44 results about "Cinnamyl alcohol" patented technology

The invention discloses a hydrogenation catalyst as well as a preparation method and application thereof. The hydrogenation catalyst comprises a molecular sieve coated with a metal oxide layer and active metal loaded on the metal oxide layer; the metal oxide layer is selected from at least one of titanium oxide, zinc oxide, zirconium oxide or niobium oxide, and the active metal is selected from at least one of Pt, Pd, Ru, Ir or Ni. The catalyst provided by the invention is used in cinnamyl aldehyde hydrogenation reaction, and has good cinnamyl aldehyde conversion rate and cinnamyl alcohol selectivity.

A pest control composition includes from about 4 wt % to about 10 wt % of sodium lauryl sulfate; one or more C5 to C9 hydrotropic salt; from about 1 wt % to about 10 wt % of one or more active ingredients selected from the group consisting of corn mint oil, peppermint oil, spearmint oil, rosemary oil, thyme oil, citronella oil, clove oil, cedarwood oil, cinnamon oil, geranium oil, eugenol, 2-phenylethyl propionate, menthol, menthone, thymol, carvone, camphor, methyl salicylate, p-cymene, linalool, geraniol, cinnamyl acetate, cinnamic alcohol, cinnamaldehyde, citronellol, eucalyptol / 1,8-cineole, alpha-pinene, bornyl acetate, gamma-terpinene, and combinations thereof; and from about 60 wt % to about 95 wt % of water. The pest control composition exhibits a water peak in a 2H spectrum having a width encompassing 90% of the area of the entire water signal of about 50 Hz or more, as determined by the 2H NMR Method.

The invention develops a cascade reaction strategy for realizing efficient synthesis of a caged ketal skeleton compound by taking Bronsted acid as a catalyst and taking a 3-hexene-2, 5-diketone derivative and a cinnamyl alcohol analogue as substrates, and synthesizes a natural product (+ / -)-catunaregin and a series of novel analogues of the natural product (+ / -)-catunaregin which are not reported in literatures. Important technical support and early-stage theoretical basis are provided for the creation of new drugs of the compounds. The cinnamyl alcohol analogue disclosed by the invention is simple and easy to prepare, wide in derivation range and low in price, and can better enrich the structural diversity of caged ketal skeleton compounds. The method disclosed by the invention can be prepared by a one-pot method, is efficient and rapid, simple to operate, short in reaction step, good in substrate tolerance, mild in reaction condition and wide in application range, and overcomes the defects of complex operation, harsh reaction conditions, substrate limitation, intolerant substrate functional groups, tedious steps and the like in the traditional reaction.

This invention relates to the field of flavoring technology, specifically to a flavoring containing coffee and cocoa compound extracts and its preparation method. The invention uses coffee extract, cocoa extract, isoprene acetate, menthol, cinnamyl alcohol, linalool, sodium octenyl succinate starch, locust bean gum, sodium di(lauramide-glutamine)lysine, an alcohol solvent, and water to prepare the flavoring. It reduces the amount of alcohol solvent used and employs sodium octenyl succinate starch, locust bean gum, and sodium di(lauramide-glutamine)lysine to increase the green safety of the flavoring, while reducing the adverse effects of organic solvents on human health and the environment. The flavoring of this invention has good heat and cold resistance, excellent stability, and is easy to store, transport, and use. It can also effectively improve the aroma quality of tobacco products and reduce off-flavors, showing good application prospects in cigarettes, cigars, and other products.

The invention discloses an application of UDP (User Datagram Protocol) glucosyltransferase in microbial production of rosavin and rosavin. The UDP glucosyltransferase is used for catalyzing cinnamyl alcohol and UDP-glucose to generate rosai and is coded by an OsUGT13 gene of oryza sativa, and the catalytic efficiency of the UDP glucosyltransferase is 3.6 times that of UDP glucosyltransferase coded by a Bs-YjiC gene from bacillus subtilis. The method can be used for large-scale industrial production of rosavin and the derivative rosavin thereof, and has application value.

