40results about How to "Process energy consumption is low" patented technology

The invention discloses a method for preparing sodium thiocyanate by using desulphurization waste liquid of coke oven gas, and belongs to the technical field of utilization of desulphurization waste liquid of the coke oven gas. The method comprises the following steps: using the desulphurization waste liquid of the coke oven gas as a raw material, firstly, filtering the waste liquid in vacuum, using tributyl phosphate to extract thiocyanate radicals in the waste liquid, then using sodium hydroxide solution to back-extract the extract, and finally concentrating and crystallizing the extract, and washing and drying the crystals to obtain sodium thiocyanate crystals. The method uses the desulphurization waste liquid of the coke oven gas to prepare a sodium thiocyanate product with the purity as high as 93 to 95 percent so as to change waste into valuable and makes full use of waste resources; and the method is simple, saves energy, has no three-waste discharge, is favorable for environmental protection, has low production cost and good economic benefit, and develops a new path for the utilization of the desulphurization waste liquid resources of the coke oven gas. The sodium thiocyanate product prepared by the method can be widely applied in the industries of medicaments, textile, printing and dyeing, pesticide, chemistry and the like.

The invention belongs to the technical field of chemical engineering and discloses a new process for preparing sodium thiocyanate. The new process for preparing sodium thiocyanate comprises that coked gas PDS process desulphurized mixed salt is taken as a raw material, firstly sodium thiocyanate inside the raw material is extracted with methyl alcohol, then filter pressing is carried out, so that sodium thiocyanate filtrate is obtained, and finally evaporation concentration, cooling crystallization and centrifugal drying are carried out, so that sodium thiocyanate crystals are obtained. Sodium thiocyanate prepared by adopting the new process disclosed by the invention has high purity and good market prospect, desulphurization waste is effectively utilized, a waste material is changed into things of value, industrial raw material cost is greatly reduced, and occupying area is also reduced to some extent, so that an enterprise can make up the deficits and get surpluses.

The invention discloses a treatment method of electroplating effluent containing heavy metal ions. The method comprises the following steps: firstly, performing standing pretreatment on the electroplating effluent, performing filtration, adding a flocculant and a coagulant aid, performing coagulation and sedimentation for 1-1.5h, adding filtered effluent to an adsorption tank, adding nanometer particles of which nuclear cores are made from Fe3O4 and shell layers are made from SiO2 to serve as an adsorbent, wherein the shell layer edges of nuclear shell structure granules are modified with an aza-macrocyclic carboxylic acid derivative derivative, performing adsorption treatment for 2-6h, then performing filtration, and adding the obtained filtrate to a post-treatment system or a water recovery tank. According to the method, the heavy metal ions in electroplating effluent can be effectively removed, and the method is low in treatment cost, energy-saving and environmentally friendly.

The invention relates to a process of extracting zinc from dedusting ash of a blast furnace, and belongs to the technical field of comprehensive utilization of metallurgic solid wastes. The process comprises the steps of a ball milling process, a magnetic separation process, a flotation process, a filter pressing process, a waste water recovery process, a caustic soda flake leaching process and electrolysis. In the caustic soda flake leaching process, sodium hydroxide is firstly added in tailing slag for filter pressing; then, sodium sulfide is added in filtrate for filter pressing again; and bone glue or potassium alkyl diphenyl ether sulfonate is added in the filtrate for electrolysis. The process can effectively extract zinc elements from the dedusting ash of the blast furnace through the caustic soda flake leaching process; and the whole process is low in energy consumption, environment-friendly and high in recovery rate of zinc.

