226results about How to "The synthesis process is green and environmentally friendly" patented technology

The invention discloses a synthetic method of cyclosulphate. A peroxysulfate solution is pre-synthesized through sulfuric acid and hydrogen peroxide, then under existence of an organic solvent, a metal inorganic compound and a catalyst, the peroxysulfate solution is dropwise added to generate a catalytic oxidation reaction with cyclosulfite, after the reaction is completed, salt residue is filtered out, still standing for layering is conducted, an organic layer is taken to be distilled, concentrated and purified, and a cyclosulphate high-quality product is obtained. According to the syntheticmethod of the cyclosulphate, the cheap sulfuric acid and hydrogen peroxide are used as the raw materials, the peroxysulfate solution is prepared to conduct catalytic oxidation on the cyclosulfite, onthe one hand, the reaction is mild, control is easy, and the reaction conversion rate is high; on the other hand, the evaporation capacity of water is small, energy consumption is low, generated wastewater is less, and a synthetic process is more environmentally friendly; and the prepared cyclosulphate is few in impurity, high in purity and wide in market prospect.

The invention relates to a strong-acid type polystyrene cation exchange resin as well as a preparation method and application thereof. The strong-acid type polystyrene cation exchange resin is characterized in that styrene is used as a monomer, methylene diacrylyl is used as a cross-linking agent, and the mass ratio of the monomer styrene to the cross-linking agent methylene diacrylyl is 1:(0.01-0.5). The preparation method comprises the steps of: performing balling, sizing and ageing on the styrene and the methylene diacrylyl under the action of a porogen and an initiator to obtain microspheres, then ultrasonically washing in an alcohol solvent to remove the porogen, performing sulfonation treatment to obtain a sulfonation product, then, directly pouring the solfonation product into ice water, and washing and filtering to obtain the strong-acid type polystyrene cation exchange resin. The strong-acid type polystyrene cation exchange resin has the advantages of high qualification rate, uniform cross-linking structure, high moisture content, large ion exchange capacity, low raw material cost, simple, convenient and controllable synthesis process, and environment friendliness, is applied to adsorption of rare earth metal ions without pretreatment or addition of other reagents, is pollution-free without generation of any wastes and is good in adsorption effect.

The invention discloses a benzoxadiazole compound and a preparation method and medical use thereof. The benzoxadiazole compound has the general structure shown in formula (I). The compound or pharmaceutically acceptable salts, tautomers, mesomers, racemates, stereoisomers, metabolites, metabolic precursors, prodrugs or solvates of the benzoxadiazole compound have an obvious inhibiting effect on PD-1 / PD-L1 protein-protein interaction, so that the benzoxadiazole compound shown in the description can be applied to the preparation of an inhibitor with a PD-1 / PD-L1 inhibitory activity and the immunotherapy of tumors as an immunocheckpoint inhibitor.

The invention discloses star-shaped hydroxyl polyester adopting polyhydric alcoho as a nucleus and a preparation method and an application of the star-shaped hydroxyl polyester. The preparation method comprises the following steps: enabling 1 to 8 molar caprolactone and 1 to 4 molar anhydride to react for 6 to 10 h at 80 to 140 DEG C by adopting 1 molar small molecular polylasic alcohol as a core molecule to obtain a matrix star-shaped polyester, then reacting with 1 to 4 molar monoglycidyl ether at 90 to 150 DEG C to obtain star-shaped hydroxyl polyester. The prepared star-shaped hydroxyl polyester has the advantages of simple synthesis process, high solid content and low viscosity, a hydroxyl value is 140 to 250 mg KOH / g (80 percent of solid content), the viscosity at 25 DEG C when the solid content is 80 percent is 300 to 3000cp, the star-shaped hydroxyl polyester can be cross-linked with a polyurethane curing agent containing an isocyanate group and can be used for preparing a coating with a high solid content, the VOC content at the construction viscosity is smaller than 380 g / L, and the film performance can satisfy the national standard of the solvent-type dual-component polyurethane wood coatings.

