18 results about "Tetrabutylammonium hydroxide" patented technology

The invention belongs to the technical field of eutectic gels, and particularly discloses a severe environment-resistant eutectic gel as well as a preparation method and application thereof. The preparation method comprises the following steps: etching Ti3AlC2 with hydrofluoric acid to prepare MXene, and modifying MXene with a tetrabutylammonium hydroxide intercalation to obtain a tetrabutylammonium hydroxide intercalated MXene nanosheet; the preparation method comprises the following steps: by taking tetrabutylammonium chloride and thymol as raw materials, mixing, heating and stirring to obtain a deep eutectic solvent, sequentially adding isobornyl methacrylate, acrylic acid-2-phenoxyethyl ester, ethylene glycol dimethacrylate, diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide and tetrabutylammonium intercalated MXene nanosheets into the deep eutectic solvent, stirring in a dark place, and carrying out vacuum drying, so as to obtain a finished product. And performing photo-crosslinking curing under ultraviolet irradiation to obtain the eutectic gel. The eutecticevaporate gel prepared by the invention not only has good mechanical properties, but also has good toughness, self-adhesion, freezing resistance, high temperature resistance, moisture resistance, drying resistance and excellent strain sensitivity, and overcomes the defect that the traditional hydrogel and hydrophilic eutecticevaporate gel are not moisture-resistant; the method has wide application prospects in the fields of flexible strain sensors, intelligent wearable devices, bionic electronic skins, medical health monitoring or intelligent soft robots and the like.

The invention relates to the field of medicine detection, in particular to a method for detecting the content of gluconate radicals in a liquid preparation. The detection method comprises the following steps: detecting the gluconate radical-containing liquid preparation dissolved by a sodium hydroxide solution through a high performance liquid chromatography, and the chromatographic conditions are as follows: a chromatographic column takes octadecyl bonded silica gel as a filler; the mobile phase comprises a mobile phase A and a mobile phase B; the mobile phase A is a mixed solution of a tetrabutylammonium hydroxide solution and acetonitrile in a volume ratio of (85-95): (5-15), the mobile phase B is a mixed solution of a tetrabutylammonium hydroxide solution and acetonitrile in a volume ratio of (30-50): (50-70), and the pH value of the tetrabutylammonium hydroxide solution is adjusted to 6.0-8.0 by adopting phosphoric acid; and gradient elution is carried out. According to the detection method, interference of impurities and other related substances in the liquid preparation can be avoided, the detection method is high in operability, easy and convenient to operate, high in sensitivity, good in repeatability and high in accuracy, the content of gluconate radicals in the liquid preparation medicine can be more accurately detected, and medicine quality control is facilitated.

The application discloses a water-repellent and oil-repellent fabric and a preparation method thereof, and belongs to the technical field of fabric finishing. The preparation method of the water-repellent and oil-repellent fabric comprises the following steps: taking fabric grey cloth for immersion pretreatment, washing with hot water, washing with warm water, washing with cold water, and airing; immersing the pretreated fabric grey cloth in a finishing liquid, twice immersion and twice pressing, pre-drying, baking, washing, and drying, so that the water-repellent and oil-repellent fabric is obtained; the finishing liquid comprises: a finishing agent, which is mainly prepared from a short-chain fluorine-containing acrylate polymer with raw materials of a double-side symmetrical fluorine-containing acrylate monomer, octadecyl acrylate, butyl acrylate, methyl methacrylate, 2-hydroxyethyl acrylate and 5-hydroxyamyl acrylate; and a finishing auxiliary agent, which comprises a starch grafted carbon nanotube, tetrabutylammonium hydroxide, deionized water, glycerol, calcium chloride, a hydrochloric acid solution and a mixed solution of epichlorohydrin; the surface of the fabric is treated by preparing the finishing liquid, so that the water-repellent and oil-repellent effect of the fabric is enhanced.

The invention belongs to the technical field of chemical catalysis, and provides a preparation method and application of a modified MCM-22 molecular sieve catalyst. Unroasted MCM-22 (P) is used as a raw material, organic alkali (such as tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide or tetrabutylammonium hydroxide) is adopted for modification treatment, and then ion exchange and roasting are performed to obtain the hydrogen type modified molecular sieve. Organic alkali has the synergistic effect of alkali treatment and structure guiding, and the crystal phase purity and framework integrity are maintained while controllable desilicication is achieved. The catalyst is used for alkylation removal reaction of thiophenic sulfur in styrene, the selectivity of mono-substituted alkylation products is remarkably improved, and side reaction of styrene polymerization is effectively inhibited. The preparation method is simple, the catalytic performance is excellent, and the catalyst has a good industrial application prospect.

