187 results about "Formate Esters" patented technology

The present invention relates to the technical field of coatings and discloses a method for preparing an EVA waterproof coating. Activated montmorillonite reacts with toluene diisocyanate to obtain isocyanate-modified montmorillonite. EVA is hydrolyzed under the catalysis of potassium hydroxide to obtain hydroxylated EVA. An epoxy trisiloxane intermediate reacts with terephthalic acid under ring-opening esterification with benzyltriethylammonium chloride to obtain p-hydroxytrisiloxane benzoate. P-hydroxytrisiloxane benzoate, hydroxylated EVA, and isocyanate-modified montmorillonite are cross-linked with toluene diisocyanate under the catalysis of stannous octoate, and a defoamer and a dispersant are added thereto and stirred uniformly to obtain an EVA waterproof coating. The EVA waterproof coating prepared by the present invention has good mechanical properties and waterproof properties.

The invention relates to the field of biomass energy and chemical industry, in particular to an efficient methanol preparation method based on biomass graded catalytic conversion and cycle coupling. The method comprises the following steps: in a graded catalytic oxidation reaction system, mixing a biomass raw material with a composite vanadium-based catalyst, water, oxygen and circulating methanol for reaction to generate a gas-liquid mixture containing methyl formate; recycling methyl formate by using a gradient variable-pressure rectification separation system; carrying out an interface hydrogenation reaction under the action of a copper-zinc-LTA hierarchical pore catalyst to generate methanol; finally, part of methanol is purified and recycled through membrane separation. The method realizes efficient conversion from biomass to methanol, has the advantages of mild reaction conditions, low energy consumption, high yield and good catalyst stability, and opens up a new path for industrialization of preparation of methanol from biomass.

Disclosed in the present invention are a branched-chain-containing long-carbon-chain polyester elastomer based on biomass-based 2,5-furandicarboxylic acid, and a preparation method therefor. Monomers for preparing the polyester elastomer comprise 2,5-furandicarboxylic acid or 2,5-furandicarboxylic acid ester, a dihydric alcohol and a branched-chain-containing long-carbon-chain dibasic acid. The preparation method comprises: (1) performing a melting reaction on furandicarboxylic acid or an ester thereof, a branched-chain-containing long-carbon-chain dibasic acid and a dihydric alcohol to prepare an oligomer; and (2) performing melt polycondensation on the oligomer to synthesize a furandicarboxylic acid-based branched-chain-containing long-carbon-chain polyester elastomer. By means of the branched-chain-containing long-carbon-chain polyester elastomer of the present invention, the molecular structure can be effectively designed, and the molecular weight can be regulated, thereby optimizing mechanical properties, thermal properties, barrier properties, etc. The preparation process thereof is simple, convenient and safe, and the equipment requirements and catalysis cost are relatively low. The raw material 2,5-furandicarboxylic acid used in the present invention is a potential substitute for terephthalic acid, is derived from biomass, has a wide range of sources and is environmentally friendly.

The invention relates to the technical field of catalyst materials and discloses a low-temperature catalyst for preparing methyl formate through methanol dehydrogenation as well as a preparation method and application of the low-temperature catalyst. The low-temperature catalyst comprises Cu nano-particles and a composite metal oxide attached outside the Cu nano-particles, the composite metal oxide comprises CaO and CeO2. When the low-temperature catalyst disclosed by the invention is used for catalyzing methanol dehydrogenation to prepare methyl formate, the reaction can be realized at a relatively low temperature, and the low-temperature catalyst has relatively high methyl formate selectivity.

The continuous production heat pump assisted integrated extractive distillation device is adopted to realize high-purity separation and recovery of the diethyl ether-methyl formate-n-pentane azeotrope, and separation is realized by utilizing the characteristic that the extraction agent has great influence on the relative volatility of the diethyl ether-methyl formate-n-pentane azeotrope. The purity of the separated diethyl ether, n-pentane and methyl formate reaches 99.9% or above, high-purity recycling of the extraction agent can be achieved, the separation cost is greatly reduced, and the method is low in energy consumption and flexible to operate.

