29 results about "Citronellal" patented technology

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 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.

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 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 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 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 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.

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.

Provided herein is a composition comprising antimicrobial peptide having sequence of SEQ ID 1 and a natural active such that the composition provides 5 log reduction of bacteria in 1 minute. In the said composition the natural active is selected from medium chain fatty acid (6 to 12 carbon atoms) and selective essential oil like eugenol and citronellal from clove oil and citronella oil respectively.

This invention relates to the field of functional textile technology, and discloses a method for preparing a light-triggered, sustained-release traditional Chinese medicine antibacterial and mosquito-repellent outdoor textile for outdoor environments, as well as the resulting product. The preparation method involves: providing a light-triggered, sustained-release traditional Chinese medicine antibacterial and mosquito-repellent polyamide masterbatch, which consists of a polyamide matrix, uniformly dispersed traditional Chinese medicine composite microcapsules, and hindered amine light stabilizers. The core of the microcapsules contains Artemisia argyi oil, citronellal, and eugenol. The masterbatch is blended with the polyamide matrix, spun, and woven to obtain a grey fabric. The grey fabric is then subjected to ultraviolet light activation treatment to form an initial antibacterial and mosquito-repellent active layer. Finally, the outdoor textile is obtained through finishing. This invention utilizes the photosensitivity of hindered amine light stabilizers to achieve on-demand release triggered by ultraviolet light. The resulting textile exhibits antibacterial and mosquito-repellent effects, retaining ≥80% of its function after 20 washes. It is suitable for outdoor products such as tents, outdoor clothing, and sleeping bags, and has outstanding advantages such as long-lasting effectiveness, environmental safety, and ease of use.

The invention belongs to the technical field of daily necessities, and provides a solid mosquito repellent product and a preparation method thereof. The solid mosquito repellent product comprises an essence base, a curing agent, an anti-cracking agent, a thickening agent, an emulsifying agent and a preservative, and the specific types and mass parts of all the components are limited. According to the invention, an essence base compounded by 2-undecanone and citronellal is adopted, and a sodium stearate-beeswax composite curing agent system and a carrageenan-xanthan gum double-thickening system are combined in a golden proportion, so that the volatilization rate is accurately regulated and controlled, and the mosquito repelling duration is as long as 15-60 days; through the synergistic effect of the emulsifier Tween 80 and the anti-cracking agent, nanoscale slow-release particles are formed, and uniform diffusion of mosquito-repelling components is ensured; an essence base compounded by citronellal, citronellol and peppermint oil can cover the slight grease flavor of 2-undecanone; the mosquito repelling effect is remarkable, the repelling rate of aedes albopictus reaches 98.2%, and the mosquito repellent is non-toxic, safe, pleasant in smell and free of skin irritation.

The present invention provides a method for utilizing pure essential oils from citronella to formulate mosquito repellent spray. Citronella contains citronellal, citronellol, and geraniol, that provide its aroma and mosquito-repellent ability. The method involved washing the citronella grass to remove impurities. Air dying extracting the raw materials at room temperature to remove moisture. The leaves are then subjected to leaching processes in which they are soaked in 500 mL of hexane overnight to ensure efficient and pure essential oil extraction. Recover the hexane through distillation using a Soxhlet apparatus, leaving behind the pure essential oil to achieve a natural, eco-friendly, cost-effective and sustainable mosquito-repellent spray.

The invention provides a method for preparing citronellal with optical activity, which is characterized in that a nitrogen-doped carbon material is used as a catalyst, a bicyclo-oxazole compound is used as a cocatalyst, citral is used as a raw material, and asymmetric hydrogenation reaction is carried out to prepare the citronellal with optical activity. The method provided by the invention realizes asymmetric hydrogenation of alpha, beta-unsaturated aldehyde under the condition of higher substrate / catalyst, and the optical purity of the asymmetric hydrogenation product can reach about 85-99ee%; the chemical selectivity of the asymmetric hydrogenation product can reach 95-99%, and the conversion rate can reach 85-99.9%.

The invention belongs to the technical field of biosynthesis, and particularly relates to a method for catalytically synthesizing R-citronellal based on a double-enzyme system. According to the method for catalytically synthesizing the R-citronellal through the double-enzyme system, one-step series conversion from geraniol to the R-citronellal can be realized through the synergistic effect of the double-enzyme system of the copper oxidase and the old yellow enzyme, especially by matching with a proper coenzyme system and a metal salt system, so that the reaction efficiency and the enantioselectivity of a product are greatly improved, and the yield of the R-citronellal is increased. The method is a high-efficiency and high-selectivity synthesis system for synthesizing R-citronellal under the catalysis of a double-enzyme system.

