120results about How to "The reaction process is simple" patented technology

Production of Barbary Wolfberry Fruit polysaccharide is carried out by taking Barbary Wolfberry Fruit as raw materials, soaking, crushing, extracting, enzyme hydrolysis reacting, column chromatography acting, depositing by alcohol, dealcoholizing and drying. It's cheap and simple, has short production period and better purity.

The invention discloses a template-free preparation method of hollow micro-spherical polymers with covalent organic frameworks (COFs), belonging to the field of inorganic nonmetal materials. The template-free preparation method comprises the steps of firstly, adding an organic aldehyde ligand and an amine ligand into a solvent, adding a certain quantity of additives after dissolving and dispersing, and controlling the reaction temperature, the concentrations of the ligands and the reaction time to obtain a solid sediment; and filtering, washing and drying to obtain hollow microspheres with the COFs. The structural characteristics of the hollow microspheres with the COFs are simultaneously determined by the kinds of the ligands, the reaction time, the reaction temperature and the solvent in the reaction system. The template-free preparation method has the advantages that the application range of a direct synthesis method to COFs synthesis is widened, and the hollow appearances of the polymers are obtained; the prepared hollow microspheres have high porosity which can be up to 85%, and the thickness and surface polarity of a spherical shell can be controlled through regulating reaction conditions in the system; and the method disclosed by the invention is simple in reaction process, high in yield, mild in condition, short in process and suitable for industrial production.

The invention discloses a three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material as well as a preparation method and an application thereof. The three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material is formed by uniformly loading carbon-coated tin nanometer particles on a three-dimensional graphene network. The preparation method comprises the following preparation processes: fully dissolving and mixing NaCl serving as a dispersing agent and a template with a metallic tin source and a carbon source, carrying out freeze drying, and porphyrizing, thus obtaining a mixture; putting the mixture in a tubular furnace, and calcining under the effect of hydrogen catalysis, thus obtaining a calcined product; and washing the calcined product, thus obtaining the three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material. The preparation method has the advantages that the preparation process is safe and harmless, the operation is simple, the yield is high, and when being used as an anode material for a lithium ion battery, the prepared three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material has relatively high reversible capacity and cyclic stability.

The disclosed preparation method for chitose/chitosan oligosaccharide with low molecular weight as 0.18-15mega and well water-solubility comprises: preparing water-soluble chitosan by acetylization; degrading the product with non-specific hydrolase while controlling the enzyme dosage and reaction time; adjusting the degraded product pH value to 8-9 with KOH or NaOH solution; depositing with ethanol, cleaning, and vacuum drying the final product with free amidogen that can promote wound healing, restrains tumor cell growth and improves human immunity. Compared with prior art, this invention is convenient to control for wide application.

The invention provides a method for preparing compound powder of alumina and chrome oxide from chromium-containing aluminum sludge. The method comprises that contents of Al, Cr, and Fe in the chromium-containing aluminum sludge are weighed, an inorganic acid solution is added according to the contents, and the mixture is heated and stirred until the mixture is completely dissolved; or that the chromium-containing aluminum sludge is heated, the inorganic acid solution is added, and the mixture is stirred while maintaining the temperature till the mixture is completely dissolved; that a required reducing agent is calculated and then added for reaction, after which the solution is kept stand and cooled; that the pH value of the solution is adjusted to 2.5-3.5, the solution is filtered to remove impurities, a liquid dispersant is added to mix the solution evenly, the PH value of the solution is then adjusted to 5.0-7.8 to generate a mixed deposition, the solution is filtered after full settlement to obtain a filtrate and a filter cake, the filter cake is washed till a washing solution contains no Cr(VI), and the washing solution is added into the filtrate; that the washed filter cake is dried; and that the object product is obtained by crushing, grinding and calcining. The method fundamentally solves environmental pollution of the chromium-containing aluminum sludge, and comprehensively utilizes the chromium-containing aluminum sludge. The method is simple in reaction processes and has no by-products, and products of the method are easy to control and reach nano-level granularity. Thus, the method can be used for producing grinding materials, cutting tools and refractory materials.

A process for preparing acetonyloxime or butanonyloxime by oxidizing acetone or butanone includes dissolving acetone or butanone is isopropanol or tert-butanol, adding catalyst TS-1 and ammonia, and slowly dripping hydrogen peroxide while reaction for 0.25-12 hr. Its advantages are high conversion rate and high selectivity.

