21 results about "Mixed fatty acid" patented technology

The invention relates to the technical field of separation and purification, in particular to a method for recovering cis-15-tetracosenoic acid from an acer truncatum seed oil byproduct, which comprises the following steps: selecting the acer truncatum seed oil byproduct, crushing, sieving, washing, adding modified attapulgite and beta-cyclodextrin, stirring and adsorbing at constant temperature, and filtering; preparing the modified attapulgite; adding a KOH-EtOH solution containing lipase and polyethylene glycol into a pretreated product for refluxing, and adding a saturated saline solution for refluxing; standing and layering the reaction liquid, and extracting, acidifying, washing, drying and distilling an organic phase to obtain mixed fatty acid; and carrying out composite purification to obtain a pure cis-15-tetracosenoic acid product. According to the method, the purity and the extraction rate of the cis-15-tetracosenoic acid are remarkably improved, the oxidation, heat and storage stability of the product is enhanced, the color is improved, and the comprehensive application performance is better.

The invention relates to the technical field of pharmaceutical preparations, and particularly discloses an anti-inflammatory analgesic indometacin long-acting suppository and a preparation method thereof.The suppository is composed of indometacin sustained-release microspheres and a modified fatty matrix; eudragit RS100 / RL100 is used as a compound framework of the sustained-release microspheres, the sustained-release microspheres are prepared through a spherocrystal granulation process, the modified fatty matrix is prepared from a mixed fatty glyceride compound matrix sustained-release aid, a three-dimensional suspending dispersant and the like through melting, pre-crystallization and high-speed homogenization processes, and the three-dimensional suspending dispersant contains modified nano silicon dioxide, glycerin monostearate and beewax. According to the invention, a microsphere-matrix dual controlled release system is constructed, so that burst release of drugs is eliminated, and long-acting stable release is realized; the microspheres are prevented from settling and agglomerating through a physical locking mechanism, and the storage stability of the preparation is improved by matching with a dual anti-oxidation system; meanwhile, rectal mucosa stimulation is reduced, the preparation process is simple, the quality is controllable, and the composition is suitable for anti-inflammation and analgesia of various diseases and has a wide clinical application prospect.

The present application relates to a kind of coal slime collector preparation method using kitchen waste oil, comprising the kitchen waste oil after being pretreated with water, emulsifier is mixed, as carbon source configuration first culture medium, Bacillus and Rhodococcus species are inoculated in it and carry out aerobic fermentation, obtain refined oil, and as carbon source configuration second culture medium, Candida species are inoculated in it and carry out aerobic fermentation, obtain mixed fatty acid, and as carbon source configuration third culture medium, Yarrowia species are inoculated in it and carry out micro-aerobic fermentation, obtain alkane mixture;Emulsified oil and / or refined oil are as carbon source configuration fourth culture medium, Pseudomonas species are inoculated in it and carry out aerobic fermentation, obtain rhamnolipid;Alkane mixture is mixed with rhamnolipid, obtain coal slime collector.The present application develops a new type of green, good coal slime collector by constructing multistage series biological transformation process.

The invention relates to the field of wood modification, in particular to modified wood and a modification method thereof. The method comprises the following steps: (1) drying wood to be modified to constant weight to obtain dried wood; (2) the dried wood is placed in steeping liquor to be treated, and steeped wood is obtained; the steeping liquor comprises any one of steeping liquor I and steeping liquor II; the impregnation liquid I comprises silicate and organic acid I; the impregnation liquid II comprises organic acid II, mixed fatty acid methyl ester and wax. On the premise of ensuring simple operation steps, the porosity of the wood can be reduced, and the dimensional stability, high humidity resistance and salt resistance of the wood can be improved.

