16 results about "Diisopropylamine" patented technology

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 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 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 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 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.

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.

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.