92results about How to "Promote depolymerization" patented technology

A method of depolymerizing polyethylene terephthalate, and a method of manufacturing a polyester resin. When heating, melting and depolymerizing polyethylene terephthalate to be recycled, the heating, melting and depolymerization reaction of the polyethylene terephthalate to be recycled are carried out all at once using one or a plurality of extruders or using an extruder and a reactor provided at an outlet of the extruder. When manufacturing a polyester resin, the reactants are irradiated with microwaves, thus promoting the heating of the reactants, and promoting the esterification reaction.

The invention discloses a low-temperature selective catalytic reduction denitration catalyst and a preparation method thereof, wherein the catalyst takes an attapulgite as a carrier to load nano-composite materials of manganese oxide nano-particles; the structure thereof is as follows: manganese oxide particles with the particle diameter of less than 20nm are loaded on the rod-shaped crystal surface of the attapulgite with the diameter of 40-50nm; one or more types from iron, copper and nickel are added as an additive; and calculated according to the mass percentage of manganese, the content of the manganese oxide in the catalyst is 0.1-20. The preparation method comprises the steps of: firstly extruding, drying and crushing the attapulgite clay, and then preparing attapulgite clay powderinto suspension liquid; adding acid solution to wash and remove carbonate impurities, adding manganese salt, and then adding alkali solution for stirring so as to lead the manganese ion to be hydrolyzed and precipitated and loaded onto the crystal surface of the attapulgite, and finally obtaining the product after centrifugal washing, dewatering, drying and calcinations. The catalyst takes ammoniaas a reducing agent, and has higher activity of catalyzing NH3 and reducing NO reaction within the scope of 120 DEG C to 350 DEG C.

The disclosure describes methods and inhalers that deagglomerate dry powder using inspiratory effort of a user of an inhaler. Inhaler fin and mesh configurations are described that facilitate deagglomeration. At least in steady state conditions, a dry powder and airflow pattern can be generated having turbulence with flow vortices, some of which may have a vortex having an axis of rotation that extends in an inspiratory flow direction while others may have a vortex that is substantially orthogonal to the inspiratory flow direction in an inspiratory airflow path, as an amount of dry powder travels through the inhaler to thereby deagglomerate the dry powder without trapping undue amounts of the dry powder during inhalation.

An IM-5 molecular sieve synthesis method comprises the following steps: 1, dissolving an inorganic alkali, an aluminum source and a template in deionized water, and uniformly mixing to prepare a mixed solution; 2, adding a solid silica gel to the mixed solution obtained in step 1, adding a template precursor, and uniformly mixing to prepare a colloid or a solid-liquid mixture; and 3, transferring the colloid or solid-liquid mixture obtained in step 2 to a crystallization kettle, carrying out hydrothermal crystallization for 1-10 days, cooling after the crystallization to obtain a mixed liquid, and washing, filtering and drying the mixed liquid to obtain raw IM-5 molecular sieve powder, wherein reactants comprise SiO2, Al2O3, M2O, R, A and H2O, a molar ratio of SiO2:Al2O3:M2O:R:A:H2O is 60:(0.3-6):(6-20):(4-15):(1.2-6):(300-1200), M2O is an alkali metal oxide, R is the template, and A is the template precursor. The IM-5 molecular sieve synthesis method has the advantages of good product repeatability, effective reduction of the water content, increase of the concentration of the template, crystallization time shortening and single kettle yield increase.

The invention relates to a method for assisted synthesis of a molecular sieve by means of ultraviolet radiation, which belongs to the technical field of synthesis of the molecular sieve. The method comprises the steps of measuring a silicon source, an aluminum source and other reactants, transferring the silicon source, the aluminum source and other reactants into a quartz container, carrying out the crystallization reaction at a given reaction temperature by means of ultraviolet radiation (power density of 20 to 80 w / m<2>), washing and drying a crystallization product, and obtaining an A-type, X-type, N-type, Silicalite-1-type, Beta-type, Y-type, ZSM-5-type, MOR-type or SAPO-34-type molecular sieve. By adopting the method, the silicon-aluminum molecular sieve with good crystallization can be rapidly obtained, compared with the traditional method, the alkality and temperature of the reactant can be reduced to a certain extent, and the synthesis process of the molecular sieve can be accelerated. The production cost is greatly reduced, and the industrial application prospect is promising.

