54 results about "Dodecanol" patented technology

The invention discloses a method for preparing 12-mercaptan through solid organic acid catalysis, belongs to the technical field of 12-mercaptan preparation, and aims to solve the problems of low catalyst activity, harsh reaction conditions, serious pollution, high cost and dependence on import in the prior art. N-dodecanol and hydrogen sulfide are used as raw materials and are mixed according to the molar ratio of 1: 1.2-1: 1.3; the method comprises the following steps: gasifying n-dodecanol, mixing with purified hydrogen sulfide, preheating to 210-240 DEG C, introducing into a fixed bed reactor filled with a solid organic acid catalyst, and reacting at-0.08-3.0 MPa for 3.5-4 hours; and cooling and condensing the reaction product, carrying out gas-liquid separation, rectifying and purifying the liquid product to obtain 12-mercaptan with the purity of more than or equal to 99.5%, and recycling unreacted hydrogen sulfide. The solid organic acid can be a catalyst of p-toluenesulfonic acid and the like or mesoporous silica loaded nickel, cobalt and molybdenum metal oxides. The method has the advantages of high catalytic activity, mild reaction conditions, high product yield (the conversion rate of n-dodecanol is greater than or equal to 94.5%), environmental protection and low cost, can realize the domestic mass production of 12-mercaptan, and meets the market demand.

A solid gel foam fire extinguishing agent includes a material A and a material B; the material A includes the following components in mass percentage: 18% to 25% of an inorganic silicate, 0.25% of sodium carboxymethyl cellulose, 0.25% of sodium alginate, 0.1% to 0.5% of xanthan gum, 0.5% to 1% of polyvinyl alcohol, 0.5% to 1.5% of sodium lauryl sulfate, 0.01% to 0.05% of dodecanol, 0.005% to 0.01% of disodium ethylenediaminetetraacetate, and water as a balance; and the material B includes the following components in mass percentage: 25% of sodium dihydrogen phosphate, 25% of acetic acid, 1% to 1.5% of fatty alcohol polyoxyethylene ether, 0.1% to 0.5% of 3% aqueous film-forming foam, 0.01% to 0.05% of the dodecanol, and water as a balance. The fire extinguishing agent exhibits advantages including low density, low oil wettability, high resistance, high adhesiveness, and foam collapse-resistant properties in fire resistance.

The invention discloses a generalized pustular psoriasis diagnosis marker based on metabonomics and application of the generalized pustular psoriasis diagnosis marker. The diagnostic marker is prepared from one or more of the following 35 compounds: pyruvic acid, alpha-ketoisovaleric acid, 2-hydroxybutyric acid, 3-hydroxybutyric acid, methane thiophosphoric acid, proline, uracil, tranexamic acid, 4-aminobutyric acid, threonine, scopoletin, dodecanol, N-methyl-L-leucine, L-cysteine-glycine and L-kynurenine. The feed additive is prepared from the following raw materials: 3-hydroxybenzoic acid, allantoin, delta-tocopherol, xylofuranose, glucose-1-phosphoric acid, pyrophosphate, taurine, L-asparagine, phthalic acid, 4-(dimethylamino) azobenzene, 5-tert-butyl-1h-indole-2, 3-dione, quinic acid, glucose, histidine, lysine, palmitic acid, 7-methylguanine, oleic acid and whale acid. The marker can be used for accurately distinguishing patients with generalized pustular psoriasis from healthy people.

The utility model relates to the technical field of dodecanol glycidyl ether production, in particular to a dodecanol glycidyl ether production synthesis feeding device which comprises a supporting base, a processing barrel and a sealing cover, an auxiliary synthesis mechanism is arranged in the processing barrel, a premixing hedging mechanism is arranged on the side edge of the processing barrel, and the sealing cover is arranged on the supporting base. When the dodecanol glycidyl ether production synthesis feeding device is used, a partition plate is arranged in the liquid storage tank to store dodecanol stock solution and glyceryl ether stock solution separately, and two variable-speed water pumps are arranged; when the dodecanol stock solution and the glyceryl ether stock solution need to be proportioned and fed, only the corresponding variable-speed water pumps need to be adjusted to a proper speed ratio, the operation is simple, rapid proportioning and feeding of the dodecanol stock solution and the glyceryl ether stock solution can be conveniently completed, the overall structural design is simple, and the practical effect is good.

