69 results about "Citronellal" patented technology

The invention relates to degradable ceramic body mud and a manufacturing method thereof, and belongs to the technical field of ceramics. Comprising the following steps: grinding, crushing and sieving calcined talc, wollastonite, phlogopite and yttria-stabilized zirconia, adding stearic acid and a carboxymethyl chitosan solution, carrying out ball-milling mixing, adding polyhydroxy citronellal and absolute ethyl alcohol in a nitrogen atmosphere, carrying out constant-temperature stirring, filtering out a solvent, drying, adding isobutanol and an aluminum-zirconium coupling agent, continuously stirring, and carrying out vacuum drying to obtain the modified yttria-stabilized zirconia ceramic. And filtering, washing, carrying out vacuum drying, adding a binder and deionized water, stirring, standing, carrying out compression molding, carrying out vacuum drying, and calcining. Polyvinyl alcohol is selected as a green binder, the excellent binding characteristic of the polyvinyl alcohol enhances the forming efficiency of the slurry, the slurry is harmless to the environment, polyhydroxy citronellal and carboxymethyl chitosan enhance the modification and uniform dispersion of the stone surface, and then the microstructure of the material is improved. And the environment-friendly dispersing agent and the binder are added, so that the environmental pollution is reduced, and the performance and green ecology are improved.

The invention relates to the technical field of fabrics, in particular to a long-acting anti-mosquito fabric and a preparation process thereof. The fabric overcomes the defect that an existing fabric is difficult to have efficient antibacterial and anti-mosquito performance and excellent washability at the same time. The method comprises the following steps: performing plasma treatment on a fabric to be treated, padding a sol system containing zinc acetate, silver nitrate and the like, and performing heat treatment; preparing a composite microcapsule containing chitosan, citronellal and the like, mixing the composite microcapsule with a bio-based cross-linking agent solution containing cyclodextrin and tannic acid to obtain a finishing liquid, dipping and rolling the primarily treated fabric in the finishing liquid twice, and performing ultraviolet curing and post-treatment to obtain the long-acting anti-mosquito fabric. The surface activity of the fabric is enhanced through plasma treatment, so that the nano coating is firmly attached; the composite microcapsule and the bio-based cross-linking agent solution cooperate to realize slow release and firm combination of mosquito-repelling components; multiple processes are matched to ensure that functional components are stable, and the fabric prepared by the process has efficient antibacterial and anti-mosquito performance and excellent washability, and can still maintain a good protection effect after being washed for multiple times.

The invention belongs to the field of chemical medicine synthesis, and particularly relates to an acylhydrazone compound, a preparation method thereof and application of the acylhydrazone compound in camellia oleifera anthracnose and soft rot. The structure of the acylhydrazone compound is shown as a formula I, and the acylhydrazone compound is directly prepared from citronellal and formylhydrazine through a one-step reaction. The invention provides the acylhydrazone compound, the IC50 of the acylhydrazone compound on liver cancer can reach 7.0 mu M, and a new solution is provided for research and development of drugs for treating liver cancer. The EC50 (mg / L) of the strain can reach 1.65 when the strain is used in an oil-tea camellia anthracnose strain inhibition experiment, the EC50 (mg / L) of the strain can reach 1.38 when the strain is used in an oil-tea camellia soft rot strain inhibition experiment, and a new solution is provided for controlling oil-tea camellia anthracnose and soft rot. Meanwhile, the invention provides a synthesis method of citronellal and formylhydrazine through one-step reaction, and the synthesis method has the advantages of high yield, high raw material conversion rate, high selectivity and the like. And the formula I of the # imgabs0 # is shown in the specification.