The invention relates to a preparation method and application of alkaline metal vanadate. The alkaline metal vanadate can be used as an anode active material of a sodium ion battery, and is a micrometer flower-like material which is formed by stacking calcium vanadate or strontium vanadate nanometer flakes. A molecular formula of the calcium vanadate is CaV4O9, a molecular formula of the strontium vanadate is SrV4O9, the diameter is 2 to 3mu m, and the thickness of each calcium vanadate or strontium vanadate nanometer flake is 10 to 30nm. The preparation method has the advantages that the calcium vanadate and strontium vanadate electrode active material is prepared by a hydrothermal method and post heat treatment, and is used as a novel anode active material of the sodium ion battery; the electrochemical property is excellent, the specific capacity is higher, the cyclic stability is good, and the rate capability is excellent; the tapping density is large, and the commercial potential is great; the technology is simple, the cost is low, the green and environment-friendly effects are realized in the synthesizing process, and the preparation method is suitable for popularizing in market.

The invention discloses low-viscosity star-shaped hydroxyl polyester as well as a preparation method and application thereof, and belongs to the field of macromolecules of polyester. According to the preparation method, a caprolactone modified AB2 type branched monomer is first prepared, and is prepared by a reaction between 1 mole of dihydroxymethyl alkyl carboxylic acid and 1-4 moles of caprolactone at 80-160 DEG C, afterwards, a polybasic glycidyl ether nucleus, monocarboxylic acid and the caprolactone modified AB2 type branched monomer are mixed and subjected to reaction at 100-160 DEG C, and a ring cleavage reaction between a carboxyl group and an epoxy group is catalyzed by utilizing a quaternary ammonium salt as a catalyst to generate a secondary carbonyl group for preparing the low-viscosity star-shaped hydroxyl polyester. The low-viscosity star-shaped hydroxyl polyester provided by the invention has the advantages that a synthetic process is simple, the adjustable range of the hydroxyl value of a product is large, the viscosity is low, and the like; the low-viscosity star-shaped hydroxyl polyester has the hydroxyl value between 1500mgKOH / g and 350mgKOH / g, has the viscosity as low as 3000-15000cp below 25 DEG C, and can be cross-linked with a polyurethane curing agent containing an isocyanate group; high-solid-content paint can be prepared, and the film coating performance meets a national standard for solvent type bi-component polyurethane paint for woodenware.

The invention provides a preparation method of starch graft copolymer coal-water slurry dispersants. After oxidation modification of starch, in a redox system, sodium p-styrene sulfonate and a large monomer are introduced to a starch chain through free radical polymerization reaction to compound a series of coal-water slurry dispersants with excellent performance and unique characteristics. Chief constituents of the starch graft copolymer coal-water slurry dispersants are as follows, by mass: 8-20% of starch, 2-8% of oxidants, 10-30% of monomers and 2-4% of initiators. The starch graft copolymer coal-water slurry dispersants prepared by the method are brown sticky emulsion, the solid content is 26-38%, the pH value is 7-9, and the viscosity is 40-130mPa.s. The preparation method of the starch graft copolymer coal-water slurry dispersants exploits the advantages of strong dispersity of the sodium p-styrene sulfonate and carboxylate to the full and combines effects of hydrogen bond in water molecules and polyhydroxy on a starch straight chain and the space steric hindrance effect of a long chain of the large monomer to enable coal-water slurry to have good dispersion perfoamance and good storage stability. The dispersants can achieve biodegradation and have low toxicity, and raw materials of the dispersants are easy to obtain and low in cost.

The invention relates to a preparation method of environment-friendly one-component moisture curing polyurethane waterproofing paint. The preparation method is mainly characterized by comprising the following steps: adding RDEA of poly-functionality polyether glycol and polyglycol, dehydrating, adding isocyanate for reaction for 1-4 h at 50-80 DEG C, reducing to room temperature, adding a plasticizer, an antifoaming agent, an antioxidant and an ultraviolet light absorber that are pre-dried, uniformly mixing to obtain the polyurethane waterproofing paint. The environment-friendly one-component moisture curing polyurethane waterproofing paint has the advantages as follows: 1), the raw materials are low in cost and easy to obtain, the synthetic method is simple, convenient, efficient and low in cost, the scale-up of the operation processes and the industrial production are facilitated; 2), water is taken as a curing agent for polyurethane resin, therefore the polyurethane resin after curing in air with certain humidity can form a compact polyurethane elastomer coating which is high in safety; besides, poly-functionality active group is introduced and can form a compact cross-linked network after curing, with an excellent mechanical property (the film tensile strength is greater than 6 MPa, and the breaking elongation is greater than 1000%), the polyurethane waterproofing paint can serve as an excellent waterproofing material and is broad in application prospect.