The invention relates to a hydrotreatment method of deep vacuum distillation wax oil. The mixture of raw oil and hydrogen passes through two hydrogenation reaction zones in sequence, wherein a hydrogenation protective agent and a hydrogenation demetalization deasphaltenizing agent are filled in the first hydrogenation reaction zone, and a hydrogenation desulfurizing agent and a hydrogenation denitrification desulfurizing agent are filled in the second hydrogenation reaction zone. Reaction products are cooled and separated to obtain refined heavy fraction oil, and the refined heavy fraction oil is a high quality raw material for catalytic cracking. In the invention, the raw oil has strong adaptability and can be used for processing deep vacuum distillation wax oil with high sulphur content, high nitrogen content, high metal and high asphaltene content and mixed oil thereof, and moreover, the device has long running period.

The invention relates to a method for synthesizing a kaolin microsphere in-situ crystallized product containing small crystal grain NaY molecular sieves. Kaolin is used as a raw material. The method comprises the following steps of: adding deionized water and sodium silicate or sodium pyrophosphate into the kaolin, mixing and slurrying, performing spray drying on the mixed slurry to prepare kaolin spray microspheres with particle diameters of 20 to 110 microns, roasting a part of the kaolin spray microspheres for 1 to 3 hours at the temperature of between 920 and 1,000 DEG C to obtain high-temperature roasted microspheres, and roasting the other part of the kaolin spray microspheres for 1 to 3 hours at the temperature of between 700 and 900 DEG C to obtain metakaolin microspheres; mixing the high-temperature roasted microspheres and the metakaolin microspheres in a mass ratio of 9:1-1:9, adding sodium silicate, directing agent, sodium hydroxide solution, deionized water and organic additive into the mixture, and crystallizing for 16 to 36 hours at the temperature of between 90 and 95 DEG C; and filtering, removing mother solution, and drying the filtrate to obtain the kaolin microsphere in-situ crystallized product containing NaY molecular sieve crystal grains of 200 to 400 nanometers.

Dry powder inhalers and methods are provided that facilitate deagglomeration of powdered medicament during inspiration. A dry powder inhaler includes a dry powder medicament container assembly, and an elongated dry powder delivery tube having an inlet at one end that communicates with a dose container, and an outlet or inhalation port that extends from the inhaler housing at an opposite end. The delivery tube includes one or more apertures adjacent the inlet that cause cyclonic or turbulent airflow through the delivery tube. The inner surface of the delivery tube has a polygonal configuration and the cyclonic air stream bounces off the polygonal inner surface numerous times as the air stream flows through the delivery tube. Another dry powder inhaler includes a deagglomeration chamber with a polygonal inner surface. An air stream containing dry powder medicament is directed into the deagglomeration chamber and impacts the polygonal inner surface numerous times.

A preparing method of a titanium-based material surface composite antibacterial coating mainly comprises the steps that the titanium-based material surface pretreatment is carried out, the surface of a titanium-based material is smooth and bright, an oxide surface layer is removed, the electrochemical oxidation is carried out on the titanium-based material surface and soluble fluoride, titania nanotube arrays (TNTs) are formed on the titanium-based material surface, nano-silver is loaded in a titania nanotube array structure through the chemical reduction method, finally, the upper faces of titania nanotubes are loaded with a polylactic acid-poly lactic-co-glycolic acid (PLGA) coating containing biological membrane depolymerization micromolecule substance bi (3-amidogen propyl group) amine, and a TNTs-Ag-PLGA / bi(3- amidogen propyl group) amine three-dimensional composite antibacterial coating is formed. According to the antibacterial coating, the slow release time of nano-silver is obviously prolonged, the effectiveness of nano-silver is improved, and the more efficient and durable antibacterial effect is achieved.

A method of increasing a humic acid extraction ratio from brown coal is provided. The method adopts the brown coal as a raw material and increases the humic acid extraction ratio through an alkaline hydrothermal reaction under certain conditions. Based on common humic acid extraction with an alkali liquid, the method increases the humic acid extraction ratio to be 70% or above through changing the concentration of the alkali liquid, the reaction temperature, and other conditions, while the humic acid extraction ratio of common humic acid solution with the alkali liquid is about 20%. The method includes adding the brown coal the particle size of which is 0.2mm or below into a reactor, adding an alkali metal oxide with an alkali-carbon ratio being 0.3-0.7:1, adding water with a liquid-solid ratio being 20 mL / g, reacting at 160-210 DEG C for 4-8 h, subjecting reaction products to solid liquid separation, removing filter residue, subjecting the filtrate to acid washing until a humic acid precipitate is completely precipitated, filtering and drying to obtain a humic acid product. The method is simple in process. Liquid and solid products are convenient to separate and recover.