The invention relates to the technical field of bacteriostatic agents, in particular to a plant perfume compound microorganism sustained release preparation as well as a preparation method and application thereof. The plant perfume compound microorganism sustained release preparation is prepared from the following raw materials in parts by mass: 2 to 4 parts of clove oil, 6 to 10 parts of citronellal, 1 part of an emulsifier, 2 to 4 parts of chitosan, 2 to 10 parts of sodium alginate, 2 to 6 parts of weathered coal humic acid, 2 to 6 parts of a compound bacterium agent, 10 to 20 parts of charcoal, 2 to 6 parts of amino-terminated polyamidoamine and 0.0002 to 0.0008 part of genipin. Through a triple synergistic mechanism of bacteriostasis of the complex microbial inoculant, slow release of plant active ingredients and rhizosphere micro-ecological regulation and control, the bottleneck that a single biotechnology is low in control effect and short in lasting effect is broken through, compared with chemical control, the cost is greatly reduced, and the method is suitable for an organic pineapple planting system and has remarkable economic and ecological benefits.

The application provides an olefin bond reductase and a mutant thereof and application, and belongs to the technical field of catalysis and modification of functional enzyme molecules. The amino acid sequence of the olefin bond reductase disclosed by the application is shown as SEQ ID NO:1, and the amino acid sequence of the mutant thereof is shown as SEQ ID NO:3. The olefin bond reductase and the mutant thereof provided by the application are used in combination with glucose dehydrogenase to catalyze citral, without adding coenzyme NADH in a reaction system, while glucose salt is produced as a by-product, the economic benefit of the reaction is improved, the cost of the reaction is greatly reduced, and the olefin bond reductase and the mutant thereof have more potential and value in industrial production in the preparation of (R)-citronellal.

The application provides an island reef coral filler compaction pile and a construction method thereof. The construction method of the island reef coral filler compaction pile comprises the following steps: (1) using a weight to hammer the ground soil body to form a cylindrical hole; (2) first filling mixed sand and stone into the hole, the mixed sand and stone is composed of coral reef gravel and calcareous sand, then pouring a microbial curing liquid and a composite additive, the microbial curing liquid is composed of a composite bacterial liquid and seawater, the composite bacterial liquid is prepared from bacillus pasteurii, bacillus cereus and bacillus mucilaginosus, and the composite additive is composed of hydroxyl citronellal and eucalyptol; then using the weight to ram the filler; (3) repeating step (2) to ram and fill the pile hole to the ground to form the compaction pile. The construction method can significantly improve the quality of the compaction pile, significantly improve the single pile bearing capacity, and effectively reduce the relative usage amount of the microbial curing liquid.

The invention relates to a mixture of essential oils comprising, relative to the total volume of the essential oil mixture, 2 to 35% by volume of citronellal; and 2 to 35% by volume of menthol. The invention also relates to the use of this mixture of essential oils in plant protection compositions for the pesticide treatment of plants, particularly for the control of aphids. No figure.

The invention provides a method for preparing optically active citronellal, which comprises the following steps: carrying out asymmetric hydrogenation on neral or geranial to prepare optically active R-citronellal, and a catalyst comprises transition metal rhodium, a diphosphine ligand and weakly alkaline anion exchange resin. According to the method, a certain amount of methane gas is introduced in the catalyst prefabrication process, the methane content is controlled to be 1000-3000 ppm of the total gas content, the catalytic stability of the asymmetric hydrogenation optically active transition metal catalyst for homogeneous catalysis is remarkably improved, R-citronellal with high optical purity is obtained, meanwhile, the catalyst application process is simplified, and the cost is reduced. And remarkable economic benefits are achieved.

The invention belongs to the technical field of organic synthesis, and particularly discloses a modified ChiraPhos type diphosphine ligand and a preparation method and application thereof.The modified ChiraPhos type diphosphine ligand is modified on the basis of a ChiraPhos ligand, naphthyl is introduced into the structure, the chiral recognition effect of a catalyst formed by the naphthyl and rhodium is better, and the catalytic activity of the catalyst is improved. A higher ee value can be induced to be generated in synthesis of an L-menthol key intermediate (R)-citronellal. The invention further provides a specific preparation method of the modified ChiraPhos type diphosphine ligand, and the modified ChiraPhos type diphosphine ligand is obtained from cheap and easily available raw materials through simple and convenient operation. The diphosphine ligand is used for a reaction for preparing (R)-citronellal through asymmetric hydrogenation of citral under rhodium catalysis, the (R)-citronellal with the ee value higher than that of a traditional rhodium catalysis system can be obtained through citral (E / Z = 90: 10) with cis-trans isomers mixed, and a certain foundation is laid for further reducing the industrial production cost of the (R)-citronellal.