The invention discloses a carbon nano bowl-shaped catalyst, a preparation method and application of the carbon nano bowl-shaped catalyst in paired electric synthesis of cinnamyl aldehyde and 3-phenylpropanol from cinnamyl alcohol, the catalyst comprises a carbon nano bowl-loaded nickel catalyst and a carbon nano bowl-loaded palladium catalyst, and a flowing diaphragm type electrolytic cell is adopted for reaction, taking a carbon nano bowl loaded nickel catalyst as an anode chamber electrode, and dissolving cinnamyl alcohol in an alkaline solution to serve as anolyte; the method comprises the following steps: by taking cinnamyl alcohol as a raw material, taking a carbon nano bowl loaded palladium catalyst as a cathode chamber electrode, dissolving cinnamyl alcohol in an acid solution as a cathode solution, carrying out paired electrosynthesis reaction at the temperature of 15-60 DEG C, the current density of 50-150mA / cm < 2 > and the cell voltage of 1-8V for 0.3-3.0 hours, and after the reaction is finished, carrying out post-treatment to obtain cinnamyl aldehyde and 3-phenylpropanol. The paired electrosynthesis process is mild in condition, high in raw material conversion rate and good in selectivity, compared with a commonly-adopted noble metal catalyst and a single-groove synthesis technology, the used carbon nano bowl-shaped catalyst is low in cost, and the paired electrosynthesis technology is high in energy utilization rate.

The application discloses a cobalt silicate modified platinum-based catalyst, a preparation method and application, and belongs to the technical field of industrial catalysts. The platinum-based catalyst comprises a carrier, a cobalt silicate modification layer generated in situ on the carrier, and platinum nanoparticles loaded on the cobalt silicate modification layer; the cobalt silicate modification layer is a continuous fibrous structure and is covalently combined with the carrier through Si-O-Co bonds. The cobalt silicate modification layer realizes anchoring and electron transfer of the platinum nanoparticles, makes the platinum in an electron-rich state, weakens adsorption on an alpha, beta-unsaturated aldehyde C=C bond, and strengthens selective adsorption on a C=O bond; when the catalyst is applied to selective hydrogenation of alpha, beta-unsaturated aldehydes, the conversion rate of cinnamyl aldehyde can reach 98.2%, the selectivity of cinnamyl alcohol can reach 92.0%, and the catalyst is suitable for hydrogenation of various alpha, beta-unsaturated aldehydes such as aromatic aldehydes, aliphatic aldehydes and furan aldehydes, and has excellent catalytic activity, selectivity and stability, and good industrial application prospect.

A pest control composition having from about 4 wt % to about 10 wt % of sodium lauryl sulfate, one or more C5 to C9 hydrotropic salt, from about 1 wt % to about 10 wt % of an active ingredient selected from the group consisting of corn mint oil, peppermint oil, spearmint oil, rosemary oil, thyme oil, citronella oil, clove oil, cedarwood oil, cinnamon oil, geranium oil, eugenol, 2-phenylethyl propionate, menthol, menthone, thymol, carvone, camphor, methyl salicylate, p-cymene, linalool, geraniol, cinnamyl acetate, cinnamic alcohol, cinnamaldehyde, citronellol, eucalyptol / 1,8-cineole, alpha-pinene, bornyl acetate, gamma-terpinene, and combinations thereof, and from about 60 wt % to about 95 wt % water. The pest control composition can exhibit a tan delta-1 value at a frequency of 1 Hz of from about 0.1 to about 2.

The present invention discloses a hydrogenation catalyst, a method for preparing the catalyst, and an application thereof. The method for preparing the hydrogenation catalyst comprises: dissolving an organic ligand in a first organic solution to obtain a ligand solution; dissolving a zinc salt in a second organic solution to obtain a zinc salt solution; adding the zinc salt solution to the ligand solution under stirring to carry out a coordination reaction to obtain a crude precursor; vacuum drying the crude precursor to obtain a precursor; and calcining the precursor to obtain the catalyst. The catalyst prepared by this method is particularly suitable for the preparation of cinnamyl alcohol by transfer catalytic hydrogenation of cinnamaldehyde, has a high cinnamyl alcohol hydrogenation conversion rate and cinnamyl alcohol selectivity, and has certain cyclic stability.

