798 results about "Methyl formate" patented technology

An environmentally clean dual fuel for an internal combustion engine, comprising acetylene as a primary fuel and a combustible fuel, such as one or more fluids selected from an alcohol such as ethanol, methanol or any other alcohol or alcohols from the group comprising C1-C20 carbon chains, ethers such as from the group comprising dimethyl ether, diethyl ether, methyl t-butyl ether, ethyl t-butyl ether, t-amyl methyl ether, di-isopropyl ether and the like, low-molecular-weight esters such as from the group comprising methyl formate, methyl acetate, ethyl acetate, methyl propionate, ethyl propionate and the like, or other suitable combustible fluid such as mineral spirits and the like, as a secondary fuel for operatively preventing early ignition and knock arising from the primary fuel. The dual fuel, internal combustion system, which generally utilizes a two-stage process for start-up and operation and can be operated with air- or liquid-cooling, is environmentally clean with hydrocarbon, CO, NOx, and SOx emissions substantially eliminated.

The present invention relates to a method of producing methanol from a methane source by oxidizing methane under conditions sufficient to a mixture of methanol and formaldehyde while minimizing the formation of formic acid and carbon dioxide. The oxidation step is followed by treatment step in which formaldehyde is converted into methanol and formic acid which itself can further be converted into methanol via catalytic hydrogenation of intermediately formed methyl formate.

A triterpenoid compound, methyl 2-cyano-3,12-dioxoleana-1,9(11)-dien-28-oate (CDDO methyl ester), has a non-crystalline, glassy solid form and a non-hydrous crystalline form that can prepared, for example, from a saturated methanol solution. The glassy form displays an enhanced bioavailability over the non-hydrous crystalline form. Each form of CDDO methyl ester is a superior candidate for use, typically in solid dosage form, for treating a variety of disease states, generally associated with inflammation.

Azeotropic or azeotrope-like compositions are disclosed. The azeotropic or azeotrope-like compositions are mixtures of E-1,1,1,4,4,4-hexafluoro-2-butene with methyl formate, n-pentane, 2-methylbutane trans-1,2-dichloroethylene, 1,1,1,3,3-pentafluoropropane, n-butane or isobutane. Also disclosed is a process of preparing a thermoplastic or thermoset foam by using such azeotropic or azeotrope-like compositions as blowing agents. Also disclosed is a process of producing refrigeration by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as solvents. Also disclosed is a process of producing an aerosol product by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as heat transfer media. Also disclosed is a process of extinguishing or suppressing a fire by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as dielectrics.

Various uses of fluorinated olefin having an MRI value of less than ethane, in combination with one or more other components, including other fluoroalkenes, hydrocarbons; hydrofluorocarbons (HFCs), ethers, alcohols, aldehydes, ketones, methyl formate, formic acid, water, trans-1,2-dichloroethylene, carbon dioxide and combinations of any two or more of these, in a variety of applications, including as blowing agents, are disclosed.

The invention concretely relates to a synthetic technology for pyraclostrobin. The synthetic technology comprises: firstly performing cyclization to obtain 1-(4-chlorophenyl)-pyrazol-3-one, oxidizing the pyrazol ring under the effect of an oxidant to generate 1-(4-chlorophenyl)-3-hydroxypyrazole, then using 2-nitrobenzyl bromide to performing etherification to generate 1-(4-chlorophenyl)-3-[2-(nitrophenyl)methoxy]-1H-pyrazole, then using a reducing agent to perform nitro reducing, so as to generate N-hydroxyl-2-[N'-(4-chlorophenyl)pyrazol-3'-yloxymethyl]aniline, then using ClCO2CH3 to perform N-acylation reaction to generate methyl N-hydroxyl-N-2-{[N'-(4-chlorophenyl)pyrazol-3'-yloxymethyl]phenyl}formate, and finally performing hydroxyl methylation under an alkaline condition to generate pyraclostrobin. The technology enables all operations in the pyraclostrobin preparation process to be relatively controllable, helps to improve the stability of the preparation process and improve the product yield, successfully employs low-cost reagents and substantially reduces production cost, and also the employed reagents are relatively small in toxicity, is relatively beneficial for environment protection, and has no corrosivity on plastic pipes, so that the production safety is improved.