The invention discloses a method for preparing a Chinese medicinal composition for preventing and treating menoxenia. The method comprises the following steps of: preparing a certain amount of certain raw material medicaments (motherwort, nutgrass galingale rhizome, beautiful sweetgum fruit, Szechuan lovage rhizome and cowherb seed) into water-extracted thin extract by adopting water extraction and concentration or water-extracted alcohol-precipitated thin extract by adopting water extraction and alcohol precipitation; then putting dextrin or starch and the like serving as substrates into a one-step granulator, and spraying the water-extracted thin extract or the water-extracted alcohol-precipitated thin extract serving as adhesive into the one-step granulator to perform one-step granulation; and finally, reshaping the granules, and adding other auxiliary materials to prepare a Chinese medicinal preparation for oral administration. The method can obviously reduce the amount of the auxiliary materials, shorten the processing, concentration, drying and heating time and avoid destroying effective ingredients of the Chinese medicinal composition; the prepared granules have good fluidity, and the pressed tablets are quicker to disintegrate; and the process flow is simplified, the energy consumption is reduced, the production process is not easily polluted, and the quality of the finished product is well guaranteed.

The invention relates to the field of environmental protection, in particular to a process for treating mixed waste salt through a chemical oxidation method. The process comprises the steps that wastesalt slurry is formed firstly; solid salt and dissolved salt are in a dissolution-crystallization equilibrium state, and toxic substances contained in the waste salt are further scattered in water; then, a large amount of insoluble organic pollutants are separated with a layering technology, and the operation load of chemical oxidation is reduced; the usage amounts of oxidizing agents, additivesand catalysts are reduced; and next, residual organic pollutants are removed under the effect of magnetic chemical oxidation catalysts completely. According to the process, evaporation and concentration of waste water are not required, and high-temperature calcination is not required, either; the energy consumption of the process is low, and the process is suitable for treating different kinds ofmixed waste salt, and is high in applicability; the problem for treating the waste salt in the chemical industry, pesticide industry, pharmaceutical industry, dye industry and other industries can besolved, and the process is a waste salt harmless treatment method with low investment and energy consumption.

The invention discloses a solution for the surface metallization pretreatment of a semiconductor P / N type refrigerating sheet and an application method of the same. In the invention, the solution consists of the following components in percentage by volume: 5-52% of hydrochloric acid, 5-36% of nitric acid, 0-28g / L of surfactant and the remaining of water. As the surface metallization pretreatment is performed on the semiconductor P / N type refrigerating sheet by using the solution disclosed by the invention, the rejection rate of the semiconductor P / N type refrigerating sheet can be reduced, the application of a metal nickel material is reduced, and the technical process of the surface metallization pretreatment can also be shortened to reduce the production cost; and moreover, the bonding force of a base material and a metallized layer can be increased, and the temperature difference and performances of the refrigerating sheet can be improved.

The invention relates to a preparing method for compressible saccharose .The method comprises the steps that saccharose serves as a main raw material, a crystallizing resisting agent and talcum powder serve as auxiliary materials, a fluidized bed is used for spraying drying, and compressible saccharose particles are obtained .The method is simple in technological process and small in investment and energy consumption; besides, the obtained compressible saccharose is good in compressibility and mobility, high in uniformity and free of agglomeration .

The invention provides a method to separate vanadium, titanium and iron from vanadium titano-magnetite. The method includes the steps that the vanadium titano-magnetite is crushed to produce ore withparticle size less than 15 mm, the ore is classified with an iron ore particle size classifier to obtain ore with particle size 0-1 mm and ore with particle size 1-15 mm; the ore with particle size 0-1 mm is pelletized to produce pellets, and the ore with particle size 1-15 mm, the pellets and 1-15 mm residual carbon are mixed to produce mixed materials; the mixed materials are placed into a rotary kiln, high volatile coal is added to the rotary kiln to reduce the mixed materials as a reducing agent and obtain reducing materials; a dry film drying separator is used for separating the reducingmaterials to obtain vanadium titanium-rich tailings and iron powder; the iron powder is melted at high temperature to obtain vanadium titanium-rich slag and semi-steel in a melting electric furnace; and the vanadium titanium-rich tailings, vanadium titanium-rich slag and semi-steel are treated to obtain vanadium and titanium products separately. The method to separate the vanadium, titanium and iron from the vanadium titano-magnetite greatly improves the recovery rate of the vanadium, titanium and iron, and reduces the difficulty of separating the iron and the vanadium titanium in the separation process.