The invention provides a photocatalyst material for absorbing a full sunlight spectrum and a preparation method thereof and relates to the technical field of composite micro-nano materials. The material uses an upconversion material NaYF4: Yb,Er as a template, and the surface of the template is sequentially modified with TiO2 and Ag nanoparticles. Firstly, the upconversion material is obtained through hydro-thermal synthesis reaction, then is used as the template and is successively modified with the TiO2 and Ag nanoparticles through reduction reaction, and the UC / TiO2 / Ag composite micro-nano photocatalyst material is obtained. The photocatalyst material retains the advantage of efficiently absorbing ultraviolet and visible wavebands of high-energy excitation of a traditional photocatalyst material, meanwhile can also convert long-wave radiation of an infrared waveband in sunlight into visible waveband shortwave radiation which can be directly absorbed by the material, the sunlight utilization rate is further improved, full spectrum utilization of sunlight is achieved, and the photocatalyst material is hopeful to serve as a photocatalyst for sunlight-based efficient catalytic degradation of organic pollutants.

The invention discloses a Pd@PtNi nano-crystal with an octahedral core-shell structure, and a preparation method thereof for the first time. The preparation method of the crystal comprises the following steps: adding an octahedral Pd nanocrystal and hydrazine hydrate to an aqueous solution of PVP and citric acid monohydrate, injecting the obtained solution to a K2PtCl4 and NiCl2.6H2O mixed aqueous solution, heating, and stirring to obtain the Pd@PtNi nano-crystal with an octahedral core-shell structure. The invention also discloses a Pd@PtNi / C metal nano-catalyst, and a preparation method and a use thereof. The preparation method of the Pd@PtNi / C metal nano-catalyst comprises the following steps: injecting carbon black into the Pd@PtNi nanocrystal, carrying out ultrasonic treatment, washing, and drying to obtain the nano-catalyst. The nano-catalyst can be used in the fuel cell cathode oxygen reduction reaction process. The preparation method of the Pd@PtNi nanocrystal has mild and fast reaction, and the obtained Pd@PtNi nanocrystal has the advantages of uniform dimension, good dispersibility, enhancement of the utilization rate of Pt atoms, and enhancement of the catalytic activity on the fuel cell cathode oxygen reduction reaction.

The invention discloses an environment-friendly synthesis method of two-dimensional transition metal carbide or nitride nanosheets. The environment-friendly synthesis method comprises the following steps: mixing a corrosion intercalation agent and a ternary layered ceramic material, performing a corrosion intercalation reaction, and then performing shearing dispersion treatment to obtain the two-dimensional transition metal carbide nanosheets or the two-dimensional transition metal nitride nanosheets. The synthesis method of the two-dimensional transition metal carbide or nitride nanosheets, provided by the invention, is environment-friendly, simple in process, easy to operate, safe and controllable in process and low in time consumption and energy consumption; and by the synthesis method, the synthesizing way of the two-dimensional transition metal carbide or nitride nanosheets is enriched and popularization and application of the two-dimensional transition metal carbide or nitride nanosheets can be effectively promoted.

The invention belongs to technical field of fracturing reformation of an oil-gas well reservoir, and discloses hypersalinity resistant cleaning thickening slick water, a cross-linking agent, a thickening resistance reducing agent and a preparation method. The cross-linking agent comprises the following components in percentage by weight: sodium borate decahydrate, sodium citrate, zirconium oxychloride, glycol, glycerol, sodium chloride and water for the surplus; the thickening slick water comprises the thickening resistance reducing agent and water; the thickening slick water is prepared fromthe thickening cross-linking agent and base fluid; the base fluid comprises the thickening resistance reducing agent and water; the weight ratio of the thickening resistance reducing agent to the water is (0.1-1): (999-999.9); the volume weight ratio of the thickening cross-linking agent to the base fluid is (0.1-0.3mL): (499.7-499.9g); the preparation method of the cross-linking agent comprises the following steps: A, preparing an alcohol-based solution; B, preparing alcohol-based mixed liquor; C, ensuring that the alcohol-based solution is subjected to stirring reaction in a closed condition, and cooling, so as to obtain the cross-linking agent. The viscosity of the base fluid is improved after the base fluid is subjected to crosslinking, the resistance reducing effect is not affected, and fracturing construction can be properly met.

