912results about "Fatty acid esterification" patented technology

The present invention provides a method, application and product for preparing diglyceride with weight loss effect by enzymolysis, which belongs to the field of enzyme engineering technology. The method comprises the following steps: S1, mixing lipase, ammonium heptamolybdate tetrahydrate with water, adding glycerol precipitation, filtering, and obtaining an enzyme preparation; S2, mixing plant raw material oil, glycerol, fatty acid, sodium fatty acid with the enzyme preparation obtained in step S1, reacting under inert gas conditions, and obtaining an enzymolysate; S3, molecularly distilling the enzymolysate obtained in step S2 to obtain diglyceride; wherein the lipase is a mixture of Rhizomucor miehei lipase and Candida antarctica Aspergillus niger lipase. The present invention uses ammonium heptamolybdate tetrahydrate to load a specific lipase mixture, and at the same time optimizes the component types and ratios of the raw materials in the enzymolysis process, effectively improving the mass percentage content and diglyceride yield of enzymolysis production of diglyceride.

The invention discloses industrial-grade mixed oil produced by utilizing kitchen waste oil and a preparation method of the industrial-grade mixed oil, and belongs to the technical field of recycling of the kitchen waste oil. The invention relates to industrial-grade mixed oil produced by using kitchen waste oil and a preparation method thereof, and the preparation method comprises the following steps: firstly collecting kitchen waste containing the waste oil, and storing the kitchen waste in a container through special equipment; carrying out screen solid-liquid separation, cleaning grease on the surface of the solid waste, and then carrying out precipitation separation; then carrying out centrifugal separation, chemical cleaning, water washing, acid treatment, dehydration, degumming and metal ion removal on the separated grease and oil-containing liquid; carrying out ultrasonic-assisted multistage ester exchange after enzymolysis optimization, carrying out membrane separation on glycerol and fatty acid methyl ester, and carrying out reduced pressure distillation to obtain a high-purity fraction; carrying out adsorption refining, plasma treatment and supercritical fluid extraction; finally, nano particles are added and blended with additives, efficient recycling of the kitchen waste oil is achieved, and then high-purity industrial-grade mixed oil is prepared.

The invention relates to the technical field of grease chemistry, in particular to a preparation method and application of diglyceride oil capable of preventing and treating fatty liver. The preparation method comprises the following steps: (1) mixing raw material oil, water, glycerol and a lipase preparation for catalytic reaction to obtain a product 1; the raw material oil comprises 0.1-8 parts of sea buckthorn seed oil, 0.1-8 parts of acer truncatum seed oil, 60-90 parts of low erucic acid rapeseed oil, 15-35 parts of corn oil and 10-25 parts of peanut oil; the lipase preparation is aspergillus niger lipase and rhizopus niger lipase; (2) performing five-stage molecular distillation on the product 1 to obtain a product 2; and (3) decoloring and deodorizing the product 2 to obtain the product. The diglyceride oil prepared by the invention has excellent effects of preventing and treating fatty liver.

The invention discloses a molasses-based biomass sulfonated carbon catalyst preparation method, which comprises: grinding and mixing solid molasses and sodium hydroxide, calcining at 500-650 DEG C in an inert atmosphere to obtain activated carbon, and carrying out a sulfonation reaction on the activated carbon and concentrated sulfuric acid to obtain the catalyst. According to the method, by-product molasses in the sugar industry is taken as a raw material, a carbon source is rich in source, low in price and easy to obtain, the process is simple, the catalyst has relatively high specific surface area and conversion rate, the by-product can be utilized in a high-valued manner, and the method has certain industrial practical value.

The invention discloses a resource regeneration method of waste lubricating oil, relates to the technical field of petrochemical engineering, and belongs to the patent classification number C10M175 / 06. The preparation method comprises the following steps: adding a composite flocculant into the waste lubricating oil, heating and stirring, and then carrying out magnetic separation to obtain pretreated waste lubricating oil; uniformly mixing the pretreated waste lubricating oil, glycerol and a Ni / Al2O3 catalyst, then heating and reacting under pressure, and cooling to room temperature to obtain a catalytic hydrogenation product; and carrying out reduced pressure distillation on the catalytic hydrogenation product, recovering the lubricant base oil fraction, adding methanol and concentrated sulfuric acid into the distillation residual liquid, heating for esterification reaction, and separating the liquid to obtain the biodiesel. In the pretreatment process, the composite flocculant is used for removing acid and particle impurities in the lubricating oil, a traditional alkali adding neutralization precipitation process is replaced, the method is environmentally friendly, and the recovery cost of enterprises is reduced.