The invention relates to the technical field of enzymatic preparation of grease, in particular to a method for enzymatic preparation of special grease for infant formula milk powder, which comprises the following steps: constructing a pH response type interface biocatalysis system, and synthesizing and enriching functional ester; the preparation method comprises the following steps: preparing an sn-2 palmitic acid diglyceride intermediate based on alcoholysis reaction, and reacting the sn-2 palmitic acid diglyceride intermediate with mixed fatty acid to synthesize the composite structure lipid; and preparing the target mixed grease from the functional ester, the composite structure grease and the fat-soluble vitamin by adopting a low-temperature high-speed shearing and homogenizing technology. According to the method for preparing the grease special for the infant formula milk powder through the enzyme method, pH response type magnetic nano immobilized lipase is prepared, the enzyme activity is controllable, and the grease is recycled and reused through the dual mechanisms of magnetic separation and pH induced aggregation; a fat-soluble vitamin-structural fat-essential fatty acid composite synergistic system is constructed, the functions of energy supply, mineral absorption and micronutrient supplementation are achieved, and a target grease product is purified by adopting a multi-stage molecular distillation step.

The invention provides pentaerythritol ester and a preparation method thereof. The preparation method comprises the following steps: mixing mixed fatty acid and pentaerythritol according to the molar ratio of carboxyl to hydroxyl of (1-1.5): 1, irradiating by using ultraviolet light under 0.01-0.09 MPa, and carrying out esterification reaction under the condition of ultrasonic treatment to obtain pentaerythritol ester; wherein the mixed fatty acid comprises monobasic fatty acid and dibasic fatty acid, the monobasic fatty acid is at least two of C5-C10 monobasic fatty acid, and the dibasic fatty acid is at least one of C5-C9 dibasic fatty acid. According to the preparation method, the reaction esterification rate can be remarkably increased, the reaction time is shortened, the process is simple, and the large-scale application prospect is good.

The application provides a hard-bubble high-flame-retardant phase change polyurethane material and a preparation method thereof, and belongs to the technical field of building materials. The preparation method is mixing polyether polyol, calcium carbonate, a gel phase change material, a catalyst, a foaming agent, a foam stabilizer, a plasticizer, a chain extender, ammonium polyphosphate, an antioxidant DNP and an ultraviolet absorber, then adding isocyanate, rapidly stirring, freely foaming, and aging to obtain the hard-bubble high-flame-retardant phase change polyurethane material. The gel phase change material is prepared by using mixed fatty acid formed by mixing myristic acid and octadecanoic acid as core material, using sodium silicate and tetraethyl silicate as aerogel wall material, using the hydrophobic end of an emulsifier to include the core material, and using the hydrophilic end of the emulsifier to combine with the aerogel wall material. The application effectively reduces the thermal conductivity of the prepared hard-bubble high-flame-retardant phase change polyurethane material, reduces heat loss caused by heat transfer, and improves temperature adjustment and control capacity.

The invention relates to a method for preparing high-purity oleic acid from tea oil based on coupling of a molecular distillation technology and a urea embedding technology in the technical field of deep processing of edible oil and fat. The method comprises the following steps: firstly, microfiltering the tea oil by using a 0.1-0.5 mu m membrane to remove impurities; then preparing mixed fatty acid; mixing the mixed fatty acid with a urea-ethanol solution according to the ratio of fatty acid to urea being 1: (1.2-1.8), stirring at 45-50 DEG C for 2-3 hours, cooling to-15 to-5 DEG C, crystallizing for 1-14 hours, separating and taking a liquid phase; and finally, treating the liquid phase by a wiped-film molecular distillation system to obtain high-purity oleic acid. According to the method, oleic acid enrichment is achieved, and meanwhile a large amount of heat-sensitive active ingredients are effectively prevented from being oxidized and decomposed.