The invention discloses a non-destructive repairing method for heavy metal contaminated soil. The method comprises the steps that to-be-treated soil is broken through a rotary cultivator; then, irrigation is conducted, and part of heavy metal fixed in soil is dissolved out; nanometer particles with Fe3O4 as a core and SiO2 as a shell are added into the soil to serve as adsorbent, and nitrogen containing macro-ring carboxylic acid derivate is modified on the edge of the shell of the particles of a core and shell structure; after adsorption treatment, the adsorbent adsorbing the heavy metal is separated out through an electromagnetic harrow device, a buffer solution and carbon microspheres are added in the separated-out soil, stirring and standing are conducted, and supernate is removed; and then, the soil is washed by purified water several times, and the treated soil is obtained. The soil treated through the method is free of secondary contamination, the heavy metal removing rate is high, efficiency is high, and cost is low.

The invention discloses a preparation method of a traditional Chinese medicine composition for preventing and treating irregular menstruation. The method comprises the following steps: concentrating a certain quantity of raw materials medicine including motherwort, cyperus tuber, sweetgum fruit, hemlock parsley, seed of cowherb and spatholobus stem into water extract diluted extractum by water extraction, or concentrating the raw material medicine into water extraction and alcohol precipitation diluted extractum by water extraction and alcohol precipitation, then putting dextrin, starch or the like used as substrates into a one-step granulating machine, spraying the water extract diluted extractum or the water extraction and alcohol precipitation diluted extractum used as a binding agent into the one-step granulating machine for one-step granulation, finally grinding grains, and adding other auxiliary materials to prepare traditional Chinese medicine preparation for oral administration. The method can significantly reduce the quantity of the auxiliary materials, shorten the processing time and the heating time for condensation and drying, avoid the damage to the effective ingredients of the traditional Chinese medicine composition, simplify the process flow and reduce the energy consumption. The flowability of the prepared granules is high, the disintegration of compressed tablets is fast, the production process is not easily polluted, and the quality of finished products is ensured well.

The invention discloses a process for extracting a valuable metal from coal gangues. The process is characterized by comprising the following steps of: A, coarse crushing and fine grinding: coarsely crushing the coal gangues into particles, and then finely grinding the particles into fine particles of which the particle size is less than 1mm; B, activation: putting the fine particles obtained in the step A into a furnace, and activating for 0.5-1 hour; C, acid fusion: putting the activated fine particles in the step B into a container, adding a sulfuric acid solution, heating to 880-950 DEG C under a stirring condition, and reacting for 0.5-1 hour to obtain a solution and coal gangue acidolysis residues; D, solid-liquid separation: filtering the solution obtained in the step C by adopting filter cakes when the solution is hot; E, extraction: adding the filtrate into an extract, oscillating for 0.3-1 hour, standing for layering, heating lower-layer liquid to 80-120 DEG C, concentrating, cooling and crystallizing the lower layer liquid, and crushing crystals into particles; and F, heating for forming: heating the crystal particles obtained in the step E until the crystal particles become powder, and heating the powder in a tube furnace in an airtight mode to obtain a valuable metal namely solid aluminum oxide.

The invention relates to a method for irregular ceramic tile forming. The method for irregular ceramic tile forming is characterized by comprises the first step of conducting ball milling on the raw material into mud with water content being 33%-40%; the second step of conducting filtering pressing on the mud obtained in the first step through a pressure filter to make the water in a filter cake reach 15%-18%; the third step of extruding the filter cake obtained in the second step through a vacuum extruder into a platelike green body; the fourth step of conducting flower pattern coining and cutting on the platelike green body through a roller cutting mold to obtain an irregular green brick blank; the fifth step of stoving the irregular green brick blank. Compared with the prior art, the method for irregular ceramic tile forming has the advantages of being environmentally friendly, low in cost, and high in production efficiency, and simple in technology aimed at the production of the irregular tile.