The invention relates to the technical field of grease processing, in particular to a preparation method for extracting refined vegetable oil fatty acid. A preparation method for refined vegetable oil fatty acid extraction comprises the following steps: vegetable oil refining treatment and refined vegetable oil fatty acid separation and extraction. In the vegetable oil refining treatment process, the degummed vegetable oil is subjected to deacidification and decolorization treatment by using the modified rice hull-based porous carbon, so that pigments, free fatty acids and heavy metal components in the vegetable oil can be efficiently adsorbed, the effects of adsorption, deacidification and decolorization are achieved at the same time, and the vegetable oil refining efficiency is effectively improved; vegetable oil refining quality is improved, so that the extraction effect of refined vegetable oil fatty acid is improved; in the separation and extraction process of fatty acid in the refined vegetable oil, the contact between urea and saturated fatty acid in the refined vegetable oil can be promoted by adding the crystallization inclusion additive, and a stably-clathrated composite crystal is quickly formed, so that the extraction purity of unsaturated fatty acid is improved.

The invention belongs to the field of light industry grease, and particularly relates to a preparation method and application of stable diglyceride oil. The method comprises the following steps: performing moderate glycerolysis on vegetable oil; crude diglyceride obtained through glycerolysis is firstly subjected to molecular distillation purification and then subjected to a fractionation modification process, and the diglyceride isomer composition is prepared by controlling the glycerolysis degree and the fractionation process. The oxidation stability of the hot-processing cooking oil is remarkably improved, and the production amount of risk factors is remarkably reduced.

The invention discloses a supported composite zinc catalyst and application thereof in biodiesel, and belongs to the technical field of catalyst preparation. The supported composite zinc catalyst provided by the invention comprises the following components: an AlPO4-SiO2 composite carrier, a zinc-cerium bimetallic active component supported on the carrier, and a hydrophobic modification layer coated outside the active component. The supported composite zinc catalyst has higher tolerance to moisture and free fatty acid in the waste grease, saponification side reaction is reduced, raw material pretreatment requirements are simplified, the catalyst is easy to recover and reuse, and production cost and environmental burden are remarkably reduced.

Processes for transesterifying wax esters. Implementations may include: providing a feedstock including wax esters, contacting the feedstock with a lipase, and catalytically transesterifying the wax esters in the feedstock with the lipase to form a transesterified product. An oxidative stability index (OSI) of the transesterified product may be greater than an OSI of the feedstock.

Processes for transesterifying wax esters. Implementations may include: providing a feedstock including wax esters, contacting the feedstock with a lipase, and catalytically transesterifying the wax esters in the feedstock with the lipase to form a transesterified product. An oxidative stability index (OSI) of the transesterified product may be greater than an OSI of the feedstock.

Disclosed are processes for producing an oil enriched with solubilized phytosterol esters and oils enriched with phytosterol esters produced thereby. Also disclosed is a process for the preparation of an oil / fat of high solid fat content comprising a mixture of solubilized phytosterol esters in oil obtained by enzymatically / chemically transesterified oil with phytosterols, and fully hydrogenated oil at different ratios. Further disclosed are fats enriched with phytosterol fatty acid esters, and stable oleogels comprising oil / s enriched with sterol fatty acid esters and protein(s), exhibiting high plasticity, and food products and supplements, cosmetic and pharmaceutical products comprising these fats and oleogels.

A composition is described comprising a mixture of at least one cetylated fatty acid or a mixture of cetylated fatty acids and an antioxidant in reduced percentages by weight, and related methods for treatment of arthritis and of inflammatory joint and musculoskeletal pain. Furthermore a composition is described comprising a mixture of at least one cetylated fatty acid or a mixture of cetylated fatty acids and, optionally, an antioxidant, and related treatment methods for protecting the gastric mucosa and for regulating the blood glucose levels. Additionally, a method is described for preparing the at least one cetylated fatty acid or mixture of cetylated fatty acids and for preparing compositions comprising the cetylated fatty acids and the antioxidant.

The invention belongs to the technical field of photo-thermal catalysis and biomass resource utilization, and particularly relates to a sulfonated biochar PC-SO3H-1 catalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: performing NaOH aqueous solution ultrasonic pretreatment, washing, drying and grinding on cellulose to obtain pretreated cellulose powder, uniformly dispersing the pretreated cellulose powder, p-toluenesulfonic acid and citric acid in deionized water, fully stirring at room temperature, then transferring the solution into a high-pressure reaction kettle, reacting, cooling, washing and drying to obtain the cellulose-p-toluenesulfonic acid / citric acid composite material. And grinding to obtain the PC-SO3H-1 photo-thermal catalytic material. The catalyst disclosed by the invention can be used for performing efficient photothermal conversion, so that the generation of biodiesel can be quickly catalyzed under the condition of room temperature.

