31 results about "Diisopropylamine" patented technology

The invention discloses a photocatalyst as well as preparation and application thereof, and belongs to the field of photocatalytic materials, and a preparation method of a porous photocatalyst based on nitrogen heterocyclic rings comprises the following steps: dispersing a parent unit (nitrogen heterocyclic ring molecules) and 1, 4-diacetylene benzene into N, N-dimethylformamide and diisopropylamine, and then quickly adding the catalyst; reacting at 60 to 180 DEG C for 60 to 180 hours; and after the reaction is finished, carrying out suction filtration, stirring and washing a filter cake with a solvent for 1-4 hours, carrying out suction filtration, repeatedly washing and carrying out suction filtration, and carrying out vacuum drying on the filter cake to obtain the nitrogen heterocyclic ring-based porous photocatalyst. The method provided by the invention has the advantages that the preparation conditions are easy to control, the method is environment-friendly, the process is simple and the operation is convenient, and the obtained material not only has high thermal stability, but also shows excellent photocatalytic performance and can be used for efficiently producing hydrogen peroxide. According to the technology, the production efficiency of hydrogen peroxide is improved, the influence on the environment is reduced, and the requirement for sustainable development of the modern chemical industry is met.

The invention discloses a fesoterodine intermediate preparation method, and belongs to the technical field of chemical medicine raw material medicine synthesis, 6-(hydroxymethyl)-4-phenylchroman-2-ol and diisopropylamine are used as starting materials to prepare a fesoterodine intermediate, an inert conversion reagent is used, and the reaction temperature is controlled to be 30-60 DEG C, so that the fesoterodine intermediate is obtained. On the other hand, the excessive diisopropylamine reacts with an inert conversion reagent, the excessive diisopropylamine is converted into an excessive state which does not react with the product, and the excessive diisopropylamine is prevented from reacting with the product to generate a large amount of various impurities; a reducing agent and an inert conversion reagent are introduced to be combined, so that the problem of impurity generation caused by palladium catalytic hydrogenation reduction is avoided.

The invention provides a preparation method of N, N-diisopropylethylamine based on a liquid-phase compression synthesis process, which comprises the following steps: mixing ethanol with hydrobromic acid with specified concentration, and carrying out reactive distillation treatment in the presence of a phase transfer catalyst to generate bromoethane; p-bromoethane and diisopropylamine are subjected to a liquid phase addition and compression combination reaction, and a reaction mixture is obtained; and sequentially neutralizing, distilling, condensing and filtering the reaction mixture to obtain the N, N-diisopropylethylamine, so as to solve the problems that the existing preparation method of the N, N-diisopropylethylamine is high in energy consumption, high in operation risk, large in pollutant discharge amount, low in by-product resource utilization rate, low in cost and the like. The safety is poor; the energy efficiency is low; and by-products cannot be recycled.

The invention discloses a method for synthesizing a dithio alkyl ketone compound by using diisopropylamine, which is characterized in that diisopropylamine is used as alkali, a cycloalkyl peroxy alcohol compound and a tetrasulfide compound are driven by illumination to generate a free radical coupling reaction, and the dithio alkyl ketone compound is successfully synthesized. The preparation method provided by the invention has the advantages of easily available raw materials and simple operation, has excellent functional group compatibility, can meet the synthesis requirements of target products with different structures, and has significant practical application value.

The presently claimed invention relates to an alkaline composition for cleaning a substrate comprising i) copper or copper alloy and ii) cobalt or cobalt alloy, the composition comprising: a) at least one pH adjustor selected from diglycolamine, 4,4-diethoxy-N,N-dimethyl-1-butanamine, 3-dimethylaminopropan-1-ol, dimethylaminoethoxyethanol, N,N-dimethylisopropanolamine, ethylethanolamine, N-methyldiethanolamine, 2-(2-(methylamino)ethoxy)ethanol, 3-(methylamino)propane-1,2-diol, 2-[2-[2-(2-methoxy- ethoxy)ethoxy]ethoxy]ethylamine, 2-[2-(2-aminoethoxy)-ethoxy]-ethanol, N-butyldiethanolamine, diisopropanolamine, N-methyldiisopropanolamine, monoethanolamine, 3-dimethylamino-1,2-propandiol, 2- amino-1-butanol, 2-(2-(2-(2-aminoethoxy)ethoxy)ethoxy)ethanol, prolinol, 1-methyl-2-pyrrolidinemethanol, 1-methyl-2-pyrrolidinemethanol, 1-methyl-3-pyrrolidinol, 2-amino-2-methyl-1-propanol, N,N-dimethylethanolamine, butylethanolamine, diethylethanolamine, 3-methoxypropylamine, 4-(2-hydroxyethyl)morpholine, 4-(dimethylamino)cyclohexanol, 2-amino-2-methyl-1, 3-propanediol, or diisopropylamine; b) at least one complexing agent selected from C2 to C12 hydrocarbon having at least two sulfonic acid or carboxylic acid groups; c) at least one polymeric dispersing agent having a weight average molecular weight ≥ 1000 g / mol; and d) a solvent comprising water.