Proposed is a perfume composition comprising or consisting of (a) nerolaldehyde; (b) geranial; (c) capraldehyde; (d) dodecanal; (e) citronellal; and optionally (f) at least one solvent, in particular as an orange oil substitute.

The invention relates to a microbial compound feed additive for grass carps and a preparation method, and belongs to the technical field of feed additives. The preparation method comprises the following steps: mixing oil tea meal and moringa seed meal, crushing, sieving, carrying out ultraviolet sterilization, adding deionized water, stirring and mixing, adding a complex microbial inoculant, mixing, fermenting, sterilizing, carrying out freeze drying, adding an ethanol solution and glutamic acid, mixing, and carrying out freeze drying to obtain the microbial compound feed additive for grass carps. Adding a composite cross-linking agent, heating and stirring, centrifuging to remove supernate, washing, drying in vacuum, ultrasonically mixing with a chitosan oligosaccharide solution, adding a catalyst, heating, centrifuging, and freeze-drying to obtain the chitosan oligosaccharide. The camellia oleifera meal and the moringa seed meal are fermented through the microbial inoculum, the content of polyphenol, polypeptide and other antioxidant substances in a fermentation product is increased, and the stability and oxidation resistance of the feed additive are remarkably improved by combining organic coating modification of glutamic acid, protocatechualdehyde, citronellal and chitosan oligosaccharide.

The invention discloses a pungent litse fruit essence for beverage and a preparation method thereof, and belongs to the technical field of beverage additives, the pungent litse fruit essence is prepared from the following raw materials in parts by mass: 0.1 part of citronellal, 0.1 part of linalool, 0.05 part of geraniol, 0.1 part of citral, 3 parts of lemon terpenoid removal liquid, 10 parts of pungent litse fruit water-soluble extract, 5 parts of pungent litse fruit fermentation extract, 61.65 parts of ethanol, 10 parts of purified water and 10 parts of propylene glycol. The citronellal, the linalool, the geraniol and the citral are used for providing head fragrance, the lemon terpene-removing liquid is used for providing soft fragrance, the pungent litse fruit water-soluble extract is used for providing main fragrance, the pungent litse fruit fermentation extract is used for providing composite fragrance, so that the fragrance of the pungent litse fruit essence is compounded and rich, and meanwhile, the pungent litse fruit extract is obtained by an ethanol water extraction method, has good water solubility, and can be used for preparing the pungent litse fruit essence. The beverage can be applied to beverages and has unique flavor.

The invention discloses a catalyst for preparing citronellal by selective reduction of citral and a preparation method thereof. A magnesium oxide carrier is obtained by calcining a magnesium salt at high temperature, a palladium precursor is uniformly loaded on magnesium oxide by adsorption, palladium is reduced with sodium borohydride, potassium borohydride or sodium formate, and then a hydrophobic hydrogenation catalyst is obtained by modification with 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane. The catalyst prepared in this way has high catalytic activity and selectivity for the reaction of preparing citronellal by selective reduction of citral. The catalyst active components of the present invention are highly dispersed, highly active, and have a selectivity of ≥98%, and the catalyst cost is low, and has a high industrial application value.

The present invention discloses a fruit juice beverage for reducing blood sugar and increasing sweetness by using sweet orange aroma substances and a preparation method thereof. The fruit juice beverage contains linalool at a mass percentage of 0.05% - 0.3%, geraniol at a mass percentage of 0.025% - 0.3%, limonene at a mass percentage of 0.025% - 0.3%, neral at a mass percentage of 0.025% - 0.3%, citronellal at a mass percentage of 0.025% - 0.3%, octanal at a mass percentage of 0.025% - 0.3%, citral at a mass percentage of 0.025% - 0.3%, caryophyllene at a mass percentage of 0.01% - 0.3%, and sucrose at a mass percentage of 1% - 10%. By studying the interaction between eight spices such as limonene, linalool, neral, geraniol, octanal, citral, caryophyllene, and citronellal and sucrose, the present invention controls the concentrations of the spice substances and sucrose in the beverage, achieving the effect of reducing blood sugar and increasing sweetness. Compared with the prior art, the spices used in the present invention are natural and healthy, and the prepared beverage has a moderate sweetness and high comfort level.

