40 results about "Cyclohexene" patented technology

The invention discloses a preparation method and application of a high-purity cannabidiol heptyl derivative CBDP, and belongs to the technical field of organic synthesis compounds. In order to solve the technical problems of low purity, complex process and high cost of cannabidiol heptyl derivatives in the prior art, the invention provides a preparation method with high purity and simple preparation process. The key points of the technical scheme are as follows: (1) 5-heptylresorcinol and (1S, 4R)-1-methyl-4-(1-methylvinyl)-2-cyclohexene-1-alcohol are dissolved in a solvent and react under the action of a Lewis acid catalyst, and a cannabidiol heptyl derivative CBDP is obtained; (2) dissolving a cannabidiol heptyl derivative CBDP in a solvent, reacting with a derivatization reagent, and purifying to obtain an intermediate 7; and (3) dissolving the intermediate 7 in a solvent, and purifying through an enzyme hydrolysis reaction to obtain the high-purity cannabidiol heptyl derivative CBDP.

The application discloses a kind of preparation of thin-layer Ti-MWW titanium silicalite and its application in epoxidation reaction, belong to inorganic chemical synthesis technical field.The application adds polycyclic aliphatic amine in the synthesis process of Ti-MWW molecular sieve, and reduces the crystallization temperature in the early stage of molecular sieve crystallization to delay the growth rate of molecular sieve C axis, obtain shorter C axis thin-layer Ti-MWW, greatly improve the diffusion performance of Ti-MWW molecular sieve by this method, increase the diffusion rate of reactant molecules in channel, so that the catalytic performance of molecular sieve is greatly improved, suitable for catalyzing propylene, butylene, hexene, cyclohexene, octene liquid phase epoxidation and the like.

The invention provides a low-melting-point nucleating agent and a preparation method thereof, and relates to the technical field of nucleating agents. The low-melting-point nucleating agent comprises the following raw materials in parts by weight: 100 parts of sorbitol, 150-220 parts of an aldehyde mixture, 800-1200 parts of an organic solvent, 2-4 parts of a catalyst and 25-35 parts of a silane coupling agent, wherein the aldehyde mixture is prepared from 2, 4-dimethyl-3-cyclohexene-1-formaldehyde, 3, 5-di-tert-butyl-4-hydroxy benzaldehyde and terephthalaldehyde, and the aldehyde mixture is prepared from 2, 4-dimethyl-3-cyclohexene-1-formaldehyde, 3, 5-di-tert-butyl-4-hydroxy benzaldehyde and terephthalaldehyde. According to the low-melting-point nucleating agent and the preparation method thereof, an alpha crystal form with better heat resistance is induced to be generated, polypropylene is induced to form a uniform and fine crystal nucleus, the mechanical property of the polypropylene is enhanced, the haze is greatly reduced, and the transparency is improved.

The present application relates to the technical field of catalyst, in particular to a preparation method of TS-1 molecular sieve for olefin epoxidation; the main preparation method is as follows: tetraethyl orthosilicate is added dropwise into an aqueous solution containing tetrapropylammonium hydroxide; after the solution is clarified, a solution containing tetrabutyl titanate and isopropanol is added dropwise; after hydrolysis is completed, guanidine acetate is added; the precursor solution is obtained after stirring at a certain temperature for a period of time; the obtained solution is loaded into a kettle, and the crystallization product is obtained after hydrothermal crystallization; finally, the sheet-shaped TS-1 molecular sieve is obtained through centrifugation, drying and calcination; the present application has low cost, simple operation, short synthesis period, small size in the b-axis direction, improved diffusion mass transfer rate, and good catalytic activity in 1-hexene epoxidation, cyclohexene epoxidation, propylene epoxidation, chloropropylene epoxidation and phenol hydroxylation reaction.

The invention provides a liquid crystal composition, a liquid crystal display device containing the liquid crystal composition and application of the liquid crystal display device. The liquid crystal composition comprises at least one compound as shown in a general formula I and at least one compound as shown in a general formula II. According to the liquid crystal composition disclosed by the invention, through mutual compounding of specific structures and contents of the compounds, the liquid crystal composition has relatively large elastic constant, relatively high penetration rate, relatively small rotary viscosity and relatively good Flicker value on the basis of maintaining proper dielectric anisotropy, relatively good optical anisotropy and relatively good clearing point; the performance advantages of a compound containing a cyclohexene structure are considered, the defects of low-temperature storage stability and the like can be overcome, and the low-temperature storage stability is relatively good; a liquid crystal display device comprising the liquid crystal composition has a relatively high response speed, a relatively large contrast ratio and a relatively wide temperature application range; the liquid crystal display panel is applied to a high-contrast fast-response NFFS liquid crystal display mode. # imgabs0 #