The invention belongs to the technical field of pharmacy, and relates to a method for recovering effective components from ampicillin sodium crystallization mother liquor, which comprises the steps of diisopropylamine recovery, ampicillin trihydrate acid recovery and sodium isooctanoate recovery. According to the method, the diisopropylamine, the ampicillin trihydrate and the sodium isooctanoate are effectively recovered from the solvent-method ampicillin sodium crystallization mother liquor, the recovery rates of the diisopropylamine, the ampicillin trihydrate and the sodium isooctanoate recovered by the method are all higher than 80%, and the quality of the recovered product is good. According to the method, various effective components of the ampicillin sodium crystallization mother liquor are effectively recovered, the production cost can be greatly reduced, meanwhile, the discharge amount of sewage is reduced, and the economic benefits and social benefits of enterprises are improved.

The invention relates to a preparation method of diisopropylamine silane, which comprises the following steps: (1) reacting dichlorosilane with diisopropylamine to obtain diisopropylamine chlorosilane; and (2) carrying out a reaction on the diisopropylamine chlorosilane obtained in the step (1) and lithium hydride to obtain the diisopropylamine silane. The preparation method of diisopropylamine silane in the prior art is optimized, a complex catalyst does not need to be prepared in advance, raw materials are simple and easy to obtain, reaction steps are simple, high-temperature and high-pressure reaction conditions are avoided, the reaction conditions are mild, the obtained target product has high yield and purity, and industrial large-scale production is facilitated.

Present invention relates to a method for producing green fluorescent paint for use as a lighting for energy-efficient highway lane and park markings, characterized as comprising following production steps; adding 9,10-dibromoanthracene, CuI, Pd catalyst, diisopropylamine and toluene in a reaction flask under nitrogen atmosphere and stirring them on a magnetic stirrer, adding tetraphenylsilanacetylenyl to the mixture and performing reflux distillation by increasing the reaction temperature, after 24 hours bringing the temperature to room temperature, obtaining pure product from the mixture brought to room temperature using column chromatography, taking 0-1% by mass of the product and mixing it in resin and an aromatic solvent for 6-24 hours.

The application discloses an ionic liquid containing a boron-containing oxygen ring and a benzene ring, a preparation method and application, and the ionic liquid is obtained by the reaction of tris(trimethylsilyl) borate, dichloroethylene, 4-p-chlorophenyl imidazoline and diisopropylamine; the ionic liquid can be used for alcoholysis of PET to obtain DMT, improve the conversion rate of DMT, and has a significant prospect in the application of PET degradation and recycling of DMT.

The invention discloses a membrane permeation-pressurized rectification coupling process of a diisopropylamine-isopropanol ternary water-containing system, which comprises the following steps: primarily separating by an azeotropic rectification tower to obtain a diisopropylamine-isopropanol-water homogeneous ternary mixture at the tower top, and cooling by a cooler to obtain a ternary mixture; conveying to a membrane dehydration assembly to selectively remove moisture; and the dehydrated diisopropylamine-isopropanol mixture enters a pressurized rectifying tower, so that high-purity recovery of diisopropylamine and isopropanol is realized. The process does not need to introduce a third component, equipment is simple, the recovery purity is high, meanwhile, chemical pollution is avoided, and the environmental protection requirement is met.