The invention belongs to the technical field of zeolite molecular sieve preparation, and particularly discloses a preparation method and application of a Ni-EMT zeolite molecular sieve.The Ni-EMT zeolite molecular sieve is prepared by using a complex of nickel nitrate hexahydrate and ethylenediamine as a nickel source and a template agent and using relatively cheap tetrabutyl ammonium hydroxide and tetraethylammonium hydroxide as synergistic template agents. According to the present invention, the Ni-EMT zeolite molecular sieve is directly prepared by using the one-pot method, the prepared Ni-EMT zeolite molecular sieve has characteristics of high crystallinity, stable molecular sieve structure, large specific surface area and large pore, and compared with the traditional method, the use of the expensive and high-toxicity 18-crown ether-6 template agent is avoided, and the metal nickel is coated in the EMT molecular sieve in situ so as to achieve the purpose of the in-situ preparation of the Ni-EMT zeolite molecular sieve. According to the present invention, the nickel loading amount of the Ni-EMT zeolite molecular sieve prepared by the method can be adjusted, such that the Ni-EMT zeolite molecular sieve can be used for the catalytic reactions such as the preparation of cyclohexylbenzene through the hydroalkylation of benzene, and can be widely used in the actual industrial application.

The present disclosure relates to a kind of UZM-8 molecular sieve and its preparation method, catalyst and application containing UZM-8 molecular sieve, the method includes: the raw material mixture containing silicon aluminum source, first template agent, second template agent and water is carried out hydrothermal crystallization reaction and recovers product;Wherein, the first template agent is at least one selected from tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide and tetrabutylammonium hydroxide, the second template agent is dimethyl diethyl ammonium hydroxide.Compared with the UZM-8 molecular sieve synthesized by traditional hydrothermal method, the UZM-8 molecular sieve with high crystallinity, high specific surface area and pore volume can be synthesized in the present disclosure, while the synthesis cost of molecular sieve is significantly reduced.

The invention relates to the field of medicine detection, in particular to a method for detecting sodium calcium edetate in infantile faropenem sodium granules, which comprises the following steps: detecting an infantile faropenem sodium granule test solution complexed by a ferric trichloride solution through high performance liquid chromatography, chromatographic conditions comprise that a chromatographic column adopts a C18 column; the mobile phase comprises a mobile phase A containing a tetrabutyl ammonium hydroxide solution and a mobile phase B containing acetonitrile, and the mobile phase A adopts phosphoric acid or acetic acid to adjust the pH value to 6.0-8.0; the gradient elution procedure comprises a first elution stage, a second elution stage and a third elution stage which are continuously carried out. According to the detection method provided by the invention, interference of auxiliary materials and other related substances in the preparation can be avoided, the detection method is high in specificity, the content of sodium calcium edetate in the infantile faropenem sodium granules can be more accurately detected, and quality control of medicines is facilitated.

The application discloses application of phosphorus nickel in a hydrogen production process by electrolysis of water, and the phosphorus nickel is prepared by the following method: dissolving a nickel metal salt in water to prepare a nickel metal salt aqueous solution; heating tetrabutylammonium hydroxide to melting to obtain a tetrabutylammonium hydroxide melt; adding the nickel metal salt aqueous solution into the tetrabutylammonium hydroxide melt, and reacting under heating to generate a flaky nickel-containing precursor; under the protection of a protective atmosphere, phosphorizing the flaky nickel-containing precursor with a phosphorus source to generate the phosphorus nickel in a flaky structure, which has low crystallinity and excellent hydrogen evolution catalytic activity, and can be applied in the field of hydrogen production by electrolysis of water, and has excellent hydrogen evolution effect.

