312results about "Hydroxy compound preparation" patented technology

The present application relates to the technical field of plasma catalysis, and particularly relates to a method for catalytically converting methane and water into methanol and hydrogen under plasma conditions, a device used and a catalyst used. The bubbling-fluidized plasma reactor of the present application is formed by connecting a bubbling corona discharge plasma reactor at the lower part and a fluidized bed dielectric barrier discharge reactor at the upper part in series, and is filled with a catalyst in a discharge channel. Methane mixed with argon is preheated and then enters a gas bubbling column from a raw material inlet. A corona discharge is formed in the gas bubbles by a bubbling tip to generate plasma, so that the methane-water is preliminarily converted in cooperation. The gas after the preliminary conversion is introduced into the discharge channel to react under the action of the catalyst, and hydrogen and methanol are obtained by conversion.

The application relates to a preparation and application of a molybdenum and indium co-modified cobalt-based catalyst for carbon dioxide hydrogenation synthesis of low-carbon alcohol, belonging to the field of catalysis. Co is used as an active component, In and Mo components are introduced, an alkali metal K additive is introduced, an In and Mo co-modified Co-based oxide precursor is created by adopting a sol-gel method, the precursor is reduced by hydrogen, and is further activated by CO2+H2, so that the In and Mo co-modified Co2C catalyst is obtained; the catalyst is used in a reaction of carbon dioxide hydrogenation for preparing low-carbon alcohol, under the condition that the reaction temperature is 340 DEG C and the reaction pressure is 3 MPa, the carbon dioxide conversion rate is more than 35%, and the low-carbon alcohol selectivity is close to 20%.

This invention belongs to the field of carbon dioxide capture, utilization, and storage technology, and relates to a novel high-performance atomically dispersed hydrogenation catalytic material for large-scale synthesis, its preparation method, and its continuous application. This invention achieves atomic dispersion of the active metal centers on the support by further adjusting the noble metal loading, modifying the support surface using organic acids and bases, and employing a mixing method combining high-power mechanical stirring and ultrasonic treatment. The catalytic material remains stable during kilogram-scale production and maintains a high methanol yield even after 28 hours in a continuous coupled hydrogenation to methanol experiment. The hydrogenation catalytic material prepared by this invention exhibits excellent cycle stability and catalytic activity, making it highly valuable for large-scale industrial applications.

The present invention provides a system and a process for the production of methane, C2-C100 linear alkanes, C2-C10 olefins, oxygenates, methanol and combinations thereof, comprising: an oxyfuel combustor comprising a combustion gas outlet, and a first fluid entrance; a heat recovery system; a carbon capturing unit comprising an adsorption column which comprises a combustion gas inlet in fluid communication with the combustion gas outlet of the oxyfuel combustor, and a feed gas inlet; a desorption column; one or more methanol synthesis reactors; wherein the adsorption column comprises a base portion and a top portion; the adsorption column extends a height from the base portion to the top portion; the base portion corresponds to one half of the height of the adsorption column; the feed gas inlet and the combustion gas inlet are located in the base portion; and the feed gas inlet is located above the combustion gas inlet in the base portion.

The present disclosure relates to a system (100) for converting biomass to methanol and methods of performing the same. The system (100) comprises a gasification reactor (102), air-separation unit (112), electrolysis unit (114), water-gas shift reactor (124) and methanol synthesis reactor (116). Preferably, the system (100) comprises a bypass conduit (136) for diverting a portion of syngas produced by the gasification reactor (102) so that it does not pass through the water-gas shift reactor (124).

The application discloses a biomass fermentation process for preparing green methanol, which comprises the following steps: providing a biomass raw material, and fermenting to obtain biogas; obtaining rich-methane gas after crude purification of the biogas; obtaining qualified rich-methane gas after super-precision detoxification of the rich-methane gas; adding medium-pressure steam into the qualified rich-methane gas, and performing a methane steam reforming reaction to obtain a mixed gas; performing PSA treatment on the mixed gas to obtain a resolved gas and a raw material gas; and feeding the resolved gas into a normal-temperature catalytic heat exchange system, and taking the raw material gas as one of raw materials for methanol synthesis to prepare refined methanol. The application realizes full-chain coupling and efficient utilization, combines biomass fermentation, biogas purification and methane steam reforming, and adopts a CO2 circulation technology. The application realizes full-process energy integration: the waste heat in the fermentation process, the waste heat of the PSA resolved gas and the waste water of rectification are utilized to drive the methane steam reforming reaction, the system energy consumption is reduced, and the economic efficiency and sustainability of the system are further improved.