The invention is a composition for the treatment of HPV infections, which, with its components containing [3-caryophyllene, geranyl acetate, geraniol, and nerol, modulates the E7 and E2 protein pathways to provide a natural supportive therapeutic effect in managing HPV infections, exhibits antiviral, antibacterial, and immunomodulatory activity, significantly reduces viral replication, and suppresses protein expression, Contains Eugenia aromaticum (clove oil), which prevents viral replication by disrupting the structural integrity of cell membranes, exhibiting antimicrobial and antiviral activity with its high eugenol content, and Contains Cymbopogon martinii (palmarosa oil), which disrupts viral cell walls and inhibits the replication process, exhibiting antiviral and antibacterial properties with its high geraniol and citronellal content, and Contains Melaleuca viridiflora (niaouli oil), which strengthens cellular immune mechanisms to limit the intracellular spread of viruses and exhibits antiviral and immunomodulatory effects with its viridiflorol content.

The invention discloses a hygienic product packaging bag with an anti-mosquito function, and belongs to the field of hygienic product packaging bags, the hygienic product packaging bag comprises a bag body, an anti-mosquito functional layer is arranged on the bag body, anti-mosquito particles are arranged in the anti-mosquito functional layer, and the anti-mosquito particles are formed by embedding and loading anti-mosquito active ingredients in a sustained-release material. The slow-release material comprises beta-cyclodextrin, chitosan, glycerol and deionized water, the anti-mosquito active component comprises citronellal, lemon cineole, eugenol, menthol, a folium artemisiae argyi extract, toosendanin and a cosolvent, and the anti-mosquito component adopts multiple plant essential oils or plant extracts. The mosquito-repellent incense can protect mosquitoes from the smell, nervous system, feeling, ingestion, breeding interference and other aspects, the protection effect is guaranteed, the components are all plant essential oil or plant extracts, components uncomfortable to the human body do not exist, products such as private parts, babies and pregnant women can be conveniently packaged and used, and the mosquito-repellent incense is convenient to use. And the arrangement mode that particles are formed through embedding or loading and added to the packaging layer is adopted, so that lasting and comprehensive packaging protection can be ensured.

The invention belongs to the field of super-hydrophobic coatings, and particularly relates to a citronellyl polymer, a strong adhesion type citronellyl super-hydrophobic coating and a preparation method of the strong adhesion type citronellyl super-hydrophobic coating. According to the preparation method, firstly, citronellol is converted into citronellyl norbornene formate or citronellyl acid is converted into citronellyl acid norbornene methyl ester, then, a low-surface-energy citronellyl polymer is generated through ring-opening polymerization reaction, and further, a micro-nano structure is introduced, so that the required bio-based super-hydrophobic coating is obtained. The citronella-based polymer adopted in the strong-adhesion type super-hydrophobic coating has a flexible citronella side chain, so that the adhesion between the coating and a substrate can be promoted; ester bonds in side chains are easy to form physical bonding with a substrate, so that the interface adhesive force can be enhanced; and the cyclic structure in the polymer main chain can effectively improve the cohesive force of the coating. The three components cooperate to bring excellent adhesiveness and mechanical durability to the super-hydrophobic coating.

The present application belongs to the field of asphalt, and particularly relates to an environment-friendly asphalt modifier and a preparation method and application thereof. The environment-friendly asphalt modifier provided by the present application comprises: 20-65% of a dispersing agent; 15-40% of an antioxidant; and 15-40% of an odor reagent, wherein the odor reagent comprises one or more of limonene, pinene, isopinene, phellandrene, alpha-terpinene, pinene, sylvestrene, myrcenol, myrtenyl alcohol, verbenyl alcohol, citral, citronellal, hydroxy-citronellal, osthole, perilene, menthone, carvone, dihydrocarvone, piperitone, camphor, methyl nonyl acetaldehyde, isopentenyl aldehyde, para-cymene, ethyl cinnamic aldehyde, alpha-hexyl cinnamic aldehyde, 9-decenal, 2-tridecenal and hexadecenal. The asphalt modifier provided by the present application can significantly improve the aging resistance of asphalt during mixing and construction, and significantly reduce the emission of harmful pollutants.

The invention relates to the field of daily chemical essence, in particular to a citrus aurantium flower essence base, a daily chemical product and perfume. The essence base is prepared from the following components in percentage by mass: a first note component and a second note component, a second note component; a third note and a fixed note component; a solvent; the sum of the mass percentages of the components is 100%. Wherein the first note component is prepared from trans-2-hexenal, limonene, leaf acetate, citronellal, alpha terpilenol and citral; the second note component is prepared from linalool, nerol, geraniol, neryl acetate, indole, methyl anthranilate and aryl jasmonone; the third note and fragrance fixing component comprises anisyl acetone, nerolidol, benzyl salicylate and benzyl benzoate. According to the citrus aurantium flower fragrance base, high simulation and hierarchical reproduction of natural citrus aurantium flower fragrance are achieved, meanwhile, excellent batch stability and fragrance persistence are achieved, and the cost is remarkably lower than that of a scheme depending on natural essential oil.