The invention discloses a modified palm oil polyol, a preparation method thereof and a polyurethane structural adhesive, and belongs to the field of polymer chemistry, the preparation method comprises the following steps: (1) performing saponification reaction on palm oil by using alkali liquor to obtain mixed fatty acid salt; (2) carrying out acidification reaction on the fatty acid salt crude product by utilizing acid liquor to obtain mixed fatty acid; (3) mixing the mixed fatty acid with micromolecular polyol for esterification reaction to obtain palm oil-based polyol ester; and (4) performing epoxidation reaction on the palm oil-based polyol ester to obtain the modified palm oil polyol, and the modified palm oil polyol obtained by the preparation method provided by the invention can endow the polyurethane structural adhesive with the advantages of low viscosity, low hardness and high bonding strength.

The invention belongs to the technical field of pentaerythritol fatty acid ester synthesis, and particularly relates to pentaerythritol mixed fatty acid ester as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing pentaerythritol, fatty acid, a catalyst and a water-carrying agent, and carrying out esterification reaction to obtain esterification reaction liquid; carrying out purification treatment on the esterification reaction liquid to obtain pentaerythritol mixed fatty acid ester; the fatty acid comprises n-heptanoic acid, n-octanoic acid and 3, 5, 5-trimethyl hexanoic acid, and the molar ratio of the n-heptanoic acid to the n-octanoic acid to the 3, 5, 5-trimethyl hexanoic acid is (1-8): (1-8): 2. According to the invention, acid raw materials for esterification reaction are reasonably selected to react with pentaerythritol, and meanwhile, the molar ratio of three fatty acids is regulated and controlled, so that the obtained pentaerythritol mixed fatty acid ester has the characteristics of low viscosity and high ignition point, thereby having excellent low-temperature fluidity and high-temperature stability; meanwhile, the pentaerythritol mixed fatty acid ester provided by the invention also has excellent electrical performance.

The invention provides a coating method and application of a hydroxy fatty acid-containing compound fertilizer. Comprising the following steps: preparing a solution from a mixture of medium-chain potassium 3-hydroxyaliphatate, long-chain potassium aliphatate and sodium alginate, and spraying the solution on the surfaces of compound fertilizer particles to form a pre-coating layer; then spraying a metal salt solution containing CaCl2 or MgCl2, reacting and drying under the condition of 40-60 DEG C, so that the mixed potassium aliphatate is converted into Ca / Mg metal soap in situ on the surfaces of the particles, thereby forming a hydrophobic metal soap film layer. The obtained film layer is insoluble in the initial stage, is resistant to water corrosion and can effectively delay dissolution of nutritional ingredients in the compound fertilizer; after application, the metal soap film is exposed in a microorganism or CO2 environment, and the metal soap film is gradually degraded, so that the controlled release of the fertilizer and the coating film layer is realized. The method is convenient to use and suitable for large-scale production of the compound fertilizer. Medium-chain 3-hydroxy fatty acid has a unique effect of promoting growth of underground rhizomes, and the fatty acid metal soap coated compound fertilizer can be used for promoting growth of underground rhizome crops so as to achieve the purpose of increasing production and income.

This invention discloses a trimethylolpropane mixed fatty acid ester, its preparation method, and its applications. The mixed fatty acid ester is obtained by esterification of two or more fatty acids with trimethylolpropane. The fatty acids are selected from combinations of octanoic acid, decanoic acid, and oleic acid, or combinations of oleic acid with octanoic acid or decanoic acid. The mixed fatty acid ester of this invention possesses both a high flash point and a low pour point, while maintaining low viscosity at low temperatures. It also exhibits excellent dielectric properties, meeting the various requirements of electrical equipment for insulating media. Furthermore, this mixed fatty acid ester uses renewable fatty acids as raw materials, has good biodegradability, aligns with the trend of green and environmentally friendly development, and avoids the environmental pollution problems caused by traditional mineral insulating oils and some synthetic insulating oils. It has broad application prospects in power equipment such as transformers and capacitors.

