443 results about "Isopropanolol" patented technology

The invention relates to a high-stability bronze powder pigment and a preparation method and application thereof.The preparation method comprises the following steps that copper-zinc alloy coarse powder, stearic acid and a dissolved compound passivator are taken and subjected to ball milling in the nitrogen atmosphere, and a ball milling product is screened, washed and subjected to suction filtration to obtain an amino-functionalized passivated base material; the preparation method comprises the following steps: dispersing SiO2 in anhydrous isopropanol to obtain a reaction system, adding deionized water and a catalyst, dissolving tetraethoxysilane and phenyltriethoxysilane in anhydrous isopropanol, slowly dropwise adding, carrying out a heat preservation reaction, and carrying out suction filtration and washing to obtain a phenyl modified SiO2 coated intermediate; the preparation method comprises the following steps: dispersing a compound stabilizer in anhydrous isopropanol to obtain a mixed system, heating and stirring, dissolving the compound stabilizer in anhydrous isopropanol, dropwise adding into the mixed system, reacting, centrifuging, washing, and drying in vacuum to obtain the bronze powder pigment. The bronze powder pigment disclosed by the invention has excellent oxidation resistance, chemical corrosion resistance and long-term storage stability, and can keep the natural color gloss of metal to the greatest extent.

The invention relates to a dispersing agent for garnet type solid electrolyte and a preparation method thereof, a special powder dispersing agent for dispersing garnet type solid electrolyte (LLZO, Li7La3Zr2O12) in an ethanol or isopropanol system is a polycarboxylic acid-polyether colorless transparent viscous liquid copolymer, and the copolymer is anchored on the surface of powder particles through the strong adsorption effect of carboxyl, so that the dispersing agent can be used for dispersing the garnet type solid electrolyte (LLZO, Li7La3Zr2O12) in an ethanol or isopropanol system. Meanwhile, the polyether chain segment realizes solvent compatibility and steric hindrance effect, the preparation method for the dispersing agent is a controllable free radical polymerization method and specifically comprises dozens of specific steps and conditions, and the dispersing agent has the advantages that the grinding particle size of the garnet type solid electrolyte can be effectively reduced, stable dispersion of powder in slurry is realized, and the dispersing effect is good. Powder agglomeration is inhibited, and the grinding efficiency is improved, so that the mass production requirement of the high-safety solid-state lithium ion battery is met.

The invention discloses an anti-yellowing PVB (Polyvinyl Butyral) adhesive for laminated glass and a preparation method thereof, and relates to the technical field of adhesives. The yellowing-resistant PVB glue for the laminated glass has the advantages that the yellowing resistance is high; the modified PVB / nano silicon dioxide composite material is prepared from the following raw materials in parts by weight: 55 to 65 parts of modified PVB resin, 4 to 6 parts of modified nano silicon dioxide, 15 to 20 parts of dioctyl adipate, 0.5 to 1 part of a compound antioxidant, 0.3 to 0.8 part of an ultraviolet absorbent UV-327, 0.2 to 0.5 part of a silane coupling agent KH-560, 0.3 to 0.6 part of ethylene bis stearamide, 0.1 to 0.3 part of 2-benzimidazole methyl carbamate, 3 to 5 parts of tris (1-chloro-2-propyl) phosphate and 0.1 to 0.3 part of nano titanium dioxide. 5 to 8 parts of isopropanol; 0.8 to 1.2 parts of polycarbodiimide. The special modified PVB resin and the nano silicon dioxide are matched with the auxiliary agents such as the compound antioxidant, the anti-yellowing performance of the PVB glue for the laminated glass is remarkably improved through precise process preparation, the components have a synergistic effect, the process is controllable, the product performance is stable, and the cohesiveness is good.

The invention relates to a process for extracting alcohols from an initial mixture (1) comprising alcohols in aqueous phase, with:a distillative separation by an isopropanol-butanol distillation column (III) equipped at the top with a condenser (c3), intended for separating said mixture into a water-isopropanol azeotrope stream (6) at the top and into a water-butanol azeotrope stream (7) at the bottom,a distillative separation intended for separating the water-butanol azeotrope stream into water and butanol, by a hetero-azeotropic distillation system comprising at least one water-recovering water column (IV) and at least one butanol (9)-recovering butanol column (V) equipped with a reboiler (r5),such that a heat transfer is performed from the top water-isopropanol azeotrope stream (6) entering the condenser of the isopropanol-butanol distillation column (III), to the stream entering the reboiler of the butanol column (V).