The invention provides a preparation method of an N-alkoxy hindered amine light stabilizer Tinuvin 152, which comprises the following steps of: performing one-step oxidation process on 2, 2, 6, 6-tetramethyl-4-piperidone serving as a raw material and hydrogen peroxide to obtain a free radical intermediate II, performing alkylation reaction on the free radical intermediate II and cyclohexene to obtain an N-alkoxy piperidone intermediate as shown in a formula III, and preparing the N-alkoxy hindered amine light stabilizer Tinuvin 152 by using the N-alkoxy hindered amine light stabilizer Tinuvin 152. The intermediate and n-butylamine are subjected to hydrogenation reduction under the catalysis of 10% palladium on carbon, and 1-cyclohexyloxy-4-(n-butylamino)-2, 2, 6, 6-tetramethylpiperidine shown in the formula IV is prepared. Then carrying out substitution reaction on the formula IV and cyanuric chloride to obtain a disubstituted intermediate V with high selectivity; reacting the intermediate V with ethanolamine at a high temperature to prepare an N-alkoxy hindered amine light stabilizer Tinuvin 152; the intermediate product obtained by the process is high in yield, good in purity, short in reaction time, simple in post-treatment and convenient to operate; the product can effectively absorb ultraviolet rays, material aging and discoloration are prevented, and the service life of the product is prolonged.

The invention relates to the technical field of nucleating agents, in particular to a modified nucleating agent, a preparation method and application of the modified nucleating agent in polypropylene. The modified nucleating agent is prepared from the following raw materials: 2, 4-dimethyl-3-cyclohexene-1-formaldehyde, a benzaldehyde compound, sorbitol, a solvent and a modifier. The modifier comprises an alkyl chain of C8 to C15; the modifier is limited to contain C8-C15 alkyl chains, so that the agglomeration rate of the nucleating agent can be effectively reduced, and meanwhile, the compatibility of the modified nucleating agent and polypropylene is improved; the modified nucleating agent prepared by the invention has a lower melting point (150-180 DEG C), and has a more excellent heterogeneous nucleation effect in application of polypropylene, so that the comprehensive performance of polypropylene is improved.

The invention discloses a method for preparing delta-damascone by using an iodine catalyst, and belongs to the technical field of flavors and fragrances. Comprising the following steps: taking 1, 3-pentadiene and isopropylidene acetone which are cheap and easy to obtain as raw materials, taking iodine as a catalyst, performing D-A reaction to synthesize 4-acetyl-3, 5, 5-trimethyl cyclohexene, and condensing the 4-acetyl-3, 5, 5-trimethyl cyclohexene and ethyl acetate in the presence of a basic catalyst to obtain 1-(2, 6, 6-trimethyl-3-cyclohexene-yl)-1, 3-butanedione; according to the present invention, the iodine catalyst is adopted to replace the traditional Lewis acid catalyst, such that the waste acid water caused by the Lewis acid post-treatment is reduced, and the method has characteristics of simple operation, safety and environmental protection. In addition, the reaction is carried out under relatively mild conditions, so that the dangerousness of the reaction process is reduced, and industrial production is easy to realize.

This invention belongs to the field of heterogeneous catalyst technology. It provides a single-atom nitrogen-doped carbon catalyst, its preparation, and its application. Ammonium metavanadate is dissolved in hot water, melamine is added to the resulting solution, and the mixture is stirred until the water evaporates to obtain a powder. The powder is collected, ground to a particle size of less than or equal to 50 micrometers, and calcined to obtain a nitrogen-doped carbon material (VN@NC support). The nitrogen-doped carbon material is weighed and dispersed in methanol and / or an aqueous solution, a metal salt aqueous solution is added, and the dispersion is stirred at room temperature and then centrifuged and dried. The resulting solid is pyrolyzed for 1-5 hours to obtain the single-atom nitrogen-doped carbon catalyst. This invention solves the problems of unsafe storage and transportation of peroxides and low reaction selectivity in organic peroxide oxidation methods. This catalyst exhibits high activity, high selectivity, and good stability, and can be used for efficient catalysis of cyclohexene epoxidation to prepare cyclohexane oxide under mild reaction conditions.

