74 results about "Acetate salt" patented technology

Compositions and methods for providing a person with an exogenous and therapeutically effective supply of short chain fatty acids, chlorogenic acid, and, optionally, ketones are disclosed. The compositions include one or more short chain fatty acids (such as butyric acid, butyrate salts, propionic acid, propionate salts, acetic acid, or acetate salts); chlorogenic acid; and, optionally, one or more beta-hydroxybutyrate salts. The compositions and methods are useful for inducing ketosis and / or beta-oxidative activity in a subject. In addition, compositions that include concentrated forms of, and methods of using, chlorogenic acid (alone or in combination with short chain fatty acids and ketones) to induce ketogenesis in a subject are disclosed.

This invention discloses a method for synthesizing acetate-promoted amidine cobalt complexes. Specifically, when an N,N'-dialkyl-substituted amidine alkali metal salt reacts with a cobalt precursor, acetate is added as a promoter. The chelating effect of acetate regulates the reaction activity and selectivity, enabling the efficient preparation of amidine cobalt compounds. The reaction yield can reach up to 95%, with a product purity >98%. This invention features readily available raw materials, simple operation, mild reaction conditions, good selectivity for the target product, high synthesis efficiency, and convenient post-processing, making it promising for industrial applications.

The invention relates to a metal hydroxide for a heat storage system and a green preparation method and application thereof. The green preparation method of the metal hydroxide, provided by the invention, comprises the following steps: dissolving metal acetate in water, and preparing a metal acetate aqueous solution with the metal ion concentration of 0.01-1mol / L; placing the metal acetate aqueous solution in an open container, and carrying out evaporation concentration treatment at 30-95 DEG C for 1-96 hours to generate a metal hydroxide precipitate; and carrying out solid-liquid separation on the metal hydroxide precipitate, washing and drying to obtain the metal hydroxide. The method does not need to add an alkaline agent or an organic auxiliary agent, avoids generation of by-products of salts and high-salt waste liquid, and accords with 12 principles of green chemistry; reaction conditions are mild, the process is simple, operation can be carried out at normal temperature and normal pressure, energy consumption is low, and safety is high; the raw material conversion rate is high, mother liquor can be recycled, and high-atom-economy and low-cost production is achieved.

The invention relates to a hydroxyl functional ionic liquid electrolyte as well as a preparation method and application thereof. The hydroxyl functional ionic liquid electrolyte comprises a lithium salt and a 1-(2-hydroxyethyl)-3-methylimidazole acetate ionic liquid. According to the hydroxyl functional ionic liquid electrolyte, the 1-(2-hydroxyethyl)-3-methylimidazole acetate ionic liquid is used for replacing an organic solvent, so that the hydroxyl functional ionic liquid electrolyte has better thermal stability and chemical stability, and thermal runaway, combustion even explosion, internal short circuit and battery breakage of a lithium battery under severe conditions of high temperature, high pressure and the like can be avoided.

The invention discloses an acetate-resistant domesticated algal strain HpAc50 and an application thereof. The algal strain is preserved in the China Center for Type Culture Collection on January 12, 2026, and the preservation number is CCTCC M 202690. The haematococcus pluvialis strain is obtained by carrying out acetate-resistant domestication on haematococcus pluvialis and can be cultured under the condition that the acetic acid concentration is 0-10g / L, and the yield of astaxanthin is effectively increased. The invention specifically provides three application conditions: illumination of 0-5000lux and a full-nutrient culture medium; illumination is performed at 0-5000 lux, a nitrogen-phosphorus-deficient culture medium is adopted, and an exogenous stimulant is added According to the present invention, with the application of the strain, the cell density, the biomass and the astaxanthin accumulation can be significantly improved under the conditions of illumination of 5000-15000 lux and nitrogen and phosphorus deficiency culture medium, such that the strain has strong acetate tolerance and strong production performance compared with the wild type strain, and is suitable for the large-scale astaxanthin production.

This invention relates to the field of chemical synthesis technology, providing a metal-modified lignin-based functional carbon, its preparation method, and its application. The preparation method includes: treating lignin using a chemical oxidation method to obtain lignin-based functional carbon; mechanically ball-milling the lignin-based functional carbon and metal acetate, washing the resulting material with ultrapure water, and vacuum drying to obtain the metal-modified lignin-based functional carbon material, which is then used to catalyze the isomerization of glucose to fructose. This invention uses lignin as a raw material to achieve the resource-based reuse of biomass; the method for obtaining the metal-modified highly active lignin-based functional carbon material is convenient, green, and safe; the metal-modified highly active lignin-based functional carbon material can not only efficiently convert glucose isomerization to fructose, but also has a short reaction time and high selectivity; the metal aluminum-modified lignin-based functional carbon catalyst obtained by this invention achieves a glucose conversion rate of 80%-100% and a fructose yield of 55%-60%.