Lipid composition comprising: (i) one or more cationic lipids, preferably cationically ionizable lipids, (ii) one or more phospholipids, and (iii) one or more statistical copolymers comprising repeating units of the following formula (I-a) and repeating units of formula (II-a) wherein R1 represents a hydrogen atom or a group selected from a C1-3 alkyl group, a cyclopropyl group, and a C3 alkenyl group; R2 represents a group selected from a saturated C4-40 hydrocarbyl group; an unsaturated C4-40 hydrocarbyl group having one or more carbon-carbon double and / or triple bonds; a saturated C4-40 heterohydrocarbyl group containing 1 to 5 divalent groups selected from ether, thioether, sulfone, sulfoxide, keto, ester, amide, carbamate and carbonate groups, and / or 1 to 5 fluorine atoms as substituents; and an unsaturated C4-40 heterohydrocarbyl group having one or more carbon-carbon double and / or triple bonds, and containing 1 to 5 divalent groups selected from ether, keto, ester, and carbonate groups and / or 1 to 5 fluorine atoms as substituents; and x and y independently represent 0 or 1.

The present invention discloses a furandicarboxylate bio-based crosslinkable elastomer and a preparation method thereof. The preparation method comprises: uniformly mixing furandicarboxylate or furandicarboxylate, a linear saturated dibasic acid or linear saturated dibasic acid ester, a linear unsaturated dibasic acid or linear unsaturated dibasic acid ester, and a diol; adding a catalyst and an antioxidant; heating the mixture to above 150°C; gradually heating the mixture under an inert atmosphere; and reacting the mixture at 150-190°C for 3-7 hours to obtain an intermediate product; stirring the intermediate product for a polycondensation reaction at a vacuum degree of 30-400 Pa and a temperature of 200-260°C for 3-8 hours to obtain a crude product; and dissolving, washing, and drying the crude product to obtain a finished product. The polyfurandicarboxylate bio-based elastomer prepared by the present invention has good mechanical properties and processing properties; and the composite material after crosslinking and filler reinforcement can greatly improve tensile strength, good resilience, low permanent deformation, and high tensile strength.

The invention relates to the technical field of organic synthesis, and particularly provides a thiophene-containing tetraarylethene compound as well as a preparation method and application thereof. According to the invention, two phenyl groups of tetraphenylethylene are replaced by methyl formate thiophene groups, and the substituted tetraarylethylene compound has more remarkable photochromic and mechanochromic dual functions through the interaction of a specific substituent group at the position 2 of thiophene and a large conjugated group formed by four aromatic rings; and light-operated double-color display in a polymer mechanism can be realized. The mechanochromism of the compound does not depend on ultraviolet light, when the compound is subjected to mechanical force, the molecular accumulation mode and conjugate planarity are changed, and the color change can be directly observed by naked eyes. Different from traditional tetraphenyl ethylene force-induced discoloration recessive fluorescence change, the dominant color change can be used in the fields of visual stress monitoring, anti-counterfeiting marks, inkless writing materials, safe ink and the like in ultraviolet-free environments (such as indoor and closed spaces), and the application prospect is wide.

To provide a method, a perfuming composition and a perfumed consumer product for imparting long-lasting properties for standard perfumery raw materials which are too volatile or have a poor substantivity by themselves or which are only deposited in a small amount on the surface of the final application.SOLUTION: The present invention relates to compounds of formula (I) as properfume compounds. In particular, the present invention relates to a method of releasing a compound, namely, a carbonyl, a formate ester and / or an alcohol represented by specific formulas, by exposing the compound of formula (I) to an environment in which it is oxidized. Moreover, the present invention relates to a perfuming composition and a perfumed consumer product comprising at least one compound of formula (I).SELECTED DRAWING: None

The invention relates to the field of organic synthesis, in particular to a synthetic method of (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate. The synthesis method of (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate comprises the following steps: mixing a material A, a material B, potassium carbonate, sodium iodide and a solvent, and reacting to obtain a material C; mixing the material C, the material D, triethylamine and a solvent, and reacting to obtain a material E; mixing the material E, ammonia water and a solvent, and reacting to obtain a material F; and mixing the material F, di-tert-butyl dicarbonate, a palladium carbon catalyst and a solvent, and carrying out a reaction to obtain the (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate. The process route is easy to operate and has no special dangerous reaction. Reaction materials are cheap and easy to obtain, and the prepared product is high in purity.