The invention discloses a novel special concrete contraction reducing type compacting agent, which relates to a novel special concrete contraction reducing type compacting agent, and belongs to the technical field of concrete admixture. The preparation method of the product comprises the following steps: preparing stock solution with deionized water, sodium sulfide solution, sulfur powder and a catalyst, wherein the catalyst is mixed solution of methoxypolyethylene glycol, dimethyl-1, 3-propylene glycol and alkylphenol ethoxylate sodium sulfide; and then preparing an inorganic waterproof contraction reducing type compacting agent for inorganic concrete with deionized water, the stock solution, triethanolamine, methoxypolyethylene glycol, dimethyl-1, 3-propylene glycol, alkylphenol ethoxylate sodium sulfide, silicate and a defoamer DF-642. The compacting agent is prepared under the low intermingled quantity, and experimental results show that when the intermingled quantity is 0.1-2 percent, the invention can effectively reduce the early contraction of the concrete, decrease the cracking risks, enhance the concrete compaction, improve the pore structure, and achieve the functions of preventing water and leakage, thereby enhancing the resistance of the concrete against physical and chemical erosion. However, the invention relates to an II type compacting agent, which has a significant effect on the reduction of the concrete contraction and is particularly applicable to the engineering field with strict requirements for concrete contraction and cracking.

The invention discloses a quaternary ammonium class ionic liquid compound containing hydroxy groups, which is used for extracting and rectifying systems, such as normal hexane-benzene, cyclohexane-benzene, ethanol-water and the like. The invention also provides a preparation method of the quaternary ammonium class ionic liquid compound containing the hydroxy groups. The ionic liquid compound disclosed by the invention has the characteristics that ionic liquid is not volatilized and has a liquid state of positive and negative ions and the separation performance of a compound containing hydroxy groups is high. The quaternary ammonium class ionic liquid compound containing the hydroxy groups is also synthesized at one step by adopting a common chemical raw materials, so that the price is low.

The invention provides a method for preparing hydroxylamine hydrochloride, and specifically relates to a method for preparing hydroxylamine hydrochloride from hydrogen peroxide and ammonium chloride. The method comprises the following steps: catalyzing hydrogen peroxide, free ammonia and acetone or butanone to synthesize ketoxime first, and then enabling the ketoxime to react with ammonium chloride under a negative pressure to generate hydroxylamine hydrochloride, free ammonia, acetone or butanone, wherein the acetone or butanone and the free ammonia are recycled for reuse. The invention solves the problems of high raw material cost and more byproducts for preparation of hydroxylamine hydrochloride in the prior art; meanwhile, low-value ammonium chloride is used for preparing hydroxylamine hydrochloride to ensure that the cost is low, and the sustainable development of the soda industry can be promoted.

The invention relates to an intumescent flame retardant, and a synthesis method and an application thereof, and concretely relates to a three-sources-integrated intumescent flame retardant, and a synthesis method and an application thereof. The problems to be solved are low flame retardation efficiency, poor thermal stability and difficulty in processing of existing intumescent flame retardants. The three-sources-integrated intumescent flame retardant is a methylphosphonic acid-piperazine-neopentyl glycol phosphate oligopolymer. The method comprises the following steps: 1, heating piperazine and distilled water, adding saturated methylphosphonic acid, and carrying out heating, reacting, concentrating and drying to obtain a white crystal intermediate di-methylphosphonopiperazine; and 2, adding neopentylene glycol and a solvent, carrying out heating, adding the white crystal intermediate di-methylphosphonopiperazine, heating the obtained solution to reflux the solution, cooing the refluxed solution, carrying out suction filtration and washing, and drying the obtained product to obtain the three-sources-integrated intumescent flame retardant. The flame retardant has the advantages ofgood char forming performance, high thermal stability, and high-efficiency flame retardation to polyethylene resin, and the preparation method has the advantages of mild reaction conditions, simplicity in operation, and safety. The flame retardant is used for realizing the flame retardation of the polyethylene resin.