The invention provides a palladium-based catalyst as well as a preparation method and application thereof. The palladium-based catalyst comprises a carrier and active components loaded on the carrier, the active components comprise metal Pd, metal Au and alkali metal acetate, the metal Pd contains Pd nano-particles with the average diameter being smaller than 5 nm, and the Pd nano-particles with the average diameter being smaller than 5 nm account for 1%-20% of the total weight of the metal Pd. The method for preparing the palladium-based catalyst comprises the following steps: (1) dipping a carrier loaded with metal Pd (0) and metal Au (0) in a nano-palladium dispersion liquid to obtain a catalyst precursor IV; and (2) dipping the catalyst precursor IV in a solution containing alkali metal acetate to obtain the palladium-based catalyst. The palladium-based catalyst provided by the invention has excellent catalytic activity and selectivity in a vinyl acetate preparation reaction.

Provided is a method for producing a catalyst capable of producing vinyl acetate at a particularly high selectivity while ensuring high catalytic activity. One method is a method for producing a catalyst for producing vinyl acetate, which comprises a carrier, copper, palladium, gold, and an acetate salt, and the method comprises the following steps in order: Step 1, a step of impregnating the carrier with an alkali solution; Step 2, a step of bringing the carrier into contact with a solution containing a compound containing copper, a compound containing palladium, and a compound containing gold; Step 3, a step of performing a reduction treatment; and Step 4, a step of supporting the carrier with an acetate salt.

The invention relates to the technical field of fuel cell cathode catalysts, and discloses a proton exchange membrane fuel cell cathode catalyst and a preparation method and application thereof.The preparation method comprises the steps that 1, tetraammineplatinum acetate, M metal acetate, citric acid and a solvent are mixed under the stirring condition and subjected to a coordination reaction, and a coordination solution is obtained; a coordination reaction product containing the coordination compound is obtained; wherein M is selected from at least one of Ni, Co and Zn; (2) performing high-temperature pyrolysis on the coordination reaction product in an inert atmosphere; and (3) contacting the product obtained in the step (2) with acid, and then carrying out solid-liquid separation, washing and drying to obtain the carbon-coated platinum-based alloy nano material, and (4) mixing the carbon-coated platinum-based alloy nano material with conductive carbon black. The proton exchange membrane fuel cell cathode catalyst prepared by the invention has excellent sulfur poisoning resistance and good stability.

The invention relates to the technical field of asphalt-based carbon material preparation, and discloses an asphalt-based hard carbon material based on an ion exchange method and a preparation method thereof.The preparation method comprises the following steps that raw material asphalt is smashed, placed in concentrated nitric acid for a heating oxidation reaction, cooled, filtered and dried, and oxidized asphalt is obtained; carrying out ion exchange reaction on the oxidized asphalt and an acetate solution under an alkaline condition, filtering, separating and drying a solid product after the reaction is finished; carrying out carbonization treatment on the solid product in a nitrogen atmosphere; and after carbonization treatment, rapidly cooling to room temperature, pickling, washing to be neutral, filtering, separating and drying to obtain the hard carbon material.

The present invention relates to a composition for intra-articular use for the treatment of osteoarthritis (OA), comprising cross-linked hyaluronic acid or a salt or derivative thereof, clodronic acid or an equivalent salt thereof, and acetate buffer.

The invention relates to the technical field of water electrolysis, and discloses a water electrolysis hydrogen evolution method which comprises the following steps: under a water electrolysis condition, taking a water electrolysis hydrogen evolution catalytic electrode as a working electrode to carry out water electrolysis reaction; the water electrolysis hydrogen evolution catalytic electrode comprises a conductive substrate and a catalytic material compounded on the surface of the conductive substrate, and the catalytic material comprises a carbon-coated platinum-based alloy nano material and conductive carbon black; the preparation method of the carbon-coated platinum-based alloy nano material comprises the following steps: (1) mixing tetraammineplatinum acetate, transition metal acetate, citric acid and a solvent under a stirring condition, carrying out a coordination reaction, and carrying out solid-liquid separation to obtain a product solution; (2) removing a solvent in the product solution, and drying to obtain a precursor material; (3) performing high-temperature pyrolysis on the precursor material in an inert atmosphere; and (4) contacting the high-temperature pyrolysis product with acid, and then optionally washing and drying. The method has relatively low reaction overpotential and relatively high reaction activity and stability.