The invention relates to a formation method of a lithium ion secondary battery. The method comprises the following steps: performing a first formation on a battery containing a first electrolytic solution; and then injecting a second electrolytic solution into a battery container after the first formation to perform a second formation, wherein the first electrolytic solution contains an electrolyte and a first solvent which is mixture of a solvent A and a solvent B; the solvent A is ethylene carbonate, and the solvent B is one or more selected from dimethyl carbonate, diethyl carbonate, methylethyl carbonate, dimethyl sulfite and diethyl sulfite; and the second electrolytic solution contains electrolyte and a second solvent, and the second solvent is one or more selected from propylene carbonate, butylene carbonate, dimethoxyethane, gamma-butyrolactone, methyl formate, ethyl formate, methyl acetate, ethyl acetate, ethyl propionate, ethyl butyrate and propyl butyrate. The lithium ion secondary battery obtained by the method has excellent cycle performance and low-temperature multiplying factor discharge performance.

Low density expanded and extruded thermoplastic polymer foams are obtained using an environmentally benign non-VOC and non-HAP methyl formate as a blowing agent. The blowing agent can be a blend further including at least one co-blowing agent, preferably an environmentally friendly species (e.g., non-VOC and/or non-HAP). The co-blowing agent is either a physical co-blowing agent (e.g. an inorganic agent, a hydrocarbon, a halogenated hydrocarbon, a hydrocarbon with polar, functional group(s), water or any combination thereof), or a chemical co-blowing agent, or combinations thereof The thermoplastic polymer foam can be an alkenyl aromatic polymer foam, e.g. a polystyrene foam. The blowing agent blend can include any combination of methyl formate and one or more co-blowing agents. The methyl formate-based blowing agent blends produce stable foams for various applications, including containers, packaging systems, as well as insulation boards and building materials. Processes for the preparation of such foams are also provided.

A process for oxidation of methanol, ethanol, or a mixture of methanol and ethanol comprising contacting the methanol and/or ethanol with an oxygen-containing gas and a supported catalyst comprising one or more platinum group oxides. The process conditions and/or catalyst may be selected to as to selectively produce methyl formate from methanol or diethoxyethane from ethanol. The invention also includes certain novel supported platinum group metal oxide catalysts. Preferred catalysts include one or more ruthenium oxides.

Various uses of monochlorotrifluoropropenes, in combination with one or more other components, including other fluoroalkenes, hydrocarbons; hydrofluorocarbons (HFCs), ethers, alcohols, aldehydes, ketones, methyl formate, formic acid, water, trans-1,2-dichloroethylene, carbon dioxide and combinations of any two or more of these, in a variety of applications, including as blowing agents, are disclosed.

Expanded and extruded biodegradable polymer foams are obtained using biodegradable polymers and environmentally benign non-VOC methyl formate as a blowing agent. The blowing agent can be a blend further including at least one co-blowing agent, preferably an environmentally friendly species (e.g., non-VOC), which is either a physical co-blowing agent (e.g. an inorganic agent, a hydrocarbon, a halogenated hydrocarbon, a hydrocarbon with polar, functional group(s), water or any combination thereof), or a chemical co-blowing agent, or combinations thereof. The blowing agent blend can include any combination of methyl formate and one or more co-blowing agents. The polymer foam can include a biodegradable polymer or its blends with other biodegradable polymers or conventional (non-biodegradable) polymers. The methyl formate-based blowing agent blends produce stable foams for various applications, including containers, packaging systems, as well as for insulation and protective cushioning. Processes for the preparation of such foams are also provided.

Azeotropic or azeotrope-like compositions are disclosed. The azeotropic or azeotrope-like compositions are mixtures of E-1,1,1,4,4,5,5,5-Octafluoro-2-pentene with methyl formate, n-pentane, 2-methylbutane, 1,1,1,3,3-pentafluorobutane, trans-1,2-dichloroethylene, 1,1,1,3,3-pentafluoropropane, dimethoxymethane, cyclopentane or Z-1,1,1,4,4,4-hexafluoro-2-butene. Also disclosed is a process of preparing a thermoplastic or thermoset foam by using such azeotropic or azeotrope-like compositions as blowing agents. Also disclosed is a process of producing refrigeration by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as solvents. Also disclosed is a process of producing an aerosol product by using such azeotropic or azeotrope-like compositions as propellants. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as heat transfer media. Also disclosed is a process of extinguishing or suppressing a fire by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as dielectrics. Also disclosed is a process for the separation of a chemical compound from a mixture of two or more chemical compounds using such azeotropic or azeotrope-like compositions.