The present invention discloses a method of extracting vitamin E from plant oil deodorized and distilled substance of plant oil. The present invention has a following technical proposal: through crystallization of previously separated crude sterol and molecular distillation of sterol ester, two types of lipase are orderly used respectively to realize the methyl esterification of free fatty and the esterification of triglyceride in deodorized and distilled substance. Then the molecular distillation technology is used to realize the separation of methyl ester and vitamin E in the fatty acid so as to prepare the concentrated vitamin E product. The present invention uses lipase to replace the conventional strong acid and alkali. Two types of lipase are used to replace the methyl esterification of free fatty and the esterification of triglyceride in deodorized and distilled substance. Compared with the prior art, the reaction of the present invention occur in a mild circumstance; the reaction process is easy to be controlled, and conducive to the recycling and use of vitamin E. Besides, the operation is relatively simple and has no problems of environmental pollution. The purity of concentrated vitamin E can reach above 30 percent.

The invention relates to a product prepared through a chemical reaction between graphene oxide and polyethyleneimine (PEI) polymer and to a preparation method. The obtained product is graphene oxide-polyethyleneimine composite; experiment raw materials are graphene oxide and PEI, wherein graphene oxide is a product prepared through chemical oxidation and can be oxidized graphene or carboxylated graphene, and the graphene oxide contains active groups like hydroxyl groups, carboxyl groups and oxygen-containing functional groups, which is beneficial for formation of the composite product. The invention also provides a preparation method for a graphene oxide-polyethyleneimine composite. The composite prepared in experiments has an obvious fold structure; thus, it is proved that the composite product has a specific surface area greater than the specific surface area of graphene and has more adsorption sites, so the composite product can be used for absorbing gas like CO2 and NH3 in flue gas.

The invention relates to the technical field of microbial genetic engineering, in particular to a recombinant cell and application thereof to catalytic synthesis of D-pantolactone. The recombinant cell conducts induction to generate L-pantolactone dehydrogenase, D-ketopantolactone reductase and glucose dehydrogenase, and DL-pantolactone or L-pantolactone can be directly synthesized into the D-pantolactone. The invention further provides a method for synthesizing the D-pantolactone through multienzyme cascade direct catalysis. Compared with an enzymatic resolution technology applied to the industry, the reaction process is simplified, and the reaction efficiency is improved.

The invention relates to a Ziegler-Natta polyethylene catalyst used for vinyl polymerization, a preparation method and an application thereof. The main catalyst component of vinyl polymerization catalyst is prepared by the reaction with the following method: using magnesium powder as raw material for reaction to generate new ecological halide; leading the new ecological halide to have complexation reaction with titanium compound and treated silicon dioxide under the condition that electron donor exists; leading complexation product to have contact reaction with alkyl aluminium compound in alkane solvent system; and after heating and drying, having complexation reaction on the product of the contact reaction and polymer containing polar functional group in the alkane solvent system. The polyethylene catalyst is formed by the main catalyst component and cocatalyst metal organic compound, is higher in polymerization activity, and has the advantage that the produced polymer has wider molecular weight distribution.

The invention relates to a molybdenum disulfide nano-sheet preparation method based on a sodium chloride template. The method comprises the following steps: one or a mixture of two selected from ammonium molybdate and sodium molybdate is adopted as a molybdenum source; thiourea is adopted as a sulfur source; the molybdenum source, the sulfur source and NaCl are dissolved in deionized water according to a molar ratio that molybdenum in the molybdenum source to sulfur in the sulfur source is 1:(1.8-2.5) and according to that the molar ratio of molybdenum in the molybdenum source to NaCl is 1:(150-600); freezing and vacuum drying are carried out, such that a mixture is obtained; the prepared mixture is ground into powder; the powder is sieved and is laid in a square boat; the powder is placed in a tubular furnace thermostatic zone, and is subjected to calcining and chemical vapor deposition, such that a product A is obtained; the product A is washed and vacuum-dried, such that the molybdenum disulfide nano-sheets are obtained. with the method provided by the invention, molybdenum disulfide nano-sheets with characteristics of high quality, uniform dimension, relatively controllable layer number, relatively high yield and relatively low preparation cost can be obtained.