To provide a bee repellent in order to prevent damage to honeybees, which are not the intended target of pesticides applied to crops or pesticides used to control carnivorous bees such as hornets and paper wasps. [Solution] A bee repellent comprising one or more components selected from tetradecane, furfuryl alcohol, cinnamyl alcohol, cinnamaldehyde, 3-methyl-2-butenal, methyl cinnamate, geranyl formate, allyl cyclohexanepropionate, isoquinoline, borneol, carvacrol, δ-dodecalactone, β-ionone, quinoline, butylamine, and citronella oil as active ingredients.

This invention provides a method for preparing a fermentation broth to improve the aging quality of cigar tobacco leaves, comprising the following steps: extracting cigar tobacco leaves with water and filtering to obtain a filtrate; mixing the filtrate with glucose, alcohol, and lactic acid bacteria for fermentation to obtain a fermentation broth; mixing the fermentation broth with alcohol, concentrating the supernatant, and filtering to obtain cigar tobacco leaf fermentation product; extracting tamarind with 50% ethanol, filtering, and concentrating to obtain tamarind extract; dissolving the tamarind extract with alcohol, filtering, and concentrating to obtain tamarind pure oil; and mixing the cigar tobacco leaf fermentation product, tamarind pure oil, lactic acid, citric acid, acetic acid, deer tongue extract, hawthorn extract, benzaldehyde, ethyl hexanoate, ethyl maltol, oak chip extract, cinnamyl alcohol, plum extract, glycerol, and propylene glycol to obtain a fermentation broth. The fermentation broth provided by this invention can shorten the aging time of tobacco leaves and save costs. It can also improve the quality of tobacco leaves, promote the migration of aging aroma substances, enrich the aroma substances of tobacco leaves, and improve the quality of tobacco leaves.

According to the method for preparing cinnamyl alcohol through cinnamyl aldehyde hydrogenation, isopropyl alcohol is adopted as a hydrogen source and a solvent of a reaction system, precious metal modified TiO2-CeO2 is adopted as a catalyst, and cinnamyl aldehyde is subjected to selective hydrogenation under visible light and normal temperature and pressure to synthesize cinnamyl alcohol. According to the invention, isopropanol is used as a hydrogen source and a solvent, so that high-pressure hydrogen is avoided, and potential safety hazards in the reaction process are remarkably reduced; the precious metal modified TiO2-CeO2 can be excited under visible light, normal temperature and normal pressure to perform selective hydrogenation on cinnamyl aldehyde to synthesize cinnamyl alcohol; according to the present invention, the use amount of the noble metal in the hydrogenation reaction system is significantly reduced, the conversion rate of the selective hydrogenation is high, the good economy and sustainability are provided, the preparation process is simple, the industrial mass production is easily achieved, and the green chemical development direction is met.

The present application relates to cinnamyl aldehyde selective hydrogenation technical field, specifically to a kind of Pt nanoparticle supported porous SiC catalyst and its application in cinnamyl aldehyde hydrogenation reaction.The selectivity of cinnamyl alcohol is lower in conventional cinnamyl aldehyde selective hydrogenation reaction, it is difficult to reach more than 90%.For the above technical problem, the present application provides a kind of Pt nanoparticle supported porous SiC catalyst, mainly utilizes acid etching method to carry out porous modification to polycrystalline SiC, by adjusting the Si / C ratio of its surface to enhance the hydrogen overflow concentration of the obtained catalyst Pt / SiC surface, Pt nanoparticle in the channel of catalyst can preferentially adsorb C=O bond in reaction and make it active, so as to realize the high activity of the obtained catalyst in cinnamyl aldehyde hydrogenation reaction and the high selectivity of cinnamyl alcohol product.

The invention discloses application of cinnamyl alcohol in prevention and treatment of sweet potato soft rot, and belongs to the technical field of biology. Experiments find that low-concentration cinnamyl alcohol (200-400 [mu] g.ml <-1 >) can significantly inhibit soft rot pathogenic bacteria, can help eliminate or relieve sweet potato soft rot, provides a new way for safe and efficient prevention and treatment of sweet potato fungal diseases, provides a theoretical basis for cinnamyl alcohol development of a green biological fresh-keeping agent for sweet potato postharvest storage, and has broad application prospects. The method has important application value for reducing dependence on chemical pesticides and guaranteeing food safety in sweet potato production.