This invention discloses a method for preparing 1,3-propanediol by hydrogenation of methyl 3-hydroxypropionate. Using manganese-doped layered copper silicate prepared by deposition precipitation as a precursor, a highly dispersed and stable copper-based catalyst is obtained through reduction. The manganese doping and layered copper silicate species enhance the interaction between copper and the support, improving the dispersion of active copper species. Simultaneously, the layered copper silicate increases the difficulty of copper species reduction, thereby improving the Cu content of the catalyst. + / Cu 0 The strong metal-support interaction and the dispersing effect of manganese can effectively inhibit the migration and aggregation of active copper species during the reaction, thus improving the stability of the catalyst. The copper-based catalyst prepared in this invention exhibits high conversion and 1,3-propanediol selectivity in the hydrogenation reaction of methyl 3-hydroxypropionate, with high catalytic activity and stability, and few byproducts, showing good prospects for industrial application.

The present invention relates to a process for preparing an acrylate, preferably an R-CH2-CH2-(CHR-CH2)x-acrylate, more preferably N-butyl acrylate, and in particular to an alcohol conversion process of ethanol employing a homogeneous catalyst and a base, wherein 1-butanol as a product of said alcohol conversion process is formed, and wherein said 1-butanol is converted into N-butyl acrylate by an esterification process.

This invention discloses an amorphous aluminum-nickel catalyst synergistically modified with rare earth and chiral ligands and its application in asymmetric hydrogenation, belonging to the field of catalyst technology. The catalyst comprises nickel, aluminum, boron, rare earth elements, and chiral ligands, and possesses an amorphous structure. The chiral ligands coordinate with nickel atoms on the catalyst surface through their coordinating atoms, with the rare earth elements located within the coordination range of the ligands, forming a nickel-ligand-rare earth bridging structure that synergistically regulates the stereoelectronic environment of the catalytic center. The catalyst preparation method includes steps such as chemical reduction and double quenching to prepare an amorphous alloy precursor, gradient alkaline leaching activation to form a porous structure, chiral ligand modification, and passivation protection. The catalyst of this invention can be used in the asymmetric hydrogenation reaction of unsaturated compounds such as unsaturated ketones, aromatic ketones, and imines, achieving high conversion rates and high enantioselectivity, and can be recycled multiple times without significant performance degradation, showing promising industrial application prospects.

The application discloses a green electricity consumption system and method for synthesizing methanol by CO2 hydrogenation through plasma catalysis. H2 obtained by electrolysis of water and CO2 captured in an industrial process are first subjected to a reverse water gas shift reaction under efficient driving of normal pressure jet plasma to obtain a CO / CO2 / H2 mixed product, the mixed product is subjected to multi-stage pressurization after passing through a buffer storage tank, and green methanol is further synthesized in a hot catalytic bed. The application adopts a two-stage methanol synthesis system of plasma CO2 pre-conversion and CO / CO2 catalytic hydrogenation, solves the problems of catalyst deactivation and excessively high reaction temperature in a traditional hot catalytic reverse water gas shift reaction, and overcomes a thermodynamic bottleneck of a CO2 direct catalytic hydrogenation reaction. The plasma reaction device has high energy efficiency and is quick to start and stop, can be directly driven by fluctuating power, and the system maintains the stability of the catalytic system through intermediate product storage and multi-stage pressurization.

An object of the present disclosure is to provide a method for producing an organic compound, and a composition. The object is achieved by a method for producing a compound represented by formula (1):wherein X represents —O—, an optionally substituted imino group, or —S—, R1 represents a hydrogen atom or a hydrocarbyl group optionally having at least one substituent, and R2 represents a hydrogen atom or a monovalent organic group, or R1 and R2, together with X and one carbon atom respectively adjacent to R1 and R2, may form a heterocyclic ring optionally having at least one substituent, R3 represents a hydrogen atom or a monovalent organic group, and R4 represents —CF2CH3 or —CH2CHF2; the method including step A of reacting a compound represented by formula (2):wherein the alphabetical symbols are as defined above, with vinylidene fluoride under light irradiation.

