78 results about "ON-glycerol" patented technology

The invention discloses a preparation method of 1,3-dioleoyl-2-palmitoyl triglyceride, which comprises the following steps: carrying out esterification reaction on glycerol and palmitinic acid under the action of a catalyst to obtain tripalmitin; carrying out ester exchange reaction on the tripalmitin and oleic acid or oleate under the action of 1,3-specific lipase until the ester exchange rate reaches 30-60%, and removing free fatty acids or fatty acid esters in the reaction system; and adding oleic acid or oleate into the reaction system, continuing the reaction until the ester exchange rate reaches 60-90%, and separating and purifying the 1,3-dioleoyl-2-palmitoyl triglyceride from the reaction products. The method disclosed by the invention has the advantages of wide raw material sources, high economy, high safety, mild technological conditions, short reaction time, low energy consumption and low enzyme consumption; and the method can be used for preparing high-yield high-purity 1,3-dioleoyl-2-palmitoyl triglyceride, and can be used as a food nutrient reinforcer for blending infant formula milk powder.

The invention relates to the technical field of lactic acid preparation and particularly relates to a method for preparing lactic acid through catalyzing glycerol by nano copper. According to the method provided by the invention, reaction is carried out on glycerol which serves as a raw material for 0.5-4 hours in a high-pressure reactor at the temperature of 150-230 DEG C under anaerobic alkaline conditions in the presence of nano copper, thereby obtaining lactic acid. The method has the advantages that the reaction temperature and reaction pressure are low, the catalyst activity is high, the selectivity is good, the reaction rate is high, the process flow is safe and environmental-friendly, and the like, so that the industrial prospect is good.

The invention discloses organic phosphaphenanthrene derivatives, and a preparation method and application thereof. The structural formula of the organic phosphaphenanthrene derivatives is disclosed as Formula I, wherein the group disclosed as Formula II is from carboxylic acid derivatives or acyl chloride derivatives, the group A is from organic phosphaphenanthrene compounds, and the group A is connected with the group disclosed as Formula II through a P-C bond. The preparation method of the organic phosphaphenanthrene derivatives comprises the following steps: carrying out esterification reaction on glycerol and carboxylic acid derivatives or acyl chloride derivatives to obtain glycerol ester derivatives; and under the action of a catalyst, carrying out reaction on the glycerol ester derivatives and organic phosphaphenanthrene compounds. The organic phosphaphenanthrene derivatives can enhance the flame retardancy of the polymer, and can enhance the flame retardancy of the prepared material when being added as a functional aid for preparing high-polarity engineering plastics of PET (polyethylene terephthalate), PBT (polybutylene terephthalate) and other polyesters and PA6 (polyamide 6), PA66 (polyamide 66) and other polyamides.

The invention relates to the technical field of lactic acid preparation and particularly relates to a method for preparing lactic acid through catalyzing glycerol by a supported copper catalyst. According to the method, the selectivity of lactic acid can reach 70-90%, and the conversion ratio of glycerol can reach 72-100%. The method is characterized in that reaction is carried out on glycerol which serves as a raw material in a high-pressure reactor under anaerobic and alkali source provided alkaline conditions in the presence of supported copper oxide which serves as a catalyst, thereby obtaining lactic acid, wherein a support of the supported copper oxide catalyst contains metal oxides, including MgO, ZrO2, TiO2, CeO2 and ZnO, activated charcoal or hydroxyapatite; the supported copper catalyst is easy to prepare, low in cost and relatively long in service life. The method has the advantages that the reaction temperature and reaction pressure are low, the catalyst activity is high, the selectivity is good, the reaction rate is high, and the process flow is safe and environmental-friendly and the like, so that the industrial prospect is good.

The invention relates to the technical field of lactic acid preparation and particularly relates to a method for preparing lactic acid through catalyzing glycerol by a supported catalyst. According to the method, the selectivity of lactic acid can reach 70-90%, and the conversion ratio of glycerol can reach 72-100%. The method is characterized in that reaction is carried out on glycerol which serves as a raw material in a high-pressure reactor under anaerobic and alkali source provided alkaline conditions in the presence of supported copper oxide which serves as a catalyst, thereby obtaining lactic acid, wherein a support of the supported copper oxide catalyst contains metal oxides, including MgO, ZrO2, TiO2, CeO2 and ZnO, activated charcoal or hydroxyapatite; the supported copper oxide catalyst is easy to prepare, low in cost and relatively long in service life. The method has the advantages that the reaction temperature and reaction pressure are low, the catalyst activity is high, the selectivity is good, the reaction rate is high, and the process flow is safe and environmental-friendly and the like, so that the industrial prospect is good.