The invention relates to a method for purifying a non-steroidal GnRH agonist polypeptide, in particular to a method, a system and a product for preparing water-soluble high-purity delorelin acetate. According to the invention, a raw material medicine existing in a high acetate form is obtained through preparative-grade reversed-phase chromatography purification, ion conversion on a column and optimization of salt conversion and freeze-drying pretreatment. The HPLC purity of the product is greater than or equal to 98.5%, the acetic acid content is about 13.9%-14.7% (w / w), the solubility in pure water is greater than or equal to 120 mg / mL, and the product is kept clear for 24 hours; the retention time is consistent with that of a commercial reference substance. And compared with a contrast, the method has the advantages that the high-purity fraction yield is obviously improved, impurities and non-target pair ion residues are reduced, and the method is suitable for industrial amplification and preparation development.

The invention belongs to the technical field of electro-catalysis, and particularly relates to a Ti net substrate loaded manganese ruthenium oxide composite electrode material and a preparation method and application thereof.The preparation method mainly comprises the steps that a pretreated Ti net substrate is placed in an electrolyte containing manganese salt, acetate and sulfate, electro-deposition is conducted on the Ti net substrate, and the Ti net substrate loaded manganese ruthenium oxide composite electrode material is obtained; then putting into a muffle furnace for annealing to obtain Ti / MnOx; and then, soaking and drying in a ruthenium salt solution for multiple times, and annealing in a muffle furnace to obtain Ti / MnOx-RuOy. The preparation method has the advantages of simple and convenient process, mild reaction conditions and low cost, and the prepared composite electrode material has excellent acidic OER performance and stability when being used as a water electrolysis anode.

The application provides a polypropylene dissolving agent and application thereof, and belongs to the technical field of olefin dissolving agents.The polypropylene dissolving agent comprises the following raw materials in mass fractions: dicyanamide salt ionic liquid 10-25 parts, betaine salt 5-15 parts, tetrafluoroborate salt ionic liquid 5-15 parts, ethyl sulfate salt ionic liquid 5-15 parts, acetate salt ionic liquid 10-20 parts, long carbon chain anion ionic liquid 10-40 parts, dispersant 2-18 parts and auxiliary agent 2-20 parts.Under the condition of 180-280 DEG C, the mass fraction of the polypropylene dissolving agent of the application to polypropylene with a molecular weight of 500-1000 million can reach more than 15%, and the wet processing of the ultra-high molecular weight polypropylene into a film can be realized, and the polypropylene diaphragm or polypropylene fiber obtained by processing has the characteristics of high temperature resistance, high strength (including tensile and puncture strength), high porosity, high air permeability and the like.

The application belongs to the technical field of materials, and discloses a non-noble metal catalyst for biomass hydrogenation reaction, and a preparation method thereof, which comprises the following steps: adding A fuel and B metal salt into distilled water, heating, stirring and dissolving, and obtaining a gel along with water evaporation; placing the gel into a high-temperature device, and obtaining metal oxide powder with a spinel structure through a combustion reaction; and reducing the metal oxide powder, thereby obtaining the catalyst. The preparation method of the catalyst uses nitrate or acetate of the non-noble metal B as raw material, and A fuel is chelated with metal ions as a ligand during mixing and stirring, and uniformly disperses the metal ions, and is oxidized by the metal salt as fuel during the solution combustion synthesis, releases heat, decomposes to generate gas, and brings abundant mesopores to the obtained spinel oxide. The raw material is low in cost, green and environment-friendly, the preparation process is simple, the period is short, and the catalyst has great industrial application potential.

The application discloses a method for efficiently catalyzing alcoholysis of waste polylactic acid by using metal-free bicyclic guanidine acetate salt. The catalyst used in the application is metal-free bicyclic guanidine acetate salt, and the catalyst has high catalytic activity for alcoholysis of waste polylactic acid; under certain conditions, the waste polylactic acid can be 100% degraded, and lactic acid ester with a high yield (the yield ranges from 91.4% to 95.6%) can be obtained, so that the waste polylactic acid can be upgraded and reused. Meanwhile, the catalyst has strong thermal stability and is not easy to decompose at high temperature, and can be recycled. The method solves the problems of slow reaction rate, low yield and metal residues in products in the alcoholysis process of waste polylactic acid, and the catalyst has the advantages of green pollution-free and recyclable use.

