183 results about "Formate" patented technology

The invention provides a photocuring composition and application thereof. The composition comprises the following components: (a) at least one benzoyl formate compound; (b) at least one ethylenically unsaturated photopolymerizable compound; the benzoyl formate compound is obtained by reacting a compound shown in a general formula (I) with a compound shown in a general formula (II) or a general formula (III), or is obtained by further reacting the compounds shown in the general formula (I), the general formula (II) and the general formula (III) with a compound with an end-capped substituent group for end capping. The sensitivity of the obtained product is not reduced compared with that of existing small molecules, and the hardness of the product is improved under LED curing.

The invention relates to a chemically modified high-strength high-temperature-resistant polyurethane fiber and a preparation method thereof.The preparation method comprises the following steps that 1, oligomer mixed polyol and diisocyanate are subjected to a full prepolymerization reaction, a solvent is added for full dissolution, and a-NCO-terminated prepolymer polyurethane formate solution is obtained; 2) adding hydroxyalkyl silane and a catalyst into the prepared prepolymer, and fully reacting to obtain a modified prepolymer; (3) carrying out chain extension reaction and chain termination reaction on the prepared modified prepolymer to obtain a polyurethane urea solution; (4) adding an antioxidant, an ultraviolet light absorber, an anti-yellowing agent, a delustering agent and a lubricating and releasing agent into the polyurethane urea solution to prepare a polyurethane spinning solution; and (5) preparing the high-strength high-temperature-resistant polyurethane from the prepared polyurethane spinning solution by virtue of a dry spinning system. According to the invention, a polyurethane molecular chain is subjected to functional chemical modification, so that the product has the characteristics of high temperature resistance and high strength.

The invention discloses a citric acid coordination regulated amino-functionalized palladium-silver alloy catalyst as well as a preparation method and application thereof. Nitrogen-doped carbon is used as a carrier, and the palladium-silver alloy catalyst is constructed through coordination-confinement in-situ reduction of citric acid. According to the preparation method, citric acid is introduced, and synergistic interaction of sub-nano-scale dispersion and efficient interface mass transfer is achieved through dual synergistic regulation and control of the size and the interface; the coordination effect enables the palladium-silver alloy to achieve sub-nano-scale superfine dispersion; as a competitive hydrogen bond acceptor / donor, the polycarboxyl group can effectively break an interface hydrogen bond network and inhibit the formation of a tight gas film from the source. The mechanism ensures that the catalyst is always in full contact with a mixed aqueous solution containing formic acid and formate and hydrogen is quickly released during formic acid dehydrogenation hydrogen production reaction, so that the catalyst has excellent anti-poisoning cycling stability while keeping high intrinsic activity, and the technical problem that high activity and long-term stability are difficult to consider at the same time is solved.

This application relates to the field of functional crystalline material preparation and microfluidic application technology, specifically disclosing a method and product for preparing formate crystals using core-shell microcapsules, including the following steps: (1) dissolving a solid alkaline raw material in a formic acid solution to prepare reaction solution a; (2) separately conveying polymer solution A and polymer solution B with phase separation characteristics, and reaction solution a, so that they are mixed at the intersection of microchannels to prepare dispersed phase b, which is then introduced into the assembly zone for phase separation assembly to form core-shell microcapsules; (3) the core-shell microcapsules are crystallized in a continuous temperature-changing crystallization zone to form formate solid; (4) the formate solid is collected, washed and dried sequentially to obtain the target product; (5) the oil layer is continuously extracted and returned to the assembly zone for recycling. The formate crystals prepared in this application not only have a large particle size, but also exhibit good size uniformity and morphological repeatability, and have the advantages of high throughput, green environmental protection, and simple operation.

The present application relates to a kind of preparation method of vicinal diol compound, which comprises the following steps: in non-aqueous solvent, formula (I) compound and reducing agent are reacted under light condition, to obtain the vicinal diol compound shown in formula (II);The reducing agent is formic acid or formate;The wavelength of the light is less than 390nm;Its reaction formula is as follows.The preparation method of the present application does not need transition metal catalyst, also does not need other special catalyst and special additive, and the aldehyde ketone substrate can be reacted with formic acid or formate in solvent by specific wavelength of light, to obtain corresponding vicinal diol compound with high yield, its reaction condition is mild, has wide substrate applicability, and green and environmental protection, simple and practical operation method, provides an effective synthesis strategy for the synthesis of shikimic alcohol compound.

