759 results about "Hexene" patented technology

The invention belongs to the technical field of ethylene oligomerization catalysis, and discloses a catalytic system for ethylene selective oligomerization and a preparation method and application thereof, and the catalytic system comprises a carbon bridge bidentate phosphine chromium catalyst, an organic boron auxiliary agent and an aluminum-containing activator in a molar ratio of 1: (1-50): (100-1500). The carbon-chromium catalyst is prepared by the following steps: reacting CrCl3 (THF) 3, a ligand and CH2Cl2 under stirring, filtering, and carrying out post-treatment to obtain the catalyst, the catalyst and the aluminum-containing activating agent are uniformly mixed, and then the organic boron auxiliary agent is added and stirred. The catalyst system constructed by the carbon bridge bidentate phosphine chromium catalyst, the organic boron auxiliary agent and the aluminum-containing activating agent realizes ethylene selective oligomerization. The catalytic system can realize high-efficiency and high-selectivity preparation of 1-hexene and 1-octene under the condition that aluminoxane co-catalysts such as MAO and MMAO are not adopted, the catalytic activity is high, the reaction initiation is rapid, the operation is stable, and the repeatability is good.

The invention relates to the technical field of surfactants, and discloses a preparation method of a modified polycarboxylate surfactant and application of the modified polycarboxylate surfactant in pesticide preparations. 3-hexene-1, 6-diamine and epoxy chloropropane are used as raw materials, 1, 6-tetraglycidylamine-3-hexene is obtained through ring-opening and ring-closing reactions, 1, 6-tetraglycidylamine-3-hexene is utilized twice, and the yield of the 1, 6-tetraglycidylamine-3-hexene is increased. The preparation method comprises the following steps: sequentially reacting 2, 3, 4, 6-tetraglycidylamine-3-hexene with sodium hydrogen sulfite and phosphoric acid to obtain tetrasulfonate hexene and tetraphosphate hexene, and copolymerizing the tetrasulfonate hexene and the tetraphosphate hexene with acrylic acid and methacrylate to obtain the modified polycarboxylate surfactant. The modified polycarboxylate surfactant prepared by the preparation method disclosed by the invention has excellent dispersing performance, heat storage stability and relatively high suspension rate.

The present invention relates to the technical field of surfactants, and discloses a preparation method of a modified polycarboxylate surfactant and its application in pesticide preparations. The present invention uses 3-hexene-1,6-diamine and epichlorohydrin as raw materials, and obtains 1,6-tetraglycidylamine-3-hexene through ring opening and ring closing reactions. 1,6-tetraglycidylamine-3-hexene is used twice to react with sodium bisulfite and phosphoric acid in sequence to obtain tetrasulfonate-based hexene and tetraphosphate-based hexene, and then the two are copolymerized with acrylic acid and methacrylate to obtain a modified polycarboxylate surfactant. The modified polycarboxylate surfactant prepared by the present invention has excellent dispersibility, heat storage stability and high suspension rate.

The disclosure provides a catalyst reaction mixture including a ligand having a backbone with at least one phosphorus atom and at least one nitrogen atom, a chromium compound, and a solvent mixture including decalin and at least one additional solvent, wherein the solvent mixture comprises decalin in an amount of less than 20 wt. % and, optionally, perhydroindane in an amount of 50 wt. % or less, based on the total weight of the solvent mixture. A method of forming a linear alpha olefin through ethylene oligomerization is also provided, the method including contacting ethylene gas with a reaction mixture in a reactor, the reaction mixture including the catalyst reaction mixture of the disclosure; and withdrawing a product stream including at least one linear alpha olefin, such as 1-butene, 1-hexene, or 1-octene, from the reactor.