The invention relates to the field of biodiesel catalytic materials, and particularly discloses a catalyst for kitchen waste oil, a preparation method and biodiesel. The catalyst for the kitchen waste oil is prepared from a Fe3O4-SiO2-Pr < 3 + > nano-particle carrier and a lipase solution, the catalyst is prepared from a Pr (NO3) 3 solution doped with Pr < 3 + > being 0.88-0.92 wt%, the lipase solution is a pseudomonas lipase solution with the concentration being 22-28 mg / mL, and the pH is 7.0; the preparation method comprises the following steps: preparing Fe3O4 nanospheres, coating the surfaces of the Fe3O4 nanospheres with SiO2 layers, dipping the Fe3O4 nanospheres in a Pr (NO3) 3 solution, carrying out calcination treatment to obtain a Fe3O4-SiO2-Pr < 3 + > nanoparticle carrier, placing the carrier in a lipase solution, carrying out adsorption fixation, and separating out the carrier to obtain the catalyst. The catalyst is used for processing biodiesel and has the advantages of being easy to recycle, high in loading capacity, low in activity loss and good in stability.

A method can include receiving an oxygenate sample, fractioning the oxygenate sample into one or more fractions, and separating the fractions (e.g. using FAME fractionation, FAEE fractionation, crystallization, solvent extraction, or other similar methods). The fractions can optionally be separated independently. The method can optionally include esterifying carboxylic acids separated from the fractions with glycerol and deodorizing the glycerides.

The invention relates to the technical field of rice bran processing, and discloses a rice bran degreasing and nutrition retention edible process synergistic treatment method which comprises the following steps: (a) in an NADES-aqueous solution medium, adding an immobilized catalyst A, and hydrolyzing ferulate bonds and phospholipids in rice bran at low temperature; (b) carrying out intermediate dehydration on the slurry obtained in the step (a) to reduce the water activity; (c) adding an immobilized catalyst B into the dehydrated slurry in the step (b), carrying out esterification reaction, and grafting free ferulic acid generated by hydrolysis to glyceride in situ; and (d) carrying out solid-liquid separation on the slurry obtained in the step (c) to obtain finished oil and finished powder. According to the method, an NADES medium is adopted to replace an organic solvent, the whole process is carried out at low temperature, degradation of heat-sensitive nutrient substances is avoided, and resource utilization of ferulic acid is achieved. The prepared functional rice bran oil is rich in feruloyl glyceride, total tocopherol and oryzanol, and is low in acid value and peroxide value.

The present invention provides a method, application and product for preparing diglyceride with weight loss effect by enzymolysis, which belongs to the field of enzyme engineering technology. The method comprises the following steps: S1, mixing lipase, ammonium heptamolybdate tetrahydrate with water, adding glycerol precipitation, filtering, and obtaining an enzyme preparation; S2, mixing plant raw material oil, glycerol, fatty acid, sodium fatty acid with the enzyme preparation obtained in step S1, reacting under inert gas conditions, and obtaining an enzymolysate; S3, molecularly distilling the enzymolysate obtained in step S2 to obtain diglyceride; wherein the lipase is a mixture of Rhizomucor miehei lipase and Candida antarctica Aspergillus niger lipase. The present invention uses ammonium heptamolybdate tetrahydrate to load a specific lipase mixture, and at the same time optimizes the component types and ratios of the raw materials in the enzymolysis process, effectively improving the mass percentage content and diglyceride yield of enzymolysis production of diglyceride.

The present disclosure provides for improved compositions of ionizable lipid nanoparticles for the delivery of therapeutic nucleic acids to cells. Cationic ionizable lipids are engineered with improved stability to oxidative degradation while in storage, while retaining high transfection activity or potency in cells. These lipids are designed to be biodegradable, thus improving the tolerability of nanoparticles formed with them in vivo. In addition, targeting of these nanoparticles in a highly specific manner to dendritic cells is provided for through inclusion of antibody conjugates directed against cell surface receptors.

The subject invention provides compositions and methods for reducing the carbon footprint of producing biofuels. Microbe-based soil treatment compositions are utilized to reduce greenhouse gas emissions resulting from the agricultural practices of producing feedstock crops.