The invention relates to a microemulsion type suckercide as well as a preparation method and application thereof, the microemulsion type suckercide comprises the following components in percentage by weight: 30% of mixed ester alcohol component, 10% of absolute ethyl alcohol, 5% of n-butyl alcohol, 25% of emulsifier and 30% of water; the mixed ester alcohol component comprises 36 to 54.6 percent of n-caprylic alcohol, 45 to 63.9 percent of n-decanol and 0.1 to 0.4 percent of dodecanol, and the emulsifier is preferably polyoxyethylene 40 hydrogenated castor oil. The microemulsion type suckercide can be applied as a tobacco suckercide, when the suckercide is applied to tobacco suckercide, the dilution multiple is 8 times, the application method is cup spraying suckercide, and the dosage of the diluted suckercide per plant is 25 mL. The microemulsion type suckercide is green in formula, has an efficient suckercide effect on tobacco, is long in lasting period, does not contain components such as pendimethalin, butralin and flumetralin, and avoids the problem that chemical pesticide residues in tobacco leaves exceed the standard after an existing chemical suckercide is applied.

The invention discloses a generalized pustular psoriasis diagnosis marker based on metabonomics and application of the generalized pustular psoriasis diagnosis marker. The diagnostic marker is prepared from one or more of the following 35 compounds: pyruvic acid, alpha-ketoisovaleric acid, 2-hydroxybutyric acid, 3-hydroxybutyric acid, methane thiophosphoric acid, proline, uracil, tranexamic acid, 4-aminobutyric acid, threonine, scopoletin, dodecanol, N-methyl-L-leucine, L-cysteine-glycine and L-kynurenine. The feed additive is prepared from the following raw materials: 3-hydroxybenzoic acid, allantoin, delta-tocopherol, xylofuranose, glucose-1-phosphoric acid, pyrophosphate, taurine, L-asparagine, phthalic acid, 4-(dimethylamino) azobenzene, 5-tert-butyl-1h-indole-2, 3-dione, quinic acid, glucose, histidine, lysine, palmitic acid, 7-methylguanine, oleic acid and whale acid. The marker can be used for accurately distinguishing patients with generalized pustular psoriasis from healthy people.

The invention provides a preparation method of a surfactant for clethodim, which comprises the following steps: heating raw materials, preserving heat to 50 DEG C, adding the materials one by one, and stirring until the materials are completely uniform, light yellow and transparent. The raw materials comprise calcium dodecyl benzene sulfonate, dodecanol polyoxyethylene ether, polystyrylphenol polyoxyethylene ether and an ethylene oxide-propylene oxide high-molecular block polymer. The surfactant is matched with other surfactants, the problem is solved by utilizing a synergistic effect, the preparation operation is simple, and the working efficiency is improved.