The invention relates to the technical field of petrochemical engineering, in particular to a continuous production method of high-stability N-methyldiisopropanolamine. The method comprises the following steps: heating and reacting methylisopropanolamine and propylene oxide under the action of a specific catalyst to generate an N-methyldiisopropanolamine crude product; then adding the crude product into a rectifying tower, and extracting a high-purity N-methyldiisopropanolamine product from a side line at the middle upper part; the used catalyst is citric acid modified zeolite loaded copper-chromium bimetal. According to the production method disclosed by the invention, by optimizing an active site structure and a rectification separation path of the catalyst, efficient and stable operation of a reaction process is realized, and the thermal stability of a final product is remarkably improved.

The invention belongs to the field of cellulose ether. The embodiment of the invention provides sodium carboxymethyl cellulose, a preparation method thereof and a dust suppressant. The method comprises the following steps: mixing cellulose, solid alkali and a solid etherifying agent to obtain a first mixture; adjusting the humidity of the first mixture by using a humidity adjusting medium to obtain flowable wet powder; mechanically activating the wet powder to obtain a second mixture; carrying out heating treatment on the second mixture, so that the second mixture is subjected to an alkalization reaction and an etherification reaction; carrying out neutralization treatment on the substance obtained by the heating treatment to obtain a neutral mixture; and sequentially carrying out dissolution treatment and purification treatment on the neutral mixture to obtain the sodium carboxymethyl cellulose. According to the method disclosed by the embodiment of the invention, a large amount of organic solvents such as isopropanol are not needed, so that the generation of waste liquid is reduced, and the environment-friendly treatment cost and the production safety risk are remarkably reduced.

The invention discloses an AgBr-loaded ZnO material, a preparation method of the AgBr-loaded ZnO material and an isopropanol sensor. The method comprises the following steps: firstly, dissolving glucose and urea in deionized water, uniformly stirring, and then adding a zinc source; carrying out hydrothermal reaction on the obtained solution, and firing a product to obtain a ZnO material; and dispersing a proper amount of ZnO powder into deionized water, sequentially adding a bromine source solution and a silver source solution, stirring, collecting a product, washing, and drying to obtain the AgBr-loaded ZnO material. According to the method, the concentration of oxygen adsorbed on the surface of ZnO is remarkably improved by utilizing the overflow effect of noble metal Ag and photoelectron transfer between AgBr and ZnO, so that the chemical reaction between the oxygen and isopropanol is promoted. The prepared AgBr-loaded ZnO material has the characteristics of high sensitivity, rapid response, low detection lower limit, good selectivity and the like for isopropanol gas at a relatively low working temperature.

The invention provides a method for preparing (R)-4-chloro-3-hydroxybutyric acid ethyl ester ((R)-CHBE) through enzyme catalysis, which comprises the following steps: isopropanol is used as a hydrogen donor, a ketoreductase mutant is used for carrying out catalytic reduction reaction of COBE to prepare (R)-CHBE, and the ketoreductase mutant has amino acid mutation at the 83rd site on the basis of an amino acid sequence shown as SEQ ID NO.1. The invention also provides a preparation method of (R)-4-chloro-3-hydroxybutyric acid ethyl ester ((R)-CHBE). The thermal stability, namely heat resistance, of the ketoreductase mutant is improved, and by combining with the use of a rectifying tower, the method disclosed by the invention improves the utilization rate of isopropanol and can discharge a byproduct acetone in time, so that the substrate conversion rate and the product concentration are improved. The invention also provides an enzyme catalysis device used in the method.

The invention provides a lysis binding solution, an extraction kit and a detection method for extracting residual DNA of host cells, the lysis binding solution comprises guanidine hydrochloride, PEG6000, tRNA, glycogen and isopropanol, the concentration of guanidine hydrochloride is 2.0-2.5 M, the concentration of PEG6000 is 1%-10% (m / v), and the concentration of isopropanol is 50-60%. According to the present invention, the host cell residual DNA extraction is performed by using the lysis binding liquid, such that the compatibility between the reagent and different sample types can be significantly enhanced, the sample pre-dilution is reduced, and the matrix interference is reduced so as to improve the extraction efficiency and the extraction accuracy of the residual DNA, and effectively overcome the limitation of the commercial kit.