The invention discloses a method for preparing 2, 5-furandicarboxylic acid (FDCA) by using sodium hypochlorite to perform electro-catalysis on 5-hydroxymethylfurfural (5-HMF). The method is characterized by comprising the following steps: evenly mixing the 5-HMF, the sodium hypochlorite and an alkaline solution at the room temperature to obtain a mixed solution, and mixing the mixed solution intoan anode electrolytic cell; adding an alkaline solution into a cathode electrolytic cell, wherein the volume of the added alkaline solution is equal to that of the mixed solution, and the molar concentration of the added alkaline solution is equal to that of solute of the alkaline solution in the mixed solution; taking an anode material as an anode electrode, and carrying out a reaction for 1-12hunder the condition that the potential is 1.0-2.0V so as to obtain the FDCA. The method first uses the sodium hypochlorite and electrolyzed effective chlorine component thereof as an oxidizing agent,takes cheap metals and metal compounds as the anode electrode, replaces the traditional precious metal-based electrode material catalyst with an oxidation reaction catalyst, and replaces the traditional high temperature and high pressure thermal catalytic reaction with a mild electrooxidation reaction at room temperature and atmospheric pressure, so that the cost is greatly lowered, the reaction process is simplified, the energy is saved, the conversion rate of the 5-HMF is further increased, the yield and selectivity of the FDCA are approached, and the industrial production of the FDCA is promoted.

The invention discloses tri-functionality urethane acrylate. A preparation method of tri-functionality urethane acrylate comprises the following steps of firstly, making trimethylolethane or the trimethylolpropane react with ethylene oxide or epoxypropane under the action of a catalyst, so that polyether triols is obtained; then making polyether triols react with 2-isocyanatoethyl acrylate, so that tri-functionality urethane acrylate is obtained. According to tri-functionality urethane acrylate, urethane acrylate is prepared from 2-isocyanatoethyl acrylate, reaction steps are reduced, the reaction process is simple and easy to control, gel is not generated easily due to side reactions, a urethane acrylate product is low in viscosity and can be constructed and applied as a UV formula product more easily, no or little solvent is added when tri-functionality urethane acrylate is used for UV coating, and the requirement of applying tri-functionality urethane acrylate to a low-viscosity coating is met; after low-viscosity tetra-functionality urethane acrylate UV photocuring urethane acrylate is cured, the excellent performance such as high hardness, abrasion resistance, scratch resistance, heat resistance and weather resistance is achieved, and tri-functionality urethane acrylate can be applied as a raw material of the UV coating, printing ink and adhesive.

The invention belongs to the technical field of a preparation method of a polysiloxane-polyphenylether segmented copolymer. The preparation method is characterized by comprising the following steps of: throwing polysiloxane and polyphenylether which have reactive end groups in the molar ratio of 5-1:1, as well as an acid catalyst accounting for 0.1-5 percent of the gross mass of reactants into a reactor, and reacting for 8-24 hours at the temperature of 80-120 DEG C, wherein the reactants are respectively dissolved in a certain solvent, and a polyphenylether solution is added in batches; filtering mixture obtained after reaction, precipitating with a precipitator, suction filtrating, washing with water and removing the solvent, the catalyst and the precipitator through reduced pressure distillation to obtain the polysiloxane-polyphenylether segmented copolymer in a predicted structure. The invention provides a method which has no strict requirements on the polymerization degree size of the reactants and mild reaction conditions and can synthesize the polysiloxane-polyphenylether segmented copolymer in one step, well solving the problems of severe synthetic conditions and multiple and multifarious reaction steps.

The invention provides a catalyst for coproduction of mixed alcohols and alpha-olefin through a synthesis gas one-step method and a preparing method and application thereof. The catalyst is prepared from Co3O4, stable oxide of M1 and stable oxide of M2, wherein Co, M1 and M2 account for 10-60%, 0-5% and 10-60% of the total mass of the catalyst, M1 is selected from one or more of Li, Na, K, Rb and Cs, and M2 is selected from one or more of Mg, Ca, Zn, Al, Zr, Mn, La and Ce. The active component of the catalyst for coproduction of mixed alcohols and alpha-olefin through the synthesis gas one-step method is obtained for reduction activation and carbonization, and the active component is Co2C nano particles. The preparing method is simple, the obtained catalyst is high in stability, the carbon number selectivity of mixed alcohols and alpha-olefin in the synthesis gas one-step method for coproduction of mixed alcohols and alpha-olefin is high, and the methane selectivity is low.