The invention belongs to the technical field of molecular sieve synthesis, and discloses a preparation method of a TS-1 molecular sieve for phenol hydroxylation, which comprises the following steps: dropwise adding tetraethyl orthosilicate into an aqueous solution containing tetrapropylammonium hydroxide; after clarification, dropwise adding a solution containing tetrabutyl titanate and isopropanol into the solution; carrying out hydrothermal crystallization, centrifugation, drying and calcination; the preparation method comprises the following steps: adding silica gel into an aqueous solution of tetrapropylammonium bromide and ethanolamine; dropwise adding a solution containing tetrabutyl titanate and isopropanol into the solution; adding a seed crystal; carrying out hydrothermal crystallization, centrifugation, drying and calcination; dissolving in an aqueous solution of tetrapropylammonium bromide and ethanolamine; and carrying out hydrothermal crystallization, centrifugation, drying and calcination. The method is low in cost and simple to operate, a large number of mesopores are formed in the molecular sieve, the diffusion mass transfer rate is increased, the content of hexa-coordinated titanium is greatly increased, and the catalyst has good catalytic activity in 1-hexene epoxidation, cyclohexene epoxidation, propylene epoxidation and phenol hydroxylation reactions.

The invention relates to the field of organic synthesis, in particular to a synthetic method of 1-(2, 6, 6-trimethyl-1, 3-cyclohexadiene-1-yl) ethanone, and particularly relates to a synthetic method of 1-(2, 6, 6-trimethyl-1, 3-cyclohexadiene-1-yl) ethanone by taking 4-acetyl-3, 5, 5-trimethylcyclohexene as a raw material and carrying out bromination and elimination steps to synthesize the 1-(2, 6, 6-trimethyl-1, 3-cyclohexadiene-1-yl) ethanone. The method has the advantages of easily available raw materials and high reaction yield, and can be industrially implemented on a large scale.

The present invention relates to the technical field of ethylene oligomerization catalysts, and discloses a ligand compound, a selective ethylene oligomerization catalytic composition and application thereof, and a selective ethylene oligomerization reaction method, the ligand compound has a structure represented by a formula (1) # imgabs0 #, Ar and Ar'are independently selected from substituted or unsubstituted aryl or heteroaryl; 1, 2-positions are substituted or unsubstituted cyclic substituents. The ligand compound is applied to a selective ethylene oligomerization catalytic composition, high ethylene trimerization and tetramerization catalytic activity can be obtained, hexene-1 and octylene-1 selectivity is high, the high-molecular polymer content is low, the risk of scaling and blocking of a reaction pipeline in a continuous reaction can be greatly reduced, and the selectivity of ethylene oligomerization is high. Good industrial application prospects and economic values are realized.

A propylene polymer composition made from or containing:a) from 15 wt % to 35 wt % of a propylene 1-hexene copolymer containing from 6.2 to 8.5% by weight, of 1-hexene derived units and having a Melt Flow Rate from 3.5 to 8.5 g / 10 min;b) from 15 wt % to 35 wt % of a propylene 1-hexene copolymer containing from 10.4 wt % to 14.5 wt %, of 1-hexene derived units and having a Melt Flow Rate from 3.5 to 8.5 g / 10 min; andc) from 38 wt % to 68 wt % of a propylene ethylene copolymer containing from 3.4 wt % to 5.7 wt % of ethylene derived units and having a Melt Flow Rate from 3.5 to 12.0 g / 10 min,wherein the sum of the amount of a), b) and c) being 100.

The invention discloses a bacteriostatic food packaging bag and a preparation method thereof, and relates to the technical field of food packaging, the bacteriostatic food packaging bag comprises the following components by weight: 12-22 parts of bamboo fiber; 55 to 80 parts of TPS (Thermoplastic Polystyrene); 15-20 parts of a modified ethylene composite copolymer; 15 to 20 parts of modified chitosan; wherein the modified ethylene composite copolymer is obtained by polymerizing active group-containing ethylene and one of vinyl acetate, butene, hexene or octylene according to a molar ratio of 10: (3-6); the active group is at least one of amino and sulfonic acid group; the modified chitosan is sulfo-grafted chitosan, and the mass grafting rate is greater than 0.1 wt%. The preparation method has the advantages that the compatibility of a composition formula is improved through the modified ethylene composite copolymer and the modified chitosan, a uniform net structure is formed in a cross-linking reaction to serve as a supporting framework, the overall mechanical structure performance is enhanced through the bamboo fibers which are synergistically and uniformly distributed in the composition formula, and the degradable and non-toxic effects are achieved through the cooperation of the bamboo fibers and the TPS.