The invention belongs to the technical field of preparation of artemisinin, and discloses a preparation method of artemisinin, which comprises the following steps: reacting diisopropylamine with n-butyllithium in anhydrous THF (tetrahydrofuran) to generate strong base lithium diisopropylamide and obtain a strong base lithium diisopropylamide solution; step 2, then adding a mixed solution of artemisinin and THF into the strong base lithium diisopropylamide solution; the strong base lithium diisopropylamide is used as a strong base to capture specific acidic hydrogen in artemisinin molecules to form an enol salt intermediate; benzene sulfonyl chloride is added to react with hydroxyl of the enol salt intermediate to generate sulfonate; taking a sulfonate group as a good leaving group, carrying out beta-elimination under an alkaline condition to form a double bond, reacting to obtain an artemisinin solution, and purifying the artemisinin solution to obtain a pure product artemisinin; according to the method, benzenesulfonyl chloride and artemisinin which are low in price and easy to obtain are used as main raw materials, the artemisinin is synthesized through a one-pot method, and the method is simple in process, environmentally friendly, high in yield and suitable for industrial production.

The application discloses SAPO-18-MeR molecular sieve and a preparation method and application thereof. The anhydrous chemical composition of the molecular sieve is mMe*nR(Si x Al y P z )O2; Me is at least one selected from Li + , Na + , K + and NH4 + ; R is at least one selected from N, N-diisopropyl ethylamine, tetraethyl ammonium hydroxide, triethylamine, diisopropylamine, diethylamine and ethylenediamine; m is the mole number of Me, m=0.05-0.2; n is the mole number of R, n=0.05-0.2; x is the mole fraction of Si, x=0.05-0.35; y is the mole fraction of Al, y=0.35-0.55; z is the mole fraction of P, z=0.25-0.45, and x+y+z=1. The molecular sieve has excellent silicon distribution and strong acid property, and has excellent catalytic performance as a denitration catalyst after loading Cu ions.

The invention relates to the technical field of medical intermediates, and provides a synthesis method of 7-bromo-8-fluoro-6-(trifluoromethyl) quinazoline-2, 4 (1H, 3H)-diketone, which comprises the following steps: S1, by taking 2-fluoro-4-trifluoromethyl benzoic acid as a raw material, adding Br2 under the conditions of a lithium reagent and diisopropylamine, and reacting to obtain a compound A; s2, adding tert-butyl alcohol, triethylamine and diphenyl azide phosphate into the compound A, and reacting to obtain a compound B; s3, the compound B and N-iodosuccinimide are subjected to a heating reaction, and a compound C is obtained; s4, adding the compound C into dimethylformamide, adding CuCN, and reacting to obtain a compound D; and S5, reacting the compound D with urea to obtain the product. Through the technical scheme, the problems of long synthetic route and low yield of the 7-bromine-8-fluoro-6-(trifluoromethyl) quinazoline-2, 4 (1H, 3H)-diketone in related technologies are solved.

The application provides a MWW structure molecular sieve and a preparation method and application thereof. The preparation method comprises the following steps: mixing an aluminum source, water, an alkali source, a first template agent, a second template agent, a silicon source and seeds to form a gel, and crystallizing the gel to obtain the MWW structure molecular sieve; wherein the first template agent comprises cyclohexylamine, and the second template agent comprises at least one of diisopropylamine, di-n-butylamine, diisobutylamine, 1,4-diazabicyclo[2.2.2]octane, 1,6-hexanediamine and N,N,N,N-tetramethyl-1,6-hexanediamine. The application further provides the MWW structure molecular sieve prepared by the above preparation method and the application of the MWW structure molecular sieve. According to the application, the MWW structure molecular sieve can be directly synthesized without using hexamethyleneimine, piperidine and homopiperazine by the method of seed and two template agents assisting crystallization.

The invention discloses a preparation method and application of a low-silicon SAPO-34 molecular sieve. Comprising the following steps: mixing an aluminum source, a phosphorus source, a silicon source, a template agent R1, a template agent R2 and water to obtain initial gel, wherein the molar ratio of Al2O3 to P2O5 to SiO2 to R1 to R2 to H2O in the initial gel is 1.0: (0.5-3.0): (0.01-0.3): (0.5-8.0): (0.01-2.0): (20-200); r1 is at least one of diethylamine, triethylamine, di-n-propylamine, diisopropylamine, n-butylamine, morpholine, cyclohexylamine, piperazine and tetraethylammonium hydroxide; r2 is at least one of diethylenetriamine, triethylene tetramine, tetraethylenepentamine, pentaethylenehexamine and polyethylene polyamine; heating and crystallizing the initial gel under a closed condition to obtain a crystallized product; and separating and drying the crystallized product to obtain the molecular sieve. The method is simple in process, good in repeatability and beneficial to large-scale industrial production.

