81results about How to "Mild temperature" patented technology

The invention relates to a method for preparing CuInS2 nanoparticles by solvent thermosynthesis using biomolecules, which comprises the following concrete steps: firstly, preparing a copper source solution, then adding an indium source into the solution, evenly mixing, and adding a sulfur source into the mixed solution; dropwise adding an inorganic alkaline solution to regulate the mixed solution to be weakly alkaline, and evenly stirring; and finally, putting the solution in a high-pressure reaction kettle, reacting at constant temperature for a period of time, cooling, washing with a solvent, and drying to obtain the CuInS2 nanoparticles. By using nontoxic biomolecule L-cysteine as the sulfur source, the invention avoids the emission of toxic gas and lowers the technique cost. The L-cysteine can be used as both a sulfur source and a guide agent for reaction, is favorable for generating products with special structure and pattern and excellent photovoltaic properties, and develops a new way for synthesizing other semiconductor photovoltaic materials.

The invention relates to a catalyst used for direct preparation of light olefin from synthetic gas, a preparation method and an application thereof. According to the invention, a parallel flow precipitation method is used to highly disperse Fe and auxiliary agents on surfaces of self-made alkaline carriers, and thus a catalyst load is low, a preparing technology is simple and a cost is lower than that of product with a same type. When the catalyst is used for direct preparation of the light olefin from the synthetic gas, a CO conversion rate can reach 75-85 % under a one-way catalytic condition of the synthetic gas, an alkene-alkane ratio can reach 4.5-6.0 in organic gas products, an alkene weight is 50-60 % and more than 98% of the liquid product is water. The catalyst is good in abrasion resistance and pressure resistance, and can be used for slurry beds and fixed beds. A reaction technology of the catalyst is that the temperature is 200-500 DEG C, a pressure is 0-5 MPa, and an air speed of the synthetic gas is 600-2400 <-1>.

The invention provides a power generation method, comprising a step of condensing exhausted steam generated in the power generation process, wherein a heat exchange operation is directly or indirectly carried out between the exhausted steam and gas obtained after expanded depressurization. The invention further provides a device for gasified production of energy sources and thermal power generation. The device comprises an expansion depressurization device and a condenser, wherein the expansion depressurization device comprises an expansion depressurization inlet for receiving gas to be subjected to an expanded depressurization operation, and an expansion depressurization outlet for discharging the gas subjected to the expanded depressurization operation; and the condenser comprises a first heat exchange channel in which a cooling medium with the refrigerating capacity of the gas subjected to the expanded depressurization operation enters, and a second heat exchange channel in which the heat exchange operation is carried out between the exhausted steam generated in the power generation process and the cooling medium. According to the method and the device disclosed by the invention, the refrigerating capacity generated by the gas subjected to the expanded depressurization operation is used, so that the temperature of the exhausted steam is reduced below an environmental temperature, therefore the pressure energy of the gas is sufficiently used, and the power generation efficiency of turbine power generation equipment is improved.

The invention provides an industrial production method of acrylonitrile, which comprises that the air, propylene and ammonia are subjected to ammoxidation inside a reactor and generate a reaction gas containing the acrylonitrile; the reaction gas enters a first tower and shock cooling, neutralization and cooling are achieved; the reaction gas which is subjected to shock cooling, neutralization and cooling enters a second tower and the water absorbs organic materials contained in the reaction gas; the water absorbing liquid enters a third tower, the acrylonitrile, hydrocyanic acid and water vapor steamed out by the third tower are subjected to condensation, and then separation of an aqueous phase and an organic phase is achieved in a quantizer of the third tower; the water phase inside the quantizer of the third tower are delivered to the third tower; the water phase introduced from a last piece of tower plates of a tower kettle of the third tower is subjected to heat exchange and then serves as absorbing water of the second tower; a gas phase containing acetonitrile is extracted from the side lines of the third tower and sent into a fourth tower and a rough acetonitrile product is obtained; and the organic phase in the quantizer of the third tower enters a fifth tower and a sixth tower sequentially and hydrocyanic acid and a acrylonitrile product are respectively obtained. According to the method, the reliability of a device is improved and the energy utilization is high.