The invention discloses coconut oil rich in diglyceride and a preparation method thereof, and belongs to the technical field of coconut oil deep processing, and the preparation method comprises the following steps: heating coconut oil and monoglyceride as substrates, adding Novozym 435 lipase as a catalyst, and carrying out a catalytic reaction at 40-80 DEG C to obtain the coconut oil rich in diglyceride. The coconut oil and the monoglyceride are used as main raw materials, and the Novozym 435 lipase is selected as a catalyst, so that the conversion efficiency of the diglyceride is improved, the content of the diglyceride in the coconut oil is greatly increased, the nutritional characteristics of the coconut oil are combined with the functional characteristics of the diglyceride, and the nutritional value of the coconut oil is further improved. Meanwhile, the preparation method provided by the invention is mild in reaction condition, low in energy consumption and good in reaction specificity.

The invention belongs to the technical field of shortening preparation, and particularly relates to shortening base oil with low calorie and high oxidation stability and a preparation method of the shortening base oil. According to the preparation method of the shortening base oil with low calorie and high oxidation stability, provided by the invention, the novel shortening base oil with high oxidation stability, zero trans form, low cholesterol and low calorie is produced by taking palm stearin, cyperus esculentus oil and medium-carbon-chain triacylglycerol oil as raw materials and taking immobilized lipase Lipozyme RMIM as a catalyst; the problems that existing shortening is poor in oxidation stability, high in cholesterol content, excessive in trans-fatty acid content and high in long-carbon-chain saturated fatty acid content can be solved, and the low-calorie high-nutrition high-quality shortening has extremely wide application prospects in the field of preparation of low-calorie high-nutrition high-quality shortening.

The present invention addresses the problem of providing: an oil or fat for chocolates, which has bloom resistance at a level similar to conventional CBE, and in which the change in viscosity in a tempering process is small; and a chocolate using the oil or fat.　The present invention preferably addresses the problem of further providing: an oil or fat for chocolates, which has good tempering properties under wide range of tempering conditions; and a chocolate using the oil or fat.　The problems can be solved by an oil or fat for chocolates, which satisfies all of requirements (A)-(D).　(A): The St2O triglyceride content is 10-50 wt%. (B): The ratio of the StStO triglyceride content to the St2O triglyceride content is at most 10 wt%. (C): The P2O triglyceride content is at least 3 wt%. (D): The ratio of the PPO triglyceride content to the P2O triglyceride content is at least 23 wt%.

A composition is described comprising a mixture of at least one cetylated fatty acid or a mixture of cetylated fatty acids and an antioxidant in reduced percentages by weight, and related methods for treatment of arthritis and of inflammatory joint and musculoskeletal pain. Furthermore a composition is described comprising a mixture of at least one cetylated fatty acid or a mixture of cetylated fatty acids and, optionally, an antioxidant, and related treatment methods for protecting the gastric mucosa and for regulating the blood glucose levels. Additionally, a method is described for preparing the at least one cetylated fatty acid or mixture of cetylated fatty acids and for preparing compositions comprising the cetylated fatty acids and the antioxidant.

The invention relates to the technical field of catalysts, and particularly discloses a Ni-Cu-CeO2 / ZrO catalyst for improving oxidation stability of biodiesel and a preparation method of the Ni-Cu-CeO2 / ZrO catalyst. The invention discloses a Ni-Cu-CeO2 / ZrO catalyst for improving oxidation stability of biodiesel. The Ni-Cu-CeO2 / ZrO catalyst comprises a carrier, an active component and an auxiliary agent, the carrier is a CeO2-ZrO2 composite oxide; the active components are Ni and Cu; ni accounts for 3-5 wt% of the mass of the catalyst, and Cu accounts for 1-3 wt% of the mass of the catalyst; the auxiliary agent is La2O3; the preparation method comprises the following steps: firstly preparing the CeO2-ZrO2 carrier by adopting a coprecipitation method, then impregnating nickel nitrate, copper nitrate and lanthanum nitrate in an isopyknic manner, and then carrying out stepped roasting to obtain the catalyst. The catalyst has high catalytic activity and stability, unsaturated fatty acid ester in biodiesel can be removed, the oxidation stability of the biodiesel is improved, and the cost of the catalyst is lower than that of a noble metal catalyst.

The present disclosure describes microbial oil compositions that can include a biomass present in a culture medium. The biomass can include a microbial oil enriched in EPA. The present disclosure also describes methods of producing microbial oils enriched in EPA. The present disclosure also describes nutritional oil compositions including the microbial oils and nutritional oil concentrates prepared from the nutritional oil compositions or microbial oils.