The invention relates to synthesis and application of a polyester titanium catalyst. The synthesis of the polyester titanium catalyst comprises grinding monohydric alcohol, para-toluene sulfonyl chloride and inorganic base 1 in a mortar to obtain a product A; performing stirring reaction on glycerol acetonide, inorganic base 2, the product A and phase transfer catalyst to obtain a product B; hydrolyzing the product B under acidic conditions to obtain a product C; reacting the product C with titanium tetrachloride and performing neutralization and reduced pressure distillation to obtain the polyester titanium catalyst I. The invention also relates to application condition optimization of the polyester titanium catalyst I during polyester synthesis. The synthesis and application of the polyester titanium catalyst has the advantages that (1) the obtained polyester titanium catalyst contains no heavy metal during the entire process from preparation to application and is free from toxicity and damage; (2) the polyester titanium catalyst is higher in activity compared with ordinary titanium catalysts, thereby being little in consumption and residue and low in influence of subsequent polyester processing; (3) polyesters prepared through the polyester titanium catalyst saves additional dyes, namely, can reach a relatively low b value and accordingly can be applied to fields such as chemical fiber fabric and food bottles.

The invention discloses a method for synthesizing a phytosterol ester in presence of a biological enzyme catalyst by using supercritical CO2 as a solvent. The invention relates to a reaction method for use in synthesis of the phytosterol ester by the ester exchange of grease and phytosterol. The method comprises the following steps: I, preparing reactants; II, introducing CO2 to detect leakage; III, regulating temperature and stirring speed and performing a reaction; and IV, centrifuging the reaction product to obtain the phytosterol ester. As the solubility the reactants increases in the supercritical CO2 fluid, the solubility of lipase and the solubility of phytosterol in vegetable oil increase respectively. The enzyme can act on glycerol triester sn-3 position fatty acid easily, the fatty acid and diglyceride, which are obtained by enzymolysis, react with the phytosterol respectively to form phytosteryl fatty acid ester and diacylglycerol sterol ester, no solvent is added, and the conversion rate of the obtained sterol ester is improved by over 5 percent compared with the conventional method.

The invention provides an anti-tumor predrug by taking novel amphipathic dendritic macromolecules as carriers based on glycerol as a branching unit and a preparation method thereof. The novel amphipathic dendritic macromolecules that are biodegradable are constructed based on glycerol and glycolic acid oligomer, lactic acid oligomer, glycolic acid and lactic acid alternative oligomer, glycolic acid, lactic acid and amino acid alternative oligomer, and copolymerization oligomer of all as well as polyethylene glycol or polyethylene glycol monomethyl ether; and the novel amphipathic dendritic macromolecules are in bonding reaction with anti-tumor medicines under the existence of a condensing agent, thereby obtaining the predrug of the anti-tumor medicines. The anti-tumor predrug improves the biocompatibility of medicinal carrier materials better, regulates and controls the degradation speed of the medicinal carrier materials in the human body by regulating the polymerization degree and the chemical compositions of oligomer simultaneously, realizes the regulation and control functions to release speed of medicines, has better medicinal slowly-controlled release function and avoids causing toxic and side effects to normal cells due to burst release of anti-tumor medicines.

The invention provides a core-shell type catalyst for preparing lactic acid and pyruvic acid by carrying out catalytic selective oxidation on glycerol. The core layer of the catalyst is a metal oxide, the shell layer of the catalyst is wrapped by metal, and reduction treatment is then carried out, so that the core-shell type nano-metal catalyst is obtained. The core layer of the catalyst is the metal oxide selected from TiO2, CeO2, ZrO2, MgO or the like, and the shell layer is a composition prepared from one or more precious metals in active metals such as Pt, Au or Pd and auxiliary active metal Pb. The core-shell type catalyst is used in a reaction for preparing the lactic acid and the pyruvic acid by taking a glycerol water solution as a raw material and molecular oxygen as an oxidizing agent; the glycerol conversion rate is 60.6%, the lactic acid selectivity is 48.7%, and the pyruvic acid selectivity is 25.3%. A preparation method of the catalyst is simple, mild in reaction conditions and easy to operate; the catalyst can be recycled and has potential research and industrial application prospects.

The invention belongs to supercapacitors and in particular relates to a preparation method of a Pt-CeO2/porous polyaniline electrode material. Aiming at coping with the problem of energy shortage, a direct methanol fuel cell (DMFC) becomes a hotspot of researches and development; a Pt-based catalyst is an anode catalyst, which has the best effect, of a battery. However, the Pt-based catalyst has an expensive price and a carbon-containing intermediate, which easily poisons the Pt-based catalyst, is easy to generate. Conductive metal oxide and a conductive polymer are compounded with Pt, so thatthe dosage of the Pt can be reduced and the CO poisoning resisting capability is improved, and furthermore, the activity and stability of the Pt-based catalyst are improved. A chemical template method is mainly used for preparing porous polyaniline; the metal oxide is compounded with the porous polyaniline, and then Pt nanoparticles are deposited on a metal oxide/porous polyaniline composite material through an electrochemical deposition method. The composite material prepared by the preparation method is characterized to find out that the Pt-CeO2/porous polyaniline composite material has thebest catalytic oxidization effect on glycerol.