The present invention discloses a triazine benzoate compound having the structure shown in formula (I) or a stereoisomer:The definition of each substituent in the formula I is described in the description. The compound of the formula I of the present invention has excellent herbicidal activity and can be used for controlling weeds.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a synthesis method of 1-(tert-butyl)-3-ethyl-4-(4, 4, 5, 5-tetramethyl-1, 3, 2-dioxaborane-2-yl)-5, 6-dihydropyridine-1, 3 (2H)-dicarboxylate. According to the invention, 1-(tert-butyl)-3-ethyl-4-oxopiperidine-1, 3-diformate, namely the compound A, is taken as a base material, two-step reaction is carried out, the reaction conditions are relatively mild, the product yield is high, and the operation is easy.

The invention provides a three-dimensional multi-stage needle tip array type Bi-CuO integral electrode as well as a preparation method and application of the three-dimensional multi-stage needle tip array type Bi-CuO integral electrode. The integral electrode comprises foamy copper, a copper oxide needle tip array layer growing on the foamy copper and a bismuth nanosheet array layer uniformly covering the surface of a copper oxide needle tip. The integral electrode has a multi-stage self-supporting structure, so that catalyst aggregation or stacking is effectively avoided, and the specific surface area of exposed active sites is remarkably increased; and the electrode also has multiple heterogeneous interfaces, and shows excellent catalytic activity, selectivity and electrochemical window when being used as a working electrode for electrically reducing CO2 to prepare formate. The preparation method comprises the following steps: generating the copper hydroxide nanowire layer on foamy copper in situ by using a chemical oxidation method, performing annealing treatment in air to form the copper oxide needle tip array layer, and depositing the bismuth nanosheet array layer on the surface of the copper oxide needle tip by using a wet chemical method to obtain the integral electrode. The preparation method is novel and simple, the use of a binder is avoided, the operability is high, and the preparation method has a good application prospect.

The invention relates to a synthesis method of novel energy-saving phosphorus-doped copper oxide, a catalyst as well as a preparation method and application of the catalyst. The synthesis method comprises the following steps: S100, obtaining copper oxide nanoparticles; s200, obtaining a black phosphorus nanosheet; s300, the copper oxide nanoparticles and the black phosphorus nanosheets are mixed and then subjected to ultrasonic treatment, and phosphorus-doped copper oxide is obtained.According to the method, the phosphorus-doped copper oxide nanoparticle catalyst can be synthesized under the mild condition, and very high methanol oxidation reaction activity and formate selectivity are achieved.

The invention discloses a synthetic carbamate compound based on 3-substituted dioxazolone as well as a preparation method and application of the synthetic carbamate compound, and belongs to the technical field of organic synthesis. The synthesis method comprises the following steps: (1) preparing 3-substituted dioxazolone from hydroximic acid with different substituent groups and phosgene under an ice bath condition; and (2) reacting the 3-substituted dioxazolone obtained in the step (1) with different phenols (alcohols) under an alkaline condition to obtain corresponding carbamate compounds. According to the method, the yield of carbamate is further improved by adjusting the conditions of alkali, equivalent weight, temperature and the like; the preparation method provided by the invention is novel and has the advantages of mild reaction conditions, few generated impurities, high yield, high safety, convenience in operation and the like; and the compound shows good cholinesterase activity in activity screening, and can be used in insecticides or pesticides.

A simple synthetic method of adamantane formate belongs to the technical field of adamantane formate, and comprises the following steps: 1) preparing adamantane formyl chloride: under the protection of nitrogen, carrying out heating reflux reaction on adamantane carboxylic acid and an acyl chloride reagent at 0-70 DEG C for 3-6 hours, and then carrying out rotary evaporation to obtain adamantane formyl chloride; dichloromethane, an acid-binding agent and an alkyl alcohol / alkylphenol mixture are added into the adamantane formyl chloride obtained in the step 1 through a dropping funnel, the mixture reacts for 8-10 h at the temperature of 0-30 DEG C, adamantane formate is synthesized and can be used for preparing lubricating oil, and the method is easy and convenient to implement, high in reaction rate, high in product yield and high in purity.