The application discloses a catalyst for preparing vinyl acetate, a preparation method and application thereof. The catalyst comprises a carrier and Pd, Au and alkali metal acetate supported on the carrier; and the Zeta potential of Pd-Au on the surface of the catalyst is 30-65 mV. The catalyst is suitable for a synthesis reaction of vinyl acetate by using ethylene, and has the advantages of high space-time yield and high selectivity of vinyl acetate.

The application discloses a lubricating coating for high-temperature fasteners and a preparation method and application thereof. The lubricating coating is prepared by using inorganic phosphate as a binder, nano boron nitride, silver powder, molybdenum disulfide and tungsten disulfide as composite lubricants, antimony trioxide as an antioxidant, nano silicon dioxide as a phosphate binder reinforcing agent, water and anhydrous ethanol as a dispersion medium, and propargyl alcohol as a corrosion inhibitor. The coating is immersed or sprayed on the fastener, and a coating is formed after a certain curing condition. The coating has good adhesion, flexibility and impact resistance, and has no corrosion defects such as pitting, cracking and bubbling after an acetate salt spray test (AASS) for 240 hours. According to the locking torque test in accordance with HB 7687-2001, the locking torque requirement is met after 15 cycles at room temperature and 5 times of warm loading and then air cooling to room temperature. The application has a good application prospect in the field of high-temperature fastener coatings.

The invention relates to the field of environmental water treatment, and discloses lanthanum-titanium modified autoclaved aerated concrete as well as a preparation method and application thereof. The preparation method comprises the following steps: adding autoclaved aerated concrete (CAAC) into a mixed solution of tetrabutyl titanate and ethanol; adding a mixed solution of glacial acetic acid, hydrochloric acid, water and ethanol, and stirring until gel is formed; drying and grinding the gel; adding into lanthanum nitrate, adjusting the pH value of the solution, stirring and standing; and washing the precipitate, drying, and calcining again to obtain the lanthanum-titanium modified autoclaved aerated concrete (La-Ti-CAAC). The specific surface area is 50.94 m < 2 > / g, and the aperture is 8.02 nm. The adsorption capacities of the La-Ti-CAAC on the fluoride and the phosphate respectively reach 20.99 mg / g and 24.26 mg / g. The adsorption effect is good under the condition that the pH value is 3-10, the selectivity is good, and the good adsorption capacity is still achieved after four times of circulation.

The invention belongs to the field of AEMWE catalytic application, and particularly relates to a Ni / NiO RE2O3 / C nano-catalyst and a hectogram-level preparation method and application thereof. The hectogram-level preparation method of the Ni / NiO (at) RE2O3 / C nano-catalyst comprises the following steps: uniformly ultrasonically dispersing nickel acetylacetonate, rare earth acetate and a carbon carrier in a solvent, heating and stirring the obtained dispersion liquid until the dispersion liquid is dried by distillation, grinding, and calcining the ground material in hydrogen-containing gas to convert the nickel acetylacetonate into Ni and NiO, thereby obtaining the Ni / NiO (at) RE2O3 / C nano-catalyst. And the rare earth acetate is converted into rare earth oxide. By adopting the method, hectogram-scale preparation of the Ni / NiO (at) RE2O3 / C nano-catalyst can be realized, and the obtained Ni / NiO (at) RE2O3 / C nano-catalyst can significantly improve the hydrogen production efficiency of alkaline HER, and shows excellent electro-catalytic performance on MEA of AEMWE.

The invention discloses a reflection infrared spectrum quantitative method for trace acetate in polylactic acid fiber. The method comprises the following steps: preparing a polylactic acid film standard substance; testing the infrared spectrum of the standard substance by using an attenuated total reflection mode; the method comprises the following steps: selecting an acetate characteristic absorption peak at 1571 cm <-1 > and a polylactic acid characteristic absorption peak at 1753 cm <-1 > from an infrared spectrum of a standard substance, calculating a peak intensity ratio of the two characteristic peaks as infrared characteristic intensity, and deducing a quantitative functional expression; testing the infrared spectrum of the polylactic acid film sample by using an attenuated total reflection mode to obtain infrared characteristic intensity; and substituting the infrared characteristic intensity into a quantitative functional expression, and calculating to obtain the acetate content. According to the reflection infrared spectrum quantitative method, the limitation that the traditional infrared technology is weak in response to trace components and is easily interfered by a matrix is effectively overcome, the detection accuracy and repeatability are remarkably improved, and a reliable analysis means is provided for quality monitoring of a material surface modification process.