The invention belongs to the technical field of catalysts, and particularly discloses a quantum dot modified Pt / SiC catalyst as well as a preparation method, an activation method and application thereof. Quantum dot modified SiC serves as a carrier of the catalyst, Pt is loaded on the surface of the carrier through a liquid phase reduction method, the quantum dot modified Pt / SiC catalyst is obtained, and through modification of CeO2 QDs, adsorption of C = O in cinnamyl aldehyde is enhanced. The invention also provides a method for improving the hydrogenation performance by using a hydrogen overflow activated catalyst, and the Pt / CeO2 QDs-SiC catalyst subjected to activation pretreatment further enhances the adsorption of C = O and improves the hydrogenation selectivity, so that the cinnamyl aldehyde can be efficiently and selectively hydrogenated to generate cinnamyl alcohol under milder conditions.

The invention discloses a cinnamyl aldehyde segmented temperature control preparation method based on styrene and paraformaldehyde, and relates to the technical field of cinnamyl aldehyde processing.According to the cinnamyl aldehyde segmented temperature control preparation method based on styrene and paraformaldehyde, styrene and paraformaldehyde are adopted as raw materials and are low in price and easy to obtain; compared with a cinnamyl alcohol oxidation method, the raw material cost can be reduced by more than 40%; through segmented temperature control integrated reaction, the steps of washing for multiple times, column chromatography purification and the like are omitted, the single-batch production period is shortened to be within 8 hours, and equipment investment and energy consumption are reduced; segmented temperature control reduces side reactions, short-path distillation purification is combined, the product purity can reach 90% or above, and the yield is increased to 70% or above; by adding hydroquinone and regulating and controlling the temperature, the reaction system is prevented from being sticky, and the industrial amplification feasibility is high.

This application provides a catalyst for the selective hydrogenation of cinnamaldehyde to cinnamyl alcohol, its preparation method, and its uses, relating to the field of catalysts. The catalyst for the selective hydrogenation of cinnamaldehyde to cinnamyl alcohol comprises an active component, a metal promoter, and a support; the active component is nano-Pt clusters, the metal promoter is W, and the support is a porous material; the active component and the metal promoter exist in the form of composite nano-clusters within the pores and on the outer surface of the support. The catalyst preparation method includes: mixing a water-soluble tungsten salt precursor, ethylene glycol, and water, adjusting the pH to strongly acidic to obtain a metal promoter solution; adding the Pt precursor to the metal promoter solution, and performing a photoprecipitation reaction under ultraviolet light irradiation to obtain a tungsten oxide-modified Pt nanoparticle sol; adding the support to the Pt nanoparticle sol, stirring, impregnating for adsorption, washing, and drying to obtain the catalyst. The catalyst provided in this application exhibits significantly superior selectivity for the target product cinnamyl alcohol.

The invention discloses a compound melanterite pill specific chromatogram and a construction method and a quality detection method thereof, and belongs to the field of Chinese patent medicine detection. Taking different batches of compound melanterite pills as test articles to prepare a compound melanterite pill test article solution; the method comprises the following steps: taking gallic acid, ginsenoside Rg1, procyanidine B2, cinnamic acid, coumarin, ginsenoside Rh1, cinnamyl alcohol, cinnamaldehyde, arachidonic acid, epicatechin, 2-methoxycinnamic acid, ginsenoside Rb1, ginsenoside Rd, betulinic acid and 5-hydroxymethylfurfural as reference substances to prepare a single reference substance solution; performing chromatographic analysis on the compound melanterite pill test solution and the single reference substance solution, and recording chromatograms; carrying out similarity analysis; and constructing the characteristic chromatogram of the compound melanterite pill according to the chromatogram of the test solution of the compound melanterite pill and the chromatogram of the single reference substance solution in combination with the total ion chromatogram obtained by the high-resolution mass spectrum and the mass spectrum result map of the chemical components. The method can accurately, clearly and objectively evaluate the quality of the compound melanterite pill.