The invention relates to a method for separating an n-propyl formate-n-propyl alcohol-water mixture by liquid-liquid phase separation coupling extractive distillation, which comprises the following steps of: dividing a raw material into a water phase and an organic phase by using a phase splitter based on the heterogeneous characteristic of an azeotropic system, and carrying out four-tower operation on a rectifying tower (C1), a rectifying tower (C2), a rectifying tower (C3) and a rectifying tower (C4) to obtain an n-propyl formate-n-propyl alcohol-water mixture. The efficient separation of the n-propyl formate-n-propyl alcohol-water mixture is realized. After separation, the molar fraction of n-propyl formate is greater than 99.99%, the molar fraction of n-propyl alcohol is greater than 99.99%, and the molar fraction of water is greater than 99.99%. The method provided by the invention realizes high-efficiency and low-energy-consumption separation of the n-propyl formate-n-propanol-water azeotropic mixture, and has economic benefits and environmental friendliness.

The invention discloses a polyurethane or polyurea aqueous dispersion with high humidity and heat resistance as well as a preparation method and application thereof. The aqueous dispersion is prepared by reacting the following components: a) polyester diol and / or polyol, b) di-and / or polyisocyanate which at least contains more than 50% by mass of toluene diisocynate, c) a monofunctional or polyfunctional polyethoxy chain segment-containing component which is synthesized by taking sodium methoxide as a catalyst and has reaction activity to isocyanate, and d) a polyethoxy chain segment-containing component which has reaction activity to isocyanate. D) a sulfonic acid type hydrophilic compound; e) a low molecular compound containing hydroxyl and containing at least two NCO reactive amino groups; wherein the ratio of the sodium ions in the component c) to the toluene diisocynate in the component b) is 10 ppm to 100 ppm. Sodium ions can catalyze a small amount of isocyanate groups to react with carbamate bonds to generate allophanate bonds in a polyurethane synthesis process, so that a trace cross-linked structure is introduced into a polyurethane chain segment, and the heat resistance / damp heat resistance of a product is improved.

The utility model relates to the related technical field of heat exchangers for formate preparation, and one embodiment of the utility model provides a heat exchanger for formate preparation, which comprises a bottom plate and a shell, the shell is fixed at the top of the bottom plate, connecting pipelines are respectively connected to the top and the bottom of the shell, and an outer cover is arranged outside the shell. The telescopic switch assembly is arranged between the outer cover and the shell, the heat exchange connecting assembly is arranged on the outer cover and comprises an installation groove, the installation groove is formed in the side surface of the outer cover, a sealing plate is installed in the installation groove, and a plurality of heat exchange pipelines are arranged on the surface of the sealing plate. By means of the technical scheme, the technical problem that in the prior art, due to the fact that the heat exchange pipes are fixed and difficult to detach, once corrosion damage occurs, the heat exchange pipes cannot be independently replaced, and the whole heat exchanger needs to be maintained or replaced generally is solved.

The invention discloses a palladium-based electrocatalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysis. The palladium-based electrocatalyst provided by the invention comprises a composite carrier and palladium particles, the palladium particles are loaded on the composite carrier; the composite carrier comprises a fusiform titanium dioxide carrier and reduced graphene oxide quantum dots; the reduced graphene oxide quantum dots are modified on the surface of the fusiform titanium dioxide carrier. Reduced graphene oxide quantum dots are introduced as a functional modifier of titanium dioxide to synergistically enhance metal-carrier interaction and induce generation of oxygen vacancies, so that the electrocatalytic oxidation performance on formate, ethanol and methanol is remarkably improved.