The invention relates to the field of pouring sealants, and discloses a modified epoxy resin pouring sealant and a preparation method thereof, the pouring sealant comprises epoxy resin, a modified inorganic filler, a modified additive and an auxiliary agent; the modified inorganic filler is prepared by grafting a quaternized s-triazine derivative and an inorganic filler; the quaternized s-triazine derivative is prepared through the steps that 3, 5-diaminophenylboronic acid, cyanuric chloride, 3-chloropropyltrimethoxysilane and 1, 4-butanediamine are sequentially subjected to substitution to prepare a s-triazine derivative, then the s-triazine derivative reacts with N, N-dimethyl-1, 3-diaminopropane, and bromoethane is used for quaternization treatment. The modified additive is prepared from a modified bismaleimide monomer prepared from maleic anhydride and 5 (6)-amino-1-(4-aminophenyl)-1, 3, 3-trimethylindane and 1-methyl-4-isopropyl cyclohexene through a self-stabilization precipitation polymerization method, the prepared pouring sealant is high in tensile strength, good in impact resistance and good in mechanical property, and the prepared pouring sealant has the advantages of being good in mechanical property, good in mechanical property and good in mechanical property. Meanwhile, good heat resistance, flame retardance, dielectricity and antibacterial activity are achieved.

The invention discloses cyclohexene formate esterase, a mutant of cyclohexene formate esterase and application of cyclohexene formate esterase in production of (S)-3-cyclohexene-1-formic acid. According to the cyclohexene formate esterase and the mutant disclosed by the invention, 100-400g / L of racemic 3-cyclohexene-1-methyl formate can be split by taking wet thalli subjected to induced expression or crude enzyme liquid obtained by ultrasonically crushing the wet thalli as a catalyst, so that (S)-3-cyclohexene-1-formic acid with chemical purity and optical purity reaching 99% or above is synthesized. The enzyme activity of the cyclohexene formate esterase mutant provided by the invention is further improved, the reaction time and the catalyst dosage are obviously reduced compared with those of a substrate with the same catalysis concentration before mutation, the reaction condition is mild, the operation is relatively simple and convenient, and the cyclohexene formate esterase mutant has a very good industrial application prospect.

The invention relates to a polypropylene material and a preparation method thereof, and discloses a high molecular weight propenyl elastomer toughened polypropylene blend composite material and a preparation method thereof. The preparation method comprises the following steps: toughening polypropylene by using a high-molecular-weight propenyl elastomer; the high-molecular-weight propenyl elastomer is prepared from propylene monomers and comonomers (one or more of 1-butene, styrene, 1-hexene, 1-octylene, 1-decene and the like) through a quinoline amino binuclear metal hafnium catalyst and co-catalysts (tri-pentafluorophenyl boron, triphenylcarbonium tetra (pentafluorophenyl) borate, aluminoxane, aluminum alkyl and the like). And one or more of alkyl aluminum chloride and the like). According to the present invention, the polypropylene-based blend composite material has characteristics of PP toughness improving, excellent strength and excellent rigidity maintaining, and excellent low temperature toughness, specifically, after the toughening modification, the normal temperature (25 DEG C) toughness and the low temperature (-25 DEG C) toughness of the polypropylene-based blend composite material are significantly improved, and the tensile strength change is not significant. Therefore, the invention has original innovation, and provides a new direction for the development of the field of polyolefin materials.

