55 results about "Hydroformylation" patented technology

Ru catalyzed cascade hydroformylation / hydrogenation / esterification using imidazole ligands.

This invention discloses a ruthenium catalyst supported on a phosphine-containing porous organic polymer and its preparation method. The phosphine-containing porous organic polymer serves as both a support and a solid ligand. The phosphine-containing porous organic polymer ligand is a random copolymer, and its structure can be represented by general formula I. The ruthenium catalyst supported on the phosphine-containing porous organic polymer according to this invention has a large specific surface area and contains a hierarchical porous structure, enabling efficient direct preparation of alcohols from olefins via reductive hydroformylation, and is easily recyclable. It exhibits excellent activity and regioselectivity in the direct preparation of alcohols from olefins via reductive hydroformylation, with an alcohol selectivity of nearly 90% and a high ratio of straight-chain alcohols to branched-chain alcohols.

This invention belongs to the field of homogeneous catalysis technology, and particularly relates to a method for the hydroformylation of propylene to prepare isobutyraldehyde. The method includes: in the presence of a bidentate P-N ligand and a rhodium metal compound, introducing propylene and syngas to carry out a hydroformylation reaction to prepare isobutyraldehyde. The structural formula of the bidentate P-N ligand is as follows: [Insert structural formula here]. Wherein, R1 is selected from one of C2-C4 alkyl groups, substituted or unsubstituted phenyl groups; R2 is selected from one of hydrogen, C1-C4 alkyl groups, alkoxy groups, substituted or unsubstituted phenyl groups. This method provides a highly active P-N ligand, which, while reducing the amount of rhodium catalyst, maintains high activity and can significantly improve the conversion rate of propylene, as well as the selectivity and yield of isobutyraldehyde.

The present application provides a catalyst for preparing oxygen-containing compounds by olefin hydroformylation reaction, and a preparation method and use thereof, the catalyst is Fe x Co y M, the catalyst contains 0.1-15wt% M, 85-99.9wt% Fe and Co, the atomic ratio of x to y is 0.1-10, and M is a metal element. When the catalyst is used for preparing oxygen-containing compounds by olefin hydroformylation reaction, the conversion rate of olefin can reach 93-99.9%, and the selectivity of oxygen-containing compounds can reach 89-98.8%; and the catalyst is in a solid state during the reaction, which is easy to realize solid-liquid separation with the product, and also avoids the loss of the catalyst during the separation process.

This invention provides a method for determining the deactivation temperature and deactivation characteristics of a hydroformylation catalyst, comprising: S1. preparing a hydroformylation reaction solution; S2. measuring the reaction solution and placing it in an adiabatic testing instrument to simulate a hydroformylation reaction, stopping the heating when the temperature reaches T0 and incubating the reaction under adiabatic conditions; recording the temperature change and obtaining the highest temperature T. m S3. After cooling the test ball, remove half of the reactant material, add the hydroformylation reaction raw material, and heat up to simulate the hydroformylation reaction. When the temperature reaches T1, stop heating and perform an adiabatic reaction. Record the highest temperature T. mf S4. Compare T1 and T m and T mf If T mf =T1, catalyst deactivation temperature is T m Irreversible inactivation; if T mf =T m The catalyst deactivation temperature is T m Reversible inactivation; if T mf >T m Remove the material from the test sphere and repeat steps S2 to S4. The judgment method of this invention has a short testing cycle, high safety, and eliminates the need for sample separation and component analysis. It provides guidance for research on catalyst operating limits and the selection of homogeneous catalyst recovery temperatures.

A method for producing a higher alcohol from a waste plastic feedstock is disclosed, comprising: (a) providing a hydrocarbon feed stream comprising a pyrolysis oil feed obtained from pyrolysis of plastic waste, wherein the pyrolysis oil comprises at least 20 wt % higher olefins with a carbon number in the range C5-C20, based on its total hydrocarbon content; (b) contacting the hydrocarbon feed stream with synthesis gas under hydroformylation conditions in the presence of a hydroformylation catalyst and recovering a hydroformylation product; (c) subjecting the hydroformylation product to hydrogenation and / or a distillation to recover a higher alcohol product.