The invention belongs to the field of medicinal preparations, and discloses an indissolvable drug oral sustained-release dry emulsion tablet and a preparation method thereof. The preparation method for the oral sustained-release dry emulsion tablet comprises the steps that after an oil phase, a surface active agent and cosurfactant are evenly mixed, an indissolvable drug is added till the drug is dissolved completely, and accordingly a medicine-carried self-emulsifying system is prepared; after the medicine-carried self-emulsifying system and an aqueous solution of a hydrophilic gel framework material are evenly mixed, spray drying is conducted, and sustained-release dry emulsion powder is obtained; after the sustained-release dry emulsion powder and a conventional tablet auxiliary material needed for preparation are mixed, wet granulation is carried out; at last, tabletting is performed. The sustained-release dry emulsion tablet can improve the dissolution and dissolving-out performance of the indissolvable drug, the bioavailability of the indissolvable drug is improved, a stable blood concentration is formed, and the compliance of patients is improved. The sustained-release dry emulsion tablet is not complex in composition of prescription, and the preparation technology is suitable for industrial production.

The invention relates to a graphene surface modification method based on a dry method. The method comprises the following steps: S1, adding graphene oxide into a concentrated nitric acid solution, performing ultrasonic dispersion and filtration, repeatedly washing a filter cake with deionized water to be neutral to obtain the roughened graphene oxide; S2, putting the roughened graphene oxide in the S1 into a ball mill to be ball-milled, and then pouring silver acetate into the ball mill to be mixed with graphene oxide and ball-milling the mixture again to obtain a graphene oxide / silver acetate mixture; S3, putting the graphene oxide / silver acetate mixture into a muffle furnace to be heated and introducing a nitrogen atmosphere to obtain Ag particle-loading graphene oxide; and S4, adding the Ag particle-loading graphene oxide after ultrasonic treatment into hydrazine hydrate to be reduced to prepare Ag particles, the grain sizes of which are 30-100nm, and uniformly dispersing the Ag particles to the surface of graphene. The method provided by the invention is simple to operate, can produce on a large scale, and is free of heavy metal pollution.

The invention discloses a method for processing lead-acid accumulators, comprising the following steps of breaking and separating the lead-acid accumulators, directly smelting separated lead plate grids in a relatively low-temperature smelting furnace to obtain lead liquid or lead alloy liquid; and generating tribasic lead sulfate chemical products by the reaction of lead slime and alkali. The method does not need to carry out the smelting at high temperature, thus the lead steam is reduced, and the technical wasted energy is also reduced; in addition, the invention does not generate secondary pollution, has simple and environment-friendly technique, is easy to operate and saves energy source.

The invention relates to a production method of polyphenylene sulfide and specifically discloses a preparation method of a sodium sulfide reaction precursor in polyphenylene sulfide production. The preparation method comprises the following steps: (A) dissolution, proportionally adding raw materials into a pre-reaction kettle, wherein the raw materials include a sodium sulfide polyhydrate and an entrainer, and the entrainer is an amide compound; adding water into the system to ensure that the molar ratio of Na2S to H2O is 1 to (10 to 20); eliminating oxygen in the pre-reaction kettle; then, heating the mixture to 150-180 DEG C, and maintaining the temperature for at least 30min to obtain an intermediate; (B) dehydration: distilling to remove redundant water in the intermediate to obtain the sodium sulfide reaction precursor. The preparation method disclosed by the invention has the following advantages: 1) the preparation time of the sodium sulfide reaction precursor can be shortened from 4-6h to 2-3h, and the process energy consumption is correspondingly lowered by 50% or more, thereby creating remarkable economic and environmental value; 2) the scheme is easy to implement and promotes industrial popularization.