The invention provides a spice composition with litchi fruit fragrance and peony flower fragrance and application of the spice composition. The perfume composition is prepared from the following components: 0.05 to 0.1 weight percent of berry ethyl ester, 2.0 to 3.0 weight percent of tropical fruit fragrance base, 1.0 to 2.0 weight percent of bitter orange essential oil, 3.0 to 5.0 weight percent of phenethyl alcohol, 0.05 to 0.1 weight percent of hydroxycitronellal, 0.05 to 0.1 weight percent of alpha-ionone, 5.0 to 10.0 weight percent of seven-flower lotus fragrance base, 5.0 to 10.0 weight percent of methyl dihydrojasmonate and the balance of water. And the balance of auxiliary spices and / or dispersants and / or stabilizers. The spice composition disclosed by the invention can present a fresh and sweet litchi fragrance front tone and a clear and full peony fragrance middle tone, and can be used for daily chemical products to meet the technical requirements on high-grade fragrance expression.

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

The invention discloses a broad-spectrum tobacco storage pest repellent and a preparation method thereof, and belongs to the field of plant protection and agricultural product postpartum treatment.The repellent is formed by compounding citronellal, trans-anethole (the main active ingredient of star anise oil) and methyl salicylate (the main active ingredient of wintergreen oil) serving as core active ingredients with a solvent, a stabilizer and an auxiliary. Through scientific proportioning, a remarkable synergistic effect is generated, and the pesticide has extremely strong repelling and oviposition inhibition effects on adults of the two pests; the product is good in environmental compatibility, safe to human bodies, free of chemical residues and free of adverse effects on tobacco quality, the repellent rate is larger than 95%, the lasting period can reach 30 days or above, the problems of chemical agent residues, drug resistance, narrow single-component repellent spectrum and poor effect are effectively solved, and the composition is suitable for various tobacco storage environments.

The invention discloses a directional synthesis preparation process of (1R)-(-)-trans-menthanediol, which comprises the following steps: dissolving p-toluenesulfonic acid in water to prepare a p-toluenesulfonic acid solution; the preparation method comprises the following steps: adding isopulegol into a p-toluenesulfonic acid solution, and carrying out heating reaction for 2-6 hours at the temperature of 65-90 DEG C to prepare a reaction mixture containing (1R)-(-)-trans-menthanediol; cooling the reaction mixture, and separating to obtain an organic phase; carrying out crystallization separation on the organic phase under a low-temperature condition to obtain a solid product, and then washing and drying the solid product to obtain a target product (1R)-(-)-trans-menthanediol; according to the method, the isopulegol is used as a synthesis raw material, the acid catalysis hydration reaction is carried out under the catalytic action of the p-toluenesulfonic acid, and high-efficiency and large-scale preparation of a target configuration can be realized without using high-cost chiral raw materials such as enantiomer pure citronellal, so that the large-scale production requirement of the (1R)-(-)-trans-menthanediol is met.

The invention relates to herbal essential oil incense which comprises the following components in percentage by mass: 85% of citronellal oil, 10% of lemon essential oil, 4% of neroli oil and 1% of jasmine oil. The brand-new herbal essential oil aromatherapy is pure natural plant essential oil, is fragrant and soft in smell, does not contain irritant chemical smell, has the effects of repelling mosquitoes, deodorizing, soothing the nerves and soothing the heart, does not contain alcohol, and also has good volatility.

The invention discloses a preparation method of an antibacterial and anti-mite fabric for towels. The preparation method comprises the following steps: preparing a cationic antibacterial polymer solution; preparing modified kaolin loaded with citronellal; preparing a composite finishing liquid containing a titanium precursor, antibacterial macromolecules and loaded kaolin; preparing a seal liquid with an amphoteric structure and a hydrophobic chain segment; sequentially carrying out pretreatment, first-time dipping, second-time dipping, third-time dipping and last-time dipping on the cotton base cloth. Through a multi-step ordered impregnation process, a'cationic antibacterial polymer / photocatalyst / fiber active group 'ternary synergistic gradient composite structure is constructed on the surface of the fiber, and the obtained fabric has efficient and lasting antibacterial and anti-mite performance, excellent fastness to washing, good soft hand feeling and low skin irritation; the fabric is especially suitable for infants and household textiles with high sanitary requirements.