Conventional thermal decomposition and carbonization technologies for plastics have resulted in inefficient and uniform carbonization of plastics, leading to low carbonization rates of the carbides and low yields of reformed gas during gasification of the carbides. Consequently, ethanol could not be efficiently and stably obtained in ethanol production processes using the reformed gas. [Solution] The present invention provides an ethanol production method and apparatus comprising: a carbonization step of co-carbonizing plastic and biomass to produce a carbide; a reforming gasification step of generating a reformed gas containing hydrogen, carbon monoxide, methane, and carbon dioxide through a mixed gasification reaction of the carbide with water vapor and carbon dioxide; and an ethanol production step of supplying the reformed gas to an ethanol production step and producing ethanol by contacting it with a C2 oxygenation catalyst and a hydrogenation catalyst in the ethanol production step; separating and recovering a metal-containing residue generated together with the reformed gas in the reforming gasification step, and mixing the recovered metal-containing residue with the plastic and biomass.

An enhanced catalyst for carbon dioxide hydrogenation to methanol includes a copper-zinc oxide catalyst supported on an alumina support and at least one promoter selected from manganese, niobium and zirconium. The catalyst is activated prior to being utilised in the process for carbon dioxide hydrogenation to methanol. A process for producing methanol by reacting carbon dioxide with hydrogen over the enhanced catalyst is also included.

The application discloses a cold-heat-electricity-alcohol poly-generation system integrating solar biomass gasification and CO2 capture and resource utilization, which comprises a solar biomass gasification unit, a CO preferential oxidation and purification unit, a CO2 hydrogenation methanol synthesis unit, a fuel cell power generation unit and a waste heat utilization unit; a synthesis gas outlet of the solar biomass gasification unit is connected with an inlet of the CO preferential oxidation and purification unit; a hydrogen-rich gas outlet of the CO preferential oxidation and purification unit is connected with an anode inlet of the fuel cell power generation unit; a CO2 enrichment flow outlet of the CO preferential oxidation and purification unit is connected with a CO2 inlet of the CO2 hydrogenation methanol synthesis unit; and a heat output interface of the fuel cell power generation unit is connected with a heat source inlet of the waste heat utilization unit. The application can realize the collaborative consumption of solar energy and biomass energy, the resource utilization of CO2 capture and the energy cascade recovery, and can simultaneously produce electric energy, cold energy, heat energy and methanol products, and has high comprehensive efficiency and low carbon emission.

The application provides a method for carbon dioxide capture and hydrogenation synthesis of methanol based on a eutectic solvent, and belongs to the technical field of carbon capture and utilization. The method comprises the following steps: weighing acetyl guanidine and ethylene glycol according to a proportion, mixing the acetyl guanidine and the ethylene glycol, stirring to prepare a eutectic solvent at a given temperature, capturing carbon dioxide in flue gas by using the eutectic solvent to form a rich liquid, transferring the rich liquid into a high-pressure reaction kettle, adding a catalyst, filling in hydrogen, increasing the temperature to perform a carbon dioxide hydrogenation reaction, filtering to obtain a catalyst and a mixture of the eutectic solvent and methanol after the reaction, and performing flash evaporation on the mixture to obtain product methanol and regenerated eutectic solvent. After capturing carbon dioxide in the flue gas, the method directly performs in-situ carbon dioxide hydrogenation in the absorbent to prepare methanol, avoids problems such as high energy consumption of carbon dioxide desorption, high reaction temperature and low single-pass conversion rate in a traditional gas-solid phase reaction process, and has a simple process and easy regeneration of the eutectic solvent.

The application belongs to the field of catalysts, and discloses a preparation method of a Cu / ZnO / SiO2 catalyst with high Ov content and application of the catalyst in CO2 hydrogenation to methanol. The steps are as follows: oxide precursors and a precipitating agent are dissolved in a mixed solution of water and ethanol, and are precipitated and aged by a coprecipitation method; the obtained material is centrifuged and washed multiple times to obtain a catalyst precursor; the catalyst precursor is dried and calcined to obtain a solid powder; the solid powder is reduced by H2; and the Cu / ZnO / SiO2 catalyst is obtained by treatment in a mixed gas of CO2, H2 and Ar. The application lies in that the catalyst preparation process is simple, SiO2 and ZnO interact with each other to produce more Ov, the performance of CO2 hydrogenation to methanol is finally improved, good stability and activity are exhibited, and the application prospect is good.

