Abstract:
A method of preparing a water in oil emulsion comprises forming a mixture of oil and emulsifying agent, progressively adding an aqueous salt solution to the mixture and dispersing the aqueous salt solution into the mixture. A concentrated water in oil emulsion is formed with drops of the aqueous salt solution (1) packed inside the oil solution phase (2). The emulsion is added to water and then mixed so that the emulsion absorbs the water. The salt concentration of the emulsion relative to the salt concentration of the water is controlled. Methods of agglomerating fine hydrophobic particles in a slurry using the water in oil emulsion are provided, where the emulsion is added to the slurry and then mixed so that the emulsion absorbs the water in the slurry. The salt concentration of the emulsion relative to the salt concentration of the slurry is controlled.
Abstract:
A process for separating clean water which has an impurities content of less than 100 ppm from waste materials such as farm manure is disclosed. In a first step, a plate separator splits the waste material stream into a first effluent fraction and a first solids fraction. The first solids fraction then undergoes two stages of pressing to increase the solids contents to about 30 to 40 percent which makes it suitable for granulation or pelletizing. The first effluent fraction is treated in successive stages with various chemical agents resulting in the removal of most of the solids and inorganic impurities from the effluent to achieve drinkable water purity.
Abstract:
A dispersion for use with an effluent treatment system, and methods of making and using such a dispersion, whereby the dispersion includes an amount of polymer substantially uniformly dispersed within an aqueous solvent; wherein the dispersion is generated by combining an amount of gas with the amount of polymer and the aqueous solvent, the amount of gas effective to substantially uniformly disperse the amount of polymer within the aqueous solvent.
Abstract:
This disclosure relates generally to selective flocculation, and more particularly to portable test-device for performing selective flocculation experiments in continuous mode. The test-device includes a slurry inflow system, a flocculant tank, a static mixer, a control pumping system, and a thickener system. The static mixer is connected to the slurry inflow system and the flocculant tank, to receive and mix flocculant solution and slurry and cause formation of floc. The control pumping system connects the flocculant tank and the slurry inflow system to the static mixer to control the control parameters responsible for pumping the slurry and flocculant solution in the continuous mode in the static mixer. The thickener system comprises a thickener tank to receive treated slurry and the floc from the static mixer, separately collect tailings and the floc from the thickening tank. The components of the portable test-device are removably connected to each other.
Abstract:
A dispersion for use with an effluent treatment system, and methods of making and using such a dispersion, whereby the dispersion includes an amount of polymer substantially uniformly dispersed within an aqueous solvent; wherein the dispersion is generated by combining an amount of gas with the amount of polymer and the aqueous solvent, the amount of gas effective to substantially uniformly disperse the amount of polymer within the aqueous solvent.
Abstract:
A flocculant, according to embodiments of the present disclosure, includes a core nanoparticle and at least one positively charged functional group on a surface of the core nanoparticle. The nanoparticle may comprise a silica, alumina, titania, iron oxide, iron nitride, iron carbide, or a carbon-based nanoparticle. The flocculant may be used, in a method of bitumen recovery, to neutralize and agglomerate bitumen droplets and/or mineral particles derived from oil sands ore. The bitumen droplets agglomerate about the core nanoparticle of the flocculant to form bitumen flocs, while the mineral particles agglomerate about the core nanoparticle of the flocculant to form mineral flocs. The buoyant bitumen flocs may then separate from the dense mineral flocs to enable high-yield recovery of bitumen from oil sands.
Abstract:
There is disclosed certain hyperbranched polyester amides with a cloud point of at least 50° C. in water with end groups selected from: two or more i] tertiary amine functional end groups ii) ammonium functional end groups, iii) polyalkylene glycol functional end groups; iv) quaternary ammonium zwitterionic end groups and/or v) other ionic groups (such as phosphate or sulfate), that are useful in various end uses such as a flocculant.
Abstract:
Additive composition for use in separating particles of a desired material from particles of an undesired material in a froth flotation process using a frother. The composition includes an alkylated polymer of vinylpyrrolidone and a liquid carrier comprising the frother.
Abstract:
Natural coal containing inorganic impurities may be deashed by the selective flocculation process using a novel flocculant which is a water-soluble or water-dispersible copolymer having a molecular weight from about 100,000 to about 30,000,000 comprising a hydrophilic monomeric unit having a solubility in water greater than 15% by weight at 20.degree. C. and a hydrophobic monomeric unit having a solubility in water less than 10% by weight at 20.degree. C. in proportions of 99:1 to 20:80% by weight.
Abstract:
An improved process for the enrichment of bauxites with unfavorable textures and low qualities via flotation and carried out after selective agglomeration. According to the process of the invention a water-soluble prepolymer of low chain length is added to the slurry as flocculating agent, thereafter the polymerization is started again by heating the slurry and/or adjusting its pH and/or adding a catalyst thus converting the polymer chain fragments adhered onto the gangue with high surface activity into a cross-linked resin, and finally the slurry is subjected to flotation in the presence of a conventional flotation aid.