Proposed are preparations comprising (i) a mixture of substances comprising (a) one, two or more compounds selected from the group consisting of (a1) alcohol monoterpenes of the formula (I) where R1 is H or methyl, R2 is H or C2-alkenyl, and R3 is a linear or branched, saturated or unsaturated hydrocarbon radical having 4 to 10 carbon atoms, and their enantiomers, diastereomers, racemates, solvates and physiologically acceptable salts, and / or (a2) bicyclic epoxy monoterpenes, (b) at least two lactones of the formula (II) where R4 is H or methyl, R5 is a linear or branched, saturated or unsaturated hydrocarbon radical having 2 to 10 carbon atoms and n is the number 1 or 2, and their enantiomers, diastereomers and racemates, and (c) one, two or more Solvent selected from the group consisting of ethanol, water, dipropylene glycol (DPG), diethyl phthalate (DEP), propylene glycol (PG),Isopropyl myristate (IPM), isopropyl palmitate (IPP), triethyl citrate (TEC), triacetin (TRI), 1,2-propanediol, 1,3-propanediol, propanetriol, pentanediol, hexanediol, octanediol, decanediol, dodecanol, 4-hydroxyacetophenone, butylene glycol, pentylene glycol, hexylene glycol, decylene glycol, propylene carbonate, butylene carbonate, glycerol carbonate, 2-benzylheptanol, trimethyl hydroxypentyl isobutyrate, glyceryl caprylate, ethylhexylglycerin, benzyl benzoate (BB), and optionally (d) further flavorings or fragrances selected from the group consisting of 3-phenylbutanal, acetylmethylcarbinol, anethole, anisyl acetate, dihydroeugenol, linalyl formate, 2-methyldecanal, 2-Benzyl-2-methylbut-3-ene nitrile, 3-hexenyl acetate, styralyl acetate, citronellal, cinnamyl acetate, rhubafuran, betalonone, anther, prenyl acetate, 2-phenylpropanal, 4-(4-hydroxyphenyl)butan-2-one, ethylphenoxyacetate, isoraldein, gamma-terpinene, Limonene, Neocyclocitral, Methyl Lavender Ketone, Styralyl Propionate, Phenyl Ethyl Propionate, Limonenal,4-Isopentylcyclohexanol, 4-methyl-2-phenyl-3,6-dihydro-2H-pyran / 4-methylene-2-phenyl-tetrahydropyran, hydrocitronitrile, phenoxanol, isoamylphenyl acetate, damascone, silvial, nectaryl, ambroxide, acetylpyrazine, trimethylpyrazine, isoamyl acetate, cresyl methyl ether para, filbertone, cyclohexyl acetate, heliotropin, acetophenone, anisaldehyde, methylacetophenone para, veratraldehyde, methyl anisate and vertoprenal, and (ii) aldehydes of the formula (III) where R6 is a saturated or unsaturated, linear hydrocarbon radical, and / or (iii) free fatty acids of the formula (IV) where R7 is a linear or branched, saturated hydrocarbon radical.

The invention discloses a phase change material and an indoor refrigeration air conditioning system using the same, and belongs to an indoor air conditioning system, the phase change material comprises the following components by weight percentage: 78%-82% of modified sodium nitrate hydrate, 9%-11% of dodecanol derivative, 4%-6% of graphite powder, 0.8%-1.2% of borax, 2.5%-3.5% of trichloroethyl phosphate, and 0.8%-1.2% of 2, 6-di-tert-butyl-4-methylphenol. The phase change temperature of the composite-formula phase change material is controlled to be 10 + / -0.5 DEG C, the composite-formula phase change material is more suitable for the requirement of indoor refrigeration, the latent heat of the composite-formula phase change material reaches 200J / g, the absorption duration is remarkably prolonged, and the requirement of long-acting cooling can be met. And after the composite phase change material is applied to an air conditioning system, cold storage can be carried out through a refrigerating machine during off-peak electricity, cold energy is released by the phase change material in non-off-peak electricity time, the electric charge cost can be remarkably saved in long-term use, and the load pressure on a power grid is reduced in peak hours.

