15 results about "Heptanol" patented technology

The invention relates to a nickel-based hydrogenation catalyst and a preparation method and application thereof, and relates to the technical field of catalyst preparation. The preparation method of the nickel-based hydrogenation catalyst comprises the following steps: mixing an aluminum salt and a precipitant in water, and carrying out a neutralization gelling reaction to obtain a precipitate slurry; mixing the precipitation slurry, organic acid magnesium salt and organic acid lanthanum salt, and carrying out aging reaction to obtain modified aluminum oxide powder; mixing the modified aluminum oxide powder, a peptizing agent and an extrusion aid, performing extrusion molding, and performing drying and roasting to obtain a catalyst carrier; nickel salt and organic acid cerium salt are mixed in water to prepare impregnation liquid, the catalyst carrier is impregnated with the impregnation liquid, and the nickel-based hydrogenation catalyst is obtained through drying and roasting. The nickel-based hydrogenation catalyst has good stability and carbon deposition resistance, has good catalyst activity and selectivity, can be applied to preparation of 2-propyl heptanol, and effectively improves the hydrogenation reaction conversion rate and the target product selectivity.

The invention discloses a method for detecting aflatoxin in silkworm chrysalis meal. According to the invention, a salting-out auxiliary liquid-liquid extraction technology and a supramolecular solvent extraction technology are integrated and are executed by an automatic salting-out extraction device specially designed for a pretreatment process, so that a system and a scheme for detecting aflatoxin in silkworm chrysalis meal, which integrate a special device, a core reagent and a detection method, are provided; a detection method which is green, environment-friendly, rapid, efficient, low in cost, high in sensitivity and good in accuracy is established. The preparation method comprises the following specific steps: preparing a supermolecular solvent consisting of n-heptanol, tetrahydrofuran and water and a saturated aqueous solution; the method comprises the following steps: mixing a silkworm chrysalis meal sample with a supramolecular solvent and ammonium sulfate, and carrying out vortex, centrifugation, constant volume and filtration to obtain a test solution; and carrying out quantitative analysis by adopting a matrix matching standard curve. The method is simple and convenient to operate, low in organic solvent consumption and low in cost, and is suitable for high-throughput rapid screening and quantitative detection of trace aflatoxin in silkworm chrysalis meal.

The application belongs to the technical field of quality control of traditional Chinese medicine decoction pieces and detection technology, and provides a detection method for processing degree of black sesame. The method detects the relative contents of n-heptanol, 2-methylpyrazine and trans-2-hexen-1-ol in the sample to be detected by GC-IMS; and the relative contents of the three components are substituted into the results of the Bayesian classification discriminant formula of raw and cooked states and processing degree respectively. The method of the application does not need complex sample pretreatment, is simple and environmentally friendly, has low detection cost, and the result is intuitive. To some extent, the method solves the problem that the existing evaluation method is highly subjective and difficult to evaluate the processing degree of black sesame in large quantities, quickly and objectively and accurately, and lays a foundation for the large-scale, intensive, standardized and digitalized production of traditional Chinese medicine decoction pieces.

For example, to provide a composition that can enhance the flavor of grilled squid. [Solution] Use at least one of the 14 aroma components listed in Groups A and B below. Group A: 2,3-butanedione, 3-hydroxy-2-butanone (acetoin), 3-ethylpyridine, 5-methyl-2-hexanone, 3-methylbutanal, and ethyl 3-methylbutanoate. Group B: 2-acetylthiazole, thiazole, 1-heptanol, 2,6-dimethylpyrazine, dimethyl trisulfide, 2,3,5-trimethylpyrazine, (2E,6Z)-2,6-nonadienal, and acetophenone.

The invention provides a continuous synthesis method and a continuous synthesis device of 2-propylheptyl glycerol. According to the continuous synthesis method of the 2-propylheptylglycerol, the renewable natural raw material glycerol and the byproduct 2-propylheptanol of the coal-to-olefin process are used as raw materials, and the continuous synthesis of the 2-propylheptylglycerol is performed by adopting a fixed bed reactor through a one-step reaction, so that the problems of a large amount of inorganic salt, more wastes, low production cost and the like in the traditional process are avoided. The yield of the product is up to 90% or above, and the purity of the product can be up to 99.0% or above. Moreover, the synthesis method of the 2-propylheptyl glycerol, provided by the invention, has the advantages of abundant raw material sources, low price, simple synthesis process, high product yield, high purity, low pollution, high raw material conversion rate and high economical efficiency, and is suitable for industrial large-scale production.

The invention discloses a bio-based plasticizer as well as a preparation method and application thereof, and relates to the technical field of plasticizers, and the structural formula of the bio-based plasticizer is shown in the specification. According to the bio-based plasticizer, abundant polar groups are obtained by introducing oligomeric lactic acid into a vanillic acid skeleton, and meanwhile, the proportion of non-polar groups of the plasticizer is expanded by introducing n-heptanol, so that the plasticizing performance, migration resistance and the like of the plasticizer are effectively improved, and the application of the bio-based plasticizer in polyvinyl chloride products is realized.