The invention discloses environment-friendly wormwood cloud wool and a preparation method thereof, and relates to the technical field of cloud wool. The preparation method comprises the following steps: adding titanium dioxide powder into an ethyl sorbate solution, coating a polyethyl sorbate film through an in-situ polymerization method, hydrolyzing ethyl sorbate to release carboxyl to obtain modified titanium dioxide powder, and mixing the modified titanium dioxide powder with waste polyester and wormwood powder to form a spinning solution; secondly, N, N, N ', N'-tetramethyl-p-phenylenediamine and 6-iodine-1-hexene are subjected to a reaction to prepare quaternary ammonium salt, double bonds are introduced into a compound, then the compound and 11-mercaptoundecyltrimethoxysilane are subjected to an ultraviolet click reaction, and mercapto modified quaternary ammonium salt is prepared; sulfydryl modified quaternary ammonium salt is used as an antistatic agent to be added into a spinning solution, the environment-friendly wormwood cloud wool is prepared through wet spinning, sulfydryl modification is beneficial to uniform dispersion of the quaternary ammonium salt in the spinning solution, and uneven fiber structure or breakage caused by uneven dispersion of an additive is reduced. The environment-friendly wormwood cloud velvet prepared by the preparation method disclosed by the invention has antibacterial and antistatic effects.

The present invention discloses a homo-polymeric and co-polymeric wax inhibitor (WI) useful for the flow of waxy crude oil and their synthesis thereof. The WI(s) comprises of any one of C14 to C24 fatty alcohol or mixture thereof in 2 mol % to 50 mol %, and an unsaturated organic acid i.e. acrylic acid, and poly alpha olefins i.e. poly alpha hexene, poly alpha octene, poly alpha decene, poly alpha dodecene of composition ranging from about 0.01 wt % to 20 wt % wherein the average molecular weight of poly alpha olefins used ranged from 1000 to 10000. A method of preparing a series of WI(s) with varying compositional ratios of the fatty alcohols, acrylic acid and polyalpha olefins targeting a wide range (C17 to C65 or beyond) of wax present in waxy crude oil is also disclosed.

The invention provides a polyethylene composite film. The polyethylene composite film comprises a surface layer, a middle layer and a heat sealing layer which are sequentially stacked, wherein the surface layer is composed of 58%-76% of hexene copolymerized metallocene linear low density polyethylene, 18%-37% of low density polyethylene and a small amount of slipping agent and anti-blocking agent; the middle layer is composed of 79%-88% of octene copolymerized metallocene medium density polyethylene, 5%-21% of hexene copolymerized metallocene linear low density polyethylene and 6%-15% of high density polyethylene; and the heat sealing layer is composed of 47%-65% of hexene copolymerized metallocene linear low density polyethylene, 33%-45% of low density polyethylene and 2%-5% of a tackifier. According to the composite film disclosed by the invention, through gradient design of each layer of material, the whole composite film has rigidity and toughness, and the composite film is particularly suitable for manufacturing stand-up bag packages which stand stably and are compression-resistant and impact-resistant.

The invention relates to the technical field of power cables, and provides a high-toughness corrosion-resistant power cable which comprises a conductor, and an insulating layer, an armor layer and a sheath layer are sequentially arranged on the outer side of the conductor. The sheath layer comprises the following raw materials in parts by weight: 35-45 parts of polyethylene, 35-45 parts of methyl vinyl silicone rubber, 35-48 parts of nitrile rubber, 6-8 parts of a plasticizer, 20-30 parts of filler, 1-2 parts of an antioxidant, 1-2 parts of a vulcanizing agent and 10-13 parts of a functional aid; the functional additive is prepared from the following raw materials: zinc oxide, cinnamic acid and cyclohexenecarboxylic acid. According to the technical scheme, the problem of poor toughness of the sheath layer of the corrosion-resistant power cable in the prior art is solved.