The invention relates to the technical field of industrial wastewater treatment, and discloses a bio-based nylon production wastewater treatment method which comprises the following steps: inputting dodecanol-containing wastewater generated in a bio-based nylon production cell workshop into a static oil separation tank, and separating the dodecanol-containing wastewater into an upper oil item and a bottom clear liquid after precipitation; conveying the bottom clear liquid into an air flotation lifting tank, adding cell secondary condensate water, and dividing the bottom clear liquid mixed with the cell secondary condensate water into the bottom clear liquid and an upper oil item again under the action of an air flotation machine until more than or equal to 90% of dodecanol is removed from the bottom clear liquid. Through preliminary separation of the static oil separation tank and deep treatment of the air floatation lifting tank, 90% or more of dodecanol in the wastewater is removed in stages, and the NF concentrated liquid enriched with dodecanol is reused for production in a cell workshop, so that the defect that high-value components are not recycled in the traditional technology is overcome, the raw material cost is remarkably reduced, and resource waste is avoided.

The invention discloses reinforced high polymer modified asphalt and a preparation method thereof, and relates to the technical field of modified asphalt. The reinforced high polymer modified asphalt is prepared from the following raw materials in parts by weight: 100 parts of matrix asphalt, 4 to 6 parts of SBS (Styrene Butadiene Styrene), 0.3 to 0.6 part of cross-linking agent, 2 to 3.5 parts of plasticizer, 1 to 3 parts of anti-aging agent and 1.5 to 3 parts of nano filler, the preparation method comprises the following steps: reacting 2-formylphenylboronic acid with methanol to generate a dimethyl 2-formylphenylboronic acid compound; the preparation method comprises the following steps: reacting a 2-formylphenylboronic acid dimethyl ester compound with 1-amino-1-dodecanol to generate a boric acid ester-imine long-chain compound; and reacting the borate-imine long-chain compound with 3-glycidyl ether oxypropyl trimethoxy silane to generate the plasticizer. The reinforced high polymer modified asphalt prepared by the invention has good interface adhesion, high and low temperature stability (high-temperature deformation resistance and low-temperature crack resistance) and self-repairing performance.

A solid gel foam fire extinguishing agent includes a material A and a material B; the material A includes the following components in mass percentage: 18% to 25% of an inorganic silicate, 0.25% of sodium carboxymethyl cellulose, 0.25% of sodium alginate, 0.1% to 0.5% of xanthan gum, 0.5% to 1% of polyvinyl alcohol, 0.5% to 1.5% of sodium lauryl sulfate, 0.01% to 0.05% of dodecanol, 0.005% to 0.01% of disodium ethylenediaminetetraacetate, and water as a balance; and the material B includes the following components in mass percentage: 25% of sodium dihydrogen phosphate, 25% of acetic acid, 1% to 1.5% of fatty alcohol polyoxyethylene ether, 0.1% to 0.5% of 3% aqueous film-forming foam, 0.01% to 0.05% of the dodecanol, and water as a balance. The fire extinguishing agent exhibits advantages including low density, low oil wettability, high resistance, high adhesiveness, and foam collapse-resistant properties in fire resistance.

The invention provides a phase-change self-repairing lightweight aggregate concrete material and a preparation method thereof.The method comprises the steps that 1, phase-change self-repairing lightweight aggregates prepared from hexadecane, dodecanol, decanoic acid, lauric acid, tetradecanoic acid and a repairing agent are mixed according to the mass ratio of 1: 1: 1: 1: 1, and composite phase-change self-repairing lightweight aggregates are obtained; secondly, the shale pottery sand is pre-wetted to reach a saturated surface dry state; 3, uniformly dry-mixing silica fume, cement, fly ash, floating beads and nano-silica in a concrete mixer to obtain a primarily mixed dry material; 4, adding composite phase change self-repairing lightweight aggregate, 50% of water, 50% of an additive and 50% of carbon fibers into the primarily mixed dry material, and uniformly stirring to obtain a medium mixed material; and 5, adding shale pottery sand, 50% of water, 50% of an additive and 50% of carbon fibers into the medium mixture, and uniformly stirring to obtain the phase-change self-repairing lightweight aggregate concrete.

