67 results about "Hexaldehyde" patented technology

Disclosed is a process for the production of higher aldehydes from lower alcohols using a two-stage vapor phase heterogeneous catalyst system. Ethanol feeds afford aldehydes such as butyraldehyde and crotonaldehyde while butanol feeds yield 2-ethylhexanal and 2-ethylhexenal. Higher product selectivities are obtained when the alcohol is first dehydrogenated in the upper catalyst stage followed by aldol condensation of the resulting lower aldehyde to a higher aldehyde.

The invention relates to a pulping method. The method comprises a coarse crushing stage, a heating and beany flavor generating stage, fine crushing stage and cooking stage, wherein in the coarse crushing stage, the liquid temperature T1 is less than or equal to 70 DEG C; preferably, a dipping stage is set before the coarse crushing stage, and the weight ratio X of the water amount to dry beans in the dipping stage is more than or equal to 2.5; preferably, the heating and beany flavor generating stage comprises a first heating stage and a second heating stage, and the liquid temperature in the first heating stage slowly rises to 75 DEG C; by setting the coarse crushing stage and controlling the liquid temperature in the coarse crushing stage to be lower than 70 DEG C, proper reaction temperature is provided for lipoxidase and unsaturated fatty acid which are released to the pulp, so that hexaldehyde is generated as much as possible and the soybean milk contains rich beany flavor; and by setting the dipping stage before the coarse crushing stage, the pulping materials can be easily crushed.

A fragrant compound or fragrant composition stable for a long period of time in an acidic hard article surface cleaning liquid adjusted so as to be acidic, particularly to pH 2.0 to 3.0 with an organic acid. One or more of fragrant compounds selected from the group consisting of 2,6-dimethyl-2-heptanol, 3,3-dimethylcyclohexyl methyl ketone, o-tert-butylcyclohexanol, α-amylcinnamic aldehyde, α-damascone, γ-octalactone, γ-nonalactone, γ-decalactone, anethole, ethyl benzoate, ethyl 2,2,6-trimethylcyclohexanecarboxylate, 2,2,6-trimethyl-1-crotonylcyclohexane, 6-acetyl-1,1,2,4,4,7-hexamethyltetrahydronaphthalene, isoamyl phenylethyl ether, methyl octin carbonate, 6,7-dihydro-1,1,2,3,3-pentamethyl-4(5H)-indanone, tricyclodecenyl acetate, undecyl aldehyde, fenchyl acetate, dihydrojasmone, cedryl methyl ether, p-cresol, hexyl aldehyde, and rosephenone are stable.

The invention provides a novel compound for detecting hexanal exhaled by a lung cancer patient and a preparation method thereof. The structural formula is represented as follows. The compound is called as bis-[5-(4-carbonyl phenyl)-10, 15, 20-triphenyl porphyrin]-1, 2-phthalimide. The compound is obtained by removing two molecules of water from 5-p-carboxyphenyl-10, 15, 20-triphenyl porphyrin and o-phenylenediamine; carboxyl porphyrin with excellent photoelectric properties and the o-phenylenediamine are subjected to condensation reaction to form a molecular tweezer compound with specific cavity sizes; and the compound can be further developed into a sensitive material for visual breath detection of the lung cancer patient. By means of the novel compound, breathing diagnosis of diseases can be performed, and problems that convention diagnosis methods of lung cancers are complicated, time-consuming and expensive and can cause damages to the patient are solved.

The invention relates to a method for removing hexaldehyde and 2-heptanone in cyclohexanone. As a traditional technology for producing chemical fibre level cyclohexanone of caprolactam has the problems of high energy consumption and high material consumption, the invention discloses a method; the method comprises the following steps of: using solid adsorben to remove hexanal and 2-heptanone impurities from solvent-based cyclohexanone; controlling the content of the two in the cyclohexanone to be lower than 40mg / kg, and using supercritical gas carbon dioxide to desorb the adsorbate, so that the absorption and the desorption can be continuously on-line. The method has the characteristics of low energy consumption and low material consumption.