The invention relates to a method for producing isopropanolamine by a liquid ammonia process, mainly solving the problems such as high device investment, high energy consumption in dehydration and many by-products due to the fact that water is used as a catalyst in the prior art. The method has the advantages that anhydrous liquid ammonia and propylene oxide are used as raw materials for reaction,a tubular fixed bed reactor and an adiabatic fixed bed reactor are provided to ensure complete conversion of the propylene oxide, and the tubular fixed bed reactor removes heat of the hot water preheated reaction raw materials and reaction products under reduced pressure through heat removal of circulating hot water, so that most of reaction heat can be recycled; most of ammonia of the reaction products is recycled through a flash tank, and residual ammonia is recycled by an ammonia stripping tower with an compressor at the top; few by-products are generated, equipment investment and device energy consumption can be reduced, and the method can be applied to industrial production of the isopropanolamine.

The invention belongs to the field of chemical engineering, and particularly relates to a preparation method of resorcinol, which comprises: (1) carrying out a diazotization reaction on m-aminophenoland a sodium nitrite solution in a dilute solution of concentrated sulfuric acid to generate m-aminophenol diazonium salt, with the diazotization reaction temperature being 0 DEG C or below; (2) carrying out a hydrolysis reaction on the m-aminophenol diazonium salt in the presence of an organic solvent and water to obtain a resorcinol crude product, with the volume ratio of the water to the organic solvent being (0.5-1.5):(4-6); (3) carrying out post-treatment on the resorcinol crude product to obtain a product resorcinol, wherein the post-treatment step sequentially comprises: (i) an extraction stage; (ii) a vacuum distillation stage; (iii) a pickling stage; and (iv) refining, washing and drying stages. By using the method disclosed by the invention, the resorcinol yield can be greatly improved.

The invention relates to a synthesis method of hydroquinone. The method is characterized by comprising the following steps: carrying out catalytic oxidation on phenol and oxygen to generate a mixture of p-benzoquinone and o-benzoquinone, wherein a catalyst is copper and sodium complex salt; distilling to remove solvent, adding water in residual materials, and separating p-benzoquinone and o-benzoquinone by distillation; reducing separated p-benzoquinone with a reducing agent to obtain hydroquinone, filtering out hydroquinone crude product and recrystallizing so as to obtain hydroquinone crystal; and concentrating a mother liquid obtained by filtering out hydroquinone or catechol crude product to obtain an ammonium sulfate fertilizer. The synthesis method has simple process, mild reaction conditions and short reaction period, and the yield of hydroquinone in the product is larger than that of catechol.

The present invention relates to a crude glycerin treatment and applications of the same in epichlorohydrin production. The present invention relates to a crude glycerin treatment method, which comprises: (a) adding hydrogen chloride gas to crude glycerin to precipitate insoluble solids; and (b) filtering to remove the precipitated solids to obtain the treated glycerin.

The invention discloses a process for preparing bamboo-wood floor capable of repelling ants and mosquitoes. The process includes the following steps: (1) material preparation; (2) rough milling; (3) cooking and carburization; (4) drying; (5) artificial selection; (6) finish milling; (7) splicing and pressing; (8) trying plane; (9) all-side slotting; (10) end face mortising; (11) soaking; (12) secondary drying; (13) polishing and carving; (14) painting. According to the process provided by the invention, zanthoxylum bungeanum and lavandula angustifolia ingredients permeate through the bamboo-wood floor; zanthoxylum bungeanum has the function of repelling ants, and lavandula angustifolia has the function of repelling mosquitoes, so that the bamboo-wood floor can prevent ants from boring and repel mosquitoes during the using process; in addition, the natural fragrance of lavandula angustifolia can emanate slowly and make the living environment more pleasant; the floor is coated with only one layer of varnish which is good in air permeability and transparency; under the condition of not affecting the function of repelling ants and mosquitoes, the natural textures and colors of the bamboo-wood are fully exposed, which are elegant and dignified.