This invention discloses an ultra-low friction lubricating material system with self-catalytic effect and its preparation method, belonging to the field of lubricant technology. The ultra-low friction lubricating material system is composed of a base oil, an organometallic catalyst, and organic additives. The organometallic catalyst is at least one selected from ferrocene, cobalt carbonate, cobalt oxalate, copper acetate, and nickel oxalate. The organic additives are at least one selected from o-xylene, ethylene glycol, dodecanol, oleic acid, and tetraethyl orthosilicate. During friction, the organometallic catalyst releases metal ions, which, under the action of frictional heat and contact pressure, catalyze the base oil components to form a carbonaceous lubricating film in situ on the surface of the friction pair. The organic additives provide an additional carbon source during friction, working together with the organometallic catalyst to reduce the break-in time for the friction pair to reach a stable state. This lubricating material system not only significantly reduces the coefficient of friction and wear rate but also significantly shortens the break-in time.

The invention relates to a tobacco bud inhibitor based on fatty alcohol, which comprises the following components in percentage by weight: 30% of mixed ester alcohol component, 15% of polyoxyethylene 40 hydrogenated castor oil and 55% of absolute ethyl alcohol, the mixed ester alcohol component comprises 35%-54.6% of n-caprylic alcohol, 45%-64.6% of n-decanol and 0.1%-0.4% of dodecanol, the tobacco suckercide is an emulsifiable concentrate suckercide, and the tobacco suckercide effect can reach 80% or above. The tobacco suckercide is reasonable in formula, good in suckercide effect, long in lasting period and free of pendimethalin, butralin, flumetralin and other components, and the problem that after an existing chemical suckercide is applied, tobacco leaf chemical pesticide residues exceed the standard is solved.

The utility model belongs to the technical field of oil-water separation equipment, and particularly relates to an oil-water separation system for producing dodecanol ester and cetyl alcohol ester. Comprising a reaction kettle, a condenser, a buffer tank, a mixed phase feeding pump, a separator feeding pipe, an oil-water separation tank, a water phase buffer tank, an alkali liquor tank, a neutralization buffer tank, a Venturi mixer, an MVR evaporator, a thickener, a centrifugal machine, a mother liquor buffer tank and an oil phase buffer tank. The condenser comprises a shell pass pipeline and a tube pass pipeline. The reaction kettle, the oil-water separation tank, the neutralization tank, the MVR evaporator, the thickener and the like are connected in series, an oil-water mixed phase after reaction is fed into the oil-water separation tank, efficient layering is realized in the oil-water separation tank depending on different oil-water densities, and then an oil phase and a water phase are respectively stored; the separated water phase is subjected to post-treatment, the acid content in the wastewater is reduced, and the oil phase is recycled, so that oil and water after oil-water separation can be reasonably treated, and pollution to natural water is reduced.

The application belongs to the technical field of isomer separation, and particularly relates to a metal oxide modified MgO-SiO2 solid alkali catalyst, a preparation method and application thereof. The metal oxide modified MgO-SiO2 solid alkali catalyst is prepared first, and under the catalyst, the secondary ester in dodecanol ester isomers reacts with acid or acyl chloride as much as possible, and the reaction of the hydroxyl on the primary ester is reduced as much as possible. After the dodecanol ester formed by the reaction is separated, the content of the primary ester in the dodecanol ester is naturally obviously improved. There are a large number of basic centers on the surface of the catalyst, the steric hindrance of the hydroxyl on the secondary ester is small, the secondary ester is more easily combined with the basic centers on the surface of the carrier and subjected to subsequent reaction, and the steric hindrance of the hydroxyl on the primary ester is large, so the primary ester is not easily adsorbed on the basic centers of the catalyst, thereby reducing the reaction probability of the primary ester.