The invention belongs to the technical field of coatings, and discloses a water-based epoxy curing agent based on castor oil triglycidyl ether and a preparation method of the curing agent. The preparation method comprises the following steps: performing a reaction on bisphenol epoxy resin, polyetherol diglycidyl ether and a polyamine to prepare an epoxy-polyamine addition product with -NH2 groupsat two ends, adding the castor oil triglycidyl ether, performing a branching reaction to obtain a prepolymer with -NH2 groups at three branched chain tail ends, adding a monoepoxy compound to block terminal primary amine hydrogen, and finally adding water for dispersion to obtain the water-based epoxy curing agent. The water-based epoxy curing agent obtained by the method has the advantages of a long pot life, low viscosity and easy construction when used with water-based epoxy resin, and the cured product has a large cross-linking degree, has good flexibility while having good corrosion resistance, and overcomes the defects of low toughness and high brittleness of an ordinary epoxy coating layer.

The invention relates to products which belong to the technical field of concrete admixture. The technology is characterized by the following steps of: preparing stock solution which comprises the following components: deionized water, calcium oxide, sulphur powder and catalyst, wherein the catalyst consists of mixed solution of methoxypolyethylene glycol, dimethyl 1,3-propanediol and alkylphenol polyoxyethylene ether sodium sulfate; and then preparing an inorganic waterproof shrinkage reducing compacting agent for inorganic concrete, wherein the inorganic waterproof shrinkage reducing compacting agent comprises the following components: the deionized water, the stock solution, triethanolamine, the methoxypolyethylene glycol, the dimethyl 1,3-propanediol, the alkylphenol polyoxyethylene ether sodium sulfate, silicate and a defoaming agent DF-642. The novel shrinkage reducing compacting agent special for the concrete can effectively reduce early shrinkage of the concrete, reduce crack risk, improve compactness of the concrete, improve porosity structure, realize waterproof function and seepage-proof function with low intermingled quantity (0.1 to 2 percent), and improve durability of the concrete to physical corrosion and chemical corrosion. The invention relates to an III type compacting agent used for increasing the compactness and improving the strength of the concrete. The novel shrinkage reducing compacting agent special for the concrete is most suitable for the engineering field requiring high concrete strength and high waterproofing quality.

The invention discloses a method for regulating the valence state of metal in a carbonized metal-organic framework material through alkaline N. Firstly, 5wt.%-10wt.% of an alkaline N source are addedto a copper acetate solution, an N group and Cu in the solution are coordinated by use of ultrasonic field radiation at the frequency of 500-1,000 W, a trimesic acid solution is dropwise added to thesolution, the reaction is sustained for 1-3 h, and an N-modified N-MOF precursor material is obtained; the N-MOF precursor material is put in a high-temperature tube furnace, heated to 600-800 DEG C in the N atmosphere and kept for 4-6 h, and a CN-MOF catalyst with Cu / CuOx / C(x<1) is obtained. The alkalinity coefficient (pKb) of the alkaline N source is in the range of 3-9, alkaline N and copper elements are bonded under the high-energy cavitation action produced by ultrasonic, so that the valence state of metal in a metal oxide produced after carbonization is regulated, and finally, the activity of the obtained catalyst is improved and the service life of the catalyst is prolonged.

The invention discloses an amphipathic chitosan quaternary ammonium salt derivative and preparation thereof and application thereof. The structural formula of the amphipathic chitosan quaternary ammonium salt derivative is shown as in the description, wherein R1 is a 2-hydroxypropyl trimethyl ammonium halide group, R2 is alkyl or aromatic alkyl, and all a, b and c are polymerization degrees. The amphipathic chitosan quaternary ammonium salt derivative has excellent water solubility, degradability and biocompatibility, can effectively restrain the growth of gram negative bacteria and gram positive bacteria and can directly serve as antibacterial materials or can be used for preparing antibacterial composites. A preparation method of the amphipathic chitosan quaternary ammonium salt derivative is green, environmentally friendly, mild in reaction condition, low in cost and easy to industrialize.