The invention discloses specific molecular markers for aspergillus flavus infection mildew of corns, peanuts and walnuts. The specific molecular markers for aspergillus flavus infection mildew of corns comprise ethyl acetate-D, and 3-hydroxybutane-2-ketone-D; the specific molecular markers for aspergillus flavus infection mildew of peanuts comprise caproic acid, 2.3-butanedione, 2-hexyl-1-alcohol-M, pentane-1-alcohol-M and hexaldehyde; and specific molecular markers for aspergillus flavus infection mildew of the walnuts comprise ethyl acetate-D, and 3-methyl-2-butyl alcohol. The method for carrying out early-stage mildew detection by utilizing the specific molecular markers for aspergillus flavus infection mildew of the corns, the peanuts and the walnuts comprises the following steps: establishing a complete GC-IMS database of the corn, the peanut and the walnut, and analyzing to obtain the specific molecular markers for aspergillus flavus infection mildew of the corn, the peanut and the walnut; and extracting corn, peanut and walnut stock samples, carrying out GC-IMS technical detection to obtain GC-IMS data of the stock samples, analyzing whether the specific molecular markers for aspergillus flavus infection mildew exist in the GC-IMS data, and judging whether the stock samples have early mildew or not.

The invention discloses a lure agent for luring locusts and a lure prepared from the same and an application of the lure agent and the lure, and belongs to the technical field of pest control. The lure agent is prepared from hexaldehyde, cis-3-hexenol, benzaldehyde, 2-methyl-2-pentenal, 2-octanone and paraffin oil. The lure for luring locusts is prepared by the following preparation method: takingsolutes hexaldehyde, cis-3-hexenol, benzaldehyde, 2-methyl-2-pentenal and 2-octanone, adding the solutes hexaldehyde, cis-3-hexenol, benzaldehyde, 2-methyl-2-pentenal and 2-octanone into a solvent paraffin oil, and fully dissolving the solutes in the solvent according to the solute concentration of 0.01%-0.1% to obtain a lure agent; and putting a rubber strip into the lure agent at normal temperature, soaking the rubber strip for more than 6 hours, drying the rubber strip in the shade, and sealing the rubber strip with plastic to obtain the lure. The locust lure agent can be used for controlling locust behaviors, preventing and controlling locusts and monitoring the quantity dynamics of the locust population. The chemical compound is derived from a host plant of locusts, so that the chemical compound has no toxic effect on the environment and human, livestock and poultry, is safe to natural enemies, and belongs to a natural pesticide.

The invention discloses a novel integrated solid acid catalyst with a carbon-based structure. The novel integrated solid acid catalyst is a sulfonating carbon nano tube (CNT-SO3H@) stainless steel material and is prepared by using the stainless steel material as a support material, growing a carbon nano tube on the surface of the support material, vulcanizing through polysulfide and oxidizing. The invention simultaneously discloses a preparation method of the novel catalyst and an application in preparation of biodiesel by means of catalytic distillation. The loss of an acid position of the solid acid catalyst with the carbon-based structure is reduced; because of high heat stability and structure stability, the catalyst is easily made into various shapes and is filled into a catalytic distillation tower to be used. An original element having functions of catalyzing and separating is used for coupling a reaction process with a separation process, and because of the process, the complicated processes of pre-esterification, purification and subsequent separation are avoided; meanwhile, a glycerinum product which is used for catalyzing waste oil and methyl alcohol ester to perform exchange reaction is converted into products of glyceraldehydes, glyceric acid, hexanal dimethyl acetal, acraldehyde dimethyl acetal and the like, so that the reaction is greatly intensified; finally, a biodiesel product with high purity can be directly obtained on the top of the tower and at the bottom of the tower.

The invention relates to a pulping method. The method comprises a coarse crushing stage, a heating and beany flavor generating stage, fine crushing stage and cooking stage, wherein in the coarse crushing stage, the liquid temperature T1 is less than or equal to 70 DEG C; preferably, a dipping stage is set before the coarse crushing stage, and the weight ratio X of the water amount to dry beans in the dipping stage is more than or equal to 2.5; preferably, the heating and beany flavor generating stage comprises a first heating stage and a second heating stage, and the liquid temperature in the first heating stage slowly rises to 75 DEG C; by setting the coarse crushing stage and controlling the liquid temperature in the coarse crushing stage to be lower than 70 DEG C, proper reaction temperature is provided for lipoxidase and unsaturated fatty acid which are released to the pulp, so that hexaldehyde is generated as much as possible and the soybean milk contains rich beany flavor; and by setting the dipping stage before the coarse crushing stage, the pulping materials can be easily crushed.