The present invention provides a blowing agent for producing extruded polystyrene foam having low lambda over time and low foam density. [Solution] The foaming agent comprises (a) a first co-foaming agent consisting of (a) about 50% to about 70% by weight of HFO and / or HFCO having three or four carbon atoms, (b) about 2% to about 15% by weight of methyl formate, (c) a second co-foaming agent consisting of about 20% to about 30% by weight of dimethyl ether, isobutane and combinations thereof, and (d) a third co-foaming agent consisting of about 2% to about 25% by weight of carbon dioxide, acetone and combinations thereof.

The invention discloses a kind of recycling polypropylene to prepare high-impact material and preparation method thereof, relate to the field of materials. When the present invention uses recycling polypropylene to prepare high-impact material, first, polypropylene is grafted with vinyl diphenylphosphine, then reacted with 1-(3-chlorophenyl)-2-propyn-1-ol, and then reacted with 6-(methyl formate) pyridine-3-boric acid to obtain modified polypropylene; Secondly, calcium carbonate pretreated with 3-aminopropyltrimethoxysilane and 3-thiophene carboxaldehyde are reacted, and thiophene, 6-(thiophene-2-yl) pyridine-2-carboxylic acid, and 6-(3-thienyl) pyridine-2-carboxaldehyde are polymerized on the surface of calcium carbonate to obtain modified calcium carbonate; Finally, recycled polypropylene, modified polypropylene, modified calcium carbonate, sodium cyanide, and bismaleimide are melt-blended, and then extrusion granulation is performed to obtain high-impact material; The high-impact material prepared by the present invention has good impact resistance, anti-aging performance and antibacterial performance.

The invention discloses a dual stimulus-responsive supramolecular gel temporary plugging agent and a preparation method thereof, and relates to the technical field of oil-gas field development. The supramolecular gel temporary plugging agent comprises the following components in percentage by mass: 5wt%-10wt% of a tertiary amine surfactant; the temperature response authigenic acid accounts for 0.2 wt%-2wt%; and the balance of water. Wherein the tertiary amine surfactant is prepared by reacting fatty acid and N, N-dimethyl-1, 3-diaminopropane according to the molar ratio of 1: 1, and the temperature response authigenic acid is composed of methyl formate, ethyl formate, methyl acetate, ethyl acetate and the like; the dual-stimulus-responsive supramolecular gel temporary plugging agent disclosed by the invention has the plugging strength of 4.3 MPa, takes water as a solvent, and is simple in process, high in yield, strong in environmental protection property, stable in performance and low in cost.

The invention discloses (E)-1, 4-diether olefin and a preparation method thereof, and the (E)-1, 4-diether olefin is obtained by using 1, 3-diene as a raw material and carrying out electrochemical reaction in the presence of an electrolyte and a solvent, wherein the 1, 2, 4-trimethyl-1, 3- The structural formula of the 1, 3-diene is as follows: R1 is phenyl, p-fluorophenyl, p-chlorphenyl, p-bromophenyl, p-methylphenyl, p-methoxyphenyl, p-trifluoromethylphenyl, p-trifluoromethoxyphenyl, p-acetoxyphenyl, p-methyl formate phenyl, p-cyanophenyl, p-pinacol borate phenyl, p-phenylphenyl, o-oxybenzyl phenyl and o-methoxyphenyl; r1 is one of 1, 2-naphthyl; the solvent is a mixed solvent containing methanol. The preparation method of (E)-1, 4-diether olefin has high E-selectivity and 1, 4-selectivity, and an electro-catalysis mode is adopted, so that the use of a stoichiometric toxic, expensive or dangerous oxidant is avoided.