The present invention discloses a preparation method of traditional Chinese medicine composition for preventing and treating irregular menstruation, wherein the method comprises the following steps of: concentrating a certain amount of crude drugs containing certain ingredients (leonurus, Ligusticum wallichii, semen vaccariae and leatherleaf milletia) into a water extracted dilute extract via water extraction, or alcohol precipitating and concentrating the crude drugs into a water extracted and alcohol precipitated dilute extract via water extraction; then placing dextrin or starch and the like as a substrate into a one-step granulator, spraying the water extracted dilute extract or the water extracted and alcohol precipitated dilute extract acting as an adhesion agent into the one-step granulator for one-step granulation; finally, performing granule shaping, adding other accessories to prepare traditional Chinese medicine oral preparation. The method can reduce accessory amount obviously, shorten processing time and heated time for concentrating and drying, and prevent the effective constituents in the traditional Chinese composition from destroying; the prepared granule has good liquidity; the disintegration of the pressed tablet is faster; the process flow is simplified and energy consumption is reduced; the composition is seldom polluted during the production; the quality of finished product is ensured better.

The invention discloses a method for preparing a Chinese medicinal composition for preventing and treating menoxenia. The method comprises the following steps of: preparing a certain amount of certain raw material medicaments (motherwort, nutgrass galingale rhizome, beautiful sweetgum fruit, Szechuan lovage rhizome and cowherb seed) into water-extracted thin extract by adopting water extraction and concentration or water-extracted alcohol-precipitated thin extract by adopting water extraction and alcohol precipitation; then putting dextrin or starch and the like serving as substrates into a one-step granulator, and spraying the water-extracted thin extract or the water-extracted alcohol-precipitated thin extract serving as adhesive into the one-step granulator to perform one-step granulation; and finally, reshaping the granules, and adding other auxiliary materials to prepare a Chinese medicinal preparation for oral administration. The method can obviously reduce the amount of the auxiliary materials, shorten the processing, concentration, drying and heating time and avoid destroying effective ingredients of the Chinese medicinal composition; the prepared granules have good fluidity, and the pressed tablets are quicker to disintegrate; and the process flow is simplified, the energy consumption is reduced, the production process is not easily polluted, and the quality of the finished product is well guaranteed.

The invention relates to a process of extracting zinc from dedusting ash of a blast furnace, and belongs to the technical field of comprehensive utilization of metallurgic solid wastes. The process comprises the steps of a ball milling process, a magnetic separation process, a flotation process, a filter pressing process, a waste water recovery process, a caustic soda flake leaching process and electrolysis. In the caustic soda flake leaching process, sodium hydroxide is firstly added in tailing slag for filter pressing; then, sodium sulfide is added in filtrate for filter pressing again; and bone glue or potassium alkyl diphenyl ether sulfonate is added in the filtrate for electrolysis. The process can effectively extract zinc elements from the dedusting ash of the blast furnace through the caustic soda flake leaching process; and the whole process is low in energy consumption, environment-friendly and high in recovery rate of zinc.

The invention discloses a method for enhancing the taste of western-style ham slices by synergetic compounding of radio frequency heating treatment and konjac gum. According to the method, the formula of ham slices is adjusted by compounding konjac gum, xanthan gum and carrageenan according to a certain ratio, such that the preservation time of the western-style ham can be improved, and the rotten degree of the ham can be reduced; by adding the epsilon-polylysine to replace the chemical preservative, the good antibacterial effects can be maintained in the 120 DEG C high temperature environment, and the antibacterial effect cannot be affected by the heating treatment process during the ham processing process; by compounding with vitamin C, the synergistic effect can be achieved; and the filled ham is subjected to the radio frequency heating treatment, wherein the long wavelength wave can penetrate through the ham, the heating is rapid, the energy consumption is low, and the processing time is shortened. According to the present invention, the western-style ham slices prepared through the improvement method has characteristics of mellow aroma, tender taste, no chemical protection agent and no harm to human body, and the process has characteristics of low energy consumption and cost saving.