The invention relates to the field of chemical nickel plating methods and discloses a stainless steel product barrel plating method and an activating solution. The barrel plating method comprises thefollowing steps: soaking to deoil; electrolytically deoiling; pickling; stirring a strong oxidant, ammonium hydrogen fluoride, a strong acid agent and a corrosion inhibitor to uniformly mixing components to obtain the activating solution, wherein the mass ratio of the strong oxidant, ammonium hydrogen fluoride, the strong acid agent and the corrosion inhibitor is (15-20): (5-10): (3-5): (3-8); introducing the activating solution into an activating groove and putting a stainless steel to-be-plated product into the activating groove for activation; carrying out nickel preplating; and controllinga porous roller to rotate, putting the stainless steel to-be-plated product in the porous roller, and introducing a chemical nickel-plating solution into a chemical nickel-plating groove for barrel plating to obtain a stainless steel nickel plating product. According to the stainless steel product barrel plating method, the bonding property of a matrix and a nickel layer can be improved, and theplating thickness and the surface quality uniformity can be improved.

The invention relates to the field of rack deplating methods, and discloses a method for removing a nickel coating on a rack and a deplating solution. The method comprises the following steps: addinga strong acid agent, a strong oxidant, a complexing agent, a corrosion inhibitor and a stabilizer into a liquid preparation tank, and carrying out stirring operation to uniformly mix all the components to obtain the deplating solution, wherein the mass ratio of the strong acid agent, the strong oxidant, the complexing agent, the corrosion inhibitor and the stabilizer is (40-60):(100-200):(20-60):(0.1-0.5):(10-20); and feeding the deplating solution into a deplating tank, placing the rack to be deplated into the deplating tank at the temperature of 25-40 DEG C, and carrying out stirring and deplating operation to obtain the deplating rack. Compared with the prior art, the method has the advantages that the nickel coating of the rack can be quickly removed after being soaked at normal temperature instead of heating and electrifying, the service life of the deplating solution is long, no corrosion is caused to a rack substrate, no harmful gas is generated, the cost can be saved, and the environment-friendly and economical purposes of social multi-requirements are met.

The invention relates to a catalytic combustion reactor and process for removing hydrogen in tail gas. The reactor comprises three cavities from center to outer sides. The center of the reactor is filled with catalyst for catalyzing the chemical reaction of gas containing hydrogen and the air, so that catalytic combustion reaction of the tail gas containing the hydrogen and the oxygen in the air by the aid of the catalyst without heating and pressurizing, and the hydrogen can be removed. The reactor is widely applicable to hydrogen removing of the industrial tail gas, also capable of removing CO and reducing substances such as alcohol like methyl alcohol and ethyl alcohol and hydrocarbons in the tail gas, and especially suitable for processing the anode tail gas of fuel batteries.

The invention discloses a phase-change hot compress eye mask. The phase-change hot compress eye mask comprises a heating bag and a hot compress bag. The heating bag and the hot compress bag are arranged separately and connected mechanically. The hot compress bag is used for hot compress of eyes. A phase-change heat storage bag is arranged in the hot compress bag. A heating device is arranged in the heating bag, and is used for heating the phase-change heat storage bag. The invention further discloses a phase-change hot compress eye mask. The phase-change hot compress eye mask comprises a hot compress bag used for hot compress of the eyes. At least one phase-change heat storage bag and at least one heating device are arranged in the hot compress bag. The heating devices are used for heatingthe phase-change heat storage bags. The phase-change hot compress eye masks have the advantages of safety in use, convenience, rapidness, good hot compress effect, reusability and low cost.