The application discloses a preparation method of a fullerol-silver modified PVDF ultrafiltration membrane and belongs to the technical field of PVDF ultrafiltration membrane modification. 60 The C 60 (OH) n is oxidized into a hydrophilic C 60 (OH) n by using a tetrabutylammonium hydroxide (TBAH) base type catalysis method, Ag atoms are grown in-situ on the C 60 (OH) n by using an in-situ growth method, and a C 60 (OH) n -Ag compound is obtained. 60 (OH) n The prepared C 60 (OH) n -Ag modified PVDF ultrafiltration membrane has high water permeability, high interception, high porosity and uniform pore size distribution, is a novel C 60 (OH) n -Ag modified PVDF ultrafiltration membrane which integrates good hydrophilic performance, strong tensile capacity, good acid and alkali corrosion resistance, strong antibacterial effect and excellent anti-pollution performance, and has good effects on wastewater treatment containing organic pollutants and is expected to be applied to the field of wastewater treatment.

The application provides a method for recycling and reusing solvents in a regenerated cellulose material production process, comprising: performing rough filtration on waste liquid generated in the regenerated cellulose material production process to obtain a rough filtrate; treating the rough filtrate with an anion ion exchange resin to obtain an eluate; passing the eluate through a multi-stage series membrane filtration platform to remove micro-nano impurities in the eluate, while separating tetrabutylammonium hydroxide, dimethyl sulfoxide and water, to obtain recovered tetrabutylammonium hydroxide, recovered dimethyl sulfoxide and recovered pure water; and mixing the recovered tetrabutylammonium hydroxide and the recovered dimethyl sulfoxide in a certain proportion and then using them for the production of regenerated cellulose fibers. The method is simple in operation, low in energy consumption and green in environment protection, and realizes efficient and low-cost recycling and reuse of tetrabutylammonium hydroxide solvent and dimethyl sulfoxide solvent.

The invention discloses a method for analyzing edetate disodium in heparin sodium, and belongs to the technical field of medicine analys.The method comprises the steps that a 0.3% tetrabutylammonium hydroxide buffer solution (the pH value is adjusted to 4.0 through phosphoric acid)-water-acetonitrile (20: 45: 35) is used as a mobile phase; the flow rate is 1.0 ml per minute; the detection wavelength is 254 nm; the column temperature is 40 DEG C; the sample injection volume is 20 microliters. According to the method disclosed by the invention, the edetate disodium in the heparin sodium can be effectively separated, so that separation and determination of the heparin sodium and the edetate disodium are realized, and quality control of raw materials and preparations of the heparin sodium and the edetate disodium is realized.

The application discloses a method for characterizing lignin in environmental samples, and belongs to the technical field of lignin detection. The method comprises the following steps: oxidizing a sample by using a CuO / NaOH system; acidifying supernatant; extracting the supernatant by using diethyl ether; further purifying the diethyl ether extract by using a pretreated silica gel column; performing a methylation reaction on the sample by using tetrabutylammonium hydroxide / iodomethane in dichloromethane; diluting the methylation product mixture after neutralization by using diethyl ether; and purifying the reaction mixture by using a silica gel column. The combination of diethyl ether extraction and silica gel column chromatography removes most of the impurities in the sample, and the solvent can be quickly removed under reduced pressure, so that the operation complexity is greatly reduced. The time consumed for gas chromatography maintenance is greatly reduced. The main operation is performed under the protection of gas, so that the operation complexity is greatly reduced. The methylated lignin phenol is stable to air and water, and no obvious change is found after being stored in a refrigeration chamber for one week. The method has no limitation on the number of simultaneous analysis, and is suitable for the conventional lignin characterization of geochemical samples with high lignin content.

The present application relates to the technical field of analytical detection, and in particular to a method and kit for detecting folate and 5-methyltetrahydrofolate in human whole blood. The kit comprises a protective agent Vc solution, folate calibrators and / or quality control products, 5-methyltetrahydrofolate calibrators and / or quality control products, rabbit whole blood diluent, sample extraction solution A containing saturated zinc sulfate solution, sample extraction solution B containing a mixture of methanol, acetonitrile and isopropyl alcohol, tetrabutylammonium hydroxide phosphate buffer and acetonitrile. The kit not only meets the performance indicators, but also has good stability. The detection method and the matching kit have the advantages of low detection cost, simple detection steps and important role in evaluating the content of folate and its metabolites in human whole blood samples.