The invention provides a method for separating vanadium, titanium and iron from a vanadium-titanium magnet concentrate. The method comprises the following steps that 1, the vanadium-titanium magnet concentrate, high-volatile coal, a binder, and an aggregating agent are dosed according to the proportion of 100:38-40:1-3:1-2, mixed and pelletized to produce a pellet; 2, the pellet is fed into a rotary hearth furnace for roasting so as to reduce the vanadium-titanium magnet concentrate through the high-volatile coal and generate a reducing material; 3, dry grinding and dry-selection and electricfurnace fusion treatment are performed on the reduced material to obtain semi-steel, vanadium-rich titanium tailings and vanadium-rich titanium slag; and 4, the semi-steel is treated to obtain an ironproduct, and the vanadium-rich titanium tailings and the vanadium-rich titanium slag are treated to obtain vanadium and a titanium product. The method not only greatly improves the recovery rate of separating the vanadium, the titanium and the iron from the vanadium-titanium magnet concentrate, but also reduces the difficulty of separating the iron and the vanadium from the vanadium-titanium magnet concentrate.

The invention discloses a vacuum low-temperature evaporation concentration treatment method for landfill leachate, which is characterized in that: the landfill leachate is separated into steam and concentrated liquid by low-temperature evaporation in a vacuum state through a vacuum evaporator, and the operating pressure of the vacuum evaporator is controlled at 4.5‑7.5kPa, the evaporation temperature is controlled at 30‑40°C. Because the invention adopts low-temperature evaporation, it reduces fouling of the evaporator and facilitates cleaning, prevents ammonia nitrogen from overflowing with steam, improves heat exchange efficiency, reduces heat loss, has low energy consumption, and low leachate treatment cost.

The invention belongs to the technical field of chemical engineering and discloses a new process for preparing sodium thiocyanate. The new process for preparing sodium thiocyanate comprises that coked gas PDS process desulphurized mixed salt is taken as a raw material, firstly sodium thiocyanate inside the raw material is extracted with methyl alcohol, then filter pressing is carried out, so that sodium thiocyanate filtrate is obtained, and finally evaporation concentration, cooling crystallization and centrifugal drying are carried out, so that sodium thiocyanate crystals are obtained. Sodium thiocyanate prepared by adopting the new process disclosed by the invention has high purity and good market prospect, desulphurization waste is effectively utilized, a waste material is changed into things of value, industrial raw material cost is greatly reduced, and occupying area is also reduced to some extent, so that an enterprise can make up the deficits and get surpluses.

The invention discloses a method for preparing sodium thiocyanate by using desulphurization waste liquid of coke oven gas, and belongs to the technical field of utilization of desulphurization waste liquid of the coke oven gas. The method comprises the following steps: using the desulphurization waste liquid of the coke oven gas as a raw material, firstly, filtering the waste liquid in vacuum, using tributyl phosphate to extract thiocyanate radicals in the waste liquid, then using sodium hydroxide solution to back-extract the extract, and finally concentrating and crystallizing the extract, and washing and drying the crystals to obtain sodium thiocyanate crystals. The method uses the desulphurization waste liquid of the coke oven gas to prepare a sodium thiocyanate product with the purityas high as 93 to 95 percent so as to change waste into valuable and makes full use of waste resources; and the method is simple, saves energy, has no three-waste discharge, is favorable for environmental protection, has low production cost and good economic benefit, and develops a new path for the utilization of the desulphurization waste liquid resources of the coke oven gas. The sodium thiocyanate product prepared by the method can be widely applied in the industries of medicaments, textile, printing and dyeing, pesticide, chemistry and the like.