The invention discloses an asymmetric synthesis method of bicyclo[2.2.2]octane-2,5-dione, wherein 2-cyclohexene-1-one is reacted with triphenylchlorosilane as a reaction substrate, the obtained intermediate 1 is reacted with trifluoroethyl acrylate under the action of a precatalyst and trifluoromethanesulfonic acid, and the generated intermediate 2 is mixed with ethylene glycol and p-toluenesulfonic acid monohydrate to obtain intermediate 3, which is reduced by an organic reducing agent to generate intermediate 4, which is reacted with the reactants of oxalyl chloride and dimethyl sulfoxide, and triethylamine is added and stirred to generate intermediate 5, which is oxidative deformylation and acid hydrolysis to generate bicyclo[2.2.2]octane-2,5-dione. The synthesis method has short synthesis steps, simple operation, and high product yield.

This invention discloses an isothiocyanate liquid crystal compound containing 2,5-difluorosubstituted benzene and its synthesis method. The general structural formula of the disclosed compound is shown in Figure I, wherein R is an alkyl or alkoxy group with 1-10 carbon atoms, an alkenyl or alkenoxy group with 2-10 carbon atoms, a cycloalkyl group with 3-8 carbon atoms, or an alkyl group substituted with a cycloalkyl group, wherein the hydrogen atom on the carbon atom can be substituted with fluorine; Z1 and Z2 are single bonds, -C≡C-, -CH=CH-, -CF=CF-, -CH2CH2; ring A and ring B are benzene rings or cyclohexane, cyclohexene, wherein the hydrogen atom on the benzene ring can be substituted with fluorine, chlorine, methyl, or ethyl; n = 0, 1, 2. The liquid crystal compound of this invention has the advantages of a wide nematic phase temperature range, low viscosity, and high birefringence.

The invention discloses a coal dressing compound collecting agent and a preparation method thereof. The coal dressing compound collecting agent comprises the following raw materials in parts by weight: 100 parts of non-polar hydrocarbon oil, 10-50 parts of fatty acid and 1-10 parts of a surfactant, wherein the surfactant is prepared from 2-hexadecyl octadecanoic acid amido betaine and a quaternized guar gum high-molecular surfactant, and the surfactant is prepared from the following raw materials in parts by weight; the non-polar hydrocarbon oil is one or more of diesel oil, paraffin oil, poly-alpha-olefin, cyclohexene and C10-C20 olefin; the fatty acid is one or more of stearic acid, oleic acid, octanoic acid, palmitic acid and lauric acid. The coal dressing compound collecting agent can form a more stable structure with low-rank coal under the action of acting force such as hydrogen bonds, so that the collecting performance of the collecting agent on the low-rank coal is improved, and the yield of clean coal is increased.

The application discloses a liquid crystal composition with low viscoelastic ratio, large dielectric adjustability and low dielectric loss and a high-frequency component, and the liquid crystal composition comprises one or more compounds represented by a general structure I; wherein R is alkyl with 1-10 carbon atoms, alkoxy, fluorinated alkyl, alkenyl with 2-10 carbon atoms, alkenyloxy, fluorinated alkenyl, fluorinated alkenyloxy, cycloalkyl with 3-8 carbon atoms or cycloalkyl-containing substituted alkyl; Z1 and Z2 are single bond, -C=C-, -CH=CH-, -CF=CF-, -CH2CH2; ring A and ring B are benzene ring or cyclohexane, cyclohexene, wherein the hydrogen on the benzene ring can be substituted by fluorine, chlorine, methyl or ethyl; and n=0 or 1. The liquid crystal composition has the advantages of large dielectric tuning rate, extremely low dielectric loss, low rotational viscosity, large elastic constant, wide nematic phase working temperature range and large low-frequency dielectric constant.

The present application relates to the fine chemical technology field, specifically to a kind of HI catalytic preparation 2-phenyl benzene-1,3-thioxin cyclohexene-4-ketone method.The yield of 2-phenyl benzene-1,3-thioxin cyclohexene-4-ketone synthesized by conventional method is low.For the above technical problem, the present application provides a kind of HI catalytic preparation 2-phenyl benzene-1,3-thioxin cyclohexene-4-ketone method, which is to add thiosalicylic acid, benzaldehyde, HI into organic solvent, and stir at a temperature higher than room temperature to obtain 2-phenyl benzene-1,3-thioxin cyclohexene-4-ketone.The raw materials in the method are easy to obtain, the operation is simple, the equipment requirement is low, the yield is as high as 95%, and it has good application prospect.