The invention provides a method for preparing citronellal. By controlling the ratio of cis-iso-isodecadienal to trans-iso-isodecadienal in the citral raw material to be 3: 2-4: 2 and the content to be 0.2-0.5 wt%, the ee value of citronellal can be effectively increased, and the generation of excessive hydrogenation products is reduced, so that the yield of citronellal is increased.

The present invention relates to the technical field of antibacterial agents, and more particularly to a plant-flavored composite microbial sustained-release preparation, a preparation method, and an application thereof. The raw materials of the plant-flavored composite microbial sustained-release preparation include, by mass, 2-4 parts of clove oil, 6-10 parts of citronellal, 1 part of emulsifier, 2-4 parts of chitosan, 2-10 parts of sodium alginate, 2-6 parts of weathered coal humic acid, 2-6 parts of composite bacterial agent, 10-20 parts of biochar, 2-6 parts of amino-terminated polyamidoamine, and 0.0002-0.0008 parts of genipin. The present invention achieves a triple synergistic mechanism through the inhibition of bacteriostasis by composite bacterial agent, sustained release of plant active ingredients, and regulation of rhizosphere microecology, thereby breaking through the bottleneck of low prevention efficiency and short lasting effect of single biotechnology, significantly reducing the cost of chemical control, being suitable for organic pineapple planting systems, and having significant economic and ecological benefits.

To provide a beer taste beverage which has enhanced ester feeling like beer, a method for producing a beer taste beverage, and a flavor improvement method for a beer taste beverage.SOLUTION: A beer taste beverage according to an embodiment has a content of geraniol of 10-200 ppb, and a content of citronellal of 0.3-600.0 ppb, in which when the content of the geraniol is set at X ppb and the content of the citronellal is set at Y ppb, Y / X is 0.07-15.00, the alcohol concentration is 3-8% and the malt ratio is 50% or more (excluding those containing lemongrass).SELECTED DRAWING: None

The invention relates to a hydrogenation catalyst for citronellol preparation as well as a preparation method and application thereof. The hydrogenation catalyst comprises a carbon carrier and metal loaded on the carbon carrier, the preparation method of the carbon carrier comprises the following steps: mixing biomass, a pore-enlarging agent and water, and sequentially performing freeze drying and calcination to obtain the carbon carrier. The hydrogenation catalyst provided by the invention can be used for preparing citronellol, and can solve the problems that front distillate citronellal, geraniol, nerol and a mixture of citronellal, geraniol, nerol and citronellol generated by refining a crude product are difficult to treat, low in additional value, high in energy consumption and the like in a process for preparing geraniol from geranilal; and the hydrogenation catalyst has the advantages of high conversion rate, high citronellol selectivity, simple post-treatment, low cost and high safety coefficient.

The invention discloses a method for separating and preparing (R)-citronellal and co-producing (S)-citronellal, which takes raw materials containing (R)-citronellal and (S)-citronellal as substrates and carbonyl reductase and formate dehydrogenase as catalysts. According to the invention, co-production of (R)-citronellal and (S)-citronellal can be realized, and the (R)-citronellal and (S)-citronellal can be applied to the field of spices,

The invention relates to a composite biological preparation for aphid control and a preparation method thereof, and belongs to the technical field of biological control, the composite biological preparation comprises the following raw materials by weight: 10%-12% of tea saponin, 10%-13% of rotenone, 11%-14% of citronellal, 10%-15% of tea polyphenol, 12%-15% of castor extract, 10%-12% of white mustard seed oil, 3%-5% of garlic oil, 2%-4% of lauric aldehyde, 7%-9% of peppermint oil, and the balance of 95% alcohol. According to the preparation disclosed by the invention, through a multi-target synergistic effect, aphid mouthparts are out of order, action ability is lost, breeding is stopped and the symbiotic relationship of ants is blocked, so that omnibearing aphid prevention and control are realized, and the prevention and control efficiency reaches 90% or above.