The invention belongs to the field of chemical synthesis, and particularly relates to an industrial synthesis method of a dichocrocis punctiferalis sex pheromone. The method comprises the following steps: taking 1, 10-decanediol as a raw material; carrying out a single-side bromination reaction to prepare 10-bromodecanol; then reacting the 10-bromodecanol with triphenylphosphine to obtain 10-hydroxydecyltriphenylphosphine salt; performing a Wittig reaction with n-hexaldehyde under the action of alkali to obtain cis-based 10-hexadecene-1-ol; performing isomerization on the cis-based enol underthe action of p-methylthiophenol to obtain trans-based 10-hexadecene-1-ol; and finally performing oxidation under the action of an oxidant to obtain the final product 10-hexadecenal. The method is mild in reaction condition and suitable for large-scale production.

The invention discloses fishy-smell-free high-emulsibility soy protein isolate and a making method thereof. The making method comprises the following steps of performing alkali liquor leaching and amber acylation; performing centrifugal separation; performing fermentation with lactic acid bacteria; performing acid precipitation; performing washing with water; performing re-dissolution; performingsterilization; performing flash distillation; and performing drying so as to obtain the soy protein isolate. Soybean protein amber acylation is combined with lactic acid bacteria fermentation, so thaton one hand, a white molecular structure is expanded, and on the other hand, metabolism of hexaldehyde coated by protein by lactic acid bacteria is facilitated, so that the purpose of making the fishy-smell-free high-emulsibility soy protein isolate is realized.

The invention discloses a method for producing chemical fiber grade cyclohexanone. The method comprises the following steps of: putting a high-silicon-content HJT02 molecular sieve which is subjected to dealumnization treatment and aperture modification into an absorption column which is vertically arranged; allowing solvent type cyclohexanone to enter from the bottom of the absorption column andflow out from the upper part of the absorption column, and absorbing; and desorbing by using steam of the chemical fiber grade cyclohexanone after the absorption is finished. By the method, the totalamount of hexaldehyde and 2-heptanone in treated cyclohexanone is less than 36mg / kg, and the standard of chemical fiber grade ketone is reached; and the method has the advantages of low energy consumption and material consumption, and is an ideal method for producing the chemical fiber grade cyclohexanone.

The invention discloses a gastric cancer VOC marker in saliva and its application in the preparation of gastric cancer diagnostic reagents. The marker refers to a combination of multiple or all of the following volatile organic compounds: acetaldehyde, 2-methylbutanal, Isopropanol, hexanal, n-butanol, cineole, nonanal, menthone, 2-ethylhexanol, menthol, anethole, dodecyl alcohol; The content of the gastric cancer VOC markers is used to diagnose gastric cancer. The invention provides a variety of volatile organic compounds in saliva as markers for the diagnosis of gastric cancer, and has broad application prospects in the early screening and diagnosis of gastric cancer.

The invention provides a method for inhibiting the browning of a gold pear core. The method comprises the following steps: step 1: fumigating pears for 12 hours in a closed space comprising 1-MCP andhexaldehyde under a normal-temperature condition, wherein the concentration of 1-MCP in the air is 0.5 to 1.5 micro liter / L, and the concentration of hexaldehyde is 500 to 2000 micro liter / L; and step2: after the fumigation, taking out the pears, packaging by using a fresh-keeping bag, and storing at 0 to 1 DEG C. The method for inhibiting the browning of the gold pear core is simple in operation, and capable of effectively preventing the browning of the core of the gold pear, keeping the fruit quality, prolonging the storage period, and reducing the decay of the pear after being harvested.