The invention discloses an Ag-CoSe2 nanoribbon and a preparation method and a purpose thereof. The Ag-CoSe2 nanoribbon is complete in structure and excellent in electric conductivity; when the overpotential is 0.35 V, the current density is increased by 8 times compared with pure CoSe2 nanocatalyst; when the current density is 10 mA / cm2, the overpotential is only 0.32 V, and is reduced by 73 mV compared with the pure CoSe2 nanocatalyst; and in addition, the Ag-CoSe2 nanoribbon can directly serve as a catalyst for the electrolysed water oxygen evolution reaction process, shows excellent catalysis activity in the catalysis reaction process, and achieves more advantages. The preparation method of the Ag-CoSe2 nanoribbon uses a micro ion exchange method; compared with a traditional nanometer crystal synthesis method, the preparation method of the Ag-CoSe2 nanoribbon is simple and fast in reaction, mild in conditions, short in operation time and simple in procedures, largely reduces the synthesis cost, and is more environment-friendly in synthesis process; and the obtained nanoribbon is uniform in size and excellent in dispersibility, so that the catalysis activity of the electrolysed water oxygen evolution reaction is improved, and the application prospect is broad.

The invention discloses preparation of polyacrylamide-coated composite silica gel. According to the preparation, a layered physical coating technique is adopted to introduce polyacrylamide linear hydrophilic molecules on the surface of fully-porous spherical silica gel to prepare the multilayer polyacrylamide-coated composite silica gel. Due to excellent hydrophilicity and polarity, polyacrylamidehas strong separation ability for saccharide mixtures under the condition of mobile phase of acetonitrile and water. The composite silica gel can be used as the chromatographic filler for efficient separation of various monosaccharides, disaccharides and polysaccharides. Experiments show that the composite silica gel can achieve rapid baseline separation of more than 10 kinds of oligosaccharidesat the same time, and the column efficiency can be up to more than 150000 / m, so that the separation effect is excellent. The preparation method of the composite silica gel chromatographic filler doesnot involve chemical reaction and addition of toxic reagents, so that the synthesis process is green and environmentally friendly, the preparation cost is relatively low, and the test cost for analysis and detection of saccharide compounds is significantly reduced.

The invention relates to the preparation techniques of catalysts and is intended to provide a preparation method of a catalyst capable of combusting VOCs ((volatile organic compounds) containing fluorine and chlorine. The method includes: preparing La-CeO2 powder from CeO2 and lanthanum-containing compounds by impregnation, and preparing Co / La-CeO2 powdery catalyst with cobalt-containing compounds by impregnation; mixing and stirring with polyvinyl chloride and colloidal alumina into a slurry, soaking a singular honeycomb ceramic carrier in the slurry, impregnating and drying repeatedly until a target value of total carried weight is reached; calcining to obtain the integrated Co / La-CeO2 catalyst. The catalyst is resistant to high temperature and free of deposition when calcined at about 900 DEG C; a coating layer is firmly adhered with ultrasonic peeling rate of 1.6-2.1%; the catalyst has good antitoxic capacity and high catalytic activity for VOCs containing fluorine and chlorine, the materials are easy to obtain, the process is simple, the cost is low, and the catalyst is easy to produce on industrial scale; the catalyst has stable reuse stability, the synthetic process is environment-friendly with no pollution byproducts produced, and the process is widely applicable.

The invention discloses a method for catalyzing hydrodeoxygenation of guaiacol to prepare cyclohexanol. According to the method, the cyclohexanol is prepared through a one-step hydrogenolysis method,in which decalin liquor of guaiacol is catalyzed through supported catalyst x percent-Ru-y percent-MnO / g-CNTs; the catalyst takes multiwalled carbon nanotube subjected to mixed acid treatment as a carrier, and is formed by loading Ru-MnO on the carrier; in neutral liquid phase, guaiacol is subjected to one-step hydrogenolysis to produce cyclohexanol; the maximum selectivity of principal product cyclohexanol can reach 85.84 percent; the percent conversion reaches 99.38 percent, that is, the yield reaches 85.31 percent. The method has the advantages that the process route is simple, reaction equipment and operation method are simple, the reaction condition is mild, the reaction time is short, the catalyst is simple and available, the cost is low, the stability is good, products are pure, separation and extraction are easy, the expected economic benefit is very noticeable, and the method has great significance when being applied to industrial production.