The application discloses a three-metal active carbon supported catalyst and application thereof, and the catalyst takes active carbon as a carrier, and a first metal element, a second metal element and an auxiliary metal element are loaded on the carrier, wherein the first metal element is selected from Rh, W and Ir, the second metal element is selected from Ga, Sn and Mg, and the auxiliary metal element is selected from La, Ce and Y. The application is applied to the catalytic hydrogenation of 4-heptanone into 4-heptanol, and when the conversion rate of 4-heptanone reaches 100%, the product selectivity of 4-heptanol can reach 100%, the burden of product separation and purification in the later stage can be greatly reduced, and the production cost is lowered; no solvent is used in the catalytic reaction process, the reaction temperature is relatively low, and the green production requirement is met; the catalyst has high activity, the reaction time is relatively short, and the production efficiency can be improved.

The application provides a device and method for producing isopentanal byproduct of oil phase of 2-propyl heptanol production device condensation circulating tower, and relates to the field of chemical industry.The device comprises a first rectifying tower and a second rectifying tower;the inlet of the first rectifying tower is communicated with the oil phase outlet of the overhead chromatograph of the 2-propyl heptanol condensation circulating tower, the bottom outlet of the first rectifying tower is communicated with the inlet of the second rectifying tower, and the bottom outlet of the second rectifying tower is communicated with the inlet of the 2-propyl heptanol condensation reactor.The method comprises the following steps: introducing materials from the oil phase outlet of the overhead chromatograph to the first rectifying tower, separating in the first rectifying tower, and obtaining a crude pentanal mixture at the bottom;the crude pentanal mixture is sent to the second rectifying tower for separation, crude n-pentanal is obtained at the bottom, and isopentanal product is obtained at the top.The device and method provided by the application simultaneously realize the production and separation of isopentanal, effectively reduce energy consumption, the equipment is simple, the production capacity is high, and large-scale industrial production is suitable.

The invention provides a nano high-molecular active antirust agent which is prepared from the following components in percentage by weight: 5.00% to 10.00% of nano zinc oxide, 5.00% to 10.00% of nano silicon dioxide, 9.00% to 15.00% of triethanolamine borate, 3.00% to 6.00% of zinc molybdate, 8.00% to 14.00% of 2-propyl heptanol polyoxyethylene ether, 4.00% to 10.00% of lauryl sodium sulfate, 2.00% to 7.00% of an amino methoxy silane coupling agent, 1.00% to 5.00% of epoxy resin and the balance of water. The antirust agent not only has excellent antirust performance, but also can adapt to various complex use environments. And the paint is non-toxic and environment-friendly.

A process for the preparation of a catalyst comprising a nickel active phase and an alumina support, said catalyst comprising from 1 to 50% by weight of elemental nickel with respect to the total weight of the catalyst, the nickel being distributed on a shell at the periphery of the support and at the core of the support, said process comprising the following steps: a) impregnation of the support with a solution of heptanol in a volume V1, said volume V1 being from 0.2 to 0.8 times the total pore volume TPV of the support, to obtain an impregnated support; b) impregnation of the impregnated support obtained at the end of step a) with a solution comprising a nickel active phase precursor, to obtain a catalyst precursor; c) drying of the catalyst precursor obtained at the end of step b) at a temperature lower than 250°C.

DEPCT66 This invention relates to a process for preparing a linker, which is... The benefits of conjugating molecules for therapeutic applications (e.g., cytotoxic substances). With targeted moisturizers (e.g., proteins, peptides, antibodies, nanoparticles, nucleic acids). During this process, lipase-like lipase B from Candida antarctica was used. Enantioselective resolution of (S,S)-2-benzyl. Thiocyclohexanol or (S,S)-2-benzyl thiocycloheptanol in the presence of an acyl group additive. (acylating agent) which is reduced for release of the protective barrier to obtain (S,S)-2-mercaptocyclo. Hexanol or (S,S)-2-mercaptocycloheptanol can then be used for crosslinking. Moisturizing agents for targeted moisturizing treatments;

The invention discloses a brown planthopper repellent as well as a preparation method and application thereof. The brown planthopper repellent comprises the following components: 2-heptanone, 2-heptanol, linalool and paraffin oil in a ratio of (0.02-0.2): (0.02-0.2): (0.02-0.2): (0.2-2). The pesticide composition can generate a repelling effect on brown planthoppers. The repellent has the characteristics of low cost, high efficiency, environmental friendliness, safety to human and livestock and the like. The nilaparvata lugens repellent disclosed by the invention has a wide industrialization prospect, is particularly suitable for being used in pollution-free production of crops due to the simple preparation method, and has wide economic, social and ecological benefits.

A fuel additive composition comprising butanol, pentanol, hexanol, heptanol, methylcyclohexanol, ethyl vinyl ether and nonanol. The composition may comprise 1-butanol, 2-butanol, 2-pentanol, 3-hexanol

The invention discloses a brown planthopper repellent and application thereof. The brown planthopper repellent comprises the following components: farnesene, 2-heptanol, (E)-2-hexenal and paraffin oil, wherein the ratio of farnesene to 2-heptanol to (E)-2-hexenal to paraffin oil is (0.04-0.16): (0.04-0.16): (0.04-0.16): (0.4-1.6); the pesticide composition can generate a repelling effect on brown planthoppers. The repellent has the characteristics of low cost, high efficiency, environmental friendliness, safety to human and livestock and the like. The nilaparvata lugens repellent disclosed by the invention has a wide industrialization prospect, is particularly suitable for being used in pollution-free production of crops due to the simple preparation method, and has wide economic, social and ecological benefits.

This invention relates to fuel additive compositions, blended fuels and the production thereof. In particular, the invention relates to a fuel additive composition that contains butanol, pentanol, hexanol, heptanol, methylcyclohexanol, ethyl vinyl ether and nonanol.