The present invention relates to an emulsion formulation comprising thiencarbazone-methyl or a pesticide-acceptable salt thereof, one or more organic water-immiscible solvents, one or more organic water-miscible solvents selected from linear and cyclic carbamate esters, one or more emulsifiers, and one or more organic bases, wherein the formulation exhibits a pH of 5.5 to 9.

The present invention discloses a Ru-M@Al-MCM-41 catalyst and its preparation method and application. The present invention uses microspherical Al-MCM-41 as a carrier, confines the active component Ru and the auxiliary component M in the molecular sieve pores by strong electrostatic adsorption, and then reduces to obtain the Ru-M@Al-MCM-41 catalyst; the catalyst morphology is porous spherical. The Ru-M@Al-MCM-41 catalyst of the present invention has high activity and high stability and has good industrial application prospects. The catalyst of the present invention is used to catalyze the hydrogenation of pyromellitic acid esters to prepare hydrogenated pyromellitic acid esters, and the conversion rate of the substrate pyromellitic acid ester is high, and the selectivity of the target product hydrogenated pyromellitic acid ester is high.

A tung oil-based polyurethane epoxy toughening agent, its preparation method, and its application are disclosed. The chemical structure is shown below: R1 is a methyl tungate molecular chain, and R2 is a backbone molecule in diisocyanate. The preparation method involves reacting methyl tungate with diethanolamine to obtain diethanol tungamide; the diethanol tungamide is then reacted with diisocyanate and glycidyl ether to obtain an epoxy-terminated tung oil-based polyurethane epoxy toughening agent. This toughening agent can react with a curing agent, covalently integrating into the epoxy resin curing network, improving the compatibility between the toughening agent and the epoxy resin, and avoiding problems such as decreased material transparency due to phase separation. Furthermore, the structure contains amide, urethane, and conjugated triene structures, which can form sacrificial bonds such as hydrogen bonds and π-π interactions with the epoxy resin matrix. This can improve the toughness of the epoxy resin while mitigating the adverse effects of flexible long carbon chains on the strength and other properties of the epoxy resin.

The application discloses a preparation method of 2-pyrimidine methyl formate. The application provides a preparation method of 2-pyrimidine methyl formate, which comprises the following steps: step (1), 2-cyanopyrimidine and methanol are reacted in the presence of water and acid; and step (2), a dehydrating agent is added into the reaction solution in step (1) to prepare 2-pyrimidine methyl formate. The preparation method has one or more advantages of simple operation, high yield, high purity, low cost and suitability for industrial production.

The invention discloses a high-toughness regenerated plastic dropper material based on a waste mulching film and a preparation method of the high-toughness regenerated plastic dropper material, belongs to the technical field of material regeneration, and is used for solving the technical problem that the tensile property and the impact resistance of a regenerated plastic dropper material in the prior art need to be further improved. According to the invention, a silica ion reinforcing component, boric acid ester modified regenerated polyethylene and hydroxyl carbamate flexible polyurethane are synergistically compounded, and a multi-scale structure system in which an inorganic-organic hybrid constraint structure, a dynamic reversible connection unit and a flexible dissipation channel are combined is constructed in the material; the material forms a stable interface coupling and continuous stress transfer path in the melting processing and service stress process, so that the material gives consideration to structural bearing, morphology stability and energy distribution capability, and is suitable for plastic dropper products with comprehensive requirements on mechanical properties and heat resistance.

The invention relates to the technical field of dispergators, and discloses a dispergator and a preparation method and application thereof, the dispergator comprises the following components by mass: 50-100 parts of a penetrant, 50-100 parts of a swelling agent, 10-20 parts of a dispersant, 0.1-1 part of a surfactant A, 0.1-1 part of a surfactant B, and 1-5 parts of a catalyst; the penetrant is composed of methyl formate, ethanol, ethyl acetate, acetone and dichloromethane; the swelling agent is prepared from N-methyl pyrrolidone, dimethyl sulfoxide, tetrahydrofuran, N, N-dimethyl formamide, N, N-dimethyl acetamide, hexamethylphosphoric triamide and xylene. By compounding the penetrating agent, the swelling agent, the dispersing agent, the surfactant and the catalyst, the obtained dispergator can decompose an epoxy resin adhesive at a higher dispergation speed in the process of disassembling the retired battery pack.