The invention relates to a novel rapeseed oil flavor enhancer and an application method thereof in preparation of a concentrated-fragrance rapeseed oil, and belongs to the field of edible oil processing technology. The invention discloses the rapeseed oil flavor enhancer. With 2,5-dimethylpyrazine, hydroxyl acetone, 2-methylpyrazine, isovaleraldehyde, hexaldehyde, 2,3,5-trimethylpyrazine, furfuryl alcohol, 2-methyl-5-ethylpyrazine, 1-methyl-4-cyclohexene, 2-heptenal, 2-methylbutyraldehyde, 2-acetylthiophene, 3-phenyl furan, 2-acetylpyrrole and 2-acetylpyridine as raw materials, the rapeseed oil flavor enhancer is formed through mixing, stirring and canning. The concentrated-fragrance rapeseed oil is prepared by directly adding the novel rapeseed oil flavor enhancer into a rapeseed oil.

The invention relates to a method for preparing isononyl alcohol from mixed octylene, which is characterized in that the isononyl alcohol is synthesized by taking the mixed octylene as a raw material under the action of a catalyst through a two-step method. The method comprises the following steps: 1) reacting raw material mixed octylene with synthesis gas on a hydroformylation heterogeneous catalyst to generate 3, 5, 5-trimethyl hexanal; and 2) continuing the reaction, and carrying out aldehyde hydrogenation reaction on the hydrogenation catalyst to generate the target product 3, 5, 5-trimethyl-1-hexanol. The method is characterized in that 1) the hydroformylation solid heterogeneous catalyst is composed of a metal component and an organic ligand polymer, and the component forms a coordinate bond; the method is characterized in that the hydrogenation catalyst in the step 2) comprises the main components of Ni, Mg, Na, a selectivity improver and a carrier material treated by ammonia, the novel solid heterogeneous catalyst is adopted in the reaction in the method, the reaction activity and selectivity are excellent, the stability is good, and the method is suitable for large-scale industrial production; and the cost of separating the catalyst from reactants and products is reduced, and the industrial application prospect is wide.

The invention relates to a clean production method of 2, 3-octanedione. The method comprises steps such as preparation of a composite catalyst, preparation of a Fe<3+>-Fe<2+> redox system and preparation of 2, 3-octanedione by acetaldehyde and n-hexaldehyde serving as raw materials. The purity of 2, 3-octanedione produced by the method reaches more than 98%, the fragrance is pure, the production condition is mild, the environment is friendly, and the industrial production is facilitated, so that 2, 3-octanedione has a good economic benefit.

The invention belongs to the technical field of food additives and particularly discloses a fresh-scent flat peach essence as well as a preparation method and application thereof. The essence comprises the following effective substance compositions: 11-13.2 parts by weight of ethyl acetate, 10.8-12.15 parts by weight of hexyl acetate, 0.633-0.756 part by weight of isobutyl acetate, 0.045-0.055 part by weight of peach aldehyde, 0.027-0.037 part by weight of hexaldehyde and 2700-3100 parts by weight of distilled water. The preparation method comprises the following steps of: mixing and dissolving the substances, thereby obtaining the fresh-scent flat peach essence. The essence has strong and vivid fresh scent of flat peaches, and is capable of obviously enhancing unique-flavor sense experience degrees of flat peach products and further enhancing the market acceptance of relevant flat peach products.

The invention belongs to the field of food and healthcare products, and particularly relates to a rice flavour oily taste quantitative detection method and application thereof. The invention provides the rice flavour oily taste quantitative detection method. The quantitative detection method comprises a step of establishing a hexaldehyde-oily taste relationship curve by detecting the content of the hexaldehyde in rice flavour, wherein a hexaldehyde content determination method is HS-GC-MS in a process of establishing the hexaldehyde-oily taste relationship curve. The invention also provides the application of the above quantitative detection method in the field of infant or baby food and / or healthcare product quality detection. According to the technical scheme provided by the invention, the oily taste can be determined directly by determining a secondary oxidation product, namely, the hexaldehyde, of rice flavour, without extracting fat first and then determining; a sample consumption amount of small; the oily taste is convenient to detect. The technical defects that accurate quantitative detection cannot be realized by a rice flavour oily taste detection method in the prior art become the problems which need to be solved by those skilled in the field are overcome.

