26 results about "Dihydroxyacetone" patented technology

The invention relates to the field of fine chemical materials, and realizes a low-cost and high-efficiency preparation method of 1, 3-dihydroxyacetone by taking acetone as a raw material through two steps of halogenation reaction and alkali substitution reaction for the first time. The whole process is simple to operate, green and environment-friendly.

The invention relates to the technical field of glass processing, in particular to food-grade cutting fluid for glass processing and a preparation method of the food-grade cutting fluid. The lubricating oil is prepared from the following raw materials in percentage by weight: 50-60% of food-grade base oil, 10-15% of a food-grade lubricant, 3-8% of a food-grade auxiliary stabilizing material and the balance of water, the food-grade auxiliary stabilizing material is composed of a 1, 3-dihydroxy acetone dimer, an emulsion stabilizer, an adsorption stabilizer and an enhancement and protection stabilizer; the emulsion stabilizer is emulsified calcium stearate dispersion liquid and / or sodium polyphosphate; the adsorption stabilizer is a composition of multiple of magnesium trisilicate, food-grade diatomite and food-grade activated clay; the reinforcing and protecting stabilizer is calcium alginate and / or food-grade titanium dioxide, food-grade raw materials are adopted, and the glass cutting agent has a good cutting effect and good quality stability when being used for glass processing.

This invention relates to the field of hydrogen production technology, specifically to a method for producing dihydroxyacetone from glycerol via electrochemical oxidation coupled with hydrogen production. The method includes: S1 preparing a glycerol alkaline solution as the electrolyte solution, the purity of which must reach analytical grade; S2 placing the electrolyte solution prepared in S1 into an electrolytic cell, connecting the positive terminal of a power supply to the anode in the electrolytic cell, and connecting the negative terminal of the power supply to the cathode in the electrolytic cell; S3 turning on the power supply and, at a defined temperature, performing a redox reaction and a hydrogen evolution reaction to obtain dihydroxyacetone prepared by anodic oxidation, and simultaneously obtaining hydrogen gas prepared by cathode hydrogen evolution. This patent constructs a synergistic reaction system of selective anodic oxidation to dihydroxyacetone and efficient cathode hydrogen evolution by using a glycerol alkaline solution as the electrolyte solution. The glycerol alkaline solution weakens the nucleophilic attack intensity of hydroxide ions and inhibits carbon-carbon bond breaking through the in-situ protection mechanism of the glycerol carbon chain, achieving highly selective and directional synthesis of dihydroxyacetone.

The invention provides a carbon chain elongase as well as a coding gene and application thereof, the amino acid sequence of the carbon chain elongase is as shown in a sequence table SEQ ID NO.1, the nucleotide sequence of the gene for coding the carbon chain elongase is as shown in a sequence table SEQ ID NO.2, and the carbon chain elongase can be used as a formaldehyde lyase and has a function of efficiently catalyzing formaldehyde to synthesize 1, 3-dihydroxyacetone.

The application discloses a formaldehyde lyase mutant and application thereof. The formaldehyde lyase mutant provided by the application can regulate the generation proportion of a two-carbon and three-carbon product generated by catalyzing formaldehyde condensation, has improved activity of catalyzing formaldehyde condensation into glycolaldehyde, and reduced activity of catalyzing formaldehyde condensation into 1,3-dihydroxyacetone, compared with formaldehyde lyase.

The invention relates to a preparation method and application of a phosphorus-doped lignin-derived carbon-loaded NiCu alloy material. The preparation method comprises the following steps: preparing phosphorized lignin by phosphorizing a plurality of pairs of lignin, taking the phosphorized lignin as a phosphorus source and a carbon source, regulating pH to enable the phosphorized lignin to be coordinated and combined with Ni and Cu ions to form a nickel / copper-lignin-based supramolecular precursor, and then performing high-temperature carbon burning to obtain the nickel / copper-lignin-based supramolecular composite material. The catalyst combines the advantages of a biomass carbon material and transition metals Cu and Ni, is a catalyst with relatively excellent performance, can be widely applied to electrocatalytic conversion of glycerol, furfural, glucose and other biomass micromolecules into high-value chemicals, and particularly has an excellent effect on conversion of glycerol into a high-value product dihydroxyacetone. The construction of a P-C structure on the carrier is beneficial to the local enrichment of active oxygen groups, the generation of metal active sites is promoted, the oxidation rate of glycerol is accelerated, and NiCu alloying obviously improves the selectivity of dihydroxyacetone. The catalyst is stable in effect, rich in resources and low in price.