The invention relates to a gas self-production system used for plug removal and energy increase of an oil-water well and an application method thereof. The gas self-production system comprises, by weight, 3-10% of urea, 5-25% of a nitrite, 5-25% of an activator and 40-85% of water. The nitrite is one of sodium nitrite, ammonium nitrite and potassium nitrite. The activator is one of methyl formate, ammonium amidosulfonate, ammonium-monochloracetat, hexamethylenetetramine and formaldehyde. When the gas self-production system is used, the above materials are mixed at ambient temperature under ambient pressure, and injected into oil-bearing strata having a temperature higher than 50 DEG C, so as to remove plug, increase energy and increase enhance rate. The gas self-production system can be applied for plug removal and energy increasing of low-pressure low-energy wells in an oil field scattered reserve unit.

The invention relates to the field of environmental catalysis and provides a catalyst for elimination of formaldehyde at a room temperature and a preparation method thereof. The catalyst comprises a Beta molecular sieve obtained by an organic template-free seed crystal method and a noble metal active component supported on a Beta molecular sieve. The noble metal active component comprises one or at least two of noble metals such as platinum, ruthenium, gold, silver and palladium. The catalyst has the advantages of simple use condition and convenient operation, can be effectively used for catalytic oxidation of the main pollutant formaldehyde in the room at the room temperature, does not produce by-products such as formic acid, carbon monoxide and methyl formate, has a formaldehyde conversion rate of 100%, a less catalyst use amount and excellent resistance to a high speed, does not need a specific light source, does not consume power and heat, saves energy and has excellent stability and moisture resistance.

Double-layer capacitors capable of operating at extremely low temperatures (e.g., as low as −75° C.) are disclosed. Electrolyte solutions combining a base solvent (e.g., acetonitrile) and a cosolvent are employed to lower the melting point of the base electrolyte. Example cosolvents include methyl formate, ethyl acetate, methyl acetate, propionitrile, butyronitrile, and 1,3-dioxolane. An optimized concentration (e.g., 0.10 M to 0.75 M) of salt, such as tetraethylammonium tetrafluoroborate, is disolved into the electrolyte solution. In some cases (e.g., 1,3-dioxolane cosolvent) additives, such as 2% by volume triethylamine, may be included in the solvent mixture to prevent polymerization of the solution. Conventional device form factors and structural elements (e.g., porous carbon electrodes and a polyethylene separator) may be employed.

An improved process is disclosed for producing acetic acid, including the following steps: reacting a carbonylatable reactant such as methanol, methyl acetate, methyl formate or dimethyl ether with carbon monoxide in a reaction medium containing water, methyl iodide, and a catalyst to produce a reaction product that contains acetic acid; separating the reaction product to provide a volatile phase containing acetic acid, water, and methyl iodide and a less volatile phase; distilling the volatile phase to produce a purified acetic acid product and a first overhead containing water, methyl acetate, and methyl iodide; phase separating the first overhead to provide a first liquid phase containing water and a second liquid phase containing methyl iodide; and adding dimethyl ether to the process in an amount effective to enhance separation of the first overhead to form the first and second liquid phases.

The invention relates to a detection method of determining 16 types of photoinitiators in a paper printing and packaging material, which is used for determining residual amounts of the 16 types of photoinitiators of 2-hodroxy-2-methyl-1-phenylacetone, mehtyl phenylglyoxylate, benzophenone and the like and is characterized by comprising the following concrete steps of: a, sample pretreatment; b, preparation of a standard work solution; c, instrumental analysis; and d, result calculation. Compared with the prior art, through sample pretreatment and optimization of instrumental analysis conditions, the detection method has the advantages that efficiency is high, the 16 kinds of photoinitiators can be simultaneously analyzed and determined within 25m; and printing ink impurities in a sample extraction solution can be better removed in a liquid-liquid distribution impurity removal mode adopted in the sample pretreatment process, so that cost is low, consumption is little, efficiency is high, and sensitivity is high; and in addition, the detection method also has the advantages of high accuracy and good repeatability.