The present invention provides a wax formulation that includes about 5 weight percent (wt %) to about 85 wt % of a natural oil-based petrolatum composition based on total weight of the wax formulation; and about 1 wt % to about 95 wt % of a wax material based on total weight of the wax formulation; wherein the natural oil-based petrolatum composition a triglyceride component containing a plurality of hydroxyl containing fatty acid chains and wherein a plurality of the hydroxyl containing fatty acid chains are esterified with a C8-C22 branched or straight chain fatty acid and wherein the natural oil-based petrolatum composition has a drop melting point measured by AOCS Standard Procedure Cc 18-80 of between 35 and 70° C.

The invention relates to the technical field of catalysis, and particularly discloses a method for preparing pure biodiesel from kitchen waste oil through enzyme catalytic desulfurization. The method comprises the following steps: adding a Sm2O3 / ZrO2 solid acid catalyst into the kitchen waste oil for pretreatment to obtain pretreated waste oil, and then adding lipase into the pretreated waste oil for catalyzing transesterification to obtain the biodiesel. According to the method for preparing the pure biodiesel from the kitchen waste oil through enzyme catalytic desulfurization, in-situ esterification and synchronous desulfurization of free fatty acid can be completed in a single-step reaction, the stability of a conversion reaction is effectively improved, the production process is simplified, and the conversion efficiency of preparing the biodiesel from the kitchen waste oil is improved.

The invention relates to the technical field of chemical production, and discloses an isooctyl stearate continuous production device and method based on a green catalyst, and the isooctyl stearate continuous production device based on the green catalyst comprises a feeding mechanism, a preheating mechanism, a reactor and a separation mechanism, the reactor comprises a reaction kettle and a catalytic bed, the catalytic bed is arranged in the reaction kettle, a material distributing mechanism, a stirring mechanism, a driving mechanism and a linkage mechanism are arranged in the reaction kettle, and a first temperature sensor and a second temperature sensor are fixedly installed on the inner wall of the reaction kettle. The reaction kettle is reasonable in design, raw materials can be preheated through the arranged preheating mechanism, the temperatures of different positions in the reaction kettle can be monitored through the arranged material distributing mechanism, stirring mechanism, linkage mechanism and driving mechanism, the stirring speed and the feeding rate are adjusted in real time, it is ensured that the reaction is conducted in a relatively stable temperature environment, and the reaction efficiency is improved. Therefore, the purity and quality of the product are improved.

The invention relates to the field of medium-long-chain triglyceride, and particularly discloses medium-long-carbon-chain triglyceride edible oil and a preparation method thereof. The preparation method of the medium-long carbon chain triglyceride edible oil comprises the following steps: carrying out reaction activation on sialic acid and an oxidizing agent to obtain an activated sialic acid derivative, adding the activated sialic acid derivative and lipase into a phosphate buffer solution, carrying out stirring reaction at 4 DEG C for 12-24 hours, then adding sorbitan monooleate, carrying out stirring reaction at 30-40 DEG C for 20-40 minutes, and carrying out centrifugation to obtain the medium-long carbon chain triglyceride edible oil. Freezing and drying to obtain the functionalized lipase; and adding purple perilla seed oil, medium-chain triglyceride and the functionalized lipase into a reaction kettle for reaction, removing free fatty acid in a crude product by using a molecular distillation technology, and extracting and purifying by using ethanol to obtain the medium-chain and long-chain triglyceride edible oil. The medium-long carbon chain triglyceride edible oil has the advantages of being high in yield, rich in alpha-linolenic acid and high in nutritive value.

The invention relates to an environment-friendly degradable gear lubricant as well as a preparation method and application thereof, in particular to an environment-friendly degradable gear lubricant which is prepared from the following components in percentage by weight: 50-60% of base oil, 15-25% of an additive, 23-38% of modified castor oil, 5-10% of an antioxidant and 5-8% of a tackifier, the base oil is prepared from pentaerythritol ester, butylene adipate, butylene terephthalate and a catalyst, and the mass ratio of the pentaerythritol ester to the butylene adipate to the butylene terephthalate is (1.2 to 2.5) to (3.1 to 4.5) to (2 to 3). The vegetable oil biological lubricant can ensure environmental friendliness and degradability while realizing lubrication, and has all characteristics required by lubricating oil, including high viscosity index, low volatility and good lubricity.