32results about How to "Reduce the liquid-solid ratio" patented technology

The invention relates to relates to a method for pretreating cellulosic biomass, which comprises the following steps: before or after the cellulosic biomass is mechanically crushed, or when the cellulosic biomass is mechanically crushed, the cellulosic biomass is contacted with a chemical drug capable of degrading the cellulosic biomass, and the heat generated due to mechanical crushing is used for increasing the temperature of a mixture of the cellulosic biomass and the chemical drug.

A process for preparing high-purity ammonium paramolybdate from ammonium polymolybdate as raw material includes adding purified water and ammonia water, heating while stirring, stirring under a certain steam pressure for evaporation crystallizing while boiling the solution, concentrating, solid-liquid separation, and baking. Its advantages are high purity and high crystallizing rate (94.5-96%.

The invention provides the preparing method of aluminum oxide, comprising preparing ore pulp, digest, diluting ore pulp, separating and washing red mud, disassembling seed crystal, separating and washing aluminum hydroxide, calcining aluminum hydroxide, evaporating mother liquid and causticizing soda solution. The invention adopts pressing filter to replace hydro-separator at the course of separating and washing red mud. The method is in favor of the reclamation of Na2O and Al2O3, and the invention has the advantages of saving cost, short process flow and little apparatus.

The invention discloses a method for recycling phosphorus from sludge ash. According to the method, sludge incineration ash is taken as a raw material and undergoes first extraction with a sulfuric acid solution, then the obtained extraction liquid is mixed with a concentrated sulfuric acid solution according to a volume ratio of 28.8:1.2 to 28.4:1.6, so that a new extracting agent is prepared andused to extract the remaining sludge ash; and if necessary, the sludge ash can be divided into multiple parts for multiple extraction, and an extracting agent used in a next extraction is formed by mixing an extraction liquid obtained after a previous extraction with a concentrated sulfuric acid solution. In the method of the present invention, the extraction liquid is used as an extracting agent, so that discharge of waste liquid is greatly reduced, and after cyclic extraction, the extraction rate of phosphorus in the sludge ash can exceed 96%, and the concentration of phosphorus in a finalextraction liquid exceeds 21-23 g/L, thereby effectively solving the technical problems of low phosphorus extraction rate, large consumption of chemicals and large amount of waste liquid in the priorart.

The invention discloses a preparation method of a trimeric cyanamide cyanurate flame retardant and belongs to the technical field of chemical industry. The method comprises the following steps of: (1) adding 100-120 parts by weight of water used as a solvent into a reaction container, successively adding 4-6 parts by weight of a catalyst and 10-15 parts by weight of melamine, uniformly stirring and heating to 65-75 DEG C, adding 10-15 parts by weight of cyanuric acid, stirring and heating to 95 DEG C, beginning insulation, adjusting pH value of the system to 9-10, continuously stirring and reacting for 45-65 min; and (2) centrifuging the obtained reaction product by the use of a centrifuge, recovering a filtrate, drying the solid product at 100-120 DEG C, and crushing to 1.0-4.0 microns so as to obtain the trimeric cyanamide cyanurate flame retardant.

The invention belongs to the technical field of flower essential oil extraction, and in particular relates to a method for extracting rose essential oil by a molecular sieve extracting agent. By utilization of the selective adsorption effect of the molecular sieve, the soakage capability of the extracting agent on the rose as well as the emulsification and solubilizing effects on the essential oil in the rose are improved, and the dispersing amount of the essential oil in the rose in the extracting agent is increased. Fresh incompletely bloomed roseleaves, of which the receptacles are cut, are subjected to pretreatment, extraction, filtration under reduced pressure, steam distillation and oil-water separation, the obtained product does not contain pigment, is pure and bright and has fragrant and strong odor, the yield is 0.020 to 0.025 percent, and the extraction rate of the essential oil is 11 percent higher than that of the essential oil in the traditional industrial extraction method. The molecular sieve extracting agent with the selective adsorption effect instead of an organic solvent is used for extracting the rose essential oil for once in a water solution, so the problem of environmental pollution is solved, the problems that the traditional extraction process has high energy consumption and low oil yield are solved, and the method has the advantages of recyclability of the molecular sieve extracting agent, operation safety, low production cost and the like.

The invention discloses a method for selective zinc immersion through cyclone classification-ionic liquid-ultrasonic cooperation, and belongs to the technical field of hydrometallurgy. The method comprises the steps of graded enrichment of zinc-containing dust mud, synthesis of ionic liquid and selective leaching of zinc. According to the method, the special-shaped hydrocyclone is used for pretreating the zinc-containing dust sludge to obtain fine-grain zinc-rich dust sludge, so that efficient leaching of zinc is facilitated, and meanwhile, opening and dispersing of floccules in the zinc-containing dust sludge are facilitated; the ionic liquid and ultrasonic synergistic leaching system has selective dissolving capacity on ZnO, the obtained zinc-containing leaching solution is high in purity, and the problems that components are complex, separation is difficult and the like in a traditional leaching system are solved.

