32results about How to "Easy to achieve continuous production" patented technology

The invention discloses a method for preparing a calcium sulfate whisker through recrystallization. The method is characterized in that the method comprises the steps of (1), conducting program control on heating and dissolution courses: putting a raw material with a main ingredient of calcium sulfate into a sulphuric acid solution for stirring, heating simultaneously, heating a mixture to 60-95 DEG C at a certain rate with the adoption of the program control, dissolving for 20min-1h, (2), conducting the program control on cooling and recrystallization courses: using the program control to cool a suspension obtained by dissolution to 10-30 DEG C, ageing for 20min-2h, (3), conducting separating and washing courses: conducting solid-liquid separation on the suspension, washing a separated solid-phase product, and (4), conducting a drying course: drying the washed solid-phase product at a certain temperature, and obtaining the calcium sulphate dihydrate whisker. The calcium sulfate whisker is prepared by utilizing a recrystallization principle under an ordinary-pressure mild condition, and a relatively economical technological approach can be provided for the resource utilization of industrial by-products such as desulfurization gypsum and phosphogypsum.

The invention discloses a preparation method of a double-net hydrogel fiber and a product thereof. The preparation method mainly includes following steps: (1) preparation of a spinning raw solution: dissolving one or more water-soluble natural polysaccharides and a water-soluble acrylamide polymer in water with stirring uniformly, and performing filtration and defoaming to obtain a mixed spinning raw solution containing the natural polysaccharides and the acrylamide polymer; (2) preparation of a water-containing primary gel fiber: performing wet spinning, or dry-wet spinning or gel spinning to the mixed spinning raw solution prepared in the step (1), performing a spinning process at a preset speed, mixing the mixed spinning raw solution with a coagulating bath, to obtain the water-containing primary gel fiber; and (3) radiation crosslinking: drafting the primary gel fiber into an ionizing radiation apparatus and performing the radiation crosslinking to the primary gel fiber prepared in the step (2), and performing a subsequent drafting operation, a thermal-moulding operation, a winding-up operation and a fiber-cutting operation to obtain the double-net hydrogel fiber.

The invention discloses a method for preparing elemental silicon. The method comprises the following steps of: dissolving SiO2 in an alkali metal or alkaline earth metal oxide-containing chloride molten salt, or dissolving alkali metal or alkaline earth metal silicate in the chloride molten salt, wherein the temperature of the chloride molten salt is 600 to 1,000 DEG C, electrolyzing by using graphite or silicon or a metal as a cathode and using graphite or an inert material as an anode to electrically deposit siliconic acid radicals at the cathode, and separating the electrodeposition to obtain the elemental silicon. In the method, the operation temperature is low; raw materials are cheap and available; the molten salt is stable; and the purity of the product is high. The process can be controlled through consistent current; continuous production is easy to be realized; the current efficiency is high; and the production energy consumption and cost of silicon can be obviously reduced.

The invention provides a method for carbonizing and activating waste concrete recycled micro powder by a wet process, which comprises the following steps of: taking powder generated in the process ofproducing recycled aggregate by crushing waste concrete as recycled micro powder, dispersing the recycled micro powder into water to form mixed slurry, and continuously introducing industrial waste gas containing carbon dioxide into the mixed slurry, in the process, carbon dioxide contained in the industrial waste gas and the regenerated micro powder are subjected to a carbonization reaction. According to the invention, the regenerated micro-powder is subjected to the carbonization reaction in an aqueous solution, the activity of calcium carbonate and silicon dioxide generated by carbonizationis higher, the volcanic ash activity is superior to that of common auxiliary cementing materials such as fly ash and silica fume, and the regenerated micro-powder can be used as an auxiliary cementing material.

This invention relates to a method for preparation of refractory active metals or alloys, which comprises the following steps: selecting CaCl2 or mixed salt electrolyte mainly including CaCl2 as flux, coining or perfusing refractory active metals to be block-shaped, sintering them to get sintered cake, compounding sintered cake and liquid of conductive cathode group and making them as cathode, making graphite or inert electrode as anode; making electrolyzation voltage no lower than academic decomposition voltage of melted salt, and making electrochemical reduction carryed out on cathode, but not forming compact sedimentary deposit to prevent the touch of compounds and electrolyte, controlling electrolyzation temperature at 500-1000 degrees, controlling the electrolyzation time according to 1-4 times theoretical electrical energy demand, making sure inert atmosphere in electrolytic process; then getting refractory metals or alloys which is electrolyzation product. The invention has short flow of production, low energy consumption, little contamination, and is easy to product continuously.