A method of more stably synthesizing methanol from a gas containing carbon dioxide and sulfur compounds, such as blast furnace gas. The method includes: a water addition process of adding water to a feed gas G01; a hydrolysis process of hydrolyzing carbonyl sulfide contained in obtained hydrated feed gas into hydrogen sulfide and carbon dioxide; a water-gas shift reaction process of converting carbon monoxide and water contained in obtained hydrolyzed gas into carbon dioxide and hydrogen; a carbon dioxide gas separation process of separating obtained shift reaction gas into carbon dioxide gas and gases of components other than carbon dioxide; a desulfurization process of removing at least hydrogen sulfide from hydrogen sulfide and carbonyl sulfide contained in the carbon dioxide gas to obtain a high-concentration carbon dioxide gas; a hydrogenation process of adding hydrogen gas to the high-concentration carbon dioxide gas; and a methanol synthesis process of reacting carbon dioxide and hydrogen contained in obtained methanol feed gas.

This invention discloses an energy-saving five-tower methanol distillation method based on multi-effect thermal coupling. Crude methanol is fed to a pre-tower for distillation; the bottom product of the pre-tower is fed to an atmospheric distillation tower, the bottom product of the atmospheric distillation tower is fed to a negative pressure distillation tower, and the bottom product of the negative pressure distillation tower is fed to a pressurized distillation tower; the bottom product of the pressurized distillation tower is fed to a secondary pressure distillation tower; refined methanol is collected from the tops of the pressurized distillation tower, the atmospheric distillation tower, the negative pressure distillation tower, and the secondary pressure distillation tower; the top product of the pressurized distillation tower heats the reboiler of the secondary pressure distillation tower, and the top product of the secondary pressure distillation tower heats both the reboilers of the pre-tower and the atmospheric distillation tower; the top products of the pre-tower and the atmospheric distillation tower heat the reboiler of the negative pressure distillation tower. This process improves the heat recovery efficiency within the system, significantly reduces the condensation load of the top vapor, lowers the overall energy consumption of the distillation process, and achieves efficient multi-stage heat recovery and utilization within the system, reducing the ethanol content in the refined methanol product and improving methanol recovery efficiency.

This application discloses a method for preparing and applying a tin selenide-supported ferruginous zeolite catalyst, belonging to the field of catalytic chemistry. The preparation method includes: pre-crystallizing a mixed solution containing a silicon source, an aluminum source, a template agent, and water to obtain a silica-alumina gel; under stirring conditions, slowly adding a mixed solution containing a tin source, a selenium source, and ethanol sequentially, and then slowly adding an alkali to the silica-alumina gel to obtain a mixed gel; placing the mixed gel in a sealed container for hydrothermal crystallization; washing and drying the hydrothermally crystallized product, followed by calcination, to obtain the tin selenide-supported ferruginous zeolite catalyst. This application, by modifying silica-alumina molecular sieves with tin selenide, enables one-step ethanol production using hydrogen and carbon dioxide as raw materials in a fixed-bed reactor. Furthermore, the selectivity of ethanol can be adjusted by modifying the catalyst preparation process.

The application provides a method and device for producing ethanol in two steps, which comprises the following steps: step S1: carrying out a reaction of decomposing water to produce hydrogen under the action of a metal oxide catalyst at a normal pressure and at a reaction temperature of 500 DEG C to 1300 DEG C; and step S2: carrying out a reaction of the hydrogen prepared in step S1 with carbon dioxide to produce ethanol under the action of a composite metal oxide catalyst at a reaction pressure of 1 to 10 standard atmospheres. The application can meet the need of producing a large amount of ethanol, save electric energy, improve the utilization rate of heat energy and has great environmental value.

An apparatus and process for capturing carbon dioxide from exhaust output from at least one ship engine on the ship for storage of the carbon dioxide on the ship. The storage of the carbon dioxide on the ship can facilitate delivery of the captured carbon dioxide to a fuel production system at a port of destination or other port that the ship may arrive at to provide the captured carbon dioxide to the fuel production system. The fuel production system may then use the carbon dioxide to form a fuel (e.g. methane, methanol, etc.). The fuel that is produced can be provided to other ships at the port. The carbon capture system can utilize membranes, adsorption, and / or absorption for capturing the carbon dioxide. The carbon dioxide can be stored on the ship in at least one storage vessel of the ship.

The application discloses an Fe2N / Cu reverse loading type catalyst, a preparation method and application thereof, and belongs to the technical field of synthesis gas conversion and heterogeneous catalysis. The technical scheme comprises the following steps: dissolving iron salt and copper nitrate, and then preparing a catalyst precursor 1 by using a coprecipitation method; calcining the catalyst precursor 1 to obtain a catalyst precursor 2; reducing the catalyst precursor 2 by using hydrogen, and then performing nitriding by using pure ammonia gas, wherein the nitriding temperature is 340-360 DEG C, so as to obtain the Fe2N / Cu reverse loading type catalyst. The application is applied to the preparation of alcohol by carbon monoxide hydrogenation, solves the problem that the selectivity of higher alcohol is not high when existing nitriding iron is used for preparing higher alcohol by a Fischer-Tropsch synthesis reaction, and has the characteristics of high alcohol selectivity, high C 2+ OH selectivity and stability when being applied to the Fischer-Tropsch synthesis reaction.