A method for preparing methyl silicone resin for high-temperature mica boards includes: (1) Solution A is a mixture of methyltrimethoxysilane, dimethyldimethoxysilane, and epoxysilane coupling agent, which account for 87%-95%, 3%-7%, and 2%-6% of the total amount of A, respectively; (2) Adding 0.5-1.0 times the amount of benzene solvent, 0.2-0.3 times the amount of isopropanol, and adding 0.5%-1% of the total amount of A acidic catalyst to obtain solution B; (3) Heating B to 70℃-80℃, and uniformly adding deionized water, and adding... The time is controlled at 2-3 hours. After the addition is completed, continue stirring for half an hour to obtain solution C. The amount of deionized water is 40%-50% of the total amount of A. (4) Transfer C to a separatory funnel and let it stand to separate into layers. The lower layer of methanol solution is purified by distillation, and the upper layer of silanol solution is washed with water until neutral to obtain solution D. (5) Heat D and reflux for condensation reaction. Maintain the temperature at 130℃-140℃ for half an hour, then cool to room temperature and add benzene solvent to form a 50%-60% concentration of methyl silicone resin for high-temperature mica boards. The benzene solvent content is 40%-50%. It is environmentally friendly, has a simple process, excellent bending resistance, and good moisture resistance.

This invention relates to the field of plant component extraction technology, specifically to a method for efficiently extracting and purifying berberine. The method includes: (1) selecting dried stems of *Radermachera sinensis*, crushing and sieving them to obtain *Radermachera sinensis* powder; (2) weighing the *Radermachera sinensis* powder and mixing it with a 20-30% (w / w) ammonium sulfate solution, then adding a compound enzyme preparation for enzymatic hydrolysis, adding isopropanol to obtain a mixture, extracting the mixture using an ultrasonic-microwave synergistic extraction method, centrifuging the extracted mixture for 10-13 min at 3500-4000 rpm, removing the isopropanol layer by distillation to obtain a crude extract; (3) dissolving the crude extract in water and loading it onto a polar macroporous resin for multiple elutions to obtain berberine. Compared with the prior art, this invention uses an enzyme preparation followed by an aqueous two-phase solvent combined with ultrasonic-microwave extraction technology to promote the maximum release of berberine from *Radermachera sinensis* powder, thereby increasing the yield. Finally, a gradient elution with macroporous resin is used to achieve efficient extraction and purification of berberine.

This invention discloses a method for preparing and analyzing trans-4-aminocyclohexylacetic acid. The preparation method is as follows: 4-nitrophenylacetic acid undergoes catalytic hydrogenation in a solvent, followed by filtration. The filtrate is then treated with acid to obtain a 4-aminophenylacetic acid salt solution. The collected catalyst is activated. The 4-aminophenylacetic acid salt solution is mixed with isopropanol, barium hydroxide, tetrabutylammonium bromide, 18-crown ether-6, and dibutyl phthalate. The activated catalyst is then added to initiate a catalytic hydrogenation reaction. After the reaction, the reaction solution is cooled and filtered. The resulting solid is mixed with a preheated dilute sulfuric acid solution and stirred to form a slurry. The mixture is then filtered, and the filtrate is neutralized and filtered again. The collected filtrate is concentrated and crystallized. The crystallized precipitate is washed and dried to obtain trans-4-aminocyclohexylacetic acid. The method provided by this invention has high reaction efficiency, mild conditions, and is suitable for industrial production. It yields high product purity and reliability. Furthermore, the analytical method provided by this invention is accurate and reliable.

The invention relates to the technical field of genetic engineering, in particular to a recombinant microorganism and application thereof in preparation of glycine. The application comprises the following steps: producing glycine by adopting the recombinant microorganism; the recombinant microorganism comprises an enzyme combination and / or a nucleic acid molecule combination. The enzyme combination comprises threonine aldolase, ethanol dehydrogenase and isopropanol dehydrogenase; the threonine aldolase comprises an amino acid sequence as shown in SEQ ID NO. 1. The nucleic acid molecule combination is used for encoding the enzyme combination. According to the invention, threonine aldolase, ethanol dehydrogenase and isopropanol dehydrogenase are converted into microorganisms, and the constructed recombinant microorganisms can be used for decomposing threonine to produce glycine; and a specific system formed by specific isopropanol dehydrogenase, ethanol dehydrogenase and isopropanol dehydrogenase can also have a relatively high conversion rate under the condition of no addition of pyridoxal phosphate (PLP), and has important significance and economic value.