The present invention relates to a method for preparing phthalic acid esters. The method for preparing phthalic acid esters comprises the following steps: first, acetaldehyde and ethyl acrylate undergo a Bayes-Hillman reaction in the presence of triethylenediamine as a catalyst to produce an enester; second, the enester produced in the first reaction undergoes a one-step dehydration and Diels-Alder reaction with ethyl acrylate to produce cyclohexene dicarboxylic acid ester; and third, the cyclohexene dicarboxylic acid ester undergoes a dehydrogenation reaction in the presence of a metal catalyst to produce the phthalic acid ester. The method has simple reaction conditions, readily available catalysts, and low cost, and is a biomass-based method for synthesizing plasticizers with great industrial potential.

This invention discloses a heat-insulating, high-temperature-resistant polyurethane rigid foam material and its low-temperature preparation method, which relates to the field of polyurethane foam materials. Bismaleimide powder is liquefied and dispersed in a polyol through a DA reaction. Lewis acid catalysis shortens the reaction time and is reused as a foaming catalyst. Combined with the excellent high- and low-temperature performance of the polyol, a thermoreversible DA adduct is introduced to achieve endothermic temperature control during the foaming process and low-temperature reconstruction of a rigid cross-linked structure. A low-boiling point primary foaming agent is compounded with methyl formate to reduce the heat of vaporization and system viscosity, and the A / B material preparation temperature is controlled to ≤15°C to avoid foaming agent loss. This solution solves the problems of powder dispersion, viscosity control, and foaming stability at low temperatures, imparting excellent heat-insulating and high-temperature-resistant foam properties.

The invention relates to the technical field of organic chemical synthesis, in particular to a catalyst and a process for preparing methyl glycolate and co-producing methyl formate through methanol dehydrogenation coupling oxalate hydrogenation, which comprises the following steps: S1) providing a coal-to-ethylene glycol device which comprises a methanol rectifying tower, a DMO synthesis system, a DMO refining system, a DMO hydrogenation reactor and a condensing system; s2) taking methanol extracted from a methanol rectifying tower as a raw material, and carrying out anaerobic dehydrogenation reaction under the action of the catalyst in any one of claims 1-2 or the catalyst prepared by the preparation method in claim 3 to obtain methyl formate, H2 and CO; and S3) by taking dimethyl oxalate extracted from a DMO refining system as a raw material, carrying out hydrogenation reaction under the action of the catalyst in any one of claims 4-5 or the catalyst prepared by the preparation method in claim 6 to obtain methyl glycolate and methanol.

The invention relates to the technical field of industrial methyl formate preparation, and particularly discloses carbon monoxide gas pretreatment and impurity removal equipment for industrial methyl formate preparation, the side face of a tower body is fixedly connected with a feeding component, the top of the tower body is fixedly connected with an exhaust port, the inner side of the tower body is fixedly connected with a spraying component, and the spraying component is fixedly connected with a gas outlet. The side face of the spraying part is fixedly connected with a water pipe. The carbon monoxide gas pretreatment and impurity removal equipment for industrial methyl formate preparation is provided with a contact mechanism, an arc-shaped contact plate is attached to the inner wall for cleaning, impurities are prevented from being attached and gathered on the tower body, the stable spraying and impurity removal efficiency is guaranteed, a second spring buffer structure can resolve overlarge extrusion force, the contact plate is prevented from rubbing the inner wall of the tower body, and the service life of the tower body is prolonged. The service life of equipment is prolonged, the cleaning range is complemented in the reset process of the triangular scraping plate, the blind area problem caused when a single contact plate moves downwards is solved, and inner wall cleaning under all working conditions is achieved.

