39 results about "N-Octanoic acid" patented technology

The invention relates to an energy-saving cooling fluid which takes glycol as a base material, and has the following components according to mass percentage: 92 to 95 of the glycol, 1 to 3 of deionized water, 0.5 to 1.5 of decanedioic acid, 0.6 to 2 of n-octanoic acid, 0.4 to 1.5 of potassium hydroxide, and 0.3 to 0.8 of methenamine. The cooling fluid has low freezing point, wide boiling spread, excellent heat conductivility at high temperature, and energy-saving efficiency, prevents frozen injury and occurrence of steam blocking layer when the engine works, improves the thermal equilibrium temperature when the engine works, with the fuel completely combusted, reduces tail gas discharge, and obviously promotes the power.

The invention relates to an alloy material liquid forging release agent. The alloy material liquid forging release agent is prepared from the following ingredients: 6-18% of mullite, 1-5% of talcum powder, 0.5-5% of light silicon oxide, 1-5% of diatomite, 0.5-1% of sodium polycarboxylate, 0.1-1.5% of iso-tridecanol polyoxyethylene ether, 0.05-0.1% of sodium polyacrylate, 0.05-1.5% of n-octanoic acid, 0.05-1.5% of n-capric acid, 0.02-0.6% of magnesium hydrogen phosphate trihydrate, 0.5-1.5% of arabic gum, 0.05-0.8% of potassium polyoxyethylene ether phosphate, 0.5-1.5% of polyether organic silicone, 0.01-0.3% of dialkyl sulfosuccinate and the rest of deionized water. The invention further provides a preparing method of the release agent. The alloy material liquid forging release agent can avoid die attaching, cold shut and air vent phenomena in the liquid forging process, and the technology of the preparing method is easy to operate and low in cost.

A synthetic method for bis-trimethylolpropane n-octoate used for a carbon fiber oil agent includes the steps of successively adding an acidic ionic liquid [Hmim]HSO4, bis-trimethylolpropane, and n-octanoic acid into a reaction kettle provided with an electronic stirrer, a temperature meter and a condensing tube, slowly increasing the temperature, and performing reflux for certain time with the reaction temperature controlled, decreasing the temperature of the reaction liquid when the reaction is finished, allowing the reaction liquid to stand for layering, and water-washing and drying the supernatant bis-trimethylolpropane n-octoate to obtain a light-yellow oily product.

The invention discloses waterborne acrylic modified epoxy ester emulsion anticorrosive coating. The waterborne acrylic modified epoxy ester emulsion anticorrosive coating comprises a main material andauxiliary materials. The main material is waterborne acrylic modified epoxy ester, and defoaming agents, dispersing agents, titanium dioxide, precipitated barium sulfate, antirust pigment, driers, co-solvents, neutralizers and deionized water are mixed with one another to obtain the auxiliary materials. The waterborne acrylic modified epoxy ester emulsion anticorrosive coating has the advantagesthat modified epoxy ester which is the waterborne acrylic modified epoxy ester made from bisphenol A type epoxy resin and n-octanoic acid by means of mixing is used as the main material for preparingthe waterborne acrylic modified epoxy ester emulsion anticorrosive coating, epoxy ester is stably dispersed in water, the stability of molecules in the waterborne acrylic modified epoxy ester emulsionanticorrosive coating can be improved, accordingly, the water resistance, the acid resistance and the alkali resistance of the waterborne acrylic modified epoxy ester emulsion anticorrosive coating can be improved, and the waterborne acrylic modified epoxy ester emulsion anticorrosive coating is high in storage stability and smearing and drying speed; dispersion kettles are separately washed by deionized water by three times in preparation procedures, wash water is added into blending kettles to be used as a backing material, accordingly, sufficient fatty acid double bonds in the epoxy estercan be guaranteed, oxidative polymerization can be facilitated, raw materials can be saved, and the production cost can be reduced.

The present invention is related to: (1) a cosmetic preparation including an emulsifying agent, 1,3-propanediol (PDO), and a PDO difatty acid ester, wherein the fatty acids constituting the PDO difatty acid ester are one or two or more types of fatty acids selected from isostearic acid, n-octanoic acid, and n-decanoic acid, and a method for producing the cosmetic preparation; (2) a composition for cosmetic preparations, which includes the PDO difatty acid ester, a cosmetic preparation including the composition for cosmetic preparations, and a method for producing the cosmetic preparation; and (3) a cleanser for industrial use, which includes a PDO difatty acid ester that has fatty acid residues of n-octanoic acid and n-decanoic acid. The present invention is able to provide: a cosmetic preparation, a composition for cosmetic preparations, and a cosmetic preparation including the composition for cosmetic preparations, which have excellent cleansing properties, low irritation properties, moisturizing properties, and feeling of use, with reduced load on the environment; methods for producing the same; and, in addition, a cleanser for industrial use which has excellent cleansing properties and low corrosion properties, with reduced load on the environment.