The invention relates to a dihydroxyacetone phosphate transaminase CJ1361 mutant with improved stability, and a gene recombinant bacterium containing the dihydroxyacetone phosphate transaminase CJ1361 mutant and an enzyme liquid of the gene recombinant bacterium as biocatalysts, which are used for synthesizing serinol by a microbial fermentation method. Compared with the wild type dihydroxyacetone phosphate transaminase CJ1361, the yield of serinol produced by the dihydroxyacetone phosphate transaminase CJ1361 mutant provided by the invention is remarkably improved.

The invention discloses a method for producing dihydroxyacetone (DHA) through selective photoelectric oxidation electrolysis of glycerol. The method comprises the following steps: preparing a phosphate buffer solution containing H2PO4 <-> and / or HPO4 < 2->; adding glycerol into the phosphate buffer, and uniformly mixing to obtain an electrolyte; and carrying out photoelectric oxidation electrolysis on the electrolyte by adopting a working electrode made of TiO2 so as to obtain the product DHA. The production process is simple and convenient, and is especially suitable for industrial large-scale efficient production of DHA.

This invention relates to the field of plant disease control technology, and in particular to the application of dihydroxyacetone (DHA) in the control of root rot and / or the promotion of plant growth. This invention found that DHA can effectively antagonize the growth of the pathogen *Fusarium graminearum*, with an inhibition rate of 36.14%–48.65%. In soil culture experiments, at 7 days, both high concentrations (1M) and low concentrations (5mM) of DHA showed good control effects on maize root rot, with disease control efficacy reaching 14.17% and 27.08%, respectively. Simultaneously, both showed good growth-promoting effects; low concentrations of DHA increased the aboveground biomass of maize by 65.30% compared to diseased plants. At 14 days, the control efficacy of high concentrations (1M) and low concentrations (5mM) of DHA against maize root rot was 15.24% and 33.05%, respectively, and low concentrations of DHA increased the aboveground biomass of maize by 135.32% compared to diseased plants.

The invention discloses a water-based zinc ion battery electrolyte containing 1, 3-dihydroxyacetone and a preparation method and application thereof. The water-based zinc ion battery electrolyte comprises a zinc salt, an additive and a solvent, the additive is 1, 3-dihydroxy acetone. 1, 3-dihydroxy acetone is introduced into the zinc sulfate electrolyte of the water-based zinc ion battery to inhibit dendritic growth of a zinc anode, an EDL structure at a zinc anode interface is adjusted, and the cycle life of the water-based zinc ion battery is prolonged. The 1, 3-dihydroxy acetone serving as a bifunctional group can improve ion diffusion and nucleation kinetics on a zinc interface, so that uniform electrodeposition of zinc is realized. Besides, HER can be inhibited by replacing water molecule groups around zinc ions, and 1, 3-dihydroxyacetone is used as an electrolyte additive of the zinc ion battery, so that zinc foil corrosion and zinc dendrite growth are effectively inhibited, the stability and reversibility of a zinc anode in the deposition or stripping process are remarkably improved, and the service life of the zinc anode is prolonged. Therefore, the water-based zinc ion battery has excellent electrochemical performance and long cycle stability.