The invention discloses a transesterification preparation method for 1,3-dioleic acid-2-triglyceride palmitate, and belongs to the technical field of oil processing. The transesterification preparation method is as follows: separating and extracting to obtain palmitic acid and oleic acid by taking lard oil as a material; synthesizing triglyceride palmitate by utilizing candida rugosa lipase to catalyze palmitic acid and glycerol; and synthesizing 1,3-dioleic acid-2-triglyceride palmitate by utilizing immobilized rhizopus oryzae sn-1,3 specific lipase to catalyze triglyceride palmitate and oleic acid. According to the method provided by the invention, used materials are wide in source and low in price, a reaction process is simple, and product content is higher, and purity can reach 76.19%, and therefore, the transesterification preparation method is suitable for industrial popularization and application.

The invention discloses low-viscosity 2-functionality-degree makrolon urethane acrylate and a preparation method and application thereof. The preparation method of low-viscosity 2-functionality-degree makrolonurethane acrylate comprises the following step that polycarbonate diol and isocyanatoethyl prop-2-enoate react to obtain 2-functionality-degree makrolon urethane acrylate. The invention further discloses application of 2-functionality-degree makrolon urethane acrylate to preparation of a UV coating or ink or an adhesive. Makrolon urethane acrylate is prepared from isocyanatoethyl prop-2-enoate, the reaction process is simple and easy to control, gel is not prone to be generated through side reactions, the product viscosity is low, construction and application of UV formula products are benefited, and when 2-functionality-degree makrolon urethane acrylate is used for UV spraying, no solvent or few solvent is added, and the requirement for 2-functionality-degree makrolon urethane acrylate used for the low-viscosity coating is met. After 2-functionality-degree UV photocuring makrolon urethane acrylate is cured, excellent mechanical performance, hydrolysis resistance, thermal stability, weather fastness, durability, drug resistance and solvent resistance are achieved, and 2-functionality-degree makrolon urethane can be used as a raw material of the UV coating, the ink and the adhesive.

The invention relates to a preparation method of polybenzoxazole, which comprises the steps: 4, 6-Diaminoresorcinol/terephthalic acid composite salt is added into a polyphosphoric acid solution containing a certain amount of phosphoric anhydride and fully blended and dissolved directly at a temperature of 30 DEG C to 80 DEG C under the protection of inert gases, thereby preparing the polyphosphoric acid solution of 4, 6-Diaminoresorcinol/terephthalic acid composite salt which carries out a reactive extrusion polymerization to obtain the polybenzoxazole with twin screws. The invention directly mixes the 4, 6-Diaminoresorcinol/terephthalic acid, phosphoric anhydride and polyphosphoric acid to prepare into solution which carries out twin-screw polymerization without needing to carry out pre-polymerization, thus greatly shortening the polymerization time, saving time and increasing the production efficiency.

The invention discloses a preparation method of nanopore SiO2 doped foaming cement and belongs to the technical field of thermal insulation materials for construction. The foaming cement is doped with the nanopore SiO2 which has excellent properties such as ultra-low heat conductivity coefficient and density, ultra-large porosity, non-inflammability and hydrophobicity, and therefore, the nanopore SiO2 doped foaming cement is obtained; the comprehensive properties, for example, thermal insulation property, flame resistance and moisture resistance, of the nanopore SiO2 doped foaming cement are improved without affecting the practical properties thereof, such as fitting with a wall. The preparation method of the nanopore SiO2 doped foaming cement is simple in reaction process, mild in conditions, short in flow and suitable for industrial production.