The application discloses a photo-thermal dual-curing resin based on pyromellitic dianhydride and cinnamyl alcohol, which is composed of 4-6 parts of bio-based cinnamyl alcohol, 5-9 parts of hydroxyethyl methacrylate, 4-6 parts of pyromellitic dianhydride, 4-6.5 parts of bio-based epoxy soybean oil, 0.04-0.07 parts of a first catalyst, 0.07-0.09 parts of a polymerization inhibitor, 0.1-0.2 parts of a second catalyst and 0.4-0.7 parts of a photoinitiator in terms of weight parts; the first catalyst is at least one selected from 4-dimethylaminopyridine, p-toluenesulfonic acid, triethylamine and stannous octoate; and the second catalyst is triphenylphosphine. By introducing a rigid benzene ring structure (from PMDA) and multiple photosensitive groups (acrylate double bonds and cinnamyl double bonds), the application effectively solves the problems of low mechanical strength and poor thermal stability of a cured product of pure epoxy soybean oil-based resin. The obtained resin has excellent thermal performance, mechanical strength and high bio-based content.

The present application discloses an aluminum oxide-coated film for high-barrier packaging and a preparation method thereof, belonging to the field of thin films. An aluminum oxide-coated film for high-barrier packaging comprises a substrate, one side of which is alternately provided with multiple polyurethane coatings and multiple aluminum oxide coatings, wherein the layer structure closest to the substrate and the layer structure farthest from the substrate are both polyurethane coatings; the polyurethane coating is formed by curing a polyurethane coating, and the polyurethane coating contains a hydroxy acrylate emulsion, an isocyanate curing agent, an auxiliary agent and water; the hydroxy acrylate emulsion is reacted with cinnamyl alcohol and a long-chain isocyanate, and the resulting amino ester product is then polymerized with a hydroxy acrylate monomer and an acrylic acid monomer to obtain the result. The present application has the advantages of reducing the difficulty of producing solar backsheets and maintaining high barrier properties.

The invention belongs to the field of crossing of nano materials and coordination chemistry, and particularly relates to a cationic Pd nano-cluster and a preparation method thereof. The invention provides a cationic Pd nano-cluster, the molecular general formula of the cationic Pd nano-cluster is [Pd4 (DPPM) 4 (PPH)] X2, DPPM is bis (diphenylphosphino-methane), PPH is phenylphosphine without two hydrogen atoms, and the PPH is coordinated with a palladium cluster core through two phosphorus atoms; and X is a catalytically acceptable anion. The cationic Pd nano-cluster single crystal material is prepared by a method of combining solution phase reduction with ligand protection. The prepared cationic Pd nano-cluster is loaded on a carbon-based material to form a high-performance composite electro-catalysis material, so that cinnamyl alcohol is generated through selective electro-catalysis of cinnamyl aldehyde hydrogenation, and the problem that cinnamyl alcohol is difficult to generate cinnamyl alcohol through selective electro-catalysis of cinnamyl aldehyde hydrogenation by an existing metal catalyst (such as commercial palladium carbon with the weight being 10%) is effectively solved.

The invention relates to application of a rare earth-based catalyst. The application comprises the step of carrying out hydrogenation reaction on hydrogenation raw materials in the presence of the supported catalyst Ir / CeO2 to obtain alcohol, wherein the hydrogenation raw material is selected from one or more of furfural, 5-hydroxymethylfurfural, 5-methylfurfural, m-tolualdehyde, benzaldehyde, phenylacetaldehyde, phenylpropionaldehyde, p-fluorobenzaldehyde, cinnamyl aldehyde, cinnamyl alcohol, cyclobutanone, cyclopentanone, cyclohexanone, cycloheptanone, tetrahydropyran-4-ketone, tetrahydrothiapyran-4-ketone, crotonaldehyde and terephthalaldehyde; the catalyst is prepared by a method comprising the following steps: mixing a CeO2 carrier with a solution containing a metal Ir precursor, and reacting under heating and alkaline conditions to obtain a catalyst precursor; and calcining and reducing the catalyst precursor to obtain the supported catalyst Ir / CeO2. The rare earth-based catalyst is simple in preparation process, mild in condition, high in hydrogenation activity and good in stability.