The invention discloses a generalized pustular psoriasis diagnosis marker based on metabonomics and application of the generalized pustular psoriasis diagnosis marker. The diagnostic marker is prepared from one or more of the following 35 compounds: pyruvic acid, alpha-ketoisovaleric acid, 2-hydroxybutyric acid, 3-hydroxybutyric acid, methane thiophosphoric acid, proline, uracil, tranexamic acid, 4-aminobutyric acid, threonine, scopoletin, dodecanol, N-methyl-L-leucine, L-cysteine-glycine and L-kynurenine. The feed additive is prepared from the following raw materials: 3-hydroxybenzoic acid, allantoin, delta-tocopherol, xylofuranose, glucose-1-phosphoric acid, pyrophosphate, taurine, L-asparagine, phthalic acid, 4-(dimethylamino) azobenzene, 5-tert-butyl-1h-indole-2, 3-dione, quinic acid, glucose, histidine, lysine, palmitic acid, 7-methylguanine, oleic acid and whale acid. The marker can be used for accurately distinguishing patients with generalized pustular psoriasis from healthy people.

The invention provides for an ectoparasiticidal composition for the effective treatment of infestation of human hair by ectoparasites such as lice and lice eggs. The present composition comprises a polysiloxane active ingredient at 75% to 90% w / v, a first ester at 10% to 17% w / v, a second ester different to the first ester at 2% to 8% w / v, an antioxidant at 0.0001% to 0.1% w / v and a C6-C16 aliphatic alcohol at 0.4% to 2.0% w / v; wherein the polysiloxane may comprise a kinematic viscosity in the range of 10 to 200 mm2 / s. The polysiloxane may comprise dimethiconol, dimethicone or phenyl dimethicone. The first ester may comprise diisopropyl adipate, neopentyl glycol diethylhexanoate or diisostearyl malate and the second ester may comprise diisopropyl sebacate, neopentyl glycol diethylhexanoate or diisostearyl malate. The antioxidant may comprise vitamin E and the C6-C16 aliphatic alcohol may comprise 1-deconol, 1-tetradeconol or dodecanol. The invention further provides for said ectoparasiticidal composition being used in the treatment of infestation in humans by parasites from the families Pediculidae and Pthiridae.

The present invention relates to a composite foam hydrogel organic sewage purifier and a preparation method thereof. The technical solution is as follows: urea and carbon black are added to deionized water, stirred, dried, heated under a nitrogen atmosphere, washed, and filtered to obtain a carbon black composite g-C3N4 photocatalytic agent. Polyvinyl alcohol is added to deionized water, and then agar powder and carbon black composite g-C3N4 are added and stirred; then sodium dodecyl sulfate, dodecanol, and gum arabic are added and stirred continuously to obtain a composite foam hydrogel slurry, which is cast and freeze-dried to obtain a composite foam hydrogel. Carnauba wax and beeswax are added to anhydrous ethanol, stirred, and ultrasonically treated to obtain a hydrophobic mixed wax suspension. The hydrophobic mixed wax suspension is sprayed on a large plane on the surface of the composite foam, and freeze-dried to obtain a composite foam hydrogel organic sewage purifier. The process of the present invention is simple and low in cost; the product thus prepared not only has a long service life, but also has high water evaporation efficiency and organic matter degradation efficiency.

The present invention belongs to the field of biotechnology, and particularly relates to Enterococcus italicus for producing fatty alcohols and its applications. Aiming at the problems existing in the production of fatty alcohols by existing microorganisms through fermentation, such as low yield, slow strain improvement, cumbersome detection process, physiological toxicity, and unreasonable selection of metabolic pathways, the present invention provides a strain of Enterococcus italicus for producing fatty alcohols, with the preservation number of CGMCC NO.25136. This strain can simultaneously produce n-heptanol, 1-dodecanol, 1-pentadecanol, 1-hexadecanol, and 1-nonadecanol, providing a strain selection for the preparation of fatty alcohols by microorganisms, and facilitating the research on the synthesis pathway of higher fatty alcohols to improve the ability of engineered bacteria to synthesize fatty alcohols.