The invention discloses a method for preparing inorganic mineral polymers through lead and zinc mine tailings. The method includes the steps that activating treatment is carried out on the lead and zinc mine tailings through the wet-process alkalize calcination, alkali-activator is added for inorganic polymerization reaction after metakaolin and sand are added and stirred, the inorganic mineral polymers of a net structure are formed, and a foaming agent and a foam stabilizer can be added into the obtained inorganic mineral polymers to be further prepared into foamed inorganic mineral polymers. The obtained finished inorganic mineral polymers are good in durability, have good high temperature heat insulating property, will not release poisonous substances even when exposed in flame, and can be used for backfill and sealing after a mine is mined, building materials and other aspects. Not only can the stacking problem of the lead and zinc mine tailings be effectively solved and environmental pollution be reduced, but also a new path is developed for developing and utilizing waste lead and zinc mine tailings in China, a new exploration direction is provided for relevant research on recycling of tailings, and the method has a great significance to energy conservation, emission reduction, environmental protection, waste utilization and creation of the environment-friendly society.

The invention relates to the field of building materials, in particular to a tungsten tailings cementing material and a preparation method thereof. The tungsten tailings cementing material is characterized in that a mass ratio of the cementing material is as follows: 50%-70% of tungsten tailings, 5%-15% of hemihydrate gypsum, 10%-30% of slag, 1%-8% of steel slag, 1%-5% of an activator, and 0.1%-2%of a water reducing agent, wherein a mass ratio of the activator is 40%-80% of Portland cement, and 20%-60% of sulphoaluminate cement. The preparation method of the tungsten tailings cementing material comprises the following steps: (1) performing ball-milling on the tungsten tailings and performing drying to obtain tungsten tailings powder; (2) pouring the tungsten tailings powder, the slag, thesteel slag, the activator, the water reducing agent and water into a ball mill for ball-milling to obtain a mixed material; and (3) performing curing at room temperature. The cementing material usesthe tungsten tailings as the main raw material, the problem of tungsten tailings accumulation is effectively solved, and thereby secondary resource high-value utilization of the tungsten tailings is realized.

An attapulgite clay-Ni / Fe nano composite material, a preparation method and applications thereof are characterized in that the attapulgite clay is taken as the raw material; metallic nickel and / or metallic iron particles with the diameter less than 20nm are loaded on the surface of attapulgite rhabdolith with the diameter between 40 and 50nm; the preparation method is that the attapulgite clay is prepared into suspension liquid, then the suspension liquid is hydrolyzed with iron salt and nickel salt and loaded on the surface of attapulgite crystal in the precipitation form of hydroxide, and finally the composite material is prepared through washing, dehydration, forming, drying and hydrogen reduction and calcination. With a nano structure, the composite material has low activation energy, high catalytic activity and strong resistance to carbon deposit, and can be applied to catalytic pyrolysis and purification of thermal gas and tar of a biomass gasification furnace and the catalytic pyrolysis of other various organisms.

The invention provides low-carbon and carbon-absorbing concrete and a preparation method thereof. The low-carbon and carbon-absorbing concrete comprises a gelation material, an aggregate, an exciting agent, a water reducing agent and water; in each cubic meter of concrete, the addition amount of the gelation material is 290-560kg; the addition amount of the aggregate is 1690-1860kg; the addition amount of the exciting agent is 6-12kg; the addition amount of the water reducing agent is 1.5-6kg; the water-binder ratio is 0.28-0.65; the gelation material comprises the following raw materials: cement, slag powder, high-calcium fly ash or added calcium fly ash; the exciting agent at least comprises one of sodium sulfate, natural gypsum and industrial gypsum and any one or more in instant sodium silicate, sodium carbonate, sodium bicarbonate, sodium hydroxide and sodium fluoride. The low-carbon and carbon-absorbing concrete is low-carbon concrete which is prepared from high-calcium fly ash or added calcium fly ash and has high strength, high stability and high carbon absorption performance under the condition that the cement amount is small.