The invention discloses sodium 8-(2-hydroxylbenzamido)caprylate and a preparation method therefor and belongs to the field of preparation of compounds. A key of the technical scheme of the invention is as follows: the preparation method comprises the steps: mixing salicylic acid with tetrahydrofuran, adding N,N-carbonyl diimidazole, adding 8-amino ethyl caprylate hydrochloride, and dropwise addingtriethylamine; carrying out a concentrating reaction solution until no solvent is distilled off, adding dichloromethane for dissolving, and carrying out washing once separately with diluted hydrochloric acid, a saturated sodium carbonate solution and a saturated saline solution, so as to obtain an intermediate I; mixing a sodium hydroxide solution with the intermediate I, and carrying out stirring until solids are dissolved; cooling the temperature of a reaction solution to 10 DEG C or below, dropwise adding diluted hydrochloric acid, adjusting a pH value of a reaction solution to 4.5 to 5, and carrying out solid precipitation, so as to obtain free acids; and dissolving the free acids with isopropanol, dropwise adding a sodium hydroxide solution, carrying out a reaction for 1 to 1.5 hours, supplementing isopropanol, and continuing to carry out stirring for 1.5 to 2 hours. The method has the advantages that steps are few, the yield of each step is high, the product purity is good, impurities are more easily controlled, and raw materials are more readily available.

The invention provides a method for preparing taurine. An adopted heterogeneous catalyst system can greatly improve the technological conditions for preparing taurine from sodium isethionate, and in addition, byproducts including ethanolamine, ethylene glycol and dipolyethylene glycol are removed through a high-temperature spray dryer, and complete application of effective components of mother liquor is achieved. Compared with the traditional process, the process has the advantages that the reaction temperature and pressure conditions required by the ammonolysis reaction of the sodium isethionate are milder, and meanwhile, the reaction time is also shortened. The method realizes complete application of effective components in the mother liquor, significantly improves the total yield of taurine, is easy for industrial production, and reduces the production cost of the product.

The invention discloses a bamboo floor preparation method. The bamboo floor preparation method comprises the process steps of (1) material preparation, (2) rough milling, (3) cooking and carbonization, (4) drying, (5) manual picking, (6) finish milling, (7) extrusion, (8) flat planing, (9) four-surface grooving, (10) end surface tenoning, (11) dipping, (12) secondary drying, (13) polishing and carving and (14) painting. Pure bamboo boards are used for manufacturing floors; through special process treatment, the bamboo floors are impregnated in the components of peppers and lavenders; the peppers achieve the ant dispelling effect, and the lavenders achieve the mosquito dispelling effect, so that the ant drilling corrosion can be prevented in the use process, and mosquitoes are dispelled; natural fragrance of the lavenders is slowly dissipated, so that the living environment is more pleasant; and a layer of ventilation varnish with good transparency is only sprayed on the floors, so thatnatural textures and colors of the bamboos are fully shown under the condition of not influencing the mosquito dispelling function to achieve elegance.

The invention relates to an alkoxyether dendrimer/gelatin composite cryogel, a preparation method and applications thereof. According to the present invention, a series of intelligent hydrogels with characteristics of moderate mechanical properties, oriented porous structure and temperature response are prepared by using gelatin modified with methacrylic anhydride and alkoxyether dendron with excellent temperature sensitive behavior as raw materials and by adopting a redox reaction through a one-way freezing method, wherein the pore size and the mechanical properties of the gel can be adjustedby regulating the ratio of different components and the cooling rate; the method is simple, safe and effective, and does not use organic solutions; the results of cell culture show that the gel has good adhesion to cells, the cells have high survival rate, and the growth morphology of the cells is controlled by the pore size and the morphology of the gel; and the obtained hydrogel can be used forthe simulation of cell matrixes, and can further be used in other tissue engineering and drug controlled release.