The invention relates to the field of chemistry, in particular to a compound shown in a formula (I), a preparation method and application thereof. The compound as shown in the formula (I) has remarkable biological membrane inhibition activity, can be used for preparing antibiotic drugs, and has good development and application prospects.

A thermoplastic resin composition of the present invention comprises: about 100 parts by weight of a polycyclohexylenedimethylene terephthalate resin having a crystallization temperature (Tc) of about 140 to about 170 °C for 10-15 mg of a sample, as measured using a differential scanning calorimeter (DSC) at a heating rate of 10 °C / min and a cooling rate of -5 °C / min; and about 35 to about 110 parts by weight of a polycarbonate resin. The thermoplastic resin composition has low oxygen permeability and has excellent chemical resistance, excellent high-temperature stability, excellent transparency, and an excellent balance of these properties.

The present invention relates to an anisotropically conductive heat activated adhesive composition, comprising a) one or more thermoplastic resin; b) metal coated particles; and c) a solvent selected from the group consisting of l-methoxy-2- propanylacetate,2-butoxyethyl acetate, 2-(2-butoxyethoxy)ethanol, [2-(2-butoxyethoxy)-ethyl]acetate, 2-butoxyethanol, isophorone, 3, 3, 5-trimethyl-2-cyclohexene-l-one, dimethyl succinate, dimethyl glutarate, dimethyl adipate, acetic acid, l-methoxypropan-2-ol, 1- methoxy-2-propylacetat, dipropylene glycol (mono)methylether, toluene, ethanol, isopropyl alcohol, n-propanol, ethoxy propanol, ethylacetate, butyl acetate, n-propyl acetate, isopropyl acetate, methyl ethyl ketone, methyl isobutyl ketone, glycol ethers and mixtures thereof, wherein the one or more thermoplastic resin is dissolved into the solvent. The composition can be used in electronic devices.

The invention discloses a diacid compound preparation method, which comprises: mixing a cyclic organic matter solution with micro-nano inert polymer particles to obtain a mixed solution, introducing gas into the mixed solution to generate micron bubbles, forming a gas-water interface, and carrying out a bubbling reaction to obtain a diacid compound, the cyclic organic matter in the cyclic organic matter solution comprises one or more of cyclohexanone, cyclohexene, cyclohexane or cyclohexanol; a solvent in the cyclic organic matter solution comprises water. The cyclic organic matter is oxidized to generate the diacid compound by means of the special oxidation capacity of the microbubble gas-water interface and the contact electro-catalysis technology, the preparation method can be carried out at normal temperature and normal pressure, additional oxidizing agents and catalysts do not need to be added, and the method is environmentally friendly and low in preparation cost.

The invention relates to a tobacco flavor presenting fresh and sweet fruity flavor, flavor adsorption particles and application of the tobacco flavor and the flavor adsorption particles in cigarettes. The tobacco flavor comprises fingered citron peel essential oil, ocimene, linalool, beta-phellandrene, limonene, cyclohexene and beta-caryophyllene. Six specific spice components are creatively combined to form the mixed spice, compared with single fingered citron peel essential oil serving as a spice, the components in the spice are mutually matched and have a synergistic effect, fresh and sweet fruity flavor can be provided when cigarettes are smoked, the fruity, sweet and faint scent characteristics of the cigarettes are obviously improved, the aroma harmony is good, and the flavor of the cigarettes is greatly improved. The smoke characteristic of the cigarette can be improved; and after the perfume is used for slow release treatment, the stability of the fresh and sweet fruity flavor can be maintained, and the flavor of the perfume cannot be changed due to the change of the original proportion of the components in the slow release process, so that the stability of sensory expression is realized, and the sensory quality of tobacco products is comprehensively improved.

The present disclosure relates to the field of antimicrobial compositions. More particularly, it concerns the use of a composition as an antimicrobial agent, the composition comprising ingredients selected from the group consisting of: (i) nona-2,6-dien-1-ol in combination with at least one ingredient selected from the group consisting of 3-neopentylpyridine, 2-methylhexan-3-one oxime, terpineol and 2-isopropyl-5-methylphenol; (ii) gamma-dodecalactone in combination with at least one ingredient selected from the group consisting of 1-Methyl-4-(1-methylethenyl)-cyclohexene, 4-Methoxybenzaldehyde, and 1,3-Benzodioxole-5-carbaldehyde; (iii) (Z)-3,7-Dimethyl-2,6-octadien-1-ol and gamma-dodecalactone; (iv) cis-4(Isopropyl)cyclohexanemethanol and 4-Methoxybenzaldehyde; and (v) 1,3-Benzodioxole-5-carbaldehyde and 4-Methoxybenzaldehyde, wherein the ingredients are present in an amount sufficient to provide an antimicrobial effect. The composition and its use for the preparation of antimicrobially active perfuming compositions and consumer products are also objects of the disclosure.