The application discloses a rhodium-catalyzed desymmetrization hydroformylation method for constructing polychiral center carbon ring nucleosides. The method for constructing polychiral center carbon ring nucleosides comprises the following steps: under the condition of an inert atmosphere, an acetylacetone dicarbonyl rhodium metal precursor and a chiral ligand are added into an organic solvent to prepare a catalyst solution, the catalyst solution is mixed with a substrate, and a reaction is carried out under the condition of a hydrogen atmosphere and a carbon monoxide atmosphere; after the reaction is completed, filtration and purification are carried out, and polychiral center cycloalkyl aldehyde is obtained; and the aldehyde group is converted to obtain the polychiral center carbon ring nucleosides. The method for constructing polychiral center carbon ring nucleosides has the advantages of high selectivity, wide substrate compatibility, high reaction efficiency, easy conversion of products, and the like. The whole reaction process can obtain polychiral center cycloalkyl aldehyde in one step with extremely high enantioselectivity and diastereoselectivity, the aldehyde group is converted, polychiral center carbon rings can be obtained with high yield, high dr value and high ee value, and the method is simple and easy to operate.

The present application relates to a kind of high selectivity synthesis method of secondary aldehyde.The synthesis method includes the following steps: adding catalyst, ligand, solvent into reaction device, and importing olefin and synthesis gas, so that the reaction system is under heating to carry out first stage reaction;After first stage reaction is carried out for 10-300 minutes, continue to import synthesis gas into reaction device, so that the pressure of reaction system is increased, and second stage reaction is carried out, to obtain secondary aldehyde;The pressure of reaction system during first stage reaction is 0.1-0.5 MPa;Olefin is terminal olefin or mixture containing terminal olefin.The present application first carries out low-pressure isomerization, then high-pressure hydroformylation, cooperates with specific kind of big steric hindrance monodentate phosphite ligand, controls the molar ratio of ligand and catalyst, and the three produce synergies, so that terminal olefin or terminal olefin in mixture material is first isomerized in situ, then together with original internal olefin is converted into target secondary aldehyde product with high selectivity.

This invention belongs to the field of heterogeneous Rh-based catalyst technology, and discloses a method for preparing a heterogeneous rh-based catalyst and its application. This invention prepares a heterogeneous rh-based catalyst using a one-pot method. By employing a reduction-reoxidation process, the content of different valence states of rhino in the rhino species on the surface of the heterogeneous rh-based catalyst is simply and precisely controlled, increasing the content of the most favorable δ+ valence state from 7.31% to 44.78%, thereby giving the catalyst higher hydroformylation activity. Under reaction conditions of 120℃ and a mixed gas pressure of 2 MPa, the styrene conversion rate reaches 73.9% and the aldehyde selectivity reaches 95.9% within 4 hours, which is superior to most heterogeneous rhino-based catalysts and close to that of homogeneous rhino catalysts. The heterogeneous rhino-based catalyst is prepared by the sol-gel method, which is simple in preparation and control. The prepared catalyst has a uniform rhino distribution, stable performance, and is beneficial for industrial applications.

The application provides a preparation method of 3-aryl / alkyl-beta-naphthyl ether compounds, and the preparation method comprises the following steps: reacting trimethyl orthoformate with 1,3-diaromatic propyl ketone compounds or 1-aryl-3-alkyl ketone compounds to obtain 3-aryl-beta-naphthyl ether compounds or 3-alkyl-beta-naphthyl ether compounds. The reaction condition of the application is mild, trimethyl orthoformate is cheap and easy to obtain, can be used as a methylation reagent and a carbon source for extending a carbon chain at the same time, the range of reaction substrates is wide, and the functional group tolerance is good; the reaction is efficient, the selectivity is high, the post-treatment is simple, the operation is simple, and the application is suitable for large-scale industrial production; the complex substrate prepared in advance in the traditional reaction is avoided, the metal catalyst necessary for the traditional reaction is not needed, the binaftyl alcohol precursor compounds can be prepared with high chemical selectivity, and a more simple and efficient route is provided for the olefin hydroformylation / hydroformyl esterification reaction for synthesizing bidentate ligands.

The application provides a method for synthesizing branched aldehyde with high selectivity through a hydroformylation reaction. Through a simple two-step treatment method, only by changing one or more of the gas phase composition, temperature and pressure, the terminal olefin is isomerized into an internal olefin, and then the branched aldehyde product is synthesized with high selectivity through hydroformylation. The method uses a heterogeneous catalyst without phosphine ligand, is environment-friendly, and has the advantages of simple operation steps, cheap and easily available raw materials, and easy separation of the catalyst and the product.

To provide a good method for hydroformylation. [Solution] The present invention relates to a hydroformylation reaction method. In one embodiment, the hydroformylation reaction method includes (a) contacting an olefin with hydrogen and carbon monoxide in the presence of a homogeneous catalyst in a reactor to provide a reaction fluid, the reactor comprising one or more reaction zones; (b) removing a portion of the reaction fluid from a first reaction zone; (c) passing at least a portion of the removed reaction fluid through a shear mixer to generate bubbles in the portion of the removed reaction fluid, the hydrogen and carbon monoxide supplied to the reactor being introduced through the shear mixer; and (d) returning the removed reaction fluid to the first reaction zone through one or more nozzles, the returned reaction fluid coming out of each nozzle being a jet, the mixing energy density supplied to the reactor by the jet being 500 watts / m³ 3 That's all.