The invention discloses a ruthenium-based catalyst and a preparation method and application thereof, and relates to the technical field of oxygen evolution reaction catalysis, the preparation method of the ruthenium-based catalyst comprises the following steps: S1, mixing sodium carbonate, ruthenium powder and ruthenium dioxide according to a preset molar ratio, and carrying out a solid-phase reaction in an inert atmosphere to obtain a mixture; s2, soaking the mixture in a sodium persulfate solution; s3, washing the mixture treated in the step S2, and performing soaking exchange on the washed mixture and a hydrochloric acid solution for multiple times; s4, mixing the mixture treated in S3 with a tetrabutyl ammonium hydroxide solution, and carrying out a hydrothermal reaction; s5, dispersing the mixture subjected to the hydrothermal reaction into water, and performing freeze drying treatment; and S6, calcining the mixture subjected to freeze drying treatment to prepare the ruthenium-based catalyst. The metastable-phase two-dimensional 1T-phase ruthenium oxide catalyst is prepared through ion intercalation assisted phase change, and the electro-catalysis oxygen evolution reaction activity and the structural stability are remarkably improved.

The application provides a Mo2TiC2 loaded platinum catalyst and a preparation method and application thereof, and belongs to the technical field of nanometer catalysts.The preparation method comprises the following steps: sequentially performing hydrofluoric acid etching, tetrabutylammonium hydroxide stripping and centrifugal washing on Mo2TiAlC2 to obtain few-layer or / and single-layer Mo2TiC2;mixing and stirring the Mo2TiC2 with a platinum precursor solution, performing hydrothermal treatment, and performing centrifugal washing to obtain Mo2TiC2 two-dimensional material loaded with platinum particles with a size of 0.2-4.5 nanometers.The Mo2TiC2 loaded platinum catalyst obtained by the application has low platinum content, the platinum particles are uniformly dispersed, and the platinum particles are stably arranged on the surface of the Mo2TiC2, and the Mo2TiC2 loaded platinum catalyst exhibits excellent performance and stability in water electrolysis for hydrogen production, thereby providing an effective way for realizing high-efficiency industrial electrolysis for hydrogen production.

This invention discloses a high-performance liquid chromatography (HPLC) method for the purity determination of 4-nitrophenylalanine, including the chemical purity determination of D-4-nitrophenylalanine, L-4-nitrophenylalanine, and DL-4-nitrophenylalanine. The method involves using a chromatographic column packed with octadecylsilane-bonded silica gel, and a mobile phase of 0.1 mol / L ammonium formate buffer-methanol containing 0.1% tetrabutylammonium hydroxide (v / v) at a ratio of 78-82:18-22. After injection, the purity of the sample is calculated using the peak area normalization method. This method can effectively separate the components in a short time and features high precision and simple operation.

The invention discloses a Zn-modified hierarchical pore molecular sieve with a nanosheet self-supporting structure as well as a preparation method and application thereof, and belongs to the technical field of preparation of carbon dioxide hydrogenation catalysts. The preparation method provided by the invention comprises the following steps: mixing a Si source, tetrabutyl ammonium hydroxide and water, and carrying out hydrolysis reaction to obtain a first mixed solution; mixing and dissolving a Zn source and an Al source in water to obtain a second mixed solution; and mixing the first mixed solution and the second mixed solution, performing crystallization treatment, and roasting a product obtained after crystallization treatment to obtain the catalyst. The preparation method is simple and low in production cost, and when the obtained hierarchical pore molecular sieve serves as a catalyst to be applied to a carbon dioxide hydrogenation reaction, high selectivity can be achieved on target products C5 and above high-carbon hydrocarbon while the high carbon dioxide conversion rate is maintained, and good catalytic stability is shown.

The application relates to the oil field oil extraction scale inhibition technical field, in particular to a sulfonate scale inhibitor for oil displacement and a preparation method thereof. The sulfonate scale inhibitor for oil displacement is obtained by taking linear polystyrene as a starting raw material, carrying out twice acetyl sulfuric acid sulfonation reaction, and then carrying out two-stage tetrabutylammonium hydroxide neutralization and sodium bicarbonate / sodium hydroxide step-by-step sodium treatment. The obtained scale inhibitor has good dispersion stability in high salinity water, has inhibition on calcium carbonate, barium sulfate and strontium sulfate composite scale, can keep compatibility with a petroleum sulfonate oil displacement system, and can be used for oil field oil displacement or squeeze anti-scale operation.