The invention discloses a method for synthesizing ethylidene norbornene by virtue of a multi-lateral-line pressure-variable tubular reactor. The reaction channel of the tubular reactor is provided with a starting material inlet and at least two lateral-line material inlets and the pressure is reduced gradually. The method comprises the following steps: 1) feeding a cyclopentadiene solution into the reaction channel of the tubular reactor from the starting material inlet and feeding 1,3-butadiene into the reaction channel of the tubular reactor from the starting material inlet and any one or more lateral-line material inlets, enabling the cyclopentadiene solution and 1,3-butadiene to have a Diels-Alder addition reaction in the reaction channel of the tubular reactor to obtain vinyl norbornene; 2) performing isomerization on the obtained vinyl norbornene in the tubular reactor subsequently filled with a super basic catalyst to obtain ethylidene norbornene, wherein the reaction temperature is between -10 DEG C and 50 DEG C and the dwell time is 10-69min.

The present invention discloses a method for producing a foamable phenol formaldehyde resin by using paraformaldehyde. The method comprises the following steps: (1) preparing raw materials, wherein the raw materials comprise, by mass, 100-120 parts of phenol, 49.8-75.7 parts of paraformaldehyde, 0.5-5 parts of an alkali catalyst, 1-5 parts of urea, and 4-10 parts of a diluent; (2) adding the phenol, the paraformaldehyde, the alkali catalyst and the urea to a reaction kettle according to the mass parts, and carrying out a reaction at a temperature of 55-90 DEG C under atmospheric pressure; and (3) adding the diluent to the reaction kettle after the reaction, cooling and terminating the reaction. With the method of the present invention, the problem of heat emission of formaldehyde is sloved, the uniformity of the whole product can be ensured, the foamable phenol formaldehyde resin can be obtained, and the late stage phenol formaldehyde foam production can be prompted, wherein the viscosity of the obtained foamable phenol formaldehyde resin is not more than 15 Pa.s.

The invention relates to a method for producing chloromethyl ethyl ether. The chloromethyl ethyl ether with high yield and high purity is made by adding a by-product chlorine hydride generated by production of methyl isocyanate to a mixture of ethanol and paraformaldehyde while stirring for reaction at the temperature of 0-50 DEG C, wherein, the mass ratio of the paraformaldehyde to the ethanol is 1-2:1. In the process of producing the chloromethyl ethyl ether by the method, as the by-product chlorine hydride generated by production of the methyl isocyanate is used, the waste gas from the methyl isocyanate is utilized, which improves environment and lowers cost; in the method for producing the chloromethyl ethyl ether, a little amount of impurities such as the methyl isocyanate, and the like, contained in the chlorine hydride facilitate the reaction and improve the reaction yield.

The invention discloses a coal ash gangue filling activity-stimulating rubber solid material which comprises the following components in parts by weight: 34-60 parts of base material, 15-45 parts of calcium source compound, 7-21 parts of gypsum, 10-42 parts of slag fine powder and 1.5-10 parts of stimulating material, wherein the base material is cement clinker or cement; the calcium source compound is calcined lime and / or calcium magnesium powder; and the stimulating material is chloride and / or sulfate. As Ca(OH)2 is key material for generating hydrated silicate and hydrated aluminum silicate, the coal ash gangue filling activity-stimulating rubber solid material takes the chloride and / or the sulfate as the stimulating material, so that the dissolution of Ca(OH)2 generated by the base material, the calcined lime or the calcium magnesium powder can be promoted, the alkalinity of solution can be improved, the covalent bond of SiO4<4-> in the coal ash can be opened, so that the depolymerization of silica tetrahedron can be promoted, the activity stimulation of the coal ash and the gangue powder can be accelerated, early solidifying and early strengthening when the coarse coal ash and the gangue powder are filled with each other in a mixing way can be realized, and the later strengthening intensity can be improved.

The invention discloses a high-titanium slag soft soil stabilizer, which consists of the following components in percentage by weight: 40.0-60.0 percent of high-titanium slag, 25.0-40.0 percent of ordinary Portland cement, 10.0-25.0 percent of quicklime and 0-10.0 percent of active component. The soft soil stabilizer is prepared by making full use of industrial waste residues produced during pig iron smelting. When the soft soil stabilizer is used for stabilizing soft soil foundations, relatively high unconfined compressive strength is achieved, waste is turned into valuable, and great economical significance and environmental protection benefit are realized.

The invention provides an ardealite-based cement setting retarder and a preparation method and application thereof. The ardealite-based cement setting retarder is prepared by taking, by mass, 90%-95%of ardealite, 3%-6% of slag powder or fly ash and 2%-4% of calcium quicklime powder or calcium slaked lime powder or carbide slag powder, adding an appropriate amount of an alkali activator, mixing and balling; the dosage of the alkali activator is converted into the mass of Na2O and is 6%-15% of the dosage of the slag powder or the coal ash. According to the invention, soluble phosphorus, fluorine and the like in phosphogypsum can be effectively adsorbed and cured, organic matters are neutralized, accordingly, adverse effects of harmful substances in the ardealite on the cement setting time and the early strength can be greatly reduced, the ardealite-based cement setting retarder is short in aging time, and the production efficiency of the ardealite-based cement setting retarder can be greatly improved.