The invention provides a property-changed dihydroxyacetone kinase mutant and application thereof, and relates to the technical field of enzyme engineering. Through rational design and molecular modification, wild dihydroxyacetone kinase is subjected to single-point mutation and combined mutation, a series of enzyme mutants with enhanced thermal stability are obtained, and the catalytic activity of the mutants under the high-temperature condition is remarkably superior to that of wild enzymes. The invention further provides a multienzyme coupling reaction system containing the dihydroxyacetone kinase mutant, and the multienzyme coupling reaction system is used for efficiently catalyzing the process of synthesizing lactic acid by taking dihydroxyacetone as a substrate. The thermostable dihydroxyacetone kinase mutant provided by the invention solves the key bottleneck that a wild enzyme is easy to thermally inactivate under industrial application conditions, and has important industrial application prospects.

The application provides the field of electronic cigarettes, in particular to an atomization base liquid, an atomization liquid and a method for reducing small particle size aerosol particles, the atomization base liquid comprising one or more combinations of propylene glycol, glycerol, water and ethanol, characterized in that it further comprises 1,3-dihydroxyacetone, wherein the mass fraction of 1,3-dihydroxyacetone is 5-50%. The atomized particles of the electronic cigarette aerosol containing the atomization base liquid will be concentrated in two particle size ranges; the small particle size aerosol can make the smoker quickly satisfied, the amount of smaller particle size aerosol is reduced, and the influence on alveoli is reduced. The large particle size aerosol can bring better taste to the smoker.

The invention provides a carbon chain elongase as well as a coding gene and application thereof, the amino acid sequence of the carbon chain elongase is as shown in a sequence table SEQ ID NO.1, the nucleotide sequence of the gene for coding the carbon chain elongase is as shown in a sequence table SEQ ID NO.2, and the carbon chain elongase can be used as a formaldehyde lyase and has a function of efficiently catalyzing formaldehyde to synthesize 1, 3-dihydroxyacetone.

The application discloses mutant protein of phosphonacetyltransferase and application. The application provides mutant protein of phosphonacetyltransferase, residues at positions 21, 36, 42, 49, 64, 82, 150 and 244 in the amino acid sequence shown in sequence 1 are mutated to obtain protein with phosphonacetyltransferase activity; and the synthesis capacity of 1,3-dihydroxyacetone is improved. The application also provides related biological materials and derivatives of the protein and application of the protein in preparation of 1,3-dihydroxyacetone. The 1,3-dihydroxyacetone yield of the protein is greatly improved, the mutant SF6-11 of phosphonacetyltransferase is compared with wild-type phosphonacetyltransferase as a starting material, the 1,3-dihydroxyacetone yield in flask fermentation is increased by 1.65 times, and the 1,3-dihydroxyacetone yield is increased from 2.75+ / -0.07 g / L to 4.54+ / -0.09 g / L.

The application discloses aniline molecular modified semiconductor photoanode and a preparation method and photoelectrocatalytic glycerol oxidation application thereof; the photoanode takes WO3, TiO2 or BiVO4 and the like grown on a conductive glass (FTO) substrate as a base material, and then grafts an aniline monomer molecule at a molecular level on the surface of the base material; the modification method can not only optimize the electronic structure of the base photoanode material to obtain higher photo-generated electron-hole pair migration efficiency and survival time, but also form steric hindrance to affect the adsorption state of glycerol molecules on the surface of the photoanode material, so that the selectivity is improved; the improved photoanode material of the application shows excellent catalytic activity and stability in the application of photoelectrocatalytic glycerol oxidation into glycerol aldehyde, glyceric acid, dihydroxyacetone and other high-value-added three-carbon products.

The application discloses a melanin promoting composition and a preparation method and application thereof, and belongs to the technical field of cosmetics and biological agents. The melanin promoting composition is composed of the following components in percentage by mass: acetyl hexapeptide-1 0.01-0.5 parts, Poria cocos extract 1-5 parts, sophorolipid 0.5-5 parts, 1,3-dihydroxyacetone 3-20 parts, a humectant 5-20 parts, a preservative 0.1-0.5 parts, a thickening agent 0.1-1 part, a pH regulator 0.1-0.3 parts, an emulsifier 0.5-3 parts, and the rest is water. The composition selects a small-molecule peptide with biological activity, and is compounded with sophorolipid, 1,3-dihydroxyacetone, Poria cocos extract and a humectant to realize the functions of promoting tanning, accelerating tanning, prolonging tanning time, avoiding dry skin color and unevenness in the natural tanning process, and strong stability in long-time storage.