The present application provides a kind of isocyanate prepolymer composition and its preparation method which can be stably stored.The composition contains isocyanate prepolymer, phosphine compound.The phosphine compound does not react with isocyanate in the system, and can capture basic or metal catalyst in the prepolymer compound system to deactivate it, reduce the further reaction of isocyanate and carbamate / uretonimine crosslinking, and further reduce the generation of macromolecular polymer, reduce the viscosity and composition change of product, and thus improve the storage stability of product.

The invention discloses a method for recovering polycarbonate plastic to obtain an amine high-temperature antioxidant, and belongs to the technical field of plastic recovery. Aromatic amine is used as a nitrogen source, hydroboron and formate are used as in-situ hydrogen donors, and in an inert atmosphere and a heating environment, under the synergistic catalysis of a catalyst and a molecular sieve, the amine high-temperature antioxidant is prepared from polycarbonate based on a one-step method. The reaction path is simple, the selectivity is high, the amine high-temperature antioxidant taking diphenylamine and alkyl diphenylamine as main components can be directly obtained without multi-stage separation and intermediate preparation, and the requirements of simple process flow, low energy consumption and the like are met. The invention provides a high-valued way for polycarbonate recovery, also provides a large-scale raw material source for the field of high-temperature-resistant antioxidants for lubricating oil / fuel / rubber and high polymer materials, and has a wide application prospect.

The present invention relates to the use of a trivalent chrome plating bath composition for the electrodeposition of a hard chrome layer with a thickness of 1 µm or more, the composition comprising (A) trivalent chromium ions in an amount of 5-40 g / l, (B) at least one anion selected from sulfate, chloride, bromide and methanesulfonate, (C) at least one carboxylate ion selected from formate and acetate, (D) at least one buffer substance selected from ammonia, boric acid, carboxylic acids with 2 to 8 carbon atoms other than component (C) and salts thereof, and aluminium salts, and (E) 0.01 to 100 g / l of at least one specific compound which comprises a sulfonate group and a sulfide or disulfide group. Other aspects of the invention relate to a hard chrome plating process, a hard chrome plating layer and a hard chrome plated article.

The invention discloses a synthesis method of halauxifen-methyl. The halauxifen-methyl is obtained by carrying out Suzuki coupling reaction on 4-amino-6-bromo-3-chloro-5-fluoropyridine carboxylic acid benzyl ester and 4-chloro-2-fluoro-3-methoxyphenylboronic acid, a catalytic system adopted by the Suzuki coupling reaction is a palladium catalyst, a phosphine ligand and a phase transfer catalyst; wherein the phosphine ligand is 4-(anthracene-9-yl)-3-(tert-butyl)-2, 3-dihydrobenzo [d] [1, 3] oxaphosphorus pentadiene, and the phosphine ligand is 4-(anthracene-9-yl)-3-(tert-butyl)-2, 3-dihydrobenzo [d] [1, 3] The molar use amount of the palladium catalyst is 0.1 to 0.5 mol percent of the molar use amount of the 4-amino-6-bromo-3-chloro-5-fluoropyridine benzyl formate. According to the invention, AntPhos is used as a phosphine ligand to form a catalytic system together with the palladium catalyst and the phase transfer catalyst, so that higher reaction yield and product purity can be obtained with very low dosage of the palladium catalyst, the synthesis cost of the halauxifen-methyl can be greatly reduced, the reaction condition is mild, the energy consumption is lower, and the method is suitable for industrial production.

The application discloses a bismuth-based metal organic nanosheet material and a preparation method and application thereof, relates to the field of inorganic synthesis and the field of energy electrocatalysis technology. The preparation method is to use bismuth salt as a metal source, use amino succinic acid as an organic ligand, and prepare the bismuth-based metal organic nanosheet (Bi-MON) material by using a hydrothermal method. The Bi-MON material synthesized by the application presents an ultrathin nanosheet morphology, and the thickness is only 3 nm. Moreover, the preparation method is simple, does not need to add any surfactant or regulator, and does not use any organic solvent in the whole synthesis and post-processing process, so that green synthesis in the whole process is realized, the condition is mild, and the method is suitable for mass synthesis. Finally, the Bi-MON material synthesized by the application exhibits excellent electrocatalytic carbon dioxide reduction performance, and the faradic efficiency of formate generated under an industrial current density of 0.4 A·cm 2 -2 can reach 97.1%, and the Bi-MON material has a potential application prospect.