The invention discloses a catalyst for preparing 2-ethylhexanal, comprising Al 2 o 3 carrier, and loaded on the Al 2 o 3 The first metal component and the second metal component on the carrier are characterized in that the first metal component is Ag, and one or both of Co and Rh; the second metal component is Pd ; Based on the total weight of the catalyst, the content of the first metal component is 0.01-0.5wt‰, and the content of the second metal component is 0.01-1.0wt%. The present invention also discloses a preparation method of the catalyst and a preparation method of 2-ethylhexanal. The invention can efficiently carry out the selective hydrogenation of isooctenal, greatly improves the catalyst processing capacity, has simple technological process, low energy consumption, and meanwhile, the raw material conversion rate reaches 99%, and the product selectivity reaches more than 98.5%.

The invention relates to a children educational toy multifunctional antibacterial coating, which is composed of the following components: graphite powder, isobutyl triethoxysilane, SEBS thermoplastic elastomer, chlorothalonil, methylated amino resin, polyethylene resin, urea-formaldehyde resin, N-(cyclohexylthio)phtalimide, amino propyl triethoxysilane, glycidyl acrylate, aluminium hydroxide powder, jojoba oil, dipropylene glycol butyl ether, nucleoside triphosphate, talcum powder, dioctyl adipate, polypropylene carbonate, polyamide, furfuryl alcohol, wax powder, carbendazim, sodium hydrosulfide, sodium lauroyl sarcosinate, cylindrin, azodicarbonamide, titanium dioxide, lecithin, dodecyl dimethyl benzyl ammonium chloride, sodium stannate, calcium oxide powder, and hexaldehyde. The coating has excellent performances on resisting flame, acid, alkali, mold, and bacteria, and the properties are improved.

The invention discloses a melon essence and a preparation method thereof. The melon essence comprises the following raw materials: ethyl acetate, isobutyl acetate, benzyl acetate, methyl acetate, 2-methyl-butyl acetate, propyl acetate, butyl acetate, isopropyl acetate, 2-methyl butyrate, methyl butyrate, n-hexyl alcohol, ethyl propionate, methyl octanoate, hexyl acetate, acetaldehyde, acetic acid,ethyl butyrate, 2-methyl butanol, n-hexanal, isovaleraldehyde, benzaldehyde, leaf alcohol, methyl hexanoate, n-pentanol, benzyl alcohol, 2-methyl butyraldehyde, 2,6-nonadienol, amyl acetate, butyraldehyde, leaf acetate, cis-6-nonenal, isobutyl alcohol, methyl benzoate, 2-octanone, trans-2-hexenal, and cis-6-nonene-1-ol. The preparation method of the melon essence comprises a step of mixing all the raw materials. The melon essence prepared by the preparation method is mellow and full in aroma, and strong in sense of nature. Being added as a food additive into foods, including beverages, jams,pastries and the like, the melon essence is capable of endowing the foods with natural aroma and taste of Minqin honeydew melons.

The invention discloses a novel integrated solid acid catalyst with a carbon-based structure. The novel integrated solid acid catalyst is a sulfonating carbon nano tube (CNT-SO3H@) stainless steel material and is prepared by using the stainless steel material as a support material, growing a carbon nano tube on the surface of the support material, vulcanizing through polysulfide and oxidizing. The invention simultaneously discloses a preparation method of the novel catalyst and an application in preparation of biodiesel by means of catalytic distillation. The loss of an acid position of the solid acid catalyst with the carbon-based structure is reduced; because of high heat stability and structure stability, the catalyst is easily made into various shapes and is filled into a catalytic distillation tower to be used. An original element having functions of catalyzing and separating is used for coupling a reaction process with a separation process, and because of the process, the complicated processes of pre-esterification, purification and subsequent separation are avoided; meanwhile, a glycerinum product which is used for catalyzing waste oil and methyl alcohol ester to perform exchange reaction is converted into products of glyceraldehydes, glyceric acid, hexanal dimethyl acetal, acraldehyde dimethyl acetal and the like, so that the reaction is greatly intensified; finally, a biodiesel product with high purity can be directly obtained on the top of the tower and at the bottom of the tower.