The application provides a preparation method of medium-chain triglyceride, related products and application, and relates to the technical field of oil manufacturing. The preparation method comprises the following steps: mixing anhydrous calcium hydrogen phosphate, hydroxyapatite, carboxymethyl chitosan, Candida rugosa lipase and water, stirring, ultrasonic treatment, centrifugation, and obtaining immobilized lipase; then, the immobilized lipase is used for enzymolysis reaction with coconut oil and / or palm kernel oil to obtain mixed fatty acids; and then, catalyzing esterification reaction between the mixed fatty acids and glycerol to obtain medium-chain triglyceride. Through adjusting the types and proportions of the components in the immobilized lipase, the hydrolysis selectivity of the lipase to medium-chain fatty acids is improved, and then the yield of the medium-chain triglyceride is improved.

The invention discloses a method for efficiently preparing arachidic acid and behenic acid by adsorbing and decontaminating raw materials through bio-based calcium oxide, and relates to the field of grease chemical engineering, the method comprises the following steps: S1, high-erucic acid rapeseed oil raw materials are subjected to decontaminating treatment through an adsorption column filled with bio-based calcium oxide, and the bio-based calcium oxide is prepared by calcining aquatic organism shells; s2, carrying out acidic hydrolysis on the impurity-removed raw material to obtain mixed fatty acid; according to the method for efficiently preparing the arachidic acid and the behenic acid by adsorbing and removing impurities from the raw materials through the bio-based calcium oxide, the bio-based calcium oxide is prepared from waste shells, high-value utilization of waste is achieved, and the cost is low. The material has a high specific surface area and abundant mesopores, and shows a selective adsorption capacity far higher than that of common calcium oxide on polar impurities such as thioglycoside and colloid, the removal rate can reach 88% or above, and the purity of the raw materials is guaranteed from the source.

The application belongs to the field of separation and purification, and provides a continuous separation and purification device and method for oil methyl esterification reaction liquid based on super-hydrophobic PVDF membrane. The device comprises a super-hydrophobic separation membrane, a separation cavity, an oil outlet cavity, a magnetic attraction assembly and an oil collection tank. The super-hydrophobic separation membrane, the separation cavity and the oil outlet cavity are clamped by the magnetic attraction force of the magnetic attraction assembly; after the acidic oil methyl esterification reaction liquid is poured into the separation cavity, the mixed fatty acid methyl ester in the mixed methyl esterification reaction liquid is separated and purified by the super-hydrophobic porous PVDF membrane; in order to prevent the separation membrane from being damaged due to excessive oil pressure, the upper liquid is discharged into the oil inlet cavity through the oil discharge port, and then is circulated into the separation cavity through the external pipeline; the lower liquid continues to be separated and purified by the super-hydrophobic separation membrane, so that the continuous and rapid separation and purification of the acidic oil methyl esterification reaction liquid are realized.

The invention belongs to the technical field of medicines, and particularly relates to a troxerutin suppository and a preparation method thereof. The invention provides a troxerutin suppository. The troxerutin suppository is prepared from the following raw materials in percentage by mass: 20-40% of troxerutin, 25-35% of cocoa butter and 35-45% of mixed fatty glyceride. According to the troxerutin suppository, the cocoa butter and the mixed fatty glyceride are adopted as auxiliary materials of the suppository, meanwhile, the cocoa butter and the mixed fatty glyceride are optimized to be matched with the troxerutin in a proper mass ratio, the obtained troxerutin suppository has good stability, and the release degree meets the standard. Meanwhile, the troxerutin suppository provided by the invention can realize rectal administration, reduces gastrointestinal irritation, is long in acting time, improves bioavailability, is suitable for patients who cannot take orally or are difficult to take orally, and improves drug compliance.

The invention provides a preparation method of a foaming material, the foaming material and refrigeration equipment, and the preparation method of the foaming material comprises the following steps: mixing epoxy fatty glyceride and hydroxyl functionalized ionic liquid to obtain mixed fatty glyceride; mixing the mixed fatty glyceride with a polyol cross-linking agent to obtain composite polyol; and mixing the composite polyol, the polyether polyol, the composite foaming agent, isocyanate and the auxiliary agent, and foaming to obtain the foaming material. The hydroxyl functionalized ionic liquid can promote the compatibility degree between different phases, improve the layering phenomenon after compounding of different materials, and improve the cell density of the foaming material.