The invention belongs to the field of traditional Chinese medicines, and discloses a compound traditional Chinese medicine extract with effects of whitening and moisturizing, a preparation method and an application thereof. The compound traditional Chinese medicine extract is prepared from the following traditional Chinese medicine raw materials, by mass: 10-50 parts of common bletilla tuber, 10-50 parts of szechwan lovage rhizome, 10-50 parts of oriental waterplantain tuber, 10-35 parts of heartleaf houttuynia herb, 10-35 parts of glossy privet fruit, and 10-35 parts of nutgrass galingale rhizome. According to the present invention, a supercritical extraction technology and ZLUPD high pressure difference continuous low-temperature efficient extraction are adopted to extract active components of the Chinese herbals, and advantages of high quality controllability, high extraction efficiency, high utilization rate, low running cost, low environmental pollution and the like are provided.

The disclosure describes methods and inhalers that deagglomerate dry powder using inspiratory effort of a user of an inhaler. Inhaler fin and mesh configurations are described that facilitate deagglomeration. At least in steady state conditions, a dry powder and airflow pattern can be generated having turbulence with flow vortices, some of which may have a vortex having an axis of rotation that extends in an inspiratory flow direction while others may have a vortex that is substantially orthogonal to the inspiratory flow direction in an inspiratory airflow path, as an amount of dry powder travels through the inhaler to thereby deagglomerate the dry powder without trapping undue amounts of the dry powder during inhalation.

The invention discloses a chemical-fiber titanium dioxide washing system and a chemical-fiber titanium dioxide washing method, and belongs to the field of titanium dioxide treatment. The washing system is provided with a modification tank and an ammonium salt metering tank. A washing water treatment system is arranged on a water outlet of a frame filter press. An online conductivity meter is arranged between the frame filter press and the washing water treatment system. An electromagnetic valve is arranged on a water inlet of each pipeline in the washing water treatment system. The online conductivity meter and the electromagnetic valves cooperate with each other to control washing water to enter the corresponding pipelines in the washing water treatment system. Ammonium salt is added into treated sizing agent for modification during washing, the grain size of titanium dioxide is increased, washing and backwashing are performed, washing refers to washing by water recycled from backwashing, the backwashing refers to washing by desalted water, and washing and backwashing water flows through the filtering device to achieve sizing agent recycling. By the chemical-fiber titanium dioxide washing system and the chemical-fiber titanium dioxide washing method, titanium dioxide yield is increased, consumption of the desalted water is reduced, and energy conservation and environment protection are achieved.

The invention provides a method for catalytically depolymerizing lignin. The method comprises the following step: catalytically depolymerizing lignin by adopting a catalyst which is a layered solid acid catalyst. Lignin is catalytically depolymerized by the layered solid acid catalyst, the lignin conversion rate is higher, the reaction is complete, and the layered solid acid catalyst used in the reaction can be recycled, and higher yield of liquid fuel components can be obtained with the method. The catalyst is separated from a depolymerized product easily, and the method is environmentally friendly and has great significance for establishing a sustainable energy system and protecting the ecological environment.

The invention provides a suspending agent containing kasugamycin and oxine-copper and a preparation method thereof. The suspending agent containing kasugamycin and oxine-copper comprises the following components in parts by mass: 1-5 parts of kasugamycin; 10-40 parts of oxine-copper; 0.5-3 parts of a pH regulator; 3-8 parts of dispersing agents; 3-6 parts of a wetting agent; 0.5-2 parts of a grinding aid medium; and 30-79 parts of water. The dispersing agents comprise a long-chain dispersing agent and a short-chain dispersing agent. The suspending agent containing kasugamycin and oxine-copper can effectively improve the pesticide effects of kasugamycin and oxine-copper.