The invention provides a preparation method of an in-situ crystallization catalytic cracking catalyst. Specifically, an in-situ crystallization process is adjusted, that is, the method comprises the steps of firstly mixing roasted soil balls and a sodium hydroxide solution for crystallization, and directly adding a guiding agent for crystallization without adding any external silicon sources to directly obtain an in-situ crystallization product with high crystallinity, a large pore volume and a low bulk density, and the method provided by the invention avoids a conventional method of adding special functional components into kaolin microspheres to improve a pore structure and improve crystallinity; the method provided by the invention reduces the production costs of the in-situ crystallization product, specifically, the raw material costs are low, and additional silicon sources are not required to be added; in the synthetic process, the liquid-solid ratio is reduced, and the single-kettle yield is increased; and after the in-situ crystallization product is modified by rare earth, the conversion rate of heavy oil can be increased, and the yield of a target product is increased.

The invention discloses a myrciaria cauliflora leaf-based handmade soap and a preparation method thereof. The preparation method comprises the following steps: mixing a transparent soap base and rosehydrolat, heating in a water batch for dissolving, then adding four types of base oils, namely sweet almond oil, wheat germ oil, jojoba oil and olive oil respectively, as moisturizing agents, and thenadding a myrciaria cauliflora leaf extract concentrate and a semiaquilegia adoxoides extract concentrate, dripping in citronella essential oil and mint essential oil, uniformly stirring, moulding, standing, ventilating and drying to obtain the myrciaria cauliflora leaf-based handmade soap. The handmade soap prepared by the preparation method provided by the invention, is light brown, semitransparent, natural, safe, mild, smooth and rich in aroma, contains myrciaria cauliflora leaf fragrance, rose fragrance, citronella fragrance and mint fragrance, is a multifunctional handmade soap with antioxidant, antibacterial, itching-relieving, mosquito-repellent effects and the like.

The invention discloses a method for promoting uranium ore leaching by applying a magnetic field. The method comprises the steps that (1) a leaching solution is magnetized through a pipeline, a magnetic field generator is arranged outside the pipeline, and the leaching solution is any one of an acid leaching solution, an alkaline leaching solution or a neutral leaching solution; and (2) the magnetized leaching solution is introduced into a liquid injection drill hole to be injected into an underground uranium ore layer, and then solute is lifted to the earth surface through a liquid extraction hole away from the liquid injection drill hole by a preset distance. According to the scheme, more dissolved oxygen can be provided for the oxidation leaching process of uranium, and therefore the oxidation leaching process is enhanced, blockage of calcium sulfate crystals to a leaching solution seepage channel can be reduced, and the migration capacity of the solute is improved.

The invention provides a preparation method of an in-situ crystallization type catalytic cracking catalyst. The preparation method specially comprises the steps that by adjusting an in-situ crystallization technology, that is, roasted soil balls and a sodium hydroxide solution used for crystallization are mixed firstly, then a guiding agent is directly added for crystallization, any additional silicon source does not need to be added, and thus an in-situ crystallization product with the high crystallization degree, large pore volume and low heap ratio is obtained. Through the preparation method, a conventional method for adding special functional components into kaolin microspheres to improve a pore structure and increase the crystallization degree is avoided; the production cost of the in-situ crystallization product is lowered, as for specific embodiment, the raw material cost is low, and the additional silicon source does not need to be added; and in the synthesis process, the liquid-solid ratio is lowered, and the single-kettle yield is increased.

A waste incineration fly ash ultrasonic washing device is disclosed, a fly ash ultrasonic washing unit comprises a fly ash ultrasonic washing container, and the fly ash ultrasonic washing container is provided with a fly ash pneumatic conveying and entering area, a fly ash washing and dissolving area and a fly ash settling area; and the fly ash washing and dissolving area is located on the lower portion of the fly ash pneumatic conveying and entering area and provided with an ultrasonic assembly. The fly ash settling area is positioned at the lower portion of the fly ash washing and dissolving area; a fly ash conveying unit is connected with the fly ash pneumatic conveying and entering area, and the fly ash conveying unit conveys fly ash to the fly ash pneumatic conveying and entering area; and a spraying unit is connected with the fly ash pneumatic conveying and entering area and is used for spraying the fly ash of the fly ash conveying unit. According to the waste incineration fly ash ultrasonic washing device, the dissolution rate of chlorine salt in the fly ash and the dissolution and flocculation of heavy metal ions can be improved to the greatest extent, the cost is low, and the benefit is high; the liquid-solid ratio is relatively low, water resources are saved, the dehydration performance of the washed fly ash is improved, and the water content of the dehydrated washed fly ash is reduced; and continuous washing and discharging can be realized.