This invention discloses a method for preparing ceramide 3 by acylation catalyzed by a composite microbial enzyme. The method uses plant sphingosine and mixed long-chain fatty acids as raw materials, and a binary composite microbial lipase with *Candida albicans* lipase as the main enzyme and *Aspergillus oryzae* / *Rhizopus oryzae* lipase as the coenzyme as the catalyst. The enzyme-catalyzed acylation reaction is followed by filtration, vacuum distillation, recrystallization, and drying to obtain the final product. This invention's composite enzyme system achieves highly efficient synergistic catalysis of the mixed fatty acid substrate, resulting in a ceramide 3 yield ≥90%, total purity ≥93%, and oleic acid-based ceramide 3 as the main component ≥85%. The distribution of minor components closely matches that of natural ceramides. The reaction conditions are mild, with no chemical residues. The composite enzyme is recyclable and reusable. The preparation process is simple, has high tolerance for error, and is easily scaled up industrially. The product can be widely used in the pharmaceutical and cosmetic fields.

The invention discloses synthetic ester insulating oil based on alkyl chain length grading and star-comb composite branching cooperative regulation and a preparation method, and relates to the technical field of electrical equipment insulating materials. The preparation method comprises the following steps: esterifying polyhydric alcohol and C8-C12 gradient mixed fatty acid to obtain a gradient main chain ester intermediate; performing vacuum grafting on the intermediate and branched chain acid to obtain star branched ester; carrying out ester exchange on the star-shaped branched ester and branched-chain alcohol to obtain star-shaped-comb-shaped composite branched ester; and compounding the composite branched ester with an additive to obtain a finished product. The insulating oil solves the problem that low pour point and low-temperature viscosity of a traditional oil product cannot be considered at the same time, extremely low-temperature adaptability, insulating performance and thermal stability are improved, the insulating oil is adaptive to alpine regions and direct-current power transmission equipment, raw materials are easy to obtain, the process is environment-friendly, traditional mineral insulating oil can be replaced, and the cost is low. And a key technical support is provided for stable operation of power equipment in an extreme environment.

This application provides a bio-based polyol and its preparation method, a polyurethane composition, a polyurethane foam, and a refrigeration device. The preparation method of the bio-based polyol includes the following steps: subjecting vegetable oil to alcoholysis to obtain a mixed fatty acid ester; subjecting the mixed fatty acid ester to epoxidation to obtain an epoxy fatty acid ester; subjecting the epoxy fatty acid ester to a ring-opening reaction to obtain a hydroxy fatty acid ester; and in-situ composited with silane-modified nano-aerogel to obtain the bio-based polyol. This application, by introducing silane-modified nano-aerogel into the bio-based polyol for in-situ composite formation, can utilize the low thermal conductivity and high specific surface area of ​​the silane-modified nano-aerogel to synergistically reduce the thermal conductivity of the polyurethane foam.

According to one aspect of the present application, a method for controlling solid content of vanadium-removing slurry is provided, comprising the following steps: adding high-vanadium titanium tetrachloride into a vanadium-removing reactor; adding mixed fatty acid into the vanadium-removing reactor; calculating the discharge amount of vanadium-removing slurry; and controlling the discharge of vanadium-removing slurry from the vanadium-removing reactor according to the calculation result. Through the above-mentioned method for controlling solid content of vanadium-removing slurry, the solid content of vanadium-removing slurry is controlled to fluctuate slightly within the process requirement range by establishing a slurry discharge control model, the first pass yield of refined titanium is improved, the comprehensive utilization of Panxi titanium resources is greatly promoted, and key technical support is provided for large-scale development and utilization of high-titanium blast furnace slag.