The invention discloses a preparation method of dodecyl chloroformate, which comprises the following steps: heating dodecanol to melt the dodecanol into a liquid state, introducing phosgene for reaction, reducing the reaction temperature to 0-20 DEG C in the reaction process, continuing the reaction until the content of the dodecanol in the reaction system is less than 0.5%, stopping introducing the phosgene, and keeping the temperature to obtain a reaction liquid; and heating the reaction liquid to 30 DEG C or above, introducing nitrogen, and removing impurities in the reaction liquid to obtain dodecyl chloroformate. Compared with the conventional method, the preparation method of dodecyl chloroformate can effectively improve the reaction conversion rate and selectivity by optimizing the reaction temperature of each stage in the reaction process, and can quickly and simply prepare high-yield and high-purity dodecyl chloroformate, the content is greater than or equal to 98%, the yield is greater than or equal to 98%, the product competitiveness can be improved, and the method is suitable for industrial production. The industrial application is convenient to realize and the industrial practicability is high.

The application discloses molybdenum-doped nano zinc oxide with high visible light photocatalytic performance and a preparation method and application thereof. The molybdenum-doped nano zinc oxide is prepared from 1-octadecene, 1-dodecanol, oleic acid, a zinc source and a molybdenum source through vacuum degassing treatment, uniform stirring under a nitrogen atmosphere, heating to 100-140 DEG C, keeping warm until solid particles are dissolved, heating to 220-250 DEG C, keeping warm for 0.5-1 h of reaction, and cooling, washing and drying. The molybdenum-doped nano zinc oxide produces a local surface plasmon resonance absorption peak in the range of 600-700 nm through molybdenum ion doping, and the nano powder has a diameter of 5-20 nm; and the visible light photocatalytic performance of the zinc oxide material is greatly improved under the condition of visible light.

The present invention relates to the technical field of measurement. Disclosed are a method for measuring impurity contents in poly-L-lactic acid and a use. The method comprises: dissolving a poly-L-lactic acid sample in dichloromethane and adjusting same to a fixed volume to prepare a test solution; and injecting the test solution into a gas chromatograph, recoding a chromatogram, and computing the contents of dodecanol and 2-ethylhexanoic acid by means of an external standard method. The method for measuring impurity contents in poly-L-lactic acid provided in the present invention allows for simultaneous measurement of two impurities, i.e., dodecanol and 2-ethylhexanoic acid, achieves good separation degrees on the two impurities, is simple to operate, and achieves high specificity, high sensitivity, high accuracy, high reproducibility, and high durability; the retention times of chromatographic peaks of substances to be measured are appropriate, and impurities are quantified by using an external standard method, the measurement results are accurate and reliable, and both dodecanol and 2-ethylhexanoic acid can be effectively measured, thereby providing a basis for quality control of poly-L-lactic acid.

The invention discloses a crop foliar spray which is prepared from the following components in percentage by weight: 18%-24% of dodecanol, 9%-12% of hexadecanol, 0.6%-0.9% of an emulsifier, 0.36%-0.48% of n-butyl alcohol, 2.3%-2.7% of a regulator and 48%-60% of water, the invention also provides a preparation method and an application method of the crop foliar spray. By adopting the crop foliar spray, the preparation method and the application method provided by the invention, the stress resistance, the yield and the storage resistance of crops are effectively improved.

The invention discloses a preparation method of polyether modified silicone oil for preparing an antistatic agent. Comprising the following steps: S1, polyether modified silicone oil raw materials comprise the following components in parts by weight: 100 to 150 parts of high hydrogen-containing silicone oil, 50 to 100 parts of octamethyltetrasiloxane, 50 to 100 parts of hexamethyldisiloxane, 1 to 5 parts of a catalyst, 80 to 100 parts of allyl polyether, 100 to 150 parts of nitrogen, 30 to 50 parts of white oil, 5 to 15 parts of dodecanol and 1 to 5 parts of a polyether activation catalyst; s2, mixing the high-hydrogen-content silicone oil in the S1, octamethyltetrasiloxane, hexamethyldisiloxane and a catalyst, and carrying out a ring-opening polymerization rearrangement reaction under the catalysis of the catalyst to obtain a mixed solution; and S3, filtering the mixed solution in the S2 to obtain the low-hydrogen silicone oil. The polyether modified silicone oil prepared by the invention has the advantages of few impurities and light color, so that the produced polyether modified silicone oil product has high purity and good performance.