The present invention relates to a method for the continuous hydroformylation of olefins with synthesis gas in the presence of a cobalt catalyst, wherein the method is automated by the use of APC control with at least three controlled variables A, B and C.

Ru-catalyzed cascade hydroformylation / hydrogenation / esterification using phosphine ligands.

This invention relates to the technical field of molecular sieve catalysts, specifically to a composite catalyst, its preparation method, and its application. The composite catalyst contains a silicon-containing molecular sieve, an active metal Rh, and carbon materials; wherein the active metal Rh and a portion of the carbon materials are simultaneously distributed within the pores of the silicon-containing molecular sieve, with the remaining carbon materials distributed on the outer surface of the silicon-containing molecular sieve; in the composite catalyst, the weight ratio of SiO2:elemental Rh:carbon materials (based on elemental C) in the silicon-containing molecular sieve is 100:(0.01-5):(0.1-12). This catalyst, used in the hydroformylation reaction of olefins, results in high conversion rates of substrate olefins, high selectivity for aldehyde products, and a high ratio of normal to isomers of aldehyde products. Furthermore, the active metal in the catalyst exhibits strong stability during the reaction, is not easily lost, has a long catalyst lifetime, and facilitates the separation of the catalyst from the product.

The application relates to the field of olefin catalysis, and discloses a supported cobalt-based alloy catalyst, a preparation method and application thereof, and a method for diisobutylene hydroformylation, the catalyst comprising a carrier, an active component and an additive, the carrier being SiO2, metal elements in the active component being Co, and metal elements in the additive being Ni; at least part of the metal elements in the active component form nano-alloy particles together with at least part of the metal elements in the additive, and the nano-alloy particles are loaded on the surface of the carrier. The supported cobalt-based alloy catalyst provided by the application has the advantages of simple preparation process, high catalytic activity, easy separation and recovery from a liquid phase, and potential application and industrial production.

Hydroformylation process by reaction between at least one alkene and a gaseous mixture comprising at least carbon monoxide and dihydrogen in the presence of porous catalytic capsules dispersed in at least one organic liquid phase L1. Said porous catalytic capsules, formed from a Pickering emulsion, consist of a liquid core comprising at least one liquid phase L2 comprising at least said hydroformylation catalyst and a porous crust formed by solid particles crosslinked by a crosslinking agent.

The application discloses a method for preparing normal aldehyde by catalyzing olefins by using an oxide-molecular sieve composite catalyst. The method comprises the following steps: adding the olefins, the oxide-molecular sieve composite catalyst and a solvent into a reaction kettle, introducing synthesis gas after being closed, and obtaining a reaction product under the conditions of 80-100 DEG C, a pressure of 1-5 Mpa, a rotating speed of 800-1000 rpm and a reaction time of 0.5-3 h. The oxide-molecular sieve composite catalyst is a molecular sieve and a metal oxide which are encapsulated with an active component. The catalyst obtained by the method has high activity and stability, and the selectivity of the catalyst for linear aldehyde is remarkably improved, so that the catalyst has a good industrial application prospect.

This invention discloses a silicon-containing monophosphine ligand, its preparation method, catalytic composition, and applications, belonging to the field of organic synthesis and catalysis technology. Addressing the problems of existing cobalt-based olefin hydroformylation systems, such as difficulty in effectively controlling the ratio of n-alcohol to iso-alcohol in the products, limited freedom in ligand structure design, and insufficient system stability and scale-up applicability, the silicon-containing monophosphine ligand of this invention can be prepared by coupling a Grignard reagent with a phosphine chloride. Furthermore, the cobalt-phosphine catalytic system composed of the silicon-containing monophosphine ligand and a cobalt precursor can achieve the direct conversion of various olefins to their corresponding alcohols under a CO / H2 atmosphere. By adjusting the structural parameters of the ligand, the ratio of n-alcohol to iso-alcohol in the products can be effectively controlled. This catalytic system exhibits good thermal stability and applicability during the reaction process, making it suitable for the industrial application of one-step preparation of higher alcohols from various olefins.

The present invention relates to a calixarene-based ligand, a cobalt catalyst comprising such ligand and its use in hydroformylation processes. The Applicant surprisingly found that the calixarene compound is suitable for forming cobalt catalysts, which have good solubility, catalytic performance, recovery performance, and reuse performance.