The invention discloses an antibacterial toothbrush wire material and a preparation method thereof. The brush wire material comprises a thermoplastic polymer matrix and at least one of zinc cinnamate, calcium cinnamate or magnesium cinnamate dispersed in the thermoplastic polymer matrix. The cinnamic acid metal salt is excellent in thermal stability in a brush wire melting processing process, and the problem of antibacterial failure caused by high-temperature volatilization of traditional cinnamyl alcohol or cinnamyl aldehyde can be effectively avoided; after being formed, the brush wires are subjected to alkaline damp-heat post-treatment, so that the cinnamic acid metal salt can be partially hydrolyzed, cinnamic acid substances are released, and the cinnamic acid substances are enriched on the surface layers of the brush wires; in a subsequent oral use environment, the substance is further converted into cinnamyl alcohol or cinnamyl aldehyde with high antibacterial activity, so that the antibacterial efficiency is remarkably improved. The antibacterial rate of the obtained brush wire on common oral pathogens such as staphylococcus aureus is larger than or equal to 88%, the mechanical property is excellent, and various colors such as red, blue and green can be achieved by adding pigments. The technical problem that the natural cinnamon antibacterial agent is difficult to apply to the high-temperature spinning process is solved, and the method has functionality and attractiveness and is suitable for industrial production.

Escherichia coli flagellum is a potential target for research and development of escherichia coli infection anti-virulence drugs. Researches find that the Escherichia coli flagellum inhibitor has important significance on prevention and control of Escherichia coli The invention relates to a medical application of cinnamyl alcohol in preparation of an escherichia coli flagellum inhibitor, and tests such as an escherichia coli sliding motion inhibition test, a minimum inhibitory concentration determination test, a growth curve test, a greater wax moth survival rate test, an escherichia coli adhesion to Hela cell inhibition test and the like. It is verified that cinnamyl alcohol can inhibit bacterial flagellum-mediated electrophoresis on the premise that bacterial growth is not inhibited, and therefore the pathogenicity of escherichia coli is reduced. Cinnamyl alcohol exists in Peru balsam, cinnamon leaves, hyacinth oil, storax balsam and the like in an ester form, is commonly used as a fixative and a modifier, and is also an important medical raw material. Cinnamyl alcohol has the characteristics of low cost, no drug resistance and drug residue, has a wide application prospect, and provides a new way and a potential natural compound for prevention and treatment of escherichia coli infection.

A pest control composition includes (i) from about 4 wt% to about 10 wt% of sodium lauryl sulfate; (ii) one or more C5 to C9 hydrotropic salt; (iii) from about 1 wt% to about 10 wt% of one or more active ingredients selected from the group consisting of corn mint oil, peppermint oil, spearmint oil, rosemary oil, thyme oil, citronella oil, clove oil, cedarwood oil, cinnamon oil, geranium oil, eugenol, 2-phenylethyl propionate, menthol, menthone, thymol, carvone, camphor, methyl salicylate, p-cymene, linalool, geraniol, cinnamyl acetate, cinnamic alcohol, cinnamaldehyde, citronellol, eucalyptol / 1,8- cineole, alpha-pinene, bornyl acetate, gamma-terpinene, and combinations thereof; (iv) from 1% to 5% by weight of a solvent, wherein the solvent is a C1-C4 alcohol, and (v) 60 wt% to about 95 wt % of water. The pest control composition exhibits a water peak in a H spectrum having a width encompassing 90% of the area of the entire water signal of about 50 Hz or more, as determined by the H NMR Method. A method of controlling one or more weeds by contacting the said weeds with the pest control composition.