The invention relates to the technical field of cucurbit bubble films, and discloses a multilayer biodegradable cucurbit bubble film and a preparation process thereof. The preparation process comprises the following steps: preparing a long alkyl chain type coupling agent by taking citronellal as a raw material; the long alkyl chain type connecting agent is a non-o-nitrobenzyl ester functionalized long alkyl chain type connecting agent or an o-nitrobenzyl ester functionalized long alkyl chain type connecting agent; based on an esterification reaction mechanism, the molecular structure of amylopectin is modified through a long alkyl chain type connecting agent to obtain alkenylated amylopectin; on the basis of a free radical coupling reaction mechanism, alkenyl amylopectin is bridged on a polyethylene molecular chain to prepare the biodegradable polyethylene material. The multilayer biodegradable cucurbit bubble film is prepared from a biodegradable polyethylene material and other auxiliaries through extrusion blow molding, casting blister and film layer compounding processes, the film product also has photodegradation capacity on the basis of excellent biodegradation capacity, the comprehensive performance can meet the actual use requirement, and the film product has actual application value.

The application relates to the technical field of daily chemicals, and particularly discloses a bacteriostatic and deodorizing fragrance composition as well as a preparation method and application thereof. The bacteriostatic and deodorizing fragrance composition is made of raw materials and comprises the following components: a chemical reaction type deodorizing fragrance base, a sensory modification and receptor blocking fragrance base and a bacteriostatic synergistic fragrance base. The chemical reaction type deodorizing fragrance base is a combination of one or more of citral, citronellal, decanal, damascone, ionone and methyl dihydrojasmonate; the sensory modification and receptor blocking fragrance base is a combination of one or more of menthol and its derivatives, linalyl acetate, dihydromyrcenol and eucalyptol; and the bacteriostatic synergistic fragrance base is a combination of one or more of farnesol, eugenol, thymol, tea tree oil and rosemary extract. The bacteriostatic and deodorizing fragrance composition can keep a better balance and coordination of the sensory modification, chemical deodorization and bacteriostatic components in the fragrance, and thus can exert excellent deodorization and bacteriostatic effects.

This invention discloses a method for preparing optically active citronellol, comprising the following steps: preparing optically active R-citronellol by asymmetric hydrogenation of neraldehyde and / or geranialdehyde in the presence of a catalyst, wherein the catalyst comprises a transition metal rhodium and a bisphosphine ligand, wherein the mass of isopentenol in the raw material neraldehyde or geranialdehyde is 100-500 ppm of the mass of neraldehyde or geranialdehyde, and the mass of 3,7-dimethyl-2,6-octadienoic acid is 500-1000 ppm of the mass of neraldehyde or geranialdehyde; the preparation method of this invention can significantly improve the catalytic stability of optically active transition metal catalysts used for homogeneous catalysis and asymmetric hydrogenation, yielding R-citronellol with high optical purity, while simplifying the process flow, avoiding the introduction of new impurities, and exhibiting significant economic benefits.

The invention discloses a brown sugar and preserved plum essence composition special for areca nut products and a preparation method thereof, and the brown sugar and preserved plum essence composition is composed of 10-20 parts of brown sugar base, 8-15 parts of preserved plum base, 3-8 parts of sweetening agent, 2-5 parts of acidulant, 40-60 parts of edible alcohol and 1-3 parts of stabilizer. The brown sugar base is composed of caramel aldehyde, citronellal, maltol, ethyl maltol and edible salt according to the weight ratio of (1-3): (0.5-1.5): (0.3-1): (0.2-0.8): (0.1-0.5), and the preserved plum base is composed of phenylacetaldehyde, ionone, heptanoic acid, benzyl acetate and lactones according to the weight ratio of (1-3): (0.5-1.5): (0.5-1.5): (0.2-0.6): (0.1-0.5). The brown sugar preserved plum essence composition disclosed by the invention is excellent in aroma richness, aroma retention time, taste harmony and stability.