The invention relates to a preparation method of N-fmoc-D-methionine-O-octanoyl-serine/threonine, the preparation method mainly solves the technical problems that a prior synthetic method is difficultto operate, environmental protection cannot be ensured in purification and enlargement production. According to the technical scheme: the preparation method includes the following steps of: using N-fmoc-D-methionine-serine/threonine-benzyl ester as a starting material, carrying out condensation reaction with n-octanoic acid by adding a condensing agent to obtain N- fmoc-D-methionine-O-octanoyl-serine/threonine-benzyl ester, purifying, adding the N- fmoc-D-methionine-O-octanoyl-serine/threonine-benzyl ester in a debenzyl reagent to remove the benzyl through palladium carbon hydrogenation toobtain the N-fmoc-D-methionine-O-octanoyl-serine/threonine. The product has important application in the field of polypeptide medicine.

The invention provides synthetic ester lubricating oil base oil with a high viscosity index and a preparation method thereof. The synthetic ester lubricating oil base oil is prepared by taking pyromellitic acid, triethanolamine, dihydroxy polyether, 1,10-decanediol, tetraethylene glycol, n-octanoic acid, cyclohexanecarboxylic acid and an organic solvent as main raw materials and carrying out sub-step esterification reaction. The synthetic ester lubricating oil base oil provided by the invention has a very high viscosity index and a relatively low pour point and the pour point can reach -45 DEGC; in a lubricating oil formula, a viscosity index modifier does not need to be additionally added and the requirements on high-viscosity lubricating oil can be met.

The invention relates to a thermal insulation board and a preparation method thereof. It is prepared from the following raw materials in parts by weight: 30 to 50 parts of phase change materials and 50 to 70 parts of plant fibers. Any one phase change material in calcium, n-octylic acid and butyl stearate; the plant fiber adopts crop straw, or rice straw, or asparagus, which can be obtained locally, and waste straw resources can be used to turn waste into Combining the energy storage characteristics of phase change materials to achieve energy saving and consumption reduction, the production has the advantages of fire and flame retardancy, light weight, high compressive strength, good energy saving effect, thermal insulation and sound insulation, non-toxic and harmless, and green environmental protection. .

The invention relates to a L-ascorbic acid octoate and a preparation method thereof. According to the invention, L-ascorbic acid octoate is dissolved in water, and has oil solubility, anti-oxidizability, emulsibility and bacteriostatic activity. The preparation method is characterized in that n-caprylic acid and L-ascorbic acid octoate are taken as raw materials, immobilized lipase in an organic phase system is used for a catalyzed esterification to synthesize L-ascorbic acid octoate, after the reaction is complete, a reaction solution is performed with steps of filtering, extracting, crystallizing or silica gel column chromatography, and drying under vacuum to obtain L-ascorbic acid octoate. The preparation method takes medium-chain fatty acid n-caprylic acid as a acyl donor, conversion rate being 80-90% can be obtained in a short reaction time, separating purifying is relatively simple, products purity is 95-98%, recovery rate is 75-85%, lipase reuse enables large frequency, enzyme activity can be kept by original 60-75% after 50-80 times of usage, production cost is reduced, and industrial production can be realized.

The present invention relates to a method for the preparation of (3S,4S)-3-hexyl-4-((R)-2-hydroxytridecyl)-oxetan-2-one and a product of the method. The method includes the following steps: a) reducing a substance represented by formula (II) to obtain a substance represented by formula (III), and then oxidizing the substance represented by formula (III) to form a substance represented by formula (IV); b) acylating n-octanoic acid to obtain n-octanoyl chloride using thionyl dichloride, then condensing the obtained n-octanoyl chloride with 2-mercapto-pyridine under basic condition to form a substance represented by formula (V), and then converting the substance represented by formula (V) to a substance represented by formula (VI); c) reacting the substance obtained in the step a) with the substance obtained in the step b) under catalytic condition of Lewis acid to generate a substance represented by formula (VII), and then reacting with a Lewis acid. The meanings of the signs in these formulas are the same as those in the description.