The invention provides a preparation method of an epoxy composite material on the basis of nano silica particles and solves the problems that the operation is complex, the investment is large, the pollution is easy to happen in the conventional preparation method, and mechanical performance of composite materials prepared through the conventional preparation method is undesirable. The preparation method comprises the following steps: the nano silica particles are well dispersed by the ethanol solution of a coupling agent under the combined action of violent stirring and ultrasonic wave; the processed nano silica particles are dried and grinded so as to obtain modified nano silica particles; then the modified nano silica particles are added into preheated epoxy resin; after the modified nano silica particles and the epoxy resin are stirred uniformly and subjected to vacuum defoaming treatment, the mixture is poured into a preheated die; the mixture is heated to be solidified completely under the condition of vacuum pumping, so that the epoxy composite material is obtained. The preparation method provided by the invention has the advantages that the process is convenient, the operation is simple and easy, the raw materials are low in cost and easy to obtain, the production cost is reduced, the dispersibility of nano silica particles is good, the agglomeration phenomenon does not exist, the energy consumption of the technology is low, the pollution does not exist, and the composite materials prepared through the preparation method have higher mechanical performance.

The invention relates to a production method of polyphenylene sulfide and specifically discloses a preparation method of a sodium sulfide reaction precursor in polyphenylene sulfide production. The preparation method comprises the following steps: (A) dissolution, proportionally adding raw materials into a pre-reaction kettle, wherein the raw materials include a sodium sulfide polyhydrate and an entrainer, and the entrainer is an amide compound; adding water into the system to ensure that the molar ratio of Na2S to H2O is 1 to (10 to 20); eliminating oxygen in the pre-reaction kettle; then, heating the mixture to 150-180 DEG C, and maintaining the temperature for at least 30min to obtain an intermediate; (B) dehydration: distilling to remove redundant water in the intermediate to obtain the sodium sulfide reaction precursor. The preparation method disclosed by the invention has the following advantages: 1) the preparation time of the sodium sulfide reaction precursor can be shortened from 4-6h to 2-3h, and the process energy consumption is correspondingly lowered by 50% or more, thereby creating remarkable economic and environmental value; 2) the scheme is easy to implement and promotes industrial popularization.

The invention discloses an efficient method for preparing nitrous oxide. The method comprises the step of reacting by taking NH3, O2 and NO as raw material gas, taking CeO2 or TiO2 as a catalyst carrier and taking palladium, platinum, gold and nickel or several alloy thereof as active components of a catalyst. The catalyst effects of the palladium, the platinum, the gold and the nickel or the alloy thereof and the cocatalysis effect of rare earth oxides CeO2 and TiO2 are fully utilized, and a small amount of NO is added in the raw material gas to remarkably increase the percent conversion of the nitrous oxide. The catalyst is prepared simply and is easy to operate, requirements for equipment are low, energy consumption of a process is low, and the nitrous oxide is easily industrially produced on a large scale. Particularly, when Pt-Ni / TiO2 is selected as a catalyst, the percent conversion can reach up to 88%, and a new thought is provided for synthesis of the nitrous oxide.

The invention discloses a novel energy-saving and environment-friendly phase-change energy storage wall panel and a preparation method thereof. The structure of the wall panel consists of hydrophobic and moisture-proof non-woven fabric, water-blocking adhesive film, and phase-change GMT core from the wall surface to the outside. layer, hot-melt adhesive film, adhesive non-woven fabric, hot-melt adhesive layer and decorative fabric layer, wherein the phase-change GMT core layer contains at least two or more composite phase-change energy storage materials. The invention adjusts the ratio of phase change energy storage materials with different phase transition temperatures according to local conditions, and evenly adds them to the wall panel, so that it can adapt to the climate difference between the north and the south and the temperature difference between winter and summer, and intelligently control the indoor temperature, so as to achieve high efficiency. energy saving and environmental protection functions.