The invention relates to a method for selective preparation of p-xylene from 4-methyl-3-cyclohexene-1-carbaldehyde. Specifically speaking, the method comprises the following steps: dehydrogenation and aromatization as well as in-situ hydrogenation and deoxidation reactions of 4-methyl-3-cyclohexene-1-carbaldehyde are carried out in the effects of a tungsten-based catalyst at 250-450 DEG C, and p-xylene is prepared. The method can be carried out in a fixed bed reactor, a fluidized bed reactor or a moving-bed reactor separately, and reaction raw materials are directly injected into a reactor by an injection pump, or the reaction raw materials pass a catalyst bed layer with purging of carrier gas in order to obtain p-xylene. The process has the advantages of simple reaction process, and high selectivity of target product; the substrates can be obtained by Diels-Alder reaction from isoprene and acrolein which are derived from biomass resources and are used as raw materials, and mole yield of p-xylene reaches 90%. Compared with the prior art, the method has the advantages of cheap raw materials and wide sources, economy of reaction carbon atoms, and the like; the tungsten-based catalyst is cheap, and a new route for preparing p-xylene from biomass is provided.

The invention relates to hyperbranched polymer modified graphene oxide in water phase and a method for preparing the hyperbranched polymer modified graphene oxide, and belongs to the technical field of modification of graphene materials. The method includes ultrasonically dispersing graphene oxide, then adding diamine monomers into the dispersed graphene oxide, and stirring the diamine monomers and the graphene oxide at the constant temperatures to carry out sufficient reaction on the diamine monomers and the graphene oxide; adding diene monomers into reaction systems, and continuing to stir the diene monomers and the reaction systems to polymerize the diene monomers and the diamine monomers; removing hyperbranched polymers by means of dialysis to obtain the modified graphene oxide. Partsof the monomers can be polymerized on graphene oxide lamellas in an in-situ manner when the diene monomers and the diamine monomers are polymerized, so that the graphene oxide can be modified. The hyperbranched polymer modified graphene oxide and the method have the advantages that the technological method is simple and is easy to control, operation conditions for the method are mild, and other added components or multi-step reaction can be omitted; the hyperbranched polymer modified graphene oxide prepared by the aid of the method and composite materials with the hyperbranched polymer modified graphene oxide can be applied to the fields such as preparation of novel separation membranes, novel medicine loading materials and novel adsorption materials.

The invention relates to a recovering method for valuable metal in a waste nickel-cobalt-manganese-lithium ion battery. The recovering method comprises the steps that (1) the pretreatment procedure isconducted, specifically, the waste nickel-cobalt-manganese-lithium ion battery is disassembled, discharged and broken, and a cathode material and an anode material are roughly selected from the wastenickel-cobalt-manganese-lithium ion battery and broken; sieving is conducted, and powder particles are obtained; and in order to remove water-soluble alkali metal salt such as potassium and sodium which are soluble in water in the powder particles, the powder particles are added with the water and stirred into cleaning liquid slurry, the cleaning liquid slurry is subjected to solid-liquid separation, and then, the obtained powder particles are solid valuable metal recovering raw materials.

The invention discloses tetra-functionality urethane acrylate based on pentaerythritol and a preparation method and application of tetra-functionality urethane acrylate. The preparation method of low-viscosity tetra-functionality urethane acrylate comprises the steps of firstly, making pentaerythritol react with ethylene oxide or epoxypropane under the action of a catalyst, so that tetra-hydroxy polyether is obtained; then making tetra-hydroxy polyether react with 2-isocyanatoethyl acrylate, so that tetra-functionality urethane acrylate is obtained. The invention further discloses application of low-viscosity tetra-functionality urethane acrylate to preparation of UV coating or printing ink or adhesive. According to tetra-functionality urethane acrylate and the preparation method and application thereof, in the process that urethane acrylate is prepared from 2-isocyanatoethyl acrylate, the reaction process is simple and easy to control, gel is not generated easily due to side reactions, a urethane acrylate product is low in viscosity, the requirement of applying tetra-functionality urethane acrylate to low-viscosity coating is met, and no or little solvent is added when tetra-functionality urethane acrylate is used for UV spray-coating; after low-viscosity tetra-functionality urethane acrylate UV photocuring urethane acrylate is cured, the excellent performance such as high hardness, abrasion resistance, scratch resistance, heat resistance and weather resistance is achieved, and tetra-functionality urethane acrylate can be applied as a raw material of the UV coating, printing ink and adhesive.