This invention discloses a class of tumor-targeting prodrug compounds that synergistically enhance photodynamic / chemotherapy through azoreductase activation, their preparation method, and their application in selectively killing cancer cells and treating tumors. The first objective is to provide a class of tumor-targeting prodrug compounds that synergistically enhance photodynamic / chemotherapy through azoreductase activation. These compounds possess the properties of positively charged cyanine dyes, allowing them to target tumor sites and localize to the mitochondria of cancer cells to a certain extent. Through simultaneous activation of azoreductase, photosensitizers and chemotherapeutic drugs are released, achieving selective killing of cancer cells and targeted tumor therapy. The second objective is to provide a method for preparing the prodrug compound. In an anhydrous system, an indole compound containing an R1 group and modified with different substituents at the benzene ring position is reacted with 2-chloro-3-(hydroxymethylene)-1-cyclohexene-1-carboxaldehyde to obtain compound IV. Then, compound IV is reacted with m-nitrophenol and reduced to obtain compound V. Finally, compound V undergoes a diazotization reaction with sodium nitrite, and a compound containing an R2 group is added to continue the reaction to obtain the target prodrug compound.

The invention relates to the technical field of building materials, and particularly discloses self-repairing concrete and a preparation method thereof. The self-repairing concrete comprises the following components in parts by mass: 330-350 parts of cement; 65 to 75 parts of fly ash; 9-11 parts of silica fume; 9-11 parts of a self-repairing agent; 7-9 parts of high-molecular water-absorbent resin; 1.9 to 2.1 parts of modified fiber; 1730 to 1760 parts of aggregate; 4.8 to 5.2 parts of a water reducing agent; 155 to 165 parts of water; the self-repairing agent is a compound of a cement-based capillary crystalline material and nano silicon dioxide; the modified fibers are obtained by soaking and modifying glass fibers in a modifying solution; the modified liquid is a compound of a solvent, p-chloromethyl benzoic acid, dimer acid and cyclohexene oxide. The method has the advantages that the anti-cracking performance of the concrete is well improved, and the cost is reduced.

The invention belongs to the technical field of formamidine perovskite cells, and particularly relates to a preparation method of a formamidine perovskite active layer and a perovskite solar cell thereof. According to the formamidine perovskite solar cell provided by the invention, a 3, 5, 5-trimethyl-2-cyclohexene-1-ketone additive is added when the formamidine perovskite active layer is prepared. Compared with the prior art, the method has the following beneficial technical effects that 3, 5, 5-trimethyl-2-cyclohexene-1-ketone contains carbonyl and other functional groups, and can interact with lead iodine octahedrons in a solution in the phase forming process, so that generation of harmful intermediate phases is reduced, crystals with more ordered orientation, larger size and better quality are formed, and the film forming quality is improved. Meanwhile, the non-volatilized additive components are repelled to the grain boundary after phase splitting is finished, the effect of passivating the bulk phase grain boundary is achieved, the defect state density of the active layer is reduced, and therefore the photoelectric conversion efficiency and stability of the formamidine perovskite solar cell device are improved.

This invention discloses a method for the highly selective oxidation of cyclohexene to cyclohexenone using rare-earth-based perovskite, relating to the field of cyclohexene oxidation for cyclohexenone preparation technology. It addresses the problems of existing methods being either not environmentally friendly enough, having insufficiently mild reaction conditions, or having long reaction times. This invention involves adding cyclohexene, a rare-earth-based perovskite catalyst, and a liquid-phase reaction medium to a photoreaction tube, heating the resulting mixture to 60–80°C and maintaining the temperature, intermittently introducing oxygen as an oxidant, and reacting fully under light and stirring conditions to obtain the product. This invention is simple and convenient to operate, and can complete the catalytic oxidation in a short time under mild reaction conditions with low temperature and no pressure required. The reaction process is green and mild, with high cyclohexene conversion and high selectivity for cyclohexenone, and low production cost, making it suitable for large-scale production.