The invention relates to a synthetic method of polyglycerol-10 oleate. The synthetic method sequentially comprises the following steps: (1) carrying out polymerization reaction on glycerol under catalysis of a combined catalyst A to obtain polyglycerol-10, wherein the combined catalyst A is prepared from 5-55% of NaOH, 5-55% of KOH, 5-15% of MgO and 5-25% of Al2O3; and (2) carrying out esterification reaction on polyglycerol-10 and oleic acid under catalysis of a combined catalyst B to obtain the polyglycerol-10 oleate, wherein the combined catalyst B is prepared from 5-35% of NaOH, 25-85% of KOH, 5-15% of MgO and 5-25% of Al2O3. According to the synthetic method provided by the invention, the glycerol polymerization reaction and esterification reaction efficiencies can be greatly enhanced, so that polyglycerol-10 oleate is efficiently synthesized. The yield can be improved, and the product purity is improved.

The invention discloses a method for generating 1,2-propanediol by directly performing hydrogenolysis on a glycerol water solution. According to the method, by using Ni-WO3/meerschaum as a catalyst, hydrogen is added under alkaline conditions to catalyze the one-step synthesis of 1,2-propanediol from the glycerol water solution. The Ni-WO3/meerschaum supported catalyst can be utilized to implement one-step hydrogenolysis on glycerol in a water phase under mild conditions to generate the 1,2-propanediol with favorable effects, wherein the glycerol conversion rate can reach 87.01%, and the 1,2-propanediol selectivity can reach 96.67%. The reactant raw materials and catalyst are accessible, and have the advantages of low cost and high stability. The method has the advantages of mild reaction conditions and short process, is convenient to operate, and satisfies the industrial production requirements.

The invention discloses a preparation method and preparation equipment of a gel skin care product based on glycerol and sodium stearate. The method comprises the following steps: firstly, taking 48-50 parts of glycerol, 48-50 parts of deionized water and 0.3-2 parts of sodium stearate; heating the raw materials to 60-90 DEG C, mixing and stirring the raw materials to form a homogeneous system; cooling the raw materials to room temperature, thereby obtaining glycerin-based supramolecular gel used as substrate gel; taking 50-100 parts of substrate gel and 0-50 parts of functional components and evenly mixing; heating the mixture to 60-90 DEG C, stirring the raw materials evenly, and carrying out heat preservation for 5 minutes after forming the homogeneous system; injecting into a mold and molding; and cooling to room temperature, so as to form the gel skin care product. The preparation method and the preparation equipment have the beneficial effects that cheap glycerin-based gel instead of a high-molecular polymer is taken as a gelatinizing agent, so as to prepare the gel skin care product with moisturizing and skin-protecting effects.

The invention provides a method for chromatographic separation of glycerol glucoside, which adopts specially prepared adsorption separation resin, particularly a multi-separator simulated moving bed chromatographic separation device adopting the adsorption separation resin, and can be used for separating the glycerol glucoside under the condition that water is used as a mobile phase. The method has high separation efficiency on glycerol glucoside, glycerol and fructose/glucose, the yield of glycerol glucoside is greater than or equal to 85%, and the purity of the concentrated glycerol glucoside product is greater than or equal to 90% and even greater than or equal to 99%; and the method also has higher separation efficiency on glycerol, fructose and glucose.

The invention provides a method for improving moisture retention of polyglycerol fatty acid ester. The preparation method comprises the following steps: firstly, carrying out polymerization reaction on glycerol under the catalysis of a solid base catalyst to prepare mixed polyglycerol, then carrying out purification treatment on the mixed polyglycerol by adopting molecular distillation, and introducing a polyglycerol fatty acid ester emulsifier after purification to obtain the polyglycerol with improved moisturizing performance; and carrying out esterification reaction on the polyglycerol and liquid fatty acid to prepare the polyglycerol fatty acid ester. The polyglycerol obtained by the preparation method is concentrated in polymerization degree and appropriate in smell and color, and the moisturizing performance is obviously improved.