The invention discloses an acid-alkali-resistant high-weather-resistant insulating powder coating as well as a preparation method and application thereof in the aspect of sound screens of high-speed guardrails, and relates to the technical field of fluorocarbon resin powder coatings. The insulating powder coating with acid and alkali resistance and high weather resistance is prepared from the following raw materials in parts by weight: 15 to 25 parts of fluorocarbon resin, 40 to 50 parts of polyester resin, 5 to 12 parts of curing agent, 0.5 to 2 parts of accelerant, 3 to 8 parts of corrosion-resistant agent, 2 to 5 parts of weather-resistant agent, 1 to 2 parts of flatting agent, 0.3 to 1 part of benzoin and 10 to 15 parts of inorganic nano filler. The preparation method comprises the following steps: reacting 4-trifluoromethylphenol with 6-bromo-1-hexene to obtain an intermediate 1, generating an intermediate 2 from the intermediate 1 under the action of m-chloroperoxybenzoic acid, and reacting the intermediate 2 with amino-terminated polyether to generate the corrosion-resistant agent. The acid-base-resistant high-weather-resistant insulating powder coating prepared by the invention has good acid-base resistance, heat aging resistance and light aging resistance.

The invention discloses a method for preparing high-density aviation fuel by catalyzing turpentine with Bronsted acid. The method comprises the following specific steps: step 1, regulating the strength of Bronsted acid to catalyze the isomerization reaction of terpenoids in turpentine, firstly generating cyclohexene and cyclohexadiene intermediates, and then performing Diels-Alder dimerization addition reaction on the intermediates generated by isomerization under the catalysis of the acid to generate a polycyclic high-density fuel precursor with the carbon number of 20; and 2, carrying out hydrogenation on C = C double bonds in the double-ring structure of the high-density aviation fuel precursor with the carbon number of 20 under the catalysis of a hydrogenation catalyst so as to generate the high-density aviation fuel. The invention provides a novel method for preparing high-density aviation fuel from biomass platform compound turpentine, and the whole preparation process is simple and convenient to operate.

The present application relates to compositions comprising E-1,1,1,2,2,5,5,6,6,6-decafluoro-3-hexene (E-HFO-153-10mczz, E-CF3CF2CH=CHCF2CF3) processes of preparing such compositions and their use.

The invention relates to the technical field of cyclohexene hydration and catalysts, and discloses a modified ZSM-5 molecular sieve and application thereof in cyclohexanol preparation through cyclohexene hydration. The modified ZSM-5 molecular sieve comprises a ZSM-5 molecular sieve inner core, the inner core is subjected to sulfonation treatment after broaching, and then the surface of the inner core is coated with SiO2 to form a core-shell structure; and carrying out hydrophobic modification on the ZrO2-SiO2 coated SO3H-ZSM-5 molecular sieve, and depositing a zirconium oxide layer on the surface of the ZrO2-SiO2 coated SO3H-ZSM-5 molecular sieve to obtain the ZrO2-SiO2 coated The molecular sieve is used as a catalyst in a cyclohexene hydration reaction, the conversion rate reaches 25% or above, the selectivity reaches 99.5% or above, the activity is still stable after the molecular sieve is recycled 6 times, the catalyst is excellent in catalytic performance, a new thought is provided for a current two-phase catalytic reaction, and meanwhile the molecular sieve is expected to be applied to a cyclohexene hydration industrial device.

The invention provides a composition for luring bactrocera cucurbitae and application thereof, and relates to the technical field of green prevention and control of agricultural pests. The composition comprises the following active ingredients in percentage by weight: 10% of muscovone, 0.1% of heptanal and 0.1% of hexene. The main components of the composition all come from natural plant volatile matters, and the composition is easy to degrade in the natural environment, has no residual risk and is friendly to the ecological environment. Meanwhile, the composition has high safety to bees, pollination insects and other non-target organisms, and ecological side effects possibly brought by traditional chemical attractants are effectively avoided. According to the implementation of the method, an efficient and specific tool is provided for field monitoring of bactrocera cucurbitae populations, the occurrence dynamic of the bactrocera cucurbitae can be accurately mastered, the early warning capability is improved, a new technical path and an implementation basis are provided for promoting green comprehensive treatment of the bactrocera cucurbitae, and the method has good popularization and application prospects.