Provided are an acetate crystal form of an acid-suppressing compound, and a preparation method therefor and a use thereof. The crystal of the compound comprises crystal form A, and the structural formula of the crystal is as shown in formula (I). The crystal form exhibits good stability, high purity, and excellent physiochemical properties, and requires a simple preparation process. The present invention is suitable for the field of compounds, and can solve the problem in the prior art of poor water solubility in acid-suppressing compounds.

The invention discloses polysubstituted benzoate acetate containing guanidyl as well as a preparation method and application of the polysubstituted benzoate acetate. The structural formula of the polysubstituted benzoate acetate containing guanidyl is shown in the specification, according to the invention, Boc protecting groups are removed under the action of glacial acetic acid (AcOH), and MBH212 acetate molecules are obtained after pulping and purification of methyl tert-butyl ether (MTBE). The yield of the MBH212 acetate product prepared through the method is high, the total yield reaches 45-55% and is far higher than that of similar guanidine substances, and the prepared MBH212 acetate molecule is good in solid property, good in solubility in common organic solvents and capable of effectively supporting subsequent pharmaceutical testing and research on the molecule.

Slurries and methods of making slurries for modifying and extending relative humidity control ranges. The slurries may include a saturated aqueous salt and one or more other reagents selected to provide a controlled modifiable narrow range of relative humidity. The saturated aqueous salt may be one or more of sodium chloride, potassium chloride, potassium citrate, sodium formate, and / or magnesium chloride, and the one or more other reagents may be one or more of a lactate salt, glycerol, and / or an acetate salt, for example.

The invention belongs to the field of drug sustained release preparations, and provides an ovulation inducing preparation for improving fertility and a preparation method thereof. The core-shell structure microsphere design is adopted, leuprorelin acetate is entrapped in the core of the polylactic acid microsphere, and covalently anchored amido bond connection is formed through an end group activated polylactic acid NHS ester intermediate and a chitosan-sodium tripolyphosphate ion network shell layer, so that the high stability of the shell layer is realized; by optimizing the compounding use of the internal phase stabilizer and the freeze-drying protective agent, the particle size distribution D50 of the microspheres is controlled to be 10-60 microns, the thickness of the shell layer is controlled to be 0.05-5 microns, and high encapsulation efficiency, good drug slow release performance and excellent storage stability are realized. The technical problems that in an existing peptide medicine core-shell microsphere system, a shell layer is prone to falling off, the medicine is suddenly released, and the stability is poor after freeze-drying are solved, and the peptide medicine core-shell microsphere has the advantages of being high in encapsulation efficiency, controllable in release and good in biocompatibility and has wide application value in the technical field of assisted reproduction.

This invention relates to crystals of compounds of formula (I), methods for their preparation, and applications. Specifically, this invention provides crystals of compounds of formula (I), wherein the crystals comprise crystal form A. The crystal form exhibits good stability, high purity, excellent physicochemical properties, and a simple preparation process.

This invention provides a method for synthesizing vinyl acetate and a catalyst for the ethylene-based synthesis of vinyl acetate, as well as a method for preparing the catalyst; the catalyst includes a support and Pd, Group IB metal, and alkali metal acetates supported on the support, wherein the X-ray photoelectron spectroscopy (XPS) of the catalyst shows Pd... 2+ The content of Pd in ​​this state accounts for 10% to 45% of the total Pd element content, preferably 15% to 42%. The vinyl acetate catalyst of this invention mainly solves the problem of high levels of diethylene acetate as a byproduct in the gas-phase synthesis of vinyl acetate from ethylene. This invention employs a vinyl acetate catalyst comprising a support and Pd, a first-group metal, and an alkali metal acetate supported on the support. The X-ray photoelectron spectroscopy of the catalyst shows that Pd... 2+ The content of ethylene glycol is in the range of 10% to 45%, preferably 15% to 42%, thereby the catalyst can effectively reduce the content of ethylene glycol diacetate in the product.

The present invention relates to a copolymer, and a slurry composition, a separator, and a secondary battery that comprise same, wherein the copolymer comprises, based on 100 wt % of the total weight of the copolymer, 15 wt % or less of a vinylacetate monomer unit, 10-55 wt % of an acrylate-based monomer unit, and 1-10 wt % of an acrylic acid-based monomer unit bound with at least one selected from the group consisting of an alkali metal and an acetate salt compound comprising an alkali metal.