The invention aims at solving the difficult problem of high-concentration organic arsenic wastewater treatment and provides an organic arsenic wastewater treatment and arsenic recycling method based on 'conversion of organic arsenic into inorganic arsenic-adsorption of inorganic arsenic-separation and recycling of inorganic arsenic'. Specifically, the method comprises the following steps: converting the organic arsenic into the inorganic arsenic by utilizing a two-stage catalytic chemical oxidation method, then completing the adsorption of the inorganic arsenic in a complete mixing flow reactor by utilizing nano-hydroxy ferric hydroxide, and finally realizing arsenic recycling by utilizing acid dissolution and ion exchange methods. The invention also provides an integrated reactor for realizing the process. The method provided by the invention can be used for treatment and recycling of livestock and poultry breeding wastewater, industrial wastewater and industrial waste liquid which contain high-concentration organic arsenic.

The invention relates to the technical field of high-entropy ceramic materials, in particular to layered high-entropy double-boron carbide ceramic powder and a preparation method thereof. The chemical formula of layered high-entropy double-boron carbide in the layered high-entropy double-boron carbide ceramic powder is REB2C2, wherein RE is at least three different elements selected from Y, Ce, Gd, Dy and Er, and the molar ratio of each of the elements is 1. The preparation method comprises the following steps: ball-milling and mixing at least three metal oxides, a boron source and a carbon source, compacting the uniformly mixed powder to obtain a densified green body, sintering the green body at high temperature to obtain a layered high-entropy double-boron carbide block material, and finally, carrying out crushing and grinding to obtain the layered high-entropy double-boron carbide powder. The single-phase high-entropy double-boron carbide ceramic powder with uniform components can be synthesized by taking the metal oxides as raw materials and adopting a carbon/boron thermal reduction method; and the method is simple in preparation process, easy to control the reaction process, free of impurity introduction, low in product preparation cost and suitable for batch production.

The invention relates to a preparation method of lactic ester. The method includes: mixing a carbohydrate, a transition metal salt, alcohol and water, subjecting the mixed solution to stirring reaction under a temperature of 200-260DEG C and a pressure of 4-15MPa so as to obtain the lactic ester. The transition metal salt is acidic, the alcohol is low carbon alcohol with a carbon atom number of 1-4, and the carbohydrate has a hydrolysis product containing monosaccharide. The preparation method of the lactic ester provided by the invention has the advantages of simple overall reaction process, safety and high efficiency, low cost, low equipment requirement, popularization and application, and significant increase of the product conversion rate.

The invention discloses a method for preparing raspberry ketone in acidic ionic liquid and belongs to the field of organic chemical synthesis. The raspberry ketone is synthesized by performing a selective addition reaction on phenol and butanone which serve as initial raw materials and the acidic ionic liquid, which is high in thermal stability and difficult to volatilize, can be recycled and serves as a catalyst and a reaction solvent. According to the method, any organic solvent which is easy to volatilize and an additionally added catalyst are not used, the reaction condition is mild, and the post treatment is simple and convenient, so the method is a green and environment-friendly new method for synthesizing the raspberry ketone. The problems that the catalyst is toxic and harmful and cannot be recycled, a volatile organic solvent is used, and a large number of industrial three wastes are produced in the prior art are solved.

The present invention discloses process of synthesizing sesamol as natural structure antioxidant with pepper amine as precursor. The present invention adopts water insoluble organic solvent, especially benzene, as the hydrolysis product extracting agent, has greatly reduced product colorizing, high yield and simplified operation, and may be used in industrial production.

Photochemical catalysis activity attributes method of the photochemical catalysis material, as the following steps: puts the photochemical catalysis material in the glass gas reactor and make it tight, using the clean air to wash the reactor system; sets the light source, makes its light go through the light-directing window and shine in the photochemical catalysis material; injects the organic liquid or liquor in the reactor system, uses isopropyl alcohol photochemical catalysis firstly to produce acetone and carbon dioxide attributes system; uses new photochemical catalysis activity test instrumentation to test the content of the isopropyl alcohol, acetone and carbon dioxide in the mixture gas; the photochemical catalysis activity of the material is character by the quantity of the acetone and carbon dioxide, it is the reaction speed; the photochemical catalysis reactor produce is test in real time by the test instrumentation.

The invention provides a compounding method of an important midbody (E)-3-(2-(7-Cl-2- quinolyl)) vinyl-benzoate required in compounding of montelukast sodium. Raw materials of the method are simple to obtain, and the method is suitable for large scale production. A product is the important midbody in compounding of the montelukast sodium which is an anti-asthmatic agent.