The invention relates to an optical memory device and method for the preparation of the optical memory device based on glycerol, a very common and versatile solvent, mixed deformed helix ferroelectric liquid crystal (DHFLC) having applications in ferroelectric liquid crystal based devices, the said method comprising the steps of forming patterns of different shapes and configurations by lithographic methods to obtain an effective electrode area of at least 4.5 mm on a glass substrate coated with indium tin oxide; depositing the patterned glass substrate with a polymer nylon 616 in the thickness range of 200 A-400 A; baking the coated substrate followed by hard rubbing of the polymer coated surface using buffing machine; photo lithographically developing spacer to maintain a uniform thickness of 3 μm; filling glycerol mixed deformed ferroelectric liquid crystal material in the space between the coated glass substrates, followed by sealing the sandwiched glass substrates at the periphery; heating and cooling the sandwiched glass substrates, followed by application of electric field across the sandwiched substrates for achieving the stable memory action and fastness of the response, by applying an AC and DC field across the device to obtain an optical memory device.

The invention discloses a production method of glycerin tribenzoate. The production method comprises the following steps: carrying out heating reflux for water distribution on glycerol and benzoic acid under the existence of an alkaline substance and a dehydrating agent, carrying out a dehydration esterification reaction, carrying out reaction liquid post-treatment after the reaction is finished, to prepare the glycerin tribenzoate. A ratio of the amount of substance of the glycerol to the benzoic acid is 1: (3.0-3.3); and the alkaline substance is carbonate, bicarbonate, hydroxide or benzoate of alkali metals or alkaline-earth metals. In the invention, a dehydration esterification reaction is carried out under the existence of alkaline, so that side reactions such as glycerol polymerization and glycerol dehydration to generate acraldehyde and the like are greatly inhibited, production of corresponding by-products is reduced, and the yield of the principal product and the content of the product are improved. The operation is simple, the process stability is high, the corrosion and material requirements for equipment are greatly reduced, and meanwhile, the product is low and stable in chromaticity, being suitable for industrial production.

The invention discloses a high-yield propionic acid propionibacterium jensenii engineering bacterium and application thereof, and belongs to the field of genetic engineering. A molecular method is adopted. The propionibacterium jensenii engineering bacterium serves as a host, and overexpression is carried out on malate dehydrogenase (mdh) from Klebsiella pneumoniae, or overexpression is simultaneously carried out on glycerol dehydrogenase (gldA) from the Klebsiella pneumoniae. Compared with an original strain, the propionic acid yield of recombination and mixing coexpression glycerol dehydrogenase of overexpression malate dehydrogenase and the propionic acid yield of a recombinant strain of the malate dehydrogenase are 36.09 g/L and 39.43 g/L respectively, and are improved by 33.91 % and 46.3 % respectively than that of the original strain. The method provides new ideas for modifying the propionibacterium jensenii and improving productivity of propionic acid fermentation in the industrial biotechnology.

The invention discloses a biocompatible hyper-dispersant preparation method, and belongs to the technical field of hyper-dispersant preparation. The preparation method comprises: carrying out mixed water bath heating on glycerol, sucrose and the like, vacuumizing, carrying out a thermal insulation reaction, adding epichlorohydrin in a dropwise manner, carrying out a water bath reaction, filtering to obtain a filtrate, mixing with a citric acid solution, filtering to obtain a filtrate, concentrating to obtain a modified base liquid, carrying out oil bath heating on the modified base liquid, epsilon-caprolactone and the like, filtering to obtain a filtrate, and standing to obtain the biocompatible hyper-dispersant. According to the present invention, the preparation steps are simple, the obtained product has advantages of good biocompatibility, high dispersion stability, safety, environmental protection and no toxicity, and the protection layer does not generate the thinning phenomenon under the acidic condition.

The invention discloses a dendrobium candidum stem beverage formula. According to the dendrobium candidum stem beverage formula, the following main raw materials are needed for per 100 ml of the dendrobium candidum stem beverage: 40 milliliters of dendrobium candidum stem juice, 60 milliliters of lotus leaf juice, 7 grams of white granulated sugar, 0.08 gram of citric acid, and 0.07 gram of carrageenan. The prepared dendrobium candidum stem beverage has very strong decomposition effects on fat, and is also capable of helping to relieve summer-heat, clear away heat, promote diuresis and defecation, reduce fat and eliminate oil; moreover, the dendrobium candidum stem beverage also has very strong reduction effects on glycerol and cholesterol contents in the serum so that the dendrobium candidum stem beverage is capable of regulating blood lipid so as to play a strong health-caring role. The dendrobium candidum stem beverage is suitable for most people to drink, and is good in taste; moreover, the dendrobium candidum stem beverage has the functions of beautifying, tonifying Qi, clearing away heat, detoxifying, promoting secretion of saliva or body fluid, moistening dryness, regulatingblood lipid and enhancing human body immunity.