This invention belongs to the field of concentration detection technology and discloses a novel method and application for measuring isopropanol concentration based on tilt angle. The method includes: sampling and pretreatment of the mixed solution; tilt angle detection and specific gravity calculation; data fitting and concentration correlation; data transmission and cloud platform uploading; and real-time display and closed-loop monitoring. This invention is specifically adapted to the mixed solution system of dampening solution, isopropanol, and water in the water tank of offset printing presses. It is unaffected by small amounts of impurities in the solution, and the equipment is waterproof and dustproof, adapting to the industrial environment of printing workshops. Compared with traditional manual sampling or dedicated concentration meter measurement methods, this invention is simple to operate, responds quickly, has low detection costs, and can provide real-time concentration data feedback. It is suitable for online monitoring of isopropanol concentration in industrial production scenarios such as offset printing, and has strong practicality and promotional value.

The invention relates to the technical field of fine chemical engineering, and discloses electronic-grade solid naphthyl epoxy resin as well as a preparation method and application thereof.The preparation method specifically comprises the following steps: (1) firstly, adding epoxy chloropropane and isopropanol into dihydroxy dinaphthyl methane of two isomers, and stirring and dissolving to obtain a mixture A; (2) dropwise adding alkali liquor into the mixture A, and carrying out etherification reaction to obtain a mixture B; (3) dropwise adding alkali liquor into the mixture B, carrying out ring-closure reaction, separating liquid and removing salt to obtain an organic phase layer solution C; (4) washing the organic phase layer solution C with water, and performing reduced pressure distillation to obtain an epoxy resin crude product; (5) adding a solvent into the epoxy resin crude product, heating and dissolving, dropwise adding alkali liquor, carrying out refining reaction, separating liquid and removing salt to obtain an organic phase layer solution D; and (6) washing the organic phase layer solution D with water, and carrying out reduced pressure distillation to obtain the alpha-naphthol bifunctional solid epoxy resin. The product disclosed by the invention is low in total chlorine content, high in purity, relatively high in yield and excellent in heat resistance, and can be applied to the fields of epoxy resin molding compounds, semiconductor chip packaging and the like.

The invention relates to the technical field of prime coat copper foils, in particular to a prime coat copper foil preparation method for improving the cycle performance of a silica material, which comprises the following steps: step 1, mixing pure water and polyacrylic acid, sequentially adding acetylene black, isopropanol, LLZO and LiNO3, and uniformly stirring to obtain prime coat slurry; step 2, coating a copper foil with the prime coat slurry, and drying to obtain a prime coat copper foil; lLZO and LiNO3 are introduced into the bottom coating, so that the volume deformation of the silica material can be effectively relieved, the puncture of lithium dendrites is inhibited, and the cycle performance and safety of the battery are improved.

This invention relates to the field of separation and purification technology, and discloses a method and system for preparing ultra-clean, high-purity isopropanol. The method includes: isopropanol feedstock undergoing a first distillation and a first adsorption process; the first distillation removes light organic components and water, and the first adsorption removes organic impurities including water, alcohols, ethers, and ketones; the first adsorption is performed before or after the first distillation; followed by a second distillation and a second adsorption process; the second distillation removes heavy organic components and most of the metal cations and anions, and the second adsorption further removes metal cations and anions; the second adsorption is performed before or after the second distillation; followed by a third distillation to further remove water, alcohols, ethers, ketones, organic impurities, metal cations, and anions; and finally, filtration to obtain ultra-clean, high-purity isopropanol. This method can obtain ultra-clean, high-purity isopropanol products with low water content and low levels of alcohol, ketone, and ether impurities.

The invention relates to a coating film cleaning agent, cleaning equipment and a cleaning process, and relates to the technical field of glass coating film cleaning. The coating cleaning agent comprises triton and isopropanol, and the proportion of the triton is smaller than or equal to 2%. The method has the effect of reducing the probability of chemical reaction during cleaning of the FCD100 material glass.

The present application provides a forsythoside crystal form, which is a forsythoside hydrate crystal form, a forsythoside anhydrate crystal form, a forsythoside isopropanol compound crystal form, a forsythoside 1,4-dioxane compound crystal form, a forsythoside tetrahydrofuran compound crystal form or a forsythoside dimethyl sulfoxide compound crystal form. The present application also provides a preparation method of the forsythoside crystal form. The preparation method of the present application is safe and simple, and the prepared forsythoside crystal form has good stability.