A method for separating and purifying 4MP1 from a mixture containing 4MTP2 and 1-Hexene comprises the following steps: continuously introducing a solution in which 4MTP2, 1-Hexene and 4MP1 with any concentration are dissolved into a simulated moving bed chromatography system as a raw material solution, collecting a high-purity 4MP1 solution from raffinate of the simulated moving bed chromatography system by adopting a metal organic framework material as a stationary phase, and separating the high-purity 4MP1 solution from the raffinate of the simulated moving bed chromatography system. The extraction liquid is a solution containing impurities 4MTP2 and 1-Hexene. The invention provides a brand new method for separating 4MP1 from 4MTP2 and 1-Hexene, and a complete separation scheme is provided for the prior art; in the separation of high-concentration 4MP1, the relative purity of the separated and purified 4MP1 can reach gt; the recovery rate is gt; and in the separation of low-concentration 4MP1, the rectification level is also exceeded, and the method is more suitable for 4MP1 thermosensitive substances.

The invention belongs to the technical field of catalysts, and particularly relates to application of a non-noble metal supported catalyst in catalytic hydrogenation reaction and a method for catalyzing 5-methyl-3-hexene-2-ketone hydrogenation by using the non-noble metal supported catalyst to obtain methyl isopentanone. The invention provides application of a non-noble metal supported catalyst in catalytic hydrogenation reaction. The non-noble metal supported catalyst comprises a composite carrier and an active component supported in the composite carrier, the composite carrier is aluminum oxide and lanthanum oxide, and the active component comprises iron, cobalt, copper or nickel. The non-noble metal supported catalyst provided by the invention can provide catalytic active site density and electron transfer efficiency which are equivalent to or even better than those of a noble metal catalyst under interaction of an active center structure, electronic characteristics and a carrier; meanwhile, the unique d electron orbital characteristic is beneficial to stabilization of a reaction intermediate and reduction of transition state activation energy, so that the catalyst cost is remarkably reduced while the selectivity of catalytic hydrogenation is remarkably improved.

The invention discloses a preparation method of a near-infrared two-region fluorescently-labeled phospholipid molecule and a preparation method of a lipid nano-carrier of the phospholipid molecule, and relates to the field of preparation methods of cyanine dyes. The invention aims to solve the technical problems that the application of the organic cyanine dye in a living body is limited by the hydrophobicity of the organic cyanine dye and the fluorescence intensity is low due to the aggregation quenching effect of the organic cyanine dye. The method comprises the following steps: preparing a compound 2 from 1, 8-naphthalimide and iodohexane, and then preparing C6 from the compound 2, 2-chloro-3-(hydroxymethylene)-1-cyclohexene-1-formaldehyde and sodium acetate; then C6 and mercaptobenzoic acid are used for preparing C6-COOH; the preparation method comprises the following steps: preparing C6-Lipid from N, N-diisopropylethylamine, HBTU, C6-COOH and 4-(1, 2, 2-triphenylvinyl) aniline by virtue of a hydrothermal method; the preparation method comprises the following steps: preparing a lipid nano-carrier from C6-Lipid, DMPC (Dimethyl Pyrrolidone), DOPE (Dioctyl Olefin Polyethylene) and According to the phospholipid molecule and the lipid nano-carrier thereof prepared by the invention, effective imaging of fluorophores is realized, and aggregates such as J aggregation and the like are possibly generated, so that the fluorescence quantum yield is improved, and an efficient fluorescence imaging effect is achieved. The cyanine dye prepared by the invention is used for fluorescence imaging.

The invention discloses preparation of a lamellar Ti-MWW titanium silicalite molecular sieve and application of the lamellar Ti-MWW titanium silicalite molecular sieve in epoxidation reaction, and belongs to the technical field of synthesis of inorganic chemicals. According to the method, polycyclic aliphatic amines are added in the Ti-MWW molecular sieve synthesis process, the crystallization temperature is reduced in the initial crystallization stage of the molecular sieve to delay the growth speed of the C-axis of the molecular sieve, and the thin-layer Ti-MWW with the shorter C-axis is obtained, so that the diffusion performance of the Ti-MWW molecular sieve is greatly improved, the diffusion rate of reactant molecules in pore channels is increased, and the performance of the Ti-MWW molecular sieve is improved. Therefore, the catalytic performance of the molecular sieve is greatly improved, and the molecular sieve is suitable for catalyzing liquid-phase epoxidation reactions of propylene, butylene, hexene, cyclohexene and octene and the like.