The invention provides a transdermic absorption patch, which is a transdermic absorption patch of fentanyl or citrate thereof and consists of a back lining layer, a medicinal preparation layer and a protective layer. The back lining layer is made of a material which cannot be permeated by medicament; the medicinal preparation layer comprises adhesive, polyethylene glycol mono-hexadecyl ether, n-octanoic acid and/or oleic acid, dodecylic acid diethanol amine and fentanyl or fentanyl citrate; and the protective layer is a film or paper which can be removed before the use, cannot be permeated by the medicament and has silicon polymer-covered surface. In the medicinal preparation layer, the weight ratio of the adhesive to the polyethylene glycol mono-hexadecyl ether to the n-octanoic acid and/or oleic acid to the dodecylic acid diethanol amine the fentanyl or fentanyl citrate is 100:1-10:1-10:1-5:3-15. The transdermic absorption patch can be well applied to skin, and the medicament fentanyl can be quantitatively absorbed by a human body through skin for a long time. Therefore, the transdermic absorption patch has durable, safe and effective analgesic effect.

The invention provides phase-change temperature-regulating asphalt and a preparation method thereof.The phase-change temperature-regulating asphalt is prepared from, by mass, (50-51) parts of tetradecane, (49-51) parts of n-caprylic acid, (15-22.5) parts of melamine, (45-67.5) parts of formaldehyde, (0.2-0.5) parts of polyvinyl alcohol, (0.5-1) parts of TiO2 nanoparticles, (0.2-0.5) parts of SDS and 93 parts of asphalt; the phase-change microcapsules are prepared from tetradecane and n-caprylic acid, and the phase-change material is changed from a liquid state to a solid state in a low-temperature environment and releases heat, so that the cooling rate of asphalt can be reduced to a certain extent, the aim of delaying or shortening the appearance and duration of extremely low temperature is fulfilled, and the low-temperature performance of the asphalt binder is improved.

The invention relates to the technical field of organic synthesis, and provides a preparation method of hexyl n-octanoate, which comprises the following steps: mixing n-caprylic acid, n-hexanol and tetrabutyl titanate, and carrying out esterification reaction to obtain the hexyl n-octanoate. According to the invention, the tetrabutyl titanate is used as a catalyst for the reaction, so that the selectivity of the product hexyl n-octoate is improved, and the yield of the hexyl n-octoate is improved; meanwhile, as the catalyst tetrabutyl titanate is almost non-corrosive, the corrosion of the catalyst to equipment in the preparation process is reduced. Experimental results show that by means of the preparation method, the yield of the hexyl n-octoate can reach 80% or above.

The invention provides a preparation method for a novel environment-friendly decorative material. The preparation method comprises the following steps: a, adding nanometer bentonite powder and nanometer titanium dioxide into a melting furnace, and carrying out baking so as to obtain a mixture I; b, adding the mixture I into deionized water, carrying out cold quenching to obtain solid particles, then carrying out grinding with a ball mill and drying, adding an acid solution of chitosan, polypropylene fibers, nanometer bamboo powder, n-octanoic acid, the extract of leaves of Pogostemon cablin and an adhesive into the obtained powder, and the carrying out stirring so as to obtain a material I; c , flatly spreading the material I on a non-woven fabric, and treating the non-woven fabric in a resistance furnace so as to obtain a material II; and d, subjecting the material II to compression molding while the material II is still hot, then carrying out cutting and shaping as needed, and successively carrying out grinding, polishing and trimming. The environment-friendly decorative material prepared in the invention has the advantages of high mechanical strength, high hardness and good heat resistance, bending resistance, corrosion resistance and abrasion resistance.

The invention discloses a method for preparing bromoxynil octanoate, which comprises the following steps: in a microchannel reaction device, reacting hydrogen peroxide water with hydrobromic acid to obtain bromine, and then reacting bromine with 4-hydroxybenzonitrile to obtain a bromoxynil crude product; in another micro-channel reaction device, the n-octanoic acid and thionyl chloride react to obtain capryloyl chloride, and then the capryloyl chloride and bromoxynil react to obtain the final product bromoxynil octanoate. Compared with the traditional preparation method of bromoxynil octanoate, the method disclosed by the invention has the advantages of two-step continuity, short reaction time, low cost, high yield, few byproducts, simplicity in operation, small amplification effect, high safety and suitability for industrial production.