The present application relates to the field of chemical industry, and in particular to a method for photocatalytic synthesis of diisopropylethylamine by using a bimetallic catalyst, and provides a preparation method of the bimetallic catalyst: a Pd precursor and a 3d metal salt are mixed and dissolved in deionized water, then mixed with a carrier, the pH is adjusted to 9-10, then reduced, followed by suction filtration, washing, drying, to obtain a Pd-M / TiO2 bimetallic catalyst. The present application also simultaneously provides a method for photocatalytic synthesis of diisopropylethylamine by using the bimetallic catalyst prepared by the above method: diisopropylamine and ethanol are used as raw materials, the bimetallic catalyst is used, and excitation is carried out under the irradiation of a UV lamp in an inert gas atmosphere, so as to carry out a photocatalytic reaction, and finally obtain N,N-diisopropylethylamine.

The invention discloses a preparation method and application of an MOF-PAF mixed matrix membrane, and belongs to the field of gas separation membranes. Comprising the following steps: adding N, N-dimethylformamide and N-methyldiisopropylamine into an aromatic diamine monomer under the conditions of nitrogen atmosphere and ice-water bath, then adding cyanuric chloride, and continuously stirring to react; adding a prepared MOF precursor solution, and continuously stirring and reacting to obtain a membrane casting solution; spreading the membrane casting solution on a clean glass plate, and performing thermal crosslinking in a drying oven through solvent evaporation to obtain a transparent membrane; the prepared membrane is soaked in an ammonia water / water mixed solution, deprotonation is conducted through an alkaline solution, then washing and drying are conducted, and the MOF-PAF mixed matrix membrane is obtained. The MOF-PAF mixed matrix membrane provided by the invention has the advantages of simple process and easy operation, and has good separation performance and stability for separation of H2 / CH4, H2 / N2, H2 / C3H6 and H2 / C3H8.

The present invention provides carvacrol quaternary ammonium salt derivatives, their synthesis methods, and their use as antibacterial agents, belonging to the field of pharmaceutical chemistry technology. The structure of the carvacrol quaternary ammonium salt derivatives of the present invention is shown in Formula (I), where n is the number of carbon atoms between the oxygen and nitrogen atoms, and is 3, 4, or 5; and R is selected from n-propylamine, n-butylamine, n-pentylamine, n-hexylamine, dipropylamine, dibutylamine, diisopropylamine, diisobutylamine, morpholine, or thiomorpholinyl. This series of carvacrol quaternary ammonium salt derivatives exhibits excellent antibacterial activity and can be used as a potential antibacterial agent. #imgabs0#

To provide technology that suppresses freezing of a composition comprising water.SOLUTION: A freezing inhibitor for water contains diisopropylamine dichloroacetate.SELECTED DRAWING: None

The application discloses a preparation method of a porous organic polymer based on BODIPY and application of the porous organic polymer in sewage treatment, and belongs to the technical fields of porous material preparation and sewage treatment. The polymer is prepared by the following method: (1) after dispersing a mother unit BDPA and a reaction group monomer into N,N-dimethylformamide and diisopropylamine, a catalyst is quickly added, and after catalytic reaction, further reaction is carried out with a modified group monomer; (2) based on a Sonogashira coupling method, coupling reaction is carried out at 60-160 DEG C for 120-180 hours; (3) after reaction, suction filtration is carried out immediately, the filter cake is washed with stirring for 1-4 hours and then suction filtered, and after repeated washing and suction filtering, the filter cake is vacuum dried to obtain the material. The preparation condition of the application is easy to control, the environment is friendly, the process is simple, the operability is good, the obtained material has good hydrophilicity, high thermal stability, can efficiently adsorb and degrade organic pollutants such as rhodamine B (RhB) and methylene blue (MB), and thus sewage purification is realized.