The invention discloses a process for preparing lithium hexafluorophosphate by adopting an organic solvent and solubilizer method. The process comprises the following steps of: reacting liquid anhydrous hydrofluoric acid with phosphorus pentachloride to generate phosphorus pentafluoride gas; reacting the phosphorus pentafluoride with lithium fluoride in an organic solvent dissolved with less solubilizer to generate lithium hexafluorophosphate; and filtering reaction slurry to obtain the residual lithium fluoride, cooling down a filtrate for crystallizing, filtering and vacuum drying to obtain a high-purity lithium hexafluorophosphate product. In the process for preparing the lithium hexafluorophosphate by adopting the organic solvent and solubilizer method disclosed by the invention, various raw materials are cheap and easy to obtain, and the production cost is low; the organic solvent with a few dissolved solubilizers is taken as a reaction medium, thus continuous production is easy to implement due to the reaction conditions, the reaction efficiency is high, the yield of the lithium hexafluorophosphate product is over 92%, and the purity of the lithium hexafluorophosphate product can reach more than 99.9%; in addition, the lithium hexafluorophosphate product prepared by the process disclosed by the invention is suitable for being used as an electrolyte of lithium ion batteries and the like.

The invention discloses a method for preparing nanoclay/styrene-butadiene rubber powder modified asphalt by adopting the spray drying method. The method comprises the following steps: preparing a clay suspension; preparing a mixed liquor of the clay suspension and butadiene-styrene latex; spray-drying the mixed liquor to prepare clay/butadiene-styrene rubber powder, so as to serve as an asphalt modifier; mixing the asphalt modifier with matrix asphalt according to a certain proportion, and shearing with a high speed shearing machine, so as to obtain the nanoclay/styrene-butadiene rubber compound modified asphalt. The preparation method provided by the invention is simple in process and low in cost, and at the same time the prepared compound modified asphalt has excellent high-and-low temperature performance and ageing resistance, and is also improved in the storage stability.

The invention provides a method for open type carbonization strengthening of waste concrete recycled aggregate, which comprises the following steps: crushing waste concrete to obtain granular recycledaggregate, soaking the granular recycled aggregate in water, continuously introducing industrial waste gas containing carbon dioxide, in the soaking process, performing a carbonization reaction on carbon dioxide contained in the industrial waste gas and mortar attached to the surface of the granular recycled aggregate. A carbon dioxide sealing carbonization device is not needed, continuous production is easy, and carbon dioxide industrial waste gas with different concentrations can be utilized.

The invention discloses a method for preparing high-purity ammonium fluosilicate. The method comprises the following steps of: (1) feeding fluorosilicic acid of which the concentration is not less than 10 percent and liquid ammonia into a reaction tank for neutral reaction, when a pH value of a reaction system reaches 3 to 5, reaction is finished; (2) pumping a reaction liquid into a low-temperature flash evaporation concentration system to perform low-temperature flash evaporation in a vacuum state, removing a large amount of water in a neutral liquid of the ammonium fluosilicate, concentrating to a saturated state, and then precipitating crystal, wherein steam generated during flash evaporation is subjected to despumation and is discharged to atmosphere air; (3) introducing a solution after flash evaporation into a setting tank, and discharging a material containing ammonium fluosilicate crystal from the setting tank; and (4) filtering the discharged material, and thus obtaining a high-purity ammonium fluosilicate product with purity over 90 percent, wherein a filtering liquid is returned to the reaction tank of neutral reaction for recovery. According to the method, the ammonium fluosilicate crystal product with purity over 90 percent can be produced, energy consumption of a process is low, operation is safe and reliable, continuous production is easy to realize, and the method is applicable for comprehensive utilization of a fluorine resource of a large-scale phosphate fertilizer enterprise.

