.3 and R.sub.4 are the same or different alkyl or alkenyl groups. The composition also includes a carrier solvent.