The invention relates to a preparation method of diisopropylamine silane, and belongs to the technical field of synthesis of organosilicon compounds. The method comprises the following steps: under the protection of argon, adding a solvent into a reactor, slowly dropwise adding a lithium diisopropylamide solution, and controlling the dropwise adding speed to control the reaction temperature at-5 to 0 DEG C; under the condition of continuous stirring, slowly dropwise adding iodosilane; after dropwise adding, heating the reaction system, and continuously stirring for reaction; and after the reaction is completed, adding aminocarboxylic acid-MOF composite chelating resin, stirring, filtering to remove insoluble substances, carrying out reduced pressure distillation to remove the solvent, and finally, carrying out rectification purification to obtain high-purity diisopropylamine silane. The amino carboxylic acid-MOF composite chelating resin is prepared from chloromethylated resin, zirconium aminobenzenedicarboxylate (MOF), dichloroethane, disodium iminodiacetate, 2-amino-1, 3, 5-triazine and sodium hydroxide, and the amino carboxylic acid-MOF composite chelating resin is prepared from the chloromethylated resin, zirconium aminobenzenedicarboxylate (MOF), dichloroethane, disodium iminodiacetate, 2-amino-1, 3 The purity of the prepared diisopropylamine silane reaches 99% or above, and the purity grade of metal ions reaches 6N grade.

The invention discloses a synthesis and process of N, N-diisopropylaminoacetonitrile, and belongs to the technical field of organic synthetic chemistry, the N, N-diisopropylaminoacetonitrile comprises the following synthesis raw materials: diisopropylamine, formaldehyde, sodium cyanide, hydrochloric acid and water, the feeding molar ratio of diisopropylamine to formaldehyde to sodium cyanide is 1: 1.1: 1; the method comprises the following steps: S1, preparing equipment required for synthesis: two 50L reaction kettles, one 100L reaction kettle, one 3m < 2 > condenser, one 1L glass water segregator, one cold and hot all-in-one machine, one water circulation vacuum pump and one 5L receiving bottle; s2, equipment inspection: all appliances are used after being washed with 3% sodium hypochlorite; s3, 5 kg of sodium cyanide is put into a 50 L reaction kettle, 30 kg of water is pumped into the reaction kettle in a vacuum mode, stirring and dissolving are conducted, and the sodium cyanide aqueous solution is obtained.According to the method, expensive chloroacetonitrile reaction is avoided, the production cost is greatly reduced, operation is easy and convenient, a complex refining process is not needed, the production and refining difficulty of the product is effectively reduced, and the environment-friendly requirement is met; and the method can be widely applied to production.

A cooling medium inlet is formed in an upper cover, a cooling medium outlet is formed in one side of the lower portion of a tank body, a steam inlet is formed in one side of the upper portion of the tank body, a material outlet is formed in the lower surface of a lower cover, and a plurality of heat exchange plates are arranged in the tank body. Every two adjacent heat exchange plates are connected through a plurality of supporting rods and a connecting pipe, the interiors of the heat exchange plates are each of a hollow structure, every two adjacent heat exchange plates communicate with each other through the connecting pipe, flow channels are formed in the heat exchange plates in the axial direction, and a straight pipe is arranged in the center of the heat exchange plate located at the top end. And the top end of the straight pipe is inserted and welded with the cooling medium inlet, a bent pipe is arranged at the central position of the heat exchange plate positioned at the bottom end, and the outer end of the bent pipe is welded with the cooling medium outlet. Therefore, the heat exchange effect with diisopropylamine steam is greatly improved.

Thermoresponsive, switchable-hydrophilicity amine solvents such as diisopropylamine (DIPA), N,N-dimethylcyclohexylamine (DMCHA), dipropylamine (DPA), N-ethylcyclohexylamine (ECHA), triethylamine (TEA), and tert-octylamine (TOA) are used to extract lithium from hypersaline brines. The solvent is mixed with hypersaline brines containing lithium and other alkali metal cations at an extraction temperature. The result is a multi-phase mixture including a light, organic extract phase above a heavy, aqueous raffinate phase. Water and salt partitions from the aqueous phase into the organic phase, and lithium is preferentially partitioned over other alkali metal cations, enabling ion-specific separation. The extract is separated from the raffinate and warmed to a disengagement temperature. At higher temperatures, phase disengagement occurs as the substantially all previously extracted ions and water demix from the organic phase, yielding an aqueous product water stream containing the extracted cations and enriched with lithium. The regenerated solvent can be recycled for use in treatment of additional feed brine.