The invention discloses a separation method of nickel in a sulfate solution. The separation method includes the steps of: adjusting the pH value of a solution after cobalt extraction to 7-10 via a complexing neutralizer, and extracting and separating nickel with 260# solvent oil as a diluent and a nickel extraction agent as an organic phase to obtain an organic phase supporting nickel and a sulfate raffinate; and washing and reversal-extracting the organic phase supporting nickel to prepare a reversal-extract containing nickel and an organic phase. The method can effectively separate nickel ina high-concentration sulfate solution, is low in energy and reagent consumption, has short operation process, is low in equipment demand and can easily achieve continuous operation.

The invention discloses a continuous preparing technology of advanced-pore-state foamed aluminum balls. A device is used for continuously producing APM foam padding balls in a batched manner. According to the technical scheme, Al powder, Si powder and TiH2 powder mixed powder which are evenly mixed and have a certain mass ratio are added into a hot pressure machine, cracked portions on the edge of a board subject to hot pressing are cut off through a reversible type hot rolling machine, and a prefabricated board with a certain compactness is obtained; the prefabricated board subject to hot rolling in the second step is cut into a plurality of strip-shaped foaming precursors with the square section through a cutting roller, then the precursors enter a limiting flat roller, the strip-shaped precursors stretching by a certain length are cut into cubic small blocks with a certain specification through a flying shear, the cubic small blocks enter a high-temperature electric heating tunnel furnace through a conveying belt, and the blocks are subject to temperature rise and foaming in the electric heating tunnel furnace; when the foaming bodies are subject to temperature rise and expand to be in the near spherical shape, the foaming bodies enter an atomizing area, atomized cooling water is sprayed out, and the balls are rapidly cooled and molded.

The invention relates to the technical field of pharmacy, in particular to a dacomitinib quick-release preparation and a preparation method thereof. The dacomitinib quick-release preparation is prepared by the following steps: taking hydroxypropyl methylcellulose phthalate acetate or hydroxypropyl methylcellulose phthalate as a dispersion carrier material, adding a sugar alcohol functional auxiliary material as a plasticizer, performing high-temperature extrusion on the plasticizer and a dacomitinib bulk drug by virtue of a hot melt extruder, performing cooling and crushing, fully mixing a crushed mixture with a filler, a disintegrating agent and a lubricating agent, and performing tabletting directly to prepare the preparation. According to the dacomitinib quick-release preparation, the problems of poor solubility and poor in-vitro dissolution of dacomitinib are solved, the in-vivo bioavailability of dacomitinib is improved, and finally, the treatment effect is improved. The preparation method is simple in process, free of organic solvent, high in automation degree, easy for continuous production and suitable for industrial production.

The invention discloses a five-layer co-extruded solar cell back plate containing PP and a preparation method thereof, belonging to the technical field of solar cell back plate. The outer weathering layer and the structure reinforcing layer are fixed together by an outer adhesive layer, and the structure reinforcing layer and the inner weathering layer are fixed together by an inner adhesive layer. The outer weathering layer and the structure reinforcing layer are fixed together by an outer adhesive layer. The invention adopts a co-extrusion process to melt each layer of material into different flow channels and directly extrude and mold, the operation process is simple, and it is difficult to separate the adhesive layers and the adhesive layers are not likely to fall off. As that preparation method of the invention can not only simplify the processing process, but also has good weatherability, mechanical property and long-term stability; meanwhile, no organic solvent is use in the preparation process, and the preparation method is environmentally friendly and green.

The invention discloses a boron-containing shape memory alloy and a preparation method thereof. The boron-containing shape memory alloy is prepared from Ni, Ti, Zr and B, and the chemical formula of the boron-containing shape memory alloy is Ni < 51-y > Ti < 49-x > Zr < x > By, wherein, x is equal to 1.0-5.0, y is equal to 1.0-3.0, and x and y are the mole percent of Zr and the mole percent of B in the alloy respectively. According to the boron-containing shape memory alloy, a boron element is added to form TiB2 particles with the nanoscale, the TiB2 particles serve as heterogeneous nucleation cores to refine a matrix structure to improve the strength of the alloy and improve the plasticity of the alloy, and therefore the alloy has the advantages of being high in toughness and elasticity and good in recoverability, and the use requirements of the shape memory alloy on high thermal stability and excellent plasticity can be met; and the preparation method of the boron-containing shape memory alloy is simple in overall process, easy in control, easy in realizing continuous production and low in production cost.