The invention provides a supported catalyst for phenol hydroalkylation as well as a preparation method and application of the supported catalyst. The catalyst consists of a metal site and a molecular sieve carrier and is prepared by adopting a dissolution recrystallization method, and a silicate species is formed through reaction between metal and a dissolved molecular sieve silicon source, so that the metal is effectively stabilized and the aggregation of the metal is inhibited; in the recrystallization process, metal is encapsulated in the molecular sieve crystal, and meanwhile, a micro-medium composite molecular sieve carrier is constructed. According to the catalyst, high-density Bronsted acid sites in pore channels are fully utilized, the alkylation reaction of phenol and cyclohexene generated in situ is remarkably promoted, and the selectivity of cyclohexylphenol is improved. Meanwhile, the micro-dielectric composite structure effectively weakens diffusion limitation, and generation of polycyclic oxygen-containing by-products is remarkably reduced. According to the invention, green in-situ construction of a metal site and an acid site of the catalyst is realized, and the yield of cyclohexylphenol produced by hydroalkylation of phenol is greatly improved.

This invention provides a cyclohexene glycoside-based fertilizer for increasing crop yield and efficiency, its preparation method, and its application. The method first prepares an aqueous solution of the cyclohexene glycoside substrate, and then prepares a nutrient matrix consisting of at least two of nitrogen, phosphorus, and potassium components mixed with an organic carrier. Next, nutrient-converting functional bacteria and cyclohexene glycoside-activating functional bacteria are separately cultured and then compounded to form a synthetic bacterial agent with specific β-glucosidase activity and an effective viable count. The cyclohexene glycoside substrate is then loaded onto diatomaceous earth particles with high open porosity to obtain a stabilized carrier. Subsequently, the carrier, nutrient matrix, and synthetic bacterial agent are mixed, and granulated under the condition of adding a binder to obtain wet granules. Finally, the granules are dried at low temperature in two stages until the moisture content is ≤8 wt%, and then granulated to obtain the finished fertilizer. This fertilizer integrates the active components of cyclohexene glycosides, compound nutrients, and functional microorganisms, which can synergistically promote crop growth and nutrient utilization, and is suitable for a variety of crops, achieving increased yield and efficiency.

This invention discloses an energy-saving and consumption-reducing process for the aqueous production of cyclohexanol, characterized by the following steps: 1) The oil phase product discharged from the reactor is first flash-evaporated; 2) The flash-evaporated vapor phase enters the cyclohexanol separation tower, and the liquid phase after flash evaporation enters the filtration equipment; 3) The filtered clear liquid enters the cyclohexanol separation tower, and the catalyst particles are discharged from the filtration equipment. The advantages of this invention are: eliminating the safety hazards caused by flash evaporation of the feed liquid in the cyclohexanol separation tower; reducing the flow rate entering the filtration equipment after flash evaporation, thus reducing the investment in the required filter equipment; and allowing for secondary liquid-liquid separation within the flash evaporation equipment, reducing the amount of water entering the cyclohexanol separation tower and lowering its energy consumption.

The present invention provides a liquid crystal composition, a liquid crystal display device comprising same, and the use thereof. The liquid crystal composition of the present invention comprises at least one compound of general formula I and at least one compound of general formula II. In the liquid crystal composition of the present invention, on the basis of maintaining an appropriate dielectric anisotropy, a relatively good optical anisotropy, and a relatively good clearing point, by means of the mutual compounding of the specific structures and contents of compounds, the composition has a relatively large elastic constant, a relatively high transmittance, a relatively low rotational viscosity, and a relatively good Flicker value, has the performance advantages of a compound containing a cyclohexene structure, and can also compensate for defects such as low-temperature storage stability, and has good low-temperature storage stability, such that the liquid crystal display device comprising the liquid crystal composition has a relatively high response speed, a relatively large contrast ratio and a relatively wide temperature usage range. The liquid crystal display device is used in a high-contrast and fast-response NFFS liquid crystal display mode.

A butadiene cyclization polymerization method is characterized in that the method uses 1,3-butadiene as a raw material, and a cyclization polymerization reaction occurs at 30-90 DEG C in the presence of a heterogeneous catalyst composed of an EMM-23 molecular sieve subjected to silanization treatment and titanium supported thereon, and an alkyl aluminum chloride as a cocatalyst, so that 1,5,9-cyclododecatriene, 1,5-cyclooctadiene and 4-vinyl cyclohexene with high selectivity are obtained.