The invention relates to a urea synthetic method which comprises the following steps: compression of raw material ammonia and carbon dioxide; synthesizing and gas stripping; medium and low pressure decomposition and recovery process; evaporation and pelletizing of urine. The method disclosed by the invention is simple, is low in cost and has a high synthesizing speed; obtained urea particles are uniform, have low impurity content, are moderate to dissolve and can be sufficiently adsorbed by crops more easily; moreover, an adsorption tower is utilized to treat tail gas, so that the synthesizing process is more environmental-friendly.

The invention relates to a sterilization polymer containing a quaternary ammonium salt and halamine or a halamine precursor functional group as well as a preparation method and application of the sterilization polymer. The preparation method comprises the following steps of: generating a high-molecular polymer containing the quaternary ammonium salt and the halamine precursor functional group through the reaction among a halo-methylated high-molecular polymer serving as a carrier, tertiary amine and a halamine precursor; and generating the sterilization high-molecular polymer containing the quaternary ammonium salt and the halamine precursor functional group through halogenating reaction. The sterilization high-molecular polymer has a quick, efficient and broad-spectrum sterilization effect, can be extensively applied to sterilization treatment of various water bodies and air as well as the control of harmful smelly gas. The sterilization high-molecular polymer also can be mixed with other materials to obtain various sanitary and anti-bacterial products such as an anti-bacterial mattress cover, an anti-bacterial blanket, an anti-bacterial diaper.

The invention relates to a fluorescent molecularly imprinted polymer hollow microsphere, a preparation method and application thereof, and belongs to the technical field of molecularly imprinted polymers. The preparation method comprises the following steps: preparing silicon dioxide nano-particles SiO2, preparing a polymer of silicon dioxide surface grafted fluorescein isothiocyanate SiO2@FITC-APTES; and preparing fluorescent molecular imprinting polymer SiO2@FITC-APTES@MIP, and etching the polymer to obtain hollow fluorescent molecular imprinting polymer FITC-APTES@MIP. The invention has theadvantages that the hollow fluorescent molecularly imprinted polymer which can rapidly and specifically detect a target analyte with high efficiency, can be prepared, and the synthesis process is safe and environment-friendly, specifically, the polymer can specifically adsorb the target analyte and generate fluorescence quenching, and has a remarkable quenching effect within 20 minutes, thereby shortening the detection time.

The invention discloses a castor oil-based double-crosslinkable reactive resin monomer and a preparation method thereof. The preparation method comprises the following steps: reacting ricinoleic acidwith epichlorohydrin to obtain castor oil-based epoxy resin, carrying out an epoxy ring-opening reaction on the castor oil-based epoxy resin and unsaturated acid to produce castor oil-based acrylate,and finally reacting the castor oil-based acrylate with unsaturated acid anhydride to obtain the castor oil-based double-crosslinkable reactive resin monomer. The castor oil-based double-crosslinkablereactive resin monomer prepared in the invention is applied to the field of functional resins, and has wide application prospects in the fields of building, mechanical manufacturing, food packaging,medicines and the like.

The invention provides a method for preparing avobenzone. The method comprises the steps that p-tert-butylbenzaldehyde and p-methoxyacetophenone serve as raw materials, a condensation reaction is performed under the alkaline condition, and prepared condensation products are oxidized into the avobenzone under the action of an oxidizing agent. The preparation method is simple, convenient, easy to perform and few in reaction steps, the preparation condition is mild and easy to control, and the prepared avobenzone is light in color, good in quality, pure in smell, high in market competitiveness and capable of easily achieving industrialization popularization.

The invention discloses a biphenyl compound as well as a preparation method and medical application thereof, the structure of the biphenyl compound is shown as a formula (I) or a formula (II), and thebiphenyl compound or pharmaceutically acceptable salt, tautomer, meso-isomer, raceme, stereoisomer, metabolite, metabolite precursor, prodrug or solvate thereof is a PD-L1 inhibitor. The compound hasa remarkable inhibiting effect on the interaction of PD-1 and PD-L1 protein, so that the compound can be applied to the preparation of PD-L1 inhibitors and immunomodulator drugs for preventing or treating tumors, autoimmune diseases, organ transplant rejection, infectious diseases and inflammatory diseases.