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 invention relates to separation of submicron particles of illite mineral from illite clay. There is offered a method for separation of submicron particles of illite mineral from illite clay, comprising: (i) mixing of illite clay in dispersant aqueous solution or mixing of illite clay and dispersant in water; (ii) sedimentation of the resultant suspension; (iii) addition of a coagulant composition formed from a saturated solution of hydrazine hydrogen chloride, hydrochloride acid and acetone to the resultant suspension; (iv) separation of submicron particles of illite mineral from the solution, containing the potential dispersant and coagulant residues. There is also offered a coagulant adapted for use in separation of submicron particles of illite mineral from illite clay is offered, the coagulant being formed from a saturated solution of hydrazine hydrogen chloride, hydrochloride acid and acetone in weight ratio from 1:1:4 to 1:1:6.
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 present invention provides a novel formulation in a composition comprising FeC13 and a dialkyl dially1 ammonium polymer where the FeC13 has been diluted with water prior to being mixed with the polymer providing a stable composition.
摘要:
The invention relates to a method for treating an aqueous suspension of solid mineral particles arising from the extraction of ores, comprising the following steps: a soluble polymer is prepared in water, comprising: o at least one non-ionic monomer, selected from the group consisting of acrylamide; methacrylamide; N-monoderivatives of acrylamide; N-monoderivatives of methacrylamide; Ν,Ν-derivatives of acrylamide; Ν,Ν-derivatives of methacrylamide; acrylic esters; methacrylic esters; N-vinylformamide; and N-vinylpyrrolidone; o at least one anionic monomer representing between 10 and 70 mol%, selected from the group consisting of monomers having a carboxylic functional group and salts thereof; monomers having a sulphonic acid functional group and salts thereof; monomers having a phosphonic acid functional group and salts thereof; o at least one cationic monomer representing between 0.2 and 6 mol%, selected from the group consisting of diallyldimethylammonium chloride, methacrylamidopropyltrimethylammonium chloride and acrylamidopropyltrimethylammonium chloride; adding said soluble polymer into the water having the aqueous suspension of solid particles. This method is particularly useful for treating residues resulting from the extraction of bituminous sand.
摘要:
The invention relates to a method for clarification by flotation of water loaded with material in suspension, characterised in that the clarification treatment is carried out in two successive stages in a single plant. The method comprises a static flocculation step with descending current, integrated with a primary separation step for the heaviest particles, the zone in which the primary separation of the heaviest particles occurs being situated beneath the zone in which the static flocculation step is carried out and comprises a removal of the heaviest particles and a flotation step which guarantees the removal of the light particles, the decantation speed of which is below the threshold for cleaving the flotation agent.
摘要:
A process for purifying dry cleaning solvents from a mixture containing used dry cleaning solvents and contaminants, such as laundry soils, fabric treating agents, the process comprising the steps of: (a) obtaining a mixture comprising a lipophilic fluid and one or more contaminants; (b) chemically modifying the contaminant, (c) contacting the mixture with a purification agent, thereby changing the solubility of the contaminant in the mixture; and (d) separating the contaminant from the lipophilic fluid.