45results about How to "Good stripping performance" patented technology

The invention discloses an extraction system for extracting alkaline metals or alkaline-earth metals. The extraction system comprises an extraction agent and a synergistic extraction agent, wherein the extraction agent is a diketone compound, and the synergistic extraction agent is a neutral phosphoric-oxygenic compound. The invention further discloses a method for extracting lithium ions from an alkaline metal solution and extracting alkaline-earth metals from a mixed solution of alkaline metals and alkaline-earth metals through the extraction system. The extraction system has excellent effects for extracting and separating alkaline metals or alkaline-earth metals; and meanwhile, a synergistic extraction agent, ferric trichloride, in the prior art is avoided in the extraction system, so that problems such as high acidity caused by the ferric trichloride and the like can be avoided, the acid dosage and the cost can be reduced, and the corrosion to devices can be reduced as well. After lithium ions or alkaline-earth metal irons are extracted by using the extraction system, the reverse extraction and regeneration processes are simple, and the operation is facilitated.

The invention relates to a mixed amine extractant for the separation of molybdenum and vanadium and a method for separating and recovering molybdenum and vanadium from waste catalysts. The mixed amine extractant includes imidazole compounds and quaternary ammonium salt compounds, which are separated from waste catalysts. The method for recovering molybdenum and vanadium is as follows: the waste catalyst containing molybdenum and vanadium is leached with alkali to obtain a leach solution containing molybdenum and vanadium, and the leach solution containing molybdenum and vanadium is extracted and separated by an organic phase containing a mixed amine extractant, and the raffinate The solution is a molybdenum-containing solution, and the loaded organic phase is washed and stripped to obtain a vanadium-containing solution; the mixed amine extractant has the characteristics of large saturation capacity, short phase separation time, excellent extraction and stripping performance, and high separation coefficient of molybdenum and vanadium. The method can realize high-efficiency separation of vanadium and molybdenum in the alkaline solution system, and has good industrial application prospects.

The invention discloses a branched long-chain fatty acid-based imidazoline extractant and its preparation method and application. The imidazoline extractant includes a plurality of N atoms and long-chain branched alkyl groups. The preparation method is: , reacting carboxylic acid and polyethylene polyamine under the action of a solid catalyst, after the reaction is completed, the solid catalyst is recovered by solid-liquid separation, and the liquid mixture is recovered by distillation to obtain unreacted raw materials; the preparation method has the advantages of mild reaction conditions, catalyst Reusable, low equipment investment and operating costs; imidazoline extractant is used for the extraction of anions containing tungsten, molybdenum, vanadium, etc. It has the characteristics of high extraction capacity, short phase separation time, and excellent extraction and stripping performance. Good prospects for industrial application.

The invention discloses a ceramic core for casting a titanium alloy. The ceramic core is characterized by comprising the following raw materials in percentages by weight: 10-14wt% of a mineralizer, 13-20wt% of a plasticizer, 3-5wt% of aluminum dihydrogen phosphate, 0.5-1wt% of xanthan gum and the balance of rare earth-coated boron nitride powder. The ceramic core disclosed by the invention has the characteristics that the sintering property is excellent, mechanical properties at room temperature are good and the chemical reaction inertia with melt titanium is good, the core removal performance is good, the maximum bending strength at room temperature is 27MPa and the maximum flexural strength at room temperature is 6.5MPa.

The invention discloses a double-pyrazole extracting agent derived from o-phenanthroline with the following structural general formula, and a preparation method and application of the double-pyrazoleextracting agent. In the formula, R is any one selected from n-octyl, n-butyl, isobutyl, ethyl, pyridyl and phenyl. The double-pyrazole extracting agent derived from the o-phenanthroline provided by the invention has a unique rigid structure and an alkyl chain for improving the solubility, and simultaneously only four elements of C, H, O and N are contained, so that the extraction kinetics of a separation extraction system can be greatly increased, the extraction capacity of an organic phase can be increased, secondary pollutants cannot be produced, and thus the environmental protection is facilitated. The extraction agent can be used to separate Ans (actinide elements) / Lns (lanthanide elements), and can not only form a separation extraction system of the Ans / Lns, but also can be used to form a separation reverse extraction system of the Ans / Lns.

The invention discloses a method for separating and extracting enriched gold from cyanide gold-leaching barren solution, which comprises the following steps: evenly mixing trialkyl phosphorus oxide and tributyl phosphate, and adding diluent to obtain extracted organic phase; adding salting-out agent into cyanide gold-leaching solution; adding the extracted organic phase, oscillating and contacting for 1-20 min at the normal temperature, and setting aside for phase-splitting to obtain gold-bearing organic phase, wherein the volume ratio between the extracted organic phase and the cyanide gold-leaching liquid is 1:1-1:20; and carrying out back-extraction on the gold-bearing organic phase by back extracting agent at 40-70 DEG C to obtain back-extracted gold solution. By adopting the method, the extraction ratio reaches more than 96 percent, and the back-extraction ratio reaches more than 90 percent; and the extracted organic phase can be recycled circularly and has remarkable economic and environmental benefits. The invention has simple operation, good extraction effect, simple and easily-obtained extraction agent, low price, less consumption amount, fast extraction speed, short phase-spitting time, higher selectivity, convenient industrial achievement, saved cost and improved efficiency.

The invention discloses a method for reversely extracting and co-production of industrial-grade phosphate by using phosphate mother liquor for wet-method purification phosphoric acid, which is capable of lowering the production cost. The method comprises the following steps of a, adding a defluorination agent, an adsorbent and oxidizing agent in wet-method purification phosphoric acid for defluorination and decolorization; b, extracting phosphoric acid with an extraction agent, adding inorganic acid in the middle of an extraction tower; c, desulfurating and washing; d, reversely extracting with industrial-grade phosphate mother liquor; e, finely tuning slurry; f, feeding the finely tuned phosphate slurry into a crystallizer for crystallizing, then carrying out solid-liquid separation and drying to obtain product industrial-grade phosphate, wherein the slurry obtained from solid-liquid separation is industrial-grade phosphate mother liquor which is subjected to pH value adjustment and returned to step d for use. Reverse extraction is carried out by cooled and crystallized industrial-grade phosphate mother liquor, the reverse extraction effect is good, the step of evaporation is avoided, desulphurization and washing are carried out simultaneously, the procedures are simplified, and the production cost is saved. A new preparation method of the industrial-grade phosphate is provided.

The invention provides a method for preparing a porous alumina ceramic core. The ceramic core comprises the following raw materials: electric melting-corundum powder, porous alpha-Al2O3 powder, TiO2 powder and paraffin. The method comprises the following steps: mixing the electric melting-corundum powder, the porous alpha-Al2O3 powder and the TiO2 powder; heating an oil bath crucible type stirrerto 100 to 120 DEG C; adding the paraffin into the oil-bath crucible type stirrer to be melted; adding mixed powder to the paraffin, and stirring the mixture to obtain mixed slurry; pressing a core byadopting a hydraulic core-pressing machine, controlling the temperature of the mixed slurry to between 95 and 110 DEG C and the injection pressure to between 3.0 and 3.5MPa; and roasting the pressed core by adopting a bell type sintering furnace. The porous alumina ceramic core prepared by the method has the porosity of between 45 and 55 percent, and can effectively improve the core removing performance of the core.