The present invention relates to the field of coating technology, and in particular to a method for separating resins from coatings. The present invention selects an organic solvent with a solubility parameter greater than 9.0 as the first solvent, which can fully dissolve resins with a molecular weight of 2000Da to 200,000Da and reactive diluents with a molecular weight of less than 1000Da; and uses triethylamine, diethylamine, tributylamine, ethylenediamine, diisopropylamine, and triethanolamine as the second solvent, which can fully dissolve the reactive diluent. However, the solubility of the resin in the second solvent is less than 0.1g, which can form a sufficient solubility difference so that the resin and the reactive diluent can be completely separated. The separation method is simple and efficient, has no special requirements for the viscosity of the coating, and can cover resins and reactive diluents with a large molecular weight range. It has a wide range of applications, good separation effect, can assist in obtaining more accurate results in resin analysis, and has good application prospects.

The present invention relates to a ready-to-use liquid pest control composition comprising: at least one trisiloxane surfactant of formula (I), at least 40 wt% water, and at least one hydrolysis-preventing compound selected from at least one bulky base with steric hindrance, tocopherol, and combinations thereof, wherein the bulky base with steric hindrance is selected from the group consisting of alkali metal bicarbonates, trialkylamines, trialkanolamines, 2-tert-Butyl-1,1,3,3- tetramethylguanidine, lithium diisopropylamine, alkali metal tert-butoxide, and combinations thereof; wherein the composition has a pH of at least 7, measured at 20°C. Formula (I) wherein: R is –(CH2)3-(OCH2CH2)nR1; R1 is -CH3, -OH, or -O(O)CCH3, and n is 2 to 25. The invention also relates to a method of immobilising and / or killing insects and to a pest control product.

The invention relates to the field of organic chemical synthesis and semiconductor material preparation, and discloses a preparation method of diisopropyl amino silane, which comprises the following steps: dropwise adding diisopropylamine into a mixture of trichlorosilane and an organic solvent at-20 to-10 DEG C, stirring and reacting at room temperature, and filtering to prepare filtrate containing an intermediate HCl2SiN (CH (CH3) 2) 2; and adding a metal hydride into the obtained filtrate, maintaining the reaction temperature at 50-60 DEG C, carrying out stirring reaction for 3-5 hours, cooling, filtering to remove solid residues, concentrating the obtained filtrate to remove the solvent, and carrying out reduced pressure distillation to obtain the diisopropylaminosilane product. The method for preparing diisopropylaminosilane is high in safety, low in preparation cost, simple and convenient to operate and high in yield.

The application relates to the technical field of defoaming agent preparation, in particular to a high-content organic silicon defoaming agent composition for a high-temperature and high-shear system. The high-content organic silicon defoaming agent composition is prepared by the following steps: firstly, octamethylcyclotetrasiloxane, tetramethyltetraphenylcyclotetrasiloxane and hydrogen-containing polymethylsiloxane are copolymerized to construct a methylphenyl polysiloxane skeleton; secondly, acetyl-terminated allyl epoxy oxirane / epoxy propane copolyether and allyl glycidyl ether are introduced step by step; then, the obtained product is sequentially reacted with N,N-diethyl-1,3-propanediamine, phenyl isocyanate, diisopropylamine and maleic anhydride to obtain a urea-based / esterified modified polysiloxane; finally, the urea-based / esterified modified polysiloxane is compounded with methylphenyl silicone oil, dimethyl silicone oil, hydrophobic fumed silica and precipitated silica to obtain the high-content organic silicon defoaming agent composition. The obtained defoaming agent has the advantages of instant defoaming, excellent sustained defoaming, strong shear resistance, storage stability and no floating oil in a high-temperature circulating cleaning liquid system, a high-speed sand mill slurry system and the like.

The invention discloses a low-silicon SAPO-34 molecular sieve as well as a synthesis method and application thereof. The chemical composition of the low-silicon SAPO-34 molecular sieve is mR < 1 >. NR < 2 >. (Si < x > Al < y > P < z >) O < 2 >, wherein R < 1 > and R < 2 > are template agents; m is equal to 0.01 to 0.15, n is equal to 0.0 to 0.10, x is equal to 0.01 to 0.07, y is equal to 0.35 to 0.50, z is equal to 0.35 to 0.50, and x + y + z is equal to 1; r1 is at least one of diethylamine, triethylamine, di-n-propylamine, diisopropylamine, n-butylamine, morpholine, cyclohexylamine, piperazine and tetraethylammonium hydroxide; r2 is at least one of polyamines such as N, N '-dimethylethylenediamine, N, N'-dimethyl-1, 3-propane diamine, N, N '-dimethyl-1, 4-butanediamine, N, N'-dimethyl-cyclohexylamine and the like; the method is simple in process, good in repeatability and suitable for large-scale industrial production.