The invention provides a method for refining and purifying propylene oxide. The method is characterized by comprising the steps that an epoxidation reaction product enters a propylene separating column to be separated into column top materials and column bottom materials, wherein the column top materials contain propylene, propylene oxide and methanol and contain or do not contain propane and water, and the column bottom materials contain methanol, water, hydrogen peroxide and high-boiling-point byproducts; column top materials from the propylene separating column enter a propylene stripping column, and the column top gases contain propylene and little propylene oxide and contain or do not contain propane and circulate to a reaction system after compression; and column bottom materials contain methanol, propylene oxide and few aldehyde ketone impurities and contain or do not contain water, enter a reactor filled with alkaline ion exchange resins to react to remove methyl formate and aldehyde out of the column bottom materials and are further refined through rectification to obtain the high-purity propylene oxide product. The invention also provides a separation method for preparing propylene oxide and the product through direct epoxidation. The method provided by the invention has the beneficial effects that the low temperature and low pressure process is adopted, thus increasing the yield of propylene oxide, reducing the losses of propylene oxide and reducing the operating costs of the devices.

Methanol is produced from bacterially oxidized waste methane by reaction with Pd⁺², Cu₊₂ air, and molten phthalic anhydride in an entrained oxidizer generating half ester of methyl phthalate which is reaction distilled to prodtice methanol and recycle phthalic anliydride containing the Pd⁺²,Cu⁺² phthalate catalyst.

The invention discloses a method for synthesizing methyl formate by gas-phase carbonylation of methyl alcohol. A fixed bed reaction technology is used, and raw materials including methyl alcohol, carbon monoxide, hydrogen and oxygen generate gas-phase carbonylation reaction under the action of supported nano platinum family metal heterogeneous catalyst so as to generate methyl formate. The reaction raw materials include 10%-50% of methyl alcohol, 10%-50% of carbon monoxide, 10%-30% of hydrogen and 5%-20% of oxygen by volume ratio, and react under the conditions that air speed is 500-5000h<-1>, reaction temperature is 323K-423K and reaction pressure is 0.01Mpa-2Mpa.

The invention discloses a method for preparing catalyst for methanol dehydrogenation to methyl formate through a step coprecipitation-spray drying process. The method is that step coprecipitation is performed to copper, zinc and aluminum salt solution and alkaline solution, after the copper, zinc and aluminum salt solution and alkaline solution are pulped and filtered with hot desalted water, a qualified filter cake is obtained and is subjected to colloid mill processing, spray drying is performed to size, and dried catalyst precursor is roasted and formed so as to obtain the catalyst for methanol dehydrogenation. The catalyst prepared by the method has the characteristics of high catalytic activity and selectivity and strong stability.

A process for vapor-phase methanol carbonylation to methyl formate, a supported nano-scaled platinum group metal heterogeneous catalyst used in said process and a method for preparing said catalyst are disclosed. A feed gas containing methanol, carbon monoxide, hydrogen and oxygen is passed through a reactor loaded with supported nano-scaled platinum group metal heterogeneous catalyst to produce methyl formate by vapor-phase carbonylation reaction, in the reaction conditions with a space velocity of 500-5000 h⁻¹, a temperature of 50-150° C. and a pressure of 0.01-2 MPa. The active component of the supported nano-scaled platinum group metal heterogeneous catalyst is platinum group metal with a particle size of 0.5-10 nm. The process and catalyst solve the problems in present industrial technology, such as high requirement for the purity of raw materials, severe corrosion of the equipment by catalyst, difficult separation of catalyst from product, high reaction pressure, difficult operation and the like, and provide a novel technical way to produce methyl formate.

The invention discloses a nano indium sulfide photocatalyst with the chemical formula of In2S3. The nano indium sulfide photocatalyst is of a 3D spherical structure, and the surface of a sphere consists of nano thin sheets. The morphology features enable the catalyst to have a large specific surface area and pore volume and to generate more active sites; the nano indium sulfide photocatalyst is prepared by adopting a hydrothermal method and is applied to preparing methyl formate. The nano indium sulfide photocatalyst provided by the invention has the advantages that the preparation method of the photocatalyst is simple and is convenient to operate; the obtained photocatalyst is used for reducing carbon dioxide to prepare methyl formate, has favorable photocatalytic activity, can reduce CO2 effectively, and has the catalysis efficiency of 1500micron mol/h/g.cat by taking methyl alcohol as a solvent.