A pest control composition includes from about 4 wt % to about 10 wt % of sodium lauryl sulfate; a C5 to C9 hydrotropic salt; from about 1 wt % to about 12 wt % of one or more active ingredients chosen from corn mint oil, peppermint oil, spearmint oil, rosemary oil, thyme oil, citronella oil, clove oil, cedarwood oil, cinnamon oil, geranium oil, eugenol, 2-phenylethyl propionate, menthol, menthone, thymol, carvone, camphor, methyl salicylate, p-cymene, linalool, geraniol, cinnamyl acetate, cinnamic alcohol, cinnamaldehyde, citronellol, eucalyptol / 1,8-cineole, alpha-pinene, bornyl acetate, gamma-terpinene, or combinations thereof; and from about 60 wt % to about 95 wt % of water. The ratio of hydrotropic salt to sodium lauryl sulfate of from about 0.15 to about 0.9. The pest control composition exhibits a receding contact angle of less than 21 degrees.

The application discloses a method for preparing cinnamyl alcohol by hydrogenating cinnamyl aldehyde. The method comprises the following steps: in a reactor, under a non-active gas atmosphere, mixing isopropanol with cinnamyl aldehyde, and contacting the mixture with a catalyst to obtain cinnamyl alcohol by reaction; the catalyst is composed of a carrier and cobalt particles loaded on the surface of the carrier; the size of the cobalt particles is 2-30 nm, and the cobalt particles are highly dispersed; and the loading amount of the cobalt particles in the catalyst is 30-70 wt%. The biomass alginate with low price is used as a carbon source, and the preparation method is simple and easy to implement. The catalyst has the advantages of high Co loading amount, small Co particle size and high dispersion, and exhibits good catalytic activity and cinnamyl alcohol selectivity in the selective hydrogenation reaction of cinnamyl aldehyde.

The invention provides an antibacterial lyocell fiber and a preparation method thereof, and the preparation method of the lyocell fiber comprises the following steps: S1, adding a cinnamyl alcohol extract and alkylphenol polyoxyethylene ether into an ethanol / water mixed solvent to obtain an emulsion; s2, putting lyocell fibers into water to swell, washing and drying, dipping the lyocell fibers into the emulsion under the atmosphere of ultrasonic and protective gas, carrying out grafting reaction, washing and drying to obtain the antibacterial lyocell fibers. In the invention, water can generate free radicals under the action of ultrasonic irradiation, and the free radicals can initiate a grafting reaction, so that antibacterial active components such as cinnamic acid containing carbon-carbon double bonds, cinnamyl aldehyde and the like in the cinnamyl alcohol extract are combined to the fiber through chemical bonds, and the lyocell fiber is endowed with an antibacterial effect.

The application relates to the technical field of compound synthesis, and particularly discloses a preparation method of an intermediate of toripalimab citrate, which comprises the following steps: a first reaction of cinnamyl alcohol and diethyl phosphite in an organic solvent to obtain a first reactant; and a second reaction of the obtained first reactant, alkali and 4-[2-(N,N-dimethylamino)ethoxy]benzophenone to obtain a second reactant containing the intermediate I of toripalimab citrate. A brand-new process route is developed, raw materials used in the route are all easy to obtain, the whole reaction route is short, operation is simple, reaction conditions are mild and safe, the yield of the obtained intermediate I of toripalimab citrate is high, the purity is also high, the total yield is more than 80%, the purity is more than 99.9%, and industrialized production can be realized.

The invention belongs to the technical field of biomass resource conversion, and discloses preparation of a Pt-based intermetallic compound and application of the Pt-based intermetallic compound in conversion of straw derivatives into high-value chemicals. The supported Pt-Sb intermetallic compound catalyst with controllable components is designed and prepared by adopting a co-impregnation method aiming at the problems of more byproducts and low selectivity of the existing catalyst in unsaturated aldehyde hydrogenation. The geometric and electronic structures of the Pt active center are modulated by Sb, so that Pt has an electron-rich characteristic, and the catalytic performance is remarkably improved. Under a mild condition, an ethanol-water mixed solvent is taken as a solvent, and the conversion rate of 99% of cinnamyl aldehyde and the selectivity of 91% of cinnamyl alcohol are realized by preferably selecting the catalyst Pt3Sb2 / C, which are far better than those of the traditional Pt / C catalyst. Meanwhile, the catalyst has excellent cycle stability, the reaction process is environment-friendly, and the raw material utilization rate is high. The method provided by the invention provides an efficient catalysis technical support for high-value utilization of straw resources and synthesis of green bio-based chemicals, and has a relatively good industrial application prospect.