A method for preparing a NiCo-MOF anodic oxidation catalyst for matching cathode CO2 reduction is disclosed, belonging to the technical fields of electrocatalysis and fine chemical synthesis. Based on ion etching in a hydrothermal environment, a NiCo-MOF electrocatalyst with a uniform nanoflower-like structure was grown on the surface of substrates such as nickel foam. Benefiting from the modulating effect of cobalt on the electron cloud distribution of the active center nickel, this catalyst exhibits excellent catalytic activity for glycerol oxidation and glucose oxidation, achieving up to 400 mA cm⁻¹ at only 1.398 V. ‑2 The industrial-grade current density has a Tafel slope of only 42.3 mV dec. ‑1 The catalyst exhibited no performance degradation after 100 hours of stable cycling, with a Faradaic efficiency exceeding 90% for the main product, formic acid. This catalyst demonstrates a simple synthesis method, low cost, good catalytic activity and selectivity, and excellent stability, showing promising industrial application prospects in the co-production of formate using small-molecule electro-oxidation coupled with carbon dioxide electroreduction.

The invention relates to the technical field of metal organic framework material preparation, and provides a metal organic compound and a preparation method thereof.The molecular formula of the metal organic compound is Zr6Om (OH) n (OL) 6-(x + y) / 2 (sol) x (blank) yNb, m is larger than or equal to 4 and smaller than or equal to 6, n is larger than or equal to 0 and smaller than or equal to 4, x is larger than or equal to 0.09 and smaller than or equal to 0.92, y is larger than or equal to 1.8 and smaller than or equal to 6.02, and b is larger than or equal to 0.9 and smaller than or equal to 6.94; wherein OL is a dicarboxyl conjugated organic ligand, sol comprises at least one of acetate, formate and CH3 (CH2) pCOO-, p is greater than or equal to 1 and less than or equal to 6, bank is a ligand vacancy, and N is a counter ion; the unsaturated coordination defect rate of the metal organic compound is 15%-50.1%.

To provide a hydraulic composition that can be fully cured to yield a cured product having excellent gloss.SOLUTION: A hydraulic composition comprises a urethanization catalyst, an active hydrogen-containing compound having more than one active hydrogen in one molecule (excluding the urethanization catalyst and water), a polyisocyanate compound having more than one isocyanate group in one molecule, a hydraulic cement, and water, wherein the urethanization catalyst is an amine compound having at least one structure selected from the group consisting of a structure represented by the following formula (1-1) and a structure represented by the following formula (1-2) (wherein R1 and R2 are each independently an organic group or a hydrogen atom): -C(CH3)2-NR1-C(CH3)2- (1-1) and -C(CH3)2-N(OR2)-C(CH3)2- (1-2).SELECTED DRAWING: None

This invention discloses a method for preparing raloxifene EP impurity B, comprising the following steps: dissolving 6-methoxy-2-(4-methoxyphenyl)benzothiophene (Ⅰ) as a raw material in solvent one, adding NIS, and then adding a free radical initiator to react and obtain intermediate III; dissolving 4-[2-(1-pyrrolidinyl)ethoxy]benzoate salt (II) in solvent two, adding solvent two or not, and then adding a chlorinating agent to react and generate intermediate IV; dissolving intermediate III in solvent three, adding a Lewis acid, and then adding intermediate IV, and performing a Friedel-Crafts acylation reaction to generate intermediate V; dissolving intermediate V in solvent four, adding a demethylating agent, and generating bisphenol hydroxyl intermediate VI under demethylation conditions; dissolving intermediate VI in solvent five, adding a reducing agent, and generating intermediate VII through a reduction reaction; dissolving intermediate VII in formic acid, stirring, evaporating, and finally lyophilizing to generate the formate target product VIII.