The invention discloses a 27.5 KV positive feeder insulation coating material and a preparation method thereof, and relates to the field of coatings. The 27.5 KV positive feeder insulation coating material prepared by the invention is prepared by the following steps: reacting furan with 6-bromo-1-hexene to obtain a comonomer, and reacting the comonomer, polytetrafluoroethylene and ethylene to obtain a copolymer; the preparation method comprises the following steps: protecting maleic anhydride by furan, reacting with 3-aminopropyl methyl dimethoxy silane, performing deprotection to obtain modified silane, and reacting the modified silane with octamethylcyclotetrasiloxane to obtain polysiloxane; the copolymer, the modified polysiloxane, the antioxidant 1010 and methylbenzene react to prepare a base material, and then the base material, the coupling agent and the wear-resistant agent are evenly mixed and discharged to prepare the wear-resistant coating. The 27.5 KV positive feeder insulation coating material prepared by the invention has good tensile strength and self-repairing performance, can realize self-repairing under a heating condition, and prolongs the service cycle of the material.

The invention relates to the technical field of petroleum drilling fluid loss reduction, and discloses an anti-divalent salt fluid loss agent for drilling fluid, which is prepared by the following steps: step 1, beta-cyclohexylamine and 6-chloro-1-hexene are subjected to a reaction to obtain alkenyl beta-cyclohexylamine; step 2, initiating polymerization of alkenyl beta-cyclopentadiene, a hyperbranched monomer pentaerythritol triallyl ether and 2-acrylamide-2-methylpropanesulfonic acid under the action of azobis (isobutylamidine hydrochloride), so as to obtain an intermediate A; 3, 3-dimethylamino-1-propylamine and palmitic acid are subjected to a reaction, and an intermediate 2 is obtained; 4, the intermediate 2 and benzyl chloride are subjected to a reaction, and quaternary ammonium salt modified fatty acid is obtained; and 5, stirring and mixing the intermediate A, quaternary ammonium salt modified fatty acid and coupling agent modified walnut powder to obtain the divalent salt resistant filtrate reducer for the drilling fluid. The anti-divalent salt filtrate reducer for the drilling fluid has a relatively good anti-divalent salt effect.

The invention relates to the technical field of microcapsules, in particular to watermelon essence and a preparation method thereof. The watermelon essence is composed of a composite core material and a wall material, the composite core material comprises a watermelon aldehyde pre-clathration core material, cis-3-hexenol, trans-2-hexenal, beta-ionone, leaf acetate and other flavor substances, and the wall material is coated with a pre-clathration layer and a composite nano layer from inside to outside in sequence. The three-stage process of reducing high-temperature volatilization loss in the preparation process through watermelon aldehyde pre-clathration, realizing precise cladding through nano-emulsification and preparing micro powder through spray drying and curing is adopted, so that the three problems of thermal instability, poor slow release property and high cost existing in the field of watermelon essence for a long time are solved, and the watermelon essence has the advantages of high embedding rate, uniform particle size distribution, low cost and the like. The effects of resisting high-temperature processing and prolonging the slow release property are achieved.

An integrated process for producing E-1,1,1,2,2,5,5,6,6,6-decafluoro-3-hexene and uses of the products produced in this process.

The invention discloses a sandwich structure catalyst for preparing adipic acid through cyclohexene oxidation based on a metal organic framework material, and belongs to the technical field of chemical synthesis, the structure of the catalyst is as follows: magnetic iron oxide nanospheres are loaded with heteropolyacid nanodots, and the outer layer is coated with a porous metal organic framework shell. The catalyst has excellent magnetic recovery performance, large specific surface area and open pore channels, and has the advantages of high catalytic activity, easy recovery, stable structure and the like. The excellent performance shows that the sandwich structure catalyst has important application value in reactions for preparing adipic acid through cyclohexene oxidation and the like.