The invention discloses a preparation method of a modified activated carbon material for a capacitor. The preparation method comprises the following steps: (1) polishing, drying and crushing a carbonsource; (2) activating the raw materials through a phosphoric acid solution to obtain a primary activated product; (3) mixing the precursor powder with the primary activation product, and activating with potassium hydroxide to obtain a secondary activation product; and (4) adding the secondary activation product into a saturated lead nitrate solution, carrying out ultrasonic dispersion, stirring and performing vacuum filtration to obtain a filter cake, and carrying out heat treatment to obtain the material. The preparation method of the activated carbon is simple; the preparation method is simple in process, wide in raw material source and suitable for large-scale production, a secondary activation process is adopted in the preparation process, precursor powder with high content of heteroatoms such as nitrogen and oxygen is added into the activated carbon, the specific surface area is further increased, micropores are enriched in the surface, the specific capacitance of the material isimproved, and the use performance of the material is enhanced.

The invention provides bisphenol A paraformaldehyde phenolic resin and a preparation method thereof, n-butyl alcohol is used as a solvent, p-toluenesulfonic acid is used as a catalyst, and bisphenol Aand paraformaldehyde are subjected to addition condensation reaction to obtain bisphenol A paraformaldehyde phenolic resin. The bisphenol A paraformaldehyde phenolic resin is produced by utilizing the characteristic that paraformaldehyde does not contain water, taking bisphenol A as a raw material, taking n-butyl alcohol as a solvent and taking p-toluenesulfonic acid as a catalyst and carrying out addition condensation reaction, the operation is simple, the environment is protected, the production cost is low, the synthetic route is easy to produce, the problem of environmental pollution caused by a large amount of industrial wastewater in the production process of phenolic resin is solved, and the synthesized product has high molecular weight.

The invention belongs to the technical field of health products and particularly relates to a total-nutrient fermented health food and a preparation method thereof. The food is prepared from nutrient raw materials and fermented raw materials, wherein the nutrient raw materials include mulberries, sea buckthorn fruits, eleutherococcus senticosus fruits, grape twigs and leaves, Chinese scholar tree twigs and leaves, a dewatered and dried malt material, a dewatered and dried rice sprout material, a dewatered and dried black sesame material, a dewatered and dried sweet potato material, a dewatered and dried loofah leaf material, millet, myotonin, yellow rice, red yeast rice, glutinous rice, pleurotus eryngii, mushrooms, needle mushrooms, poria cocos and dried black fungi. The selected food materials are reasonable in compatibility, and the total-nutrient fermented health food is prepared by using a low-temperature complex micro-flora deep fermentation technology, so that the defects of processing methods of traditional health foods and traditional fermented foods are overcome; nutritional ingredients of the food materials are not destroyed, new nutrients are generated, and meanwhile, harmful substances are eliminated; various nutrients are decomposed and refined to be easily absorbed by a human body; and the total-nutrient fermented health food has extremely high nutrient values and health preservation effects.

The invention discloses a method for extracting protein from low-temperature rice bran meal. The method comprises the following steps: 1) immersing low-temperature rice bran meal in a diluted acid, crushing and sieving through a sieve of 60-100 mesh; 2) performing ultrasonic processing; 3) performing centrifugation separation to respectively obtain a supernatant and a solid meal; 4) precipitating rice bran protein from the supernatant; 5) processing the solid meal with a diluted alkali solution, performing centrifugation separation and protein precipitation; and 6) performing drying processing. According to the method, sulfuric acid is utilized for processing low-temperature rice bran meal through immersing, so that protein in the low-temperature rice bran meal is at a molten globule state, and through ultrasonic processing, depolymerization and dissolving of rice bran protein are promoted, and solubility of rice bran protein under an acid condition and the rice bran protein extraction rate are effectively improved. The method is mild in preparation conditions, high in efficiency and low in cost, and the extracted rice bran protein is good in quality.

The invention provides a nickel iron slag-mineral slag low-hydration-heat cementing material and preparation method thereof, and belongs to the field of building materials. The cementing material comprises the following substances in parts by mass: 46-49 parts of a low-temperature clinker and 0.5-1 part of gypsum, wherein the low-temperature clinker comprises the following substances in parts by mass: 20-40 parts of nickel iron slag, 20-30 parts of mineral slag, 20-35 parts of quick lime, 0.3-0.8 part of gypsum, 0.5-2 parts of a diluent and 8-15 parts of water. The efficient resource utilization of the nickel iron slag is realized, and the usage amount of Portland cement is effectively reduced. The nickel iron slag and the mineral slag are used as raw materials, and the quick-hard and low-hydration-heat cementing material which can partially replace the Portland cement is prepared. Compared with the Portland cement, the cementing material has the characteristics of quick hardening, lowhydration heat and good resistance to sulfate erosion.