This invention relates to a heteropolyacid catalyst for the condensation of formaldehyde and methyl formate to methyl glycolate, the preparation method of which includes the following steps: (1) loading the active component and (2) overflow hydrogen reduction. This invention uses common silica as a support and employs a co-impregnation method to load the active component to prepare the catalyst, under mild conditions and with a stable and controllable process. By doping with an appropriate amount of metal, overflow hydrogen is induced to reduce some coordinating atoms in the heteropolyacid as basic sites, which synergistically interact with the strongly acidic sites of the heteropolyacid to promote the cross-condensation of formaldehyde and methyl formate, thereby improving the reaction activity and selectivity. The prepared catalyst has advantages such as low reaction temperature, high activity, and good selectivity.

The invention discloses a rosin-based ionic liquid adhesive and a preparation method thereof, and belongs to the technical field of adhesive materials. According to the invention, a rosin derivative is adopted as a raw material and is converted into a high-performance adhesive through a series of amidation, carbamic acid esterification, quaternization and anion exchange reactions. The adhesive prepared by the invention shows strong and long-acting adhesion performance on various base materials (metal, wood, glass, ceramic and the like), and the maximum adhesion strength can reach 13.77 MPa. Based on the temperature sensitive characteristic, the adhesive can still keep stable reversible adhesion after being recycled for 10 times, and has excellent solvent resistance, moisture resistance and flame retardance. The rosin-based ionic liquid adhesive prepared by the invention not only has a wide application prospect in the fields of heterogeneous material connection, cultural relic repair and the like, but also provides a sustainable strategy for developing a high-performance bio-based adhesive.

The invention belongs to the technical field of fatty acid methyl ester conversion, and discloses a method for preparing long-chain alpha-olefin and co-producing fatty aldehyde and formic acid from fatty acid methyl ester. The method comprises the following steps: carrying out hydrogenation reaction on fatty acid methyl ester to generate fatty alcohol and methanol; carrying out dehydration / dehydrogenation reaction on the fatty alcohol to obtain long-chain alpha-olefin, fatty aldehyde, water and hydrogen; carrying out dehydrogenation reaction on the methanol to generate methyl formate and hydrogen; carrying out hydrolysis reaction on the methyl formate to obtain formic acid and methanol; wherein the catalyst used in the dehydration / dehydrogenation reaction of the fatty alcohol comprises a dehydrogenation active site, a dehydration active site, a dispersing aid and a carrier; the dispersity of the dehydrogenation active site is greater than 31.0%; the concentration of the dehydration active site is 4.5 to 9.0 [mu] mol / g. Three high-added-value products of long-chain alpha-olefin, fatty aldehyde and formic acid can be simultaneously produced by using the single raw material fatty acid methyl ester, the comprehensive utilization rate of byproducts in the process is high, zero discharge of wastewater in the process is realized, and balanced utilization of the raw material and the products is achieved.

The present application relates to the technical field of tail gas treatment of pesticide compound production, and particularly relates to a tail gas absorption system in cyanamide methyl formate production process, comprising: a tail gas collecting pipeline, a pretreatment unit, a deep purification unit and a detection device; wherein the pretreatment unit comprises a dust removal tower for cooling and dedusting the tail gas; the deep purification unit comprises an absorption tower made of stainless steel, PPH or glass steel, which is used for purifying the tail gas and treating toxic and harmful substances in the waste gas; the detection device is used for real-time monitoring of tail gas emission indexes to ensure standard emission. The technical scheme can quickly and effectively adsorb and purify the tail gas generated in the cyanamide methyl formate production process, has high adsorption performance, and also has large adsorption capacity and excellent selectivity.

A method for preparing a recycled raw material uses a waste copolyester. The method for preparing a recycled raw material includes (1) depolymerizing a waste copolyester to obtain a first reactant; (2) removing impurities present in the first reactant to obtain a second reactant; (3) distilling the second reactant to obtain a third reactant containing crude recycled bis-2-hydroxyethyl terephthalate and a fourth reactant containing a recycled diol-ester; and (4) mixing the third reactant with an aqueous solvent and recrystallizing it to obtain a fifth reactant containing recycled bis-2-hydroxyethyl terephthalate and a filtrate.