113 results about "Formate" patented technology

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 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.

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 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.

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%.

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.

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.

A polyol composition comprising: (A) a polyol comprising at least one selected from the group consisting of polycarbonate polyols and polyester polyols; (B) a urethane-forming metal catalyst; (C) at least one carbonyl compound selected from the group consisting of carboxylic acids, carboxylic acid anhydrides, and beta-diketones; and (D) a hindered amine light stabilizer, wherein the content of volatile organic compounds is 0-10 mass%.

The invention discloses a drilling fluid additive, the drilling fluid additive is composed of a coating agent and an inhibitor, the coating agent is grafted with a monomer with a strong hydration group and / or a polygonal stable structure, and the inhibitor is composed of formate and NaCl. The invention also discloses a preparation method and application thereof. The drilling fluid additive provided by the invention is used for preventing drilling accidents such as well leakage, well collapse and the like caused by increase of density and viscosity of the drilling fluid due to the fact that drilling cuttings are hydrated and dispersed in the drilling fluid to form a harmful solid phase in the drilling process, so that the drilling fluid keeps good performance, and the drilling efficiency is improved.

The application belongs to the field of secondary batteries, and particularly relates to a zinc ion battery electrolyte. The composition of the electrolyte comprises water, a zinc salt, a formate salt and an amine molecule. The electrolyte of the application can induce uniform zinc deposition and present (0002) crystal face preferred orientation due to the addition of the formate salt and the amine molecule, and inhibit the formation of zinc dendrites. The zinc ion battery prepared by using the electrolyte has uniform and smooth zinc morphology in the charging and discharging cycle process, greatly improves the cycle stability, and has a simple scheme, is easy to industrialize, and has application prospects in the field of energy storage technology.

The invention provides an application of a benzoate compound in a synthesis process of copper phthalocyanine, which comprises the following steps: S1, adding 3g of benzoate compound, 310g of 100% phthalic anhydride, 231g of urea and 1500ml of solvent alkylbenzene into a 3000ml three-neck bottle provided with a stirring device, a thermometer and a condenser, uniformly heating to 170 DEG C within 4 hours while stirring, and keeping the temperature for 2 hours; s2, 231 g of urea is added, the temperature is evenly increased to 190 DEG C within one hour, and heat preservation is conducted for 2 hours; s3, adding 61 g of 100% cuprous chloride and 4 g of 100% ammonium molybdate, uniformly heating to 210 DEG C within 5 hours, carrying out heat preservation and stirring reaction for 6 hours, and cooling to 100 DEG C; according to the application of the benzoate compound in the synthesis process of the copper phthalocyanine, a proper amount of the benzoate compound is added in the synthesis process of the copper phthalocyanine, so that the product yield is increased, the consumption of raw materials is reduced, and the emission of three wastes is reduced, and therefore, the production cost is reduced, and the pollution to the environment is reduced.

The present invention provides a novel 5-fluoro-1-[(2-fluorophenyl)methyl]-1H-pyrazolo [3, 4-b]pyridine-3-carboximidamide formate compound of formula (IV) and process for preparation thereof. The present invention further provides for the use of compound of formula (IV) for the preparation of vericiguat compound of formula I. The present invention also relates to process for the preparation of vericiguat Modification form II, vericiguat Modification form III, vericiguat monohydrate and dihydrate.

The application discloses a Ni-based catalyst, a preparation method and application of the Ni-based catalyst in methanol electrochemical oxidation reaction, and particularly provides a preparation method of Ni5(II)O(OH)8, realizes artificial synthesis of Ni5(II)O(OH)8 for the first time, and the Ni5(II)O(OH)8 is used as a main active phase of methanol electrochemical oxidation; the unique crystal structure of the Ni5(II)O(OH)8 makes the Ni5(II)O(OH)8 have significantly enhanced intrinsic oxidation resistance after being coupled with FeOOH, and effectively inhibits irreversible conversion of Ni(II) to high-valence Ni species such as NiOOH at an oxidation potential. The application further provides a Ni5(II)O(OH)8 / FeOOH catalyst with a core-shell heterostructure, and an interface structure with a crystal lattice matching relationship is formed between the Ni5(II)O(OH)8 and the FeOOH. When the Ni5(II)O(OH)8 and the Ni5(II)O(OH)8 / FeOOH are applied to methanol electrochemical oxidation reaction for preparing formate, compared with a traditional nickel-based catalyst, the Ni5(II)O(OH)8 and the Ni5(II)O(OH)8 / FeOOH have a lower current response starting potential and a higher current density at the same potential. The application provides a new type of high-stability electrocatalyst for methanol electrochemical oxidation for preparing formate.

The present application provides a kind of singlet oxygen activated photo-cage chemiluminescence molecule, which has the structure shown in formula (I), wherein X is hydrogen or halogen, PC represents photo-cage group, R 1 It is an electron-withdrawing group containing oxygen and / or nitrogen, R 2 It is selected from adamantane, cyclobutane, methyl cyclobutyl formate and tetrahydrothiopyran-1,1-dioxide. The chemiluminescence molecule is activated by singlet oxygen and triggered by light of a specific wavelength, and through the processes of oxidation, photolysis, electron transfer, etc., an excited state benzoate structure is generated, which emits blue-green light when returning to the ground state. 2 Group, photo-cage group and R 1 Electron-withdrawing group synergistic effect, oxidation, photolysis, electron transfer, etc. process, generate excited state benzoate structure, it emits blue-green light when returning to the ground state.

The present invention relates to an aromatic acyl formate oxime ester photoinitiator suitable for LED photopolymerization. The photoinitiator has a structure represented by general formula (I), wherein Ar1, Ar2 and R1 are as defined in the description and claims. The present invention also relates to a preparation method for the photoinitiator and a use thereof in an LED photopolymerization system.

This invention discloses a method for preparing tris(perfluoroalkylsulfonyl)methane. The preparation method includes the following steps: the intermediate shown in formula [5] reacts with an oxidant under the action of a catalyst to generate tris(alkylsulfonyl)methane shown in formula [6]. The tris(alkylsulfonyl)methane shown in formula [6] is then electrolytically fluorinated to obtain tris(perfluoroalkylsulfonyl)methane represented by formula [1]. The reaction formula and definition are detailed in the specification. The obtained tris(perfluoroalkylsulfonyl)methane reacts with an alkali metal salt or a base in an organic system to obtain tris(alkylsulfonyl)formate shown in formula [2]. The reaction formula and definition are detailed in the specification. The preparation method provided by this invention has the advantages of inexpensive and readily available raw materials, high yield, mild reaction conditions, and suitability for industrial application.