The invention discloses a method for rapidly distinguishing different varieties of rice based on aldehyde compounds, which is characterized by comprising the following steps: collecting aroma components of rice in different regions by adopting headspace solid-phase microextraction; collecting data in aroma components of rice by adopting a gas chromatograph-mass spectrometer, and screening aldehydes; the result of the volatility analysis being provided in chromatographic peak area counting; using orthogonal partial least squares discriminant analysis OPLS-DA modeling to compare rice differences in different regions. and determining the content of aldehyde substances such as hexanal, heptanal, 3-methyl-butyraldehyde, 5-methyl-hexanal, n-octanal, 2-heptenal, nonanal, trans-2-octenal, benzaldehyde, trans-2-nonenal, trans-2-decenal, lauric aldehyde, trans-2-undecenal and the like as a recognition standard. The method disclosed by the invention is small in data volume and high in distinction degree. The method can quickly and accurately identify the rice producing area, and is beneficial to further processing and utilizing rice and developing related products.

The invention discloses plum syrup essence and a production process thereof, and relates to the technical field of essence production. The plum syrup essence is prepared from benzyl acetate, geranyl acetate, dimethyl benzyl butyrate, ethyl 3-hydroxyhexanoate, peach aldehyde, benzaldehyde, hexaldehyde propylene glycol acetal, benzyl alcohol, leaf alcohol, acetic acid, propionic acid, vanilla bean tincture, benzyl acetate, phenethyl acetate, methyl ionone, osmanthus fragrans extract, iris extract, jasmine absolute oil, beta-ionone and propylene glycol; the production process comprises the following steps: preparing the raw materials; adding the raw materials into a blending kettle, stirring for more than 20 minutes, and fully dissolving the raw materials to obtain a semi-finished product essence; blending the semi-finished product essence, oil, ethanol and water, and mixing and stirring; after stirring, standing and clarifying; and removing'terpenes' floating on the upper layer of the clarified liquid to obtain the finished plum syrup essence. The preparation method has the advantages that the prepared plum juice has natural and soft characteristic aroma, and the qualified rate of the dissolving solution and the product is high in level.

The invention provides a method for preparing 2, 5-dihydroxy adipic acid and adipic acid from hexaldehyde saccharic acid. The method for preparing 2, 5-dihydroxy adipic acid comprises the following step: in the presence of a catalyst A, reacting hexaldehyde saccharic acid with hydrogen in an aqueous solution for 1 hour to obtain 2, 5-dihydroxy adipic acid. The method for preparing adipic acid comprises the following steps: 1) in the presence of a catalyst A, reacting hexanal disaccharic acid with hydrogen in an aqueous solution for 1 hour to obtain 2, 5-dihydroxy adipic acid; and 2) in the presence of a catalyst B, reacting the 2, 5-dihydroxy adipic acid for 2 to obtain adipic acid. Water is used as a reaction solvent, so that the reaction process is green, pollution-free and environment-friendly, and the production cost is reduced.

The invention discloses application of a C6 aldehyde volatile substance to inhibition of mycosphaerella fragariae. The C6 aldehyde volatile substance is hexaldehyde, trans-2-hexenal or cis-3-hexenal.The invention firstly discloses three types of C6 aldehyde volatile substances including the hexaldehyde, the trans-2-hexenal or the cis-3-hexenal in strawberry leaves, which can inhibit the mycosphaerella fragariae, especially can inhibit spore germination and mycelial growth of the mycosphaerella fragariae. In addition, the invention proves the action of the hexaldehyde, trans-2-hexenal or cis-3-hexenal in effectively inhibiting the spore germination and the mycelial growth of the mycosphaerella fragariae and the function thereof in preventing and controlling white leaf spots of strawberriesby a test utilizing the C6 aldehyde volatile substance to fumigate the mycosphaerella fragariae or strawberry leaves. The application disclosed by the invention has the beneficial effects that the apreparation for preventing and controlling the white leaf spots of strawberries caused by the mycosphaerella fragariae is prepared by adopting the hexaldehyde, trans-2-hexenal or cis-3-hexenal, the prevention and control for the white leaf spots of strawberries are carried out, the preventing and controlling effects are obvious, the use amount of pesticide can be effectively reduced and basis is provided for developing novel high-efficiency green and safe biological preventing and controlling method for preventing and controlling the white leaf spots of strawberries.