The present application relates to a kind of for CO2 hydrogenation methanol hydrophobic core-shell catalyst and its preparation method and application, belong to catalyst preparation technical field.Zirconium-based metal organic framework UiO-66 is core body, outer layer constructs hydrophobic mesoporous silica shell layer to form core-shell structure carrier.The carrier is pre-wetted with solvent before metal introduction, and copper, zinc nitrate precursor is introduced under the condition, and its wetting, penetration and migration process in channel are controlled, so that it can penetrate hydrophobic mesoporous shell layer and transport to core-shell interface and UiO-66 core surface.Subsequently, by adjusting metal deposition kinetics, copper zinc species is selectively deposited and forms active component enrichment at interface.Preferably, by controlling metal loading process, copper zinc active component is enriched and controllably distributed in hydrophobic core-shell structure, so as to improve the stability and catalytic performance of catalyst in CO2 hydrogenation methanol reaction.

Process for the production of a product 2-alkylalkanol stream A process for the production of a product 2-alkylalkanol stream is disclosed. The process comprises feeding a polished 2-alkylalkanol stream to a lights removal distillation column. A lights stream is withdrawn from at or near the top of the lights removal distillation column and a heavies containing stream is withdrawn from a first position at or near the bottom of the lights removal distillation column. The product 2-alkylalkanol stream is withdrawn as a liquid side draw from a second position above the first position.

The present application relates to a kind of system, method and coal-to-methanol for reducing carbon emission of coal-to-methanol, belong to coal chemical technology field;System is composed of pretreatment unit, coal gasification unit, chemical chain reforming unit, methanol synthesis unit and CO2 hydrogenation unit;Method includes coal gasification, chemical chain reforming, methanol synthesis, CO2 hydrogenation;Crude synthesis gas is directly into chemical chain system without shift and decarburization, utilize fuel reactor to convert carbon hydrogen component into high-purity CO2, while utilizing steam reactor in situ hydrogen production;CO2 originally needing to be discharged is all used for methanol synthesis with crude synthesis gas, eliminate independent water gas shift and low-temperature methanol washing unit from system architecture, significantly shorten process flow, carbon element utilization rate can be promoted to more than 95%, substantially reduce CO2 emission from source.

A system and a process for producing blue methanol are provided, where blue methanol is understood as methanol produced under conditions limiting the emission of CO2. The system comprises a shift section, a CO2 removal section and in a preferred embodiment also a hydrogen recovery section, arranged downstream a methanol synthesis section.

The present invention provides a catalyst for the production of methanol by CO2 hydrogenation and a process for its preparation, said catalyst having the formula: Sn x (ZnO) y Zr z wherein x is 0.05-0.10, y is 0.05-0.10, z is 0.80-0.90, and x+y+z = 1, and wherein said ZnO has a morphology selected from the group consisting of flower-like, spherical and plate-like. The present invention also relates to the use of said catalyst for the production of methanol by CO2 hydrogenation.

The invention relates to a process for preparing methanol, in which a first reactant stream having a first reactant in the form of hydrogen and a second reactant stream having a second reactant in the form of a carbon oxide-containing gas mixture are provided; the first reactant and the second reactant are fed into a synthesis reactor arrangement; and the methanol synthesis is conducted in the synthesis reactor arrangement to form a product stream having methanol. Forecasts are created as to rates of change in inflow rate of the first and / or second reactant in order to compensate for fluctuations.

The application relates to a method for preparing ethanol by halogen-mediated oxidation of ethane, wherein ethane is mixed with Cl2 generated by electrolysis of NaCl solution, under light conditions, the Cl-Cl bond in the Cl2 molecule is cracked to form active chlorine, the photo-catalytic reaction of ethane is promoted to generate CH3CH2Cl product, and ethanol is obtained after hydrolysis of the CH3CH2Cl product. 2 Compared with the prior art, the application can reach 78% of Faraday efficiency under the highest 1000 mA / cm 8 The ethanol yield reaches 1.56*10 cat / mu mol / g cat / h, which is the most advanced and efficient system for preparing ethanol by selective oxidation of ethane.