The application provides a method and a process system for continuously producing citronellal from citral. The method comprises the following steps: introducing hydrogen into citral to produce citronellal under the catalysis of a catalyst; wherein the hydrogen introduced in the hydrogenation reaction contains 100-600 ppm of activating gas; and the activating gas is selected from NO or NO2. The method and device for continuously producing citronellal from citral provided by the application overcome the shortcoming that noble metal catalysts in aldehyde systems are easily poisoned by CO generated by aldehyde decomposition, realize online activation of the catalyst, and realize circulation and reuse of the catalyst in the reactor.

The invention discloses a hydrogenated citral catalyst which is characterized in that the molecular formula of the hydrogenated citral catalyst is Ni-Y / bentonite, an active component nickel ion (Ni) and a transition metal ion (Y) are loaded in a bentonite carrier, the loading capacity of the nickel ion is 20-30%, and the loading capacity of the transition metal ion is 5-12%; the transition metal ions (Y) are iron ions. The method can be used for simultaneously preparing a large number of catalysts, the catalyst preparation time is greatly shortened, no organic solvent is used and generated in the process, and environmental friendliness is facilitated; the Ni-Y / bentonite catalyst prepared by the invention is a powdery solid, is suitable for heterogeneous catalytic citral hydrogenation, and has high catalytic efficiency, the conversion rate of citral reaches 82.8%, and the selectivity of citronellal reaches 100%.

The application provides a method for efficiently preparing R-citronellal from citral. The method comprises two steps of pretreating raw material citral and catalytically preparing R-citronellal through asymmetric hydrogenation of citral. The method can greatly improve S / C (substrate / catalyst) of the reaction of preparing R-citronellal through asymmetric hydrogenation of citral, thereby significantly improving production efficiency and economic benefits.

The invention discloses olefinic bond reductase and application thereof. The amino acid sequence of the olefinic bond reductase mutant disclosed by the invention is as shown in SEQ ID NO: 4. The olefinic bond reductase mutant provided by the invention has preference to nerolaldehyde, and a double-plasmid co-transformation strain constructed by the olefinic bond reductase mutant and glucose dehydrogenase not only has more preference to a nerolaldehyde substrate, but also can transform the substrate (E / Z)-citral into (R)-citronellal with higher transformation efficiency; and the method has good potential economic benefits and industrial application values.

The invention provides radioisotope carbon-14 labeled methoprene and a preparation method thereof, and the preparation method comprises the following steps: S1, preparing [cyano-14C] (R)-7-methoxy-3, 7-dimethyl octanenitrile; s2, preparing [aldehyde-14C] citronellal; and S3, preparing the carbon-14 labeled methoprene. The related field blank of radioisotope carbon-14 labeled methoprene is filled, accurate and reliable tracing information can be provided when behaviors of methoprene in organisms and environments are researched, a powerful tool is provided for deeply exploring the metabolic process, environmental behaviors, pharmacokinetics and the like of methoprene, and the method has the advantages of being high in practicability and wide in application prospect. And the development of research in related fields is promoted, such as optimization of the use strategy of methoprene in agricultural pest control.

This invention relates to the field of polymer materials technology, and discloses a light-triggered sustained-release polyamide masterbatch for antibacterial and mosquito-repellent traditional Chinese medicine, its preparation method, and applications. The masterbatch comprises a polyamide matrix and traditional Chinese medicine composite microcapsules and hindered amine light stabilizers uniformly dispersed in the polyamide matrix. The traditional Chinese medicine composite microcapsules are core-shell structures, with the core containing Artemisia argyi oil, citronellal, and eugenol, and the capsule wall being a polyamide material. The hindered amine light stabilizers are uniformly distributed in the polyamide matrix and / or capsule wall. This invention utilizes the photosensitivity of the light stabilizer to achieve on-demand release of traditional Chinese medicine components under ultraviolet light irradiation. Simultaneously, specific HALS (Hindered Amines and Hindered Amines) have a synergistic antibacterial effect with the traditional Chinese medicine components, resulting in a long-lasting, efficient, and safe antibacterial and mosquito-repellent effect. It is suitable for various applications such as fibers, non-woven fabrics, films, and injection molded parts. Using natural traditional Chinese medicine extracts as the main active ingredients, it is more environmentally friendly and has higher safety for humans and the environment.