The invention relates to a method for synthesizing a water-based paint cleaning solvent, which comprises the following steps: S1, isopropanolamine and ethylene glycol butyl ether are put into a dispersion stirrer according to a part ratio of 1: 9 for mixing to obtain a water-based cleaning solvent stock solution, and the stirring time of the dispersion stirrer is 30-60 minutes; s2, the aqueous cleaning solvent stock solution is put into a liquid storage tank of a cleaning system for automobile coating; s3, deionized water is put into a liquid storage tank of the cleaning system for automobile coating, the deionized water and the aqueous cleaning solvent stock solution are mixed and dispersed for 30-60 minutes in the liquid storage tank, and an aqueous cleaning solvent is obtained; the method has the advantages that the raw material input proportion can be adjusted according to requirements, and the system cleaning effect is improved; and the purchase amount of the cleaning solvent stock solution is saved.

The invention relates to the technical field of solid electrolyte material preparation, and discloses a method for preparing doped oxide-based solid electrolyte powder, and the method comprises the following steps: dissolving a titanium source substance, an aluminum source substance, a lithium source substance and a dopant source substance in one or a mixed solvent of two of ethanol, propanol and isopropanol to form a solution A; dissolving a phosphorus source substance, a lithium source substance and a dopant source substance in one or a mixed solvent of two of purified water and ethanol to form a solution B; under the stirring condition in a reaction kettle, dropwise adding the solution A into the solution B, and continuously stirring after dropwise adding to obtain a liquid precursor. Atom-level and molecular-level mixing dispersion of the oxide-based solid electrolyte raw materials in a liquid phase is realized, and compared with the characteristic that only macromixing can be realized in a ball milling method, the preparation method has the advantages that the preparation process is simple, and the cost is low. The uniformity of each component in the material can be obviously improved, so that the performance of the final material is improved.

The invention belongs to the technical field of organic synthesis, and particularly relates to a 3-fluoroisoquinoline-4-alcohol compound and a preparation method and application thereof.The preparation method comprises the steps that substituted 2-azido-2-fluoro-2, 3-dihydro-1H-indene-1-ketone reacts with a solvent; adding an extracting agent for extraction, taking an organic phase, drying, filtering and concentrating to obtain a crude product; and purifying to obtain the 3-fluoroisoquinoline-4-alcohol compound. The solvent is prepared from dimethyl sulfoxide, N, N-dimethyl formamide, acetonitrile, isopropanol, tetrahydrofuran, 1, 4-dioxane, dichloromethane and chloroform. Compared with the prior art, the invention solves the problems that the synthesis of isoquinoline compounds in the prior art needs multi-step reaction, the reaction conditions are harsh, and the tolerance of functional groups is poor. According to the scheme, the 3-fluoroisoquinoline-4-alcohol compound is obtained through one-step chemical reaction, and the method has the advantages that raw materials are simple and easy to obtain, the substrate range is wide, the reaction is mild, the yield is high and the like.

The invention relates to the technical field of building material test and analysis, and discloses a cement concrete back scattering electron image analysis sample preparation method, which comprises: S1, crushing cement into a sample; s2, stopping hydration and drying at low temperature: soaking the sample in absolute ethyl alcohol or isopropanol, and drying at low temperature; s3, pre-polishing: pre-polishing the sample by using raw abrasive paper; s4, inlaying: inlaying the sample with low-viscosity epoxy resin in vacuum cold inlaying equipment; s5, rough grinding is conducted, specifically, the sample is ground through 800 #-2000 # abrasive paper; s6, secondary low-temperature drying: wiping the surface of the sample with absolute ethyl alcohol, and then performing low-temperature drying; s7, fine grinding: finely grinding the sample by using 2500 #-4000 # abrasive paper in sequence; s8, polishing: polishing the sample by using a 1000 nm polishing solution and a 500 nm polishing solution in sequence; and S9, final cleaning: wiping the surface of the sample with absolute ethyl alcohol to obtain the sample for analyzing the backscattered electron image with a flat and smooth surface. According to the scheme, the cement samples are processed according to the sequence, so that the flat and smooth samples without scratches and cracks can be obtained, and then the high-quality back scattering electron image is obtained.

This invention relates to a reflective film surface coating and an anti-fouling reflective film. The reflective film surface coating comprises carbon nanotubes, silica sol, tetraethyl orthosilicate, fluorosilane, an antistatic agent, isopropanol, ammonia, and water. The reflective film surface coating prepared by this invention has a large contact angle with water droplets, thus exhibiting excellent superhydrophobic properties. Fine water droplets condensed on the reflective film quickly roll off, solving the problem of the influence of fine water droplets on the retroreflective performance of the reflective film. By adding an appropriate amount of antistatic agent to the coating material, combined with the good conductivity of carbon nanotubes, charged particles attached to the reflective film surface can be rapidly discharged, eliminating the electrostatic interaction between charged particles and the reflective film, thereby preventing particulate pollutants such as dust in the air from depositing on its smooth surface.