Disclosed are naphthyl compounds comprising a ureido piperidine-1-carboxamide or ureido piperidine-1-formate moiety, compositions thereof, and methods of use thereof for treating or preventing diseases or conditions associated with abnormal levels of amino acids, such as phenylketonuria, hyperphenylalaninemia, diabetes, and chronic kidney disease, by modulating SLC6A19 transport.

This invention discloses a water-based formate annular protective fluid for deep-sea oil and gas field development and its preparation method, specifically relating to the field of chemical corrosion prevention in oil and gas field development. The fluid comprises the following raw material components by mass percentage: 15wt%-40wt% organic-inorganic salt composite base fluid, 3wt%-8wt% green composite corrosion inhibitor, 2wt%-5wt% composite oxygen scavenger, 1wt%-3wt% zwitterionic bactericide, 2wt%-4wt% composite scale inhibitor, 0.5wt%-2wt% high-pressure stabilizer, 0.3wt%-1.5wt% environmental synergist, 1wt%-3wt% natural gas hydrate inhibitor, with the balance being deionized water. This invention, by employing a specific compounded high-pressure stabilizer and an optimized composite salt-based liquid, can withstand high-pressure environments exceeding 30 MPa and maintain excellent physical and chemical stability within an extreme temperature fluctuation range of -10°C to 180°C. After testing at 180°C for 168 hours, the liquid showed no stratification, no precipitation, and minimal density change, demonstrating its outstanding thermal stability and pressure resistance, making it fully adaptable to the harsh working conditions in the deep sea, from low temperatures on the seabed to high temperatures at the bottom of wells.

The application discloses a DMF waste liquid treatment method, and generates high-acidity DMF rectification liquid in the DMF waste liquid treatment process. The treatment method comprises the following steps: controlling the water content in the DMF rectification liquid to be 0.05%-1% and the acidity to be 2%-10%; adding an alkaline substance to the DMF rectification liquid at 20-30 DEG C, uniformly mixing, controlling the pH value of the system to be 7-9, and reacting formate in the DMF rectification liquid with the alkaline substance to generate formate salt; reducing the temperature of the system to 0-10 DEG C, continuously stirring, and crystallizing and separating out the formate salt in the system; solid-liquid separation and separately recovering the formate salt solid and the DMF liquid; post-treatment of the formate salt: drying the formate salt obtained through solid-liquid separation after cleaning with an alcohol substance; and subsequently recovering residual DMF in the alcohol substance through concentration. The DMF waste liquid treatment method of the application obtains DMF material with greatly reduced acidity and highly concentrated formate salt, the DMF material can be further purified and recovered, and the formate salt, after impurity removal and drying through washing, can be sold as raw material.

This invention discloses a catalyst and method for the continuous synthesis of formamide from ammonium carbonate or ammonium bicarbonate, belonging to the field of chemical technology. The catalyst is a boron-nitrogen co-doped activated carbon supported palladium catalyst prepared by using a palladium precursor, boric acid, and nitrogen-doped activated carbon. The method uses ammonium carbonate solution or ammonium bicarbonate solution as raw material, and in a continuous flow reactor, the above-mentioned catalyst catalyzes the hydrogenation of ammonium carbonate or ammonium bicarbonate to synthesize formate. The formate is then dehydrated to obtain formamide. The catalyst of this invention has advantages such as high activity and high stability, and can efficiently and stably produce ammonium formate in a continuous flow reactor, which can then be further dehydrated to obtain formamide, thus providing a green, low-carbon, and safe method for the synthesis of formamide.

The invention discloses a preparation method of a 1-O-glycosyl carbamate compound. The invention provides a preparation method of a 1-O-glycosyl carbamate compound, which comprises the following steps: (1) carrying out carbamic acid reaction on an amine compound and carbon dioxide in a solvent under an alkali condition; and (2) after the reaction in the step (1) is finished, carrying out glycosylation reaction with halogenated glycoside to obtain the corresponding 1-O-glycosyl carbamate compound. The preparation method provided by the invention has one or more advantages as follows: the reaction raw materials are easy to obtain, the operation is simple and convenient, the reaction effect is good, and the 1-O-glycosyl carbamate compound can be stereoscopically and specifically obtained.