The invention relates to the field of oil-gas exploration and development, and discloses a lubricant composition for a drilling fluid and a drilling fluid system. The lubricant composition for the drilling fluid comprises dialkyl phthalate and 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate. The lubricant composition has good lubricating property and good compatibility with drilling fluid, can be used under complex conditions of high temperature, high salt and the like, effectively reduces the lubricating coefficient of the drilling fluid, and solves the problems of overlarge friction resistance and overlarge torque in the drilling process.

The invention provides a phase-change ceramsite aggregate and a preparation method thereof.The method comprises the steps that 1, Yunnan concrete stone is cleaned, put into an acid solution to be soaked, taken out, washed to be neutral and put into a drying oven to be dried to be constant in weight; 2, performing particle size screening on the pretreated Yunnan concrete stone, dividing the Yunnan concrete stone into five particle sizes, and drying the Yunnan concrete stone until the weight is constant; 3, enabling the phase change material to be in a liquid state, hexadecane, dodecanol, decanoic acid, lauric acid and tetradecanoic acid; 4, the phase change material and the cloud concrete stone are placed in a vacuum barrel, and the constant temperature is 60 DEG C; 5, the phase change material is fully adsorbed into internal pores of the cloud concrete stone; 6, after adsorption is finished, taking out the cloud concrete stone, wiping off the residual phase change material on the surface, placing the cloud concrete stone in cold water for condensation, and airing after cooling and solidification; 7, cement paste is prepared, and the surface of the phase change aggregate is evenly wrapped by the cement paste; and 8, mixing geopolymer slurry: mixing the cloud concrete stones with five particle sizes according to a certain proportion, filling into a mold, curing, and removing the mold.

The application discloses a super-hydrophobic self-cleaning coating material and a preparation method thereof. The super-hydrophobic self-cleaning coating material comprises 1-3 parts of a silicon-based mesoporous material, 4-5 parts of coconut oil diethanolamide, 1-3 parts of nano-titanium dioxide, 3-5 parts of methacrylic acid dodecanol ester, 1-3 parts of a polyethylene glycol type antistatic agent, 1-3 parts of expanded graphite, 1-3 parts of nano-graphene, 30-50 parts of anhydrous ethanol and 20-30 parts of acetone. In the application, the synergistic effect of the components is used, so that the coating has good hydrophobicity, durability, stain resistance, transmittance and antistatic property, the self-cleaning effect of the coating is good, the service time of the coating is greatly improved, and the cost of frequently replacing the coating is reduced.

The invention provides a high-suspension sand-containing continuous phase fluid composition, a coating and a preparation method, and belongs to the technical field of coating preparation, the high-suspension sand-containing continuous phase fluid composition comprises the following components by weight: 10-15 parts of deionized water; 0.5 to 0.7 part of a bactericide; 0.02 to 0.03 part of xanthan gum; 0.24 to 0.3 part of magnesium lithium silicate; 0.3 to 0.5 part of a defoaming agent; 0.3 to 0.5 part of a preservative; 2 to 2.5 parts of ethylene glycol; 2 to 3 parts of dodecanol ester; 65 to 75 parts of a continuous phase emulsion; 0.2-0.3 part of an associative thickener and 8-15 parts of quartz sand, and the particle size of the quartz sand is 80-120 meshes. The high-suspension sand-containing continuous-phase fluid composition provided by the embodiment of the invention has good fluidity and suspension stability, and can keep quartz sand in a suspension state without sinking to the bottom.