Provided is a method for producing, using a biomass raw material, an additive for cosmetics having performance equivalent to or superior to that of a conventional, fossil-fuel-derived additive for cosmetics. A method for producing an additive for cosmetics according to the present invention involves producing an additive for cosmetics that contains an acrylic polymer derived from a bio-raw material, said method comprising a step (i) for obtaining acetone from bioethanol, a step (ii) for obtaining isopropanol from the acetone, a step (iii) for obtaining propylene from the isopropanol, a step (iv) for obtaining acrylic acid from the propylene, and a step (v) for polymerizing a monomer containing acrylic acid and / or a salt thereof to obtain an acrylic polymer. The acrylic acid introduced in step (v) contains the acrylic acid obtained in step (iv).

The present invention relates to a method for dehydrating isopropanol to produce propylene, a method for producing propylene from acetone as a raw material including the process, and a related production apparatus. The dehydration method of the present invention includes a step of dehydrating a raw material containing isopropanol in the presence of a dehydration catalyst containing alumina to produce a product containing propylene, wherein the water content of the raw material is 0.1-10.0 wt% (, relative to the total mass of the raw material being 100 wt%), and the content of C3-C4 unsaturated impurities in the product is 30 ppm or less. According to the present invention, the production of undesirable by-products can be significantly suppressed while improving the conversion rate of isopropanol.

The invention discloses the field of wafer wet cleaning, and particularly relates to a Malangei drying method compatible with multi-size wafers, which is applied to a drying machine comprising a lifting mechanism and a controller, and the method is executed by the controller and comprises the following steps of: firstly, receiving a wafer size specification signal, driving the lifting mechanism to adjust a wafer bracket to a corresponding preset process height, and adjusting the wafer bracket to a preset process height; the upper edges of the wafers with different sizes are all located in a preset drying working area at the top of the cavity, then isopropanol steam is guided in in an immersion state to construct a surface tension gradient, finally, a drain valve is controlled to be opened to enable the liquid level to be slowly lowered, and moisture is removed through the Malangori effect. Through physical position compensation of the lifting mechanism, it is ensured that the upper edges of wafers of different diameters can be accurately aligned to the preset drying working area at the top of the drying cavity, compatibility of single equipment to the wafers of different specifications is achieved, uniformity of chemical atmosphere concentration and a temperature field is ensured, and the drying quality and the flexibility of a production line are improved.

The application provides a compound, a preparation method, and application in desulfurization and a desulfurizer, a structural formula of the compound is as follows: the preparation method is as follows: diisopropanolamine, ethylene glycol diglycidyl ether, and a solvent are uniformly mixed and then are added into a high-temperature and high-pressure reaction kettle, reaction is carried out at 80-120 DEG C for 4-8 h, the solution is poured out after cooling, and the solution is distilled under reduced pressure to obtain a solid product steric amine; then the prepared steric amine and N-methyldiethanolamine are uniformly mixed at a mass ratio of 1-2:2-3, and are compounded into a 40-50 wt% aqueous solution, and the desulfurizer is preferably applied to natural gas desulfurization.

The invention relates to the technical field of medicinal high polymer material synthesis, in particular to hydroxypropyl methylcellulose (HPMC) and a preparation method thereof, the method comprises the following steps: (1) pre-swelling treatment: mixing cotton powder with an isopropanol aqueous solution with the mass concentration of 10-20% according to the mass ratio of 1: (4-6), and pre-swelling at 20-25 DEG C for 30-60 minutes to obtain pre-swelled cotton powder; and (2) alkalization. (3) etherification: adding the etherification reagent into a reaction kettle, and enabling the etherification reagent to react with the alkalized refined cotton powder. (4) separating and drying; and (5) crushing: performing multi-stage gradient freeze-dried powder crushing on the dried material. And (6) obtaining a final product: mixing and packaging the crushed product. The HPMC product which is low in bulk density, fine in particle size and extremely small in batch-to-batch difference is prepared through the method, and it is ensured that the HPMC product has excellent and stable slow release performance when serving as a slow release framework material.

The present application relates to a kind of adamantane isopropanol amine structure compound and its preparation method and purposes.The compound has the structure as shown in general formula (I):The present application is based on adamantane compound, isopropanol amine fragment is introduced into this system, synthesizes a series of adamantane isopropanol amine compound, and the compound has good inhibitory effect on plant pathogenic bacteria.