Cosmetic compositions comprising a DHA-derived polymer, a method for applying this polymer, and a synthesis method. The present invention relates to the use in cosmetics of a polymer obtained from 1,3-dihydroxyacetone (DHA). The invention also relates to a method for synthesizing this copolymer and to a monomer used as a reagent in this method. Finally, the invention relates to a method for applying this polymer to the skin. Figure for the abstract: Fig. 1.

The invention provides a method for separating 1, 3-dihydroxyacetone and glycerol. The method provided by the invention comprises the step of performing multi-stage extraction on a raw material solution containing 1, 3-dihydroxyacetone and glycerol by using a hydrophobic extraction agent, wherein a solvent in the raw material solution comprises water; the hydrophobic extraction agent comprises a hydrophobic ionic liquid and / or a hydrophobic polar organic solvent. The method provided by the invention has a better separation effect on 1, 3-dihydroxyacetone and glycerol with similar structures, and the two separated substances have higher yield and purity.

The invention relates to the field of organic synthesis, in particular to a synthesis method of glyceryl dioleate. The synthesis method of the glyceryl dioleate comprises the following steps: mixing 1, 3-dihydroxy acetone, oleic acid, a catalyst and a first solvent, and carrying out condensation reaction to obtain 1, 3-dioleoyl acetone; and mixing the 1, 3-dioleoyl acetone, sodium borohydride and a second solvent, carrying out reduction reaction and post-treatment, and crystallizing and purifying to obtain the glyceryl dioleate. The synthesis method of glycerol dioleate provided by the invention has the advantages of short process route, mild conditions, simplicity and convenience in operation, high product purity and the like, and is suitable for large-scale production.

An integrated structure of cocatalyst / heterogeneous structure / tungsten trioxide photoanode, its preparation method, and its application are disclosed, belonging to the fields of biomass conversion and photoelectrocatalysis. First, a zinc oxide / tungsten trioxide heterostructure is synthesized via hydrothermal, spin-coating, and calcination methods. Then, a noble metal-modified nickel phosphide cocatalyst is synthesized via phosphating and loaded onto the surface of the heterostructure to successfully construct an integrated system of cocatalyst / heterogeneous structure / photoanode. The zinc oxide and tungsten trioxide heterostructure can suppress the recombination of photogenerated carriers, while the noble metal-modified cocatalyst can reduce the interfacial resistance between the heterostructure and the electrolyte, accelerate the migration of photogenerated holes, significantly reduce the surface energy barrier, improve surface reaction kinetics, and prolong the lifetime of photogenerated charges. This results in excellent photoelectrocatalytic glycerol oxidation performance, producing only two C3 products: glyceraldehyde and 1,3-dihydroxyacetone. The limited product diversity provides a feasible pathway for improving the high-value coupling of photoelectrocatalytic biomass to hydrogen production.

The present invention relates to a process for producing a foam, which comprises foaming a mixture, comprising one or more poly (amino acid) (A), one or more components (B) capable of reacting with said poly (amino acid) (A), wherein component (B) is selected from reducing sugars, 1,3-dihydroxyacetone, glycolaldehyde, glyceraldehyde or any mixture thereof and one or more blowing agents (F) and the foam obtainable by this process.

The invention relates to the field of photocatalytic materials and biomass platform molecular conversion, and discloses a BiOx / TiO2 composite structure photocatalyst, a preparation method thereof and a method for preparing dihydroxyacetone through selective oxidation of glycerol by using the BiOx / TiO2 composite structure photocatalyst. The catalyst is composed of an anatase TiO2 nanosheet with an exposed {001} crystal face and a BiOx nano-cluster loaded on the surface of the anatase TiO2 nanosheet, BiOx and TiO2 form a heterojunction interface, and the average particle size of the nano-cluster is 0.5-5 nm. The preparation method comprises the following steps: hydrothermally preparing TiO2 nanosheets from a fluorine-containing system; carrying out bismuth salt adsorption-photochemical deposition; separating, washing, drying and calcining to form BiOx. During application, dihydroxyacetone is generated from glycerol through illumination reaction in an oxygen-containing atmosphere. In the embodiment, the conversion rate of glycerol is about 76.5% after irradiation of a 300 W xenon lamp for 4 hours, the selectivity of dihydroxy acetone is about 36.75%, byproducts are remarkably reduced, and the catalyst can be recycled.