Disclosed is a method for the hydroformylation of olefins including 2 to 8 carbon atoms, whereby (i) reacting an inflow containing olefins and an added saturated hydrocarbon comprising 2 to 8 carbon atoms, as well as carbon monoxide and hydrogen, fed into a reaction zone and reacted in the presence of a hydroformylation catalyst, (ii) separating a flow consisting partly of unreacted olefins and saturated hydrocarbons from the discharge from the reaction zone, (iii) separating said flow into an olefin-enriched fraction and an olefin-depleted fraction by means of an olefin-selective membrane, and (iv) removing the olefin-enriched fraction is at least partially redirected into the reaction zone.

A reductive hydroformylation process by reaction between at least one alkene and a gaseous mixture comprising at least carbon monoxide and dihydrogen in the presence of porous catalytic capsules dispersed in at least one organic liquid phase L1. Said porous catalytic capsules, formed from a Pickering emulsion, consist of a liquid core comprising at least one liquid phase L2 comprising at least said reductive hydroformylation catalyst and a porous crust formed by solid particles crosslinked by a crosslinking agent.

The application provides a production device and method and application of acetoxypropanal prepared by a hydroformylation reaction. Under the hydroformylation condition, ethylene acetate, synthesis gas and a hydroformylation catalyst are fed into a first reaction unit to perform a contact reaction. After partial cooling, a first liquid phase product is recycled, and unreacted synthesis gas, a recycled catalyst solution, a crude product and an unreacted stream are sequentially separated by each separation unit. The unreacted stream is fed into a second reaction unit together with another synthesis gas to continue the contact reaction. After light components are separated from the liquid phase product, the catalyst solution is returned to the front separation unit. The technical scheme provided by the application rationally arranges the material flow direction, saves energy consumption and material consumption, effectively improves the reaction efficiency of the reaction unit, reduces the device scale of the reaction unit, reduces the side reaction and can flexibly control the catalyst proportion of each reaction unit.

The present application relates to the technical field of catalyst, in particular to a nickel-based catalyst for olefin hydroformylation reaction, the catalyst comprises an active ingredient and a C carrier, the active ingredient comprises Ni and an auxiliary agent, the active ingredient is loaded on the C carrier, the auxiliary agent is selected from alkali metal and / or alkaline earth metal, the content of the Ni is 0.2-20 wt% based on the total mass of the catalyst, and the content of the auxiliary agent is 0.1-5 wt%. The catalyst has the advantages of low cost, relatively simple preparation process and potential for industrial production application; the catalyst can generate activity phase transition in a relatively short time, thereby effectively improving the overall olefin conversion rate and the selectivity of the product, reducing the occurrence of side reactions; and effectively realizing the preparation of propionaldehyde and propanol by ethylene hydroformylation.

This utility model belongs to the field of chemical metering equipment, and proposes a metering device for hydroformylation, including a Coriolis flowmeter. The Coriolis flowmeter has connecting flanges and shoulders at both ends. Each connecting flange has an elongated structure, which includes a connecting plate, a connecting column, and a blind hole. The blind hole and flange hole are used to weld and form the connecting column. The connecting plates are welded and fixed to each other at their edges. A mounting tube is provided on the side of the connecting plate facing away from the connecting flange. One end of the mounting tube is nested with the shoulder. A mounting flange is provided on the side of the mounting tube near its other end. The mounting flange is used to connect to a metal bellows compensator by bolts. The end of the mounting tube has an annular groove for installing the metal bellows compensator. This utility model has a reasonable design, utilizes an elongated structure to extend both ends of the Coriolis flowmeter, facilitates the installation of the metal bellows compensator, and improves detection performance, making it suitable for large-scale promotion.

The present application relates to a kind of catalytic system for olefin hydroformylation reaction and the method of olefin hydroformylation reaction;Catalytic system includes: fluorine-containing bisphosphinite ligand Ln and rhodium-manganese bimetallic synergistic system.The present application also relates to the preparation method of fluorine-containing bisphosphinite ligand Ln.The fluorine-containing bisphosphinite ligand of the present application is creatively introduced, and its fluorine-containing structure can significantly enhance the chemical inertness of ligand molecule itself, effectively resist decomposition, hydrolysis and degradation under high temperature.The introduction of manganese can not only adjust the catalytic performance of rhodium center through electronic effect, but also can form synergistic effect with rhodium in the reaction, and stabilize the key reaction intermediate, so as to enhance the firmness of the entire catalytic framework at the molecular level, further inhibit the precipitation and agglomeration of rhodium metal and inactivation.In propylene hydroformylation reaction, the conversion rate is generally as high as 99%;In the wide process parameter interval, the conversion rate is not less than 96%, the activity window is wide, and it has great industrial application prospect and economic benefit.