摘要:
A method for treatment of tailings including, but not limited to, mature fine tailings (MFT) from mine tailings, oil sands, coal tailings, industrial tailings, thin fine tailings (TF), and laterite tailings. The method comprises contacting the tailing with a deflocculant to reduce the yield stress and viscosity of the tailings, resulting in accelerated solid mineral sedimentation and segregation. The process may yield nanoclays (NCs) that may be used for NC compositions.
摘要:
The invention provides an improved method for dewatering coal tailing aqueous slurries in a twin belt press process. The method including the step of adding to the slurry a high molecular weight anionic flocculant followed by a coagulant containing vinylamine. The flocculated coal is then mechanically dewatered using a twin belt press.
摘要:
A chemical treatment process and separation module are described for removal of soluble organic compounds and suspended or emulsified oils and/or solids from produced waters that accompany operations for oil and gas recovery. The process occurs in its entirety within an interval of several minutes. The solubility of organic compounds is first reduced, in an optional step, by pH reduction, followed by treatment with coagulants and flocculants, the latter in conjunction with microbubble flotation. The organic compounds that are rendered insoluble, along with other oily solids, are captured in the floe created by the coagulant and flocculant treatment, and simultaneously made buoyant by the concurrent addition of microbubbles. The water and floe is passed over an array of sloped strainers that separates and diverts the floe from the effluent water, which contains significantly reduced soluble organic content. The separated stream of oily solids can be dewatered for disposal as waste.
摘要:
A chemical treatment process and separation module are described for removal of soluble organic compounds and suspended or emulsified oils and/or solids from produced waters that accompany operations for oil and gas recovery. The process occurs in its entirety within an interval of several minutes. The solubility of organic compounds is first reduced, in an optional step, by pH reduction, followed by treatment with coagulants and flocculants, the latter in conjunction with microbubble flotation. The organic compounds that are rendered insoluble, along with other oily solids, are captured in the floe created by the coagulant and flocculant treatment, and simultaneously made buoyant by the concurrent addition of microbubbles. The water and floe is passed over an array of sloped strainers that separates and diverts the floe from the effluent water, which contains significantly reduced soluble organic content. The separated stream of oily solids can be dewatered for disposal as waste.
摘要:
Boron is removed from an aqueous boron solution by contacting with the aqueous boron solution with a water-soluble cationic polyelectrolyte, and at least one of polyvinyl alcohol and anionic-modified polyvinyl alcohol under an alkaline condition, and then removing the generated coagulation.
摘要:
The removal of oils, fats, and proteins from various industrial process streams containing these materials; such as dairy, cheese, whey, meat, fish, and vegetable process streams is accomplished by adding a mixture of sulfuric or phosphoric acid with calcium or magnesium phosphate or sulfate to the waste water to adjust the pH of the waste water to less than 7; and then separating the resulting solids from the liquid in the waste water; and adjusting the pH of the solids and liquid to make them acceptable waste products having a pH of 6-9.
摘要:
A method of recover dry cleaning solvents from a mixture containing a used dry cleaning solvent and contaminants, such as laundry soils, fabric treating agents. Specifically, purification agents are added to the mixture to effect a change in the mixture such that the contaminants become less soluble in the mixture and can be easily separated from the dry cleaning solvents.
摘要:
The present invention discloses a process and an apparatus for removing deep sub-micron particles from water. The invented process includes adjusting pH value and conductivity, adding an oxidation agent, performing an electro coagulation reaction/an electro-oxidation reaction, and performing a flocculation sedimentation, etc. The invented apparatus includes a front adjustment tank for adjusting the properties of waste water, wherein the adjustment includes a pH adjustment, an electrolyte adjustment, or an oxidant addition, etc.; an electrocoagulation reaction tank receiving water from the front adjustment tank and having pairs of separated electrodes, one of the electrodes being made of iron; a rear adjustment tank for adjusting pH value of the effluent of the electrocoagulation reaction tank; and a sedimentation reservoir for providing the resulting pH-adjusted, sedimentary floccule-containing water from the rear adjustment tank with a sufficient residence time in said sedimentation reservoir, so that floccules and sedimentation are formed therein.
摘要:
By dispersing a clay-containing mineral matrix in an aqueous solution of EDTA before washing or classifying the ore, one obtains a system in which the subsequently formed clays consolidate at an unexpectedly high rate and to a higher final density.
摘要:
Boron is removed from an aqueous boron solution by contacting with the aqueous boron solution with a water-soluble cationic polyelectrolyte, and at least one of polyvinyl alcohol and anionic-modified polyvinyl alcohol under an alkaline condition, and then removing the generated coagulation.