The application discloses a Yarrowia lipolytica gene engineering bacterium for producing erythritol by glycerol, and the Yarrowia lipolytica gene engineering bacterium is obtained by random insertion mutation mediated by non-homologous end connection, and strains with high cell growth and high erythritol yield are screened. Further, the gene engineering bacterium overexpresses glycerol dehydrogenase gene GCY3 or ARA1 and dihydroxyacetone kinase gene DAK2 of a glycerol metabolism dihydroxyacetone pathway. Further, the gene engineering bacterium overexpresses transketolase gene TKL1 and transaldolase gene TAL1 of a non-oxidative pentose phosphate pathway. The application further discloses a construction method and application of the gene engineering bacterium. The superior gene engineering bacterium obtained by constructing a mutant library has the characteristics of tolerating high-concentration glycerol, and the substrate conversion rate and glycerol utilization rate are significantly higher than those of a starting strain.

The application provides a Pt-MO catalyst with uniform interface structure X The application relates to a preparation method and application of a catalyst, and the preparation method comprises the following steps: pretreating a carrier by using concentrated nitric acid; mixing an auxiliary compound, a complexing agent, a solvent, and the pretreated carrier to obtain a mixture; and aging, drying, and calcining the mixture to obtain a composite material loaded with an auxiliary oxide MO X The auxiliary oxide MO X Is Bi2O3 or Sb2O3; and the composite material is deposited with Pt by using an atomic layer deposition method to obtain a Pt-MO X Catalyst with Bi2O3 or Sb2O3 as the auxiliary oxide. The catalyst has high interface content of Pt-auxiliary oxide, uniform interface structure distribution, high Pt particle dispersity, uniform particle size, and can efficiently catalyze glycerol oxidation to prepare 1,3-dihydroxyacetone (DHA) in a heterogeneous medium, and has high glycerol conversion rate and DHA yield, and has a wide application prospect.

This invention belongs to the field of glycerol oxidation catalyst technology, and discloses a catalyst for the selective oxidation of glycerol to dihydroxyacetone and its preparation method. The catalyst consists of platinum metal nanoparticles and a bismuth oxychloride-zirconia composite support. Bismuth oxychloride is grown in situ on the zirconium oxide surface to form a heterojunction interface. The platinum metal nanoparticles are anchored to the heterojunction interface by simultaneously interacting with both bismuth oxychloride and zirconium oxide, forming a platinum-bismuth oxychloride-zirconia interface anchoring structural unit. This invention utilizes the heterojunction interface formed by BiOCl and ZrO2 to generate electron redistribution at the interface. The Pt nanoparticles anchored at this interface undergo synergistic electronic coupling with the two supports, thereby regulating the electronic structure of Pt and optimizing its adsorption and activation behavior for glycerol molecules, making Pt more conducive to promoting the directional oxidation reaction pathway of secondary hydroxyl groups.

This invention discloses a strain derived from *Pseudomonas fluorescens* (…). Pseudomonas fluorescens ) and Arshan Polymorphobacter ( Polymorphobacter arshaanensis This invention discloses benzaldehyde lyase and its mutants, and their application as catalysts in the catalysis of chiral aromatic 2,3-dihydroxyacetone compounds. The benzaldehyde lyase of this invention exhibits advantages such as high efficiency, excellent stereoselectivity, and broad substrate applicability. It can achieve configurational stereocomplementation and achieve yields up to 93%. ee With a value as high as 99%, it can achieve pilot-scale amplification synthesis, which is conducive to low-cost production and has industrial application prospects.