458 results about "Carbonylation" patented technology

The invention discloses a small-grain mordenite molecular sieve as well as a preparation method and application thereof, a crystallization process is directionally controlled by adopting a sectional regulation and control crystallization method, so that the morphology and acid distribution of the molecular sieve are regulated and controlled, and the synthesis method is simple in process and suitable for large-scale industrial production; the grain diameter of the small-grain mordenite molecular sieve obtained by the method disclosed by the invention is 15-300nm; the B acid center of the 8-membered ring pore channel accounts for gt of the total B acid center; the catalyst is used for the carbonylation reaction of dimethyl ether, and has good activity and stability.

The invention discloses a green and efficient carbonyl alkylation pyrrolo [1, 2-a] indole synthesis method, and relates to the technical field of organic synthesis. An alpha-bromocarbonyl compound is used as a carbonyl alkyl source, Ir (ppy) 3 is used as a photosensitizer, potassium hydroxide is used as alkali, sodium dimethyl dithiocarbamate is used as an additive, acetonitrile is used as a solvent, a carbonyl alkylation / cyclization reaction of N-alkenyl substituted indole is realized under the condition of visible light, and corresponding carbonyl alkylation pyrrolo [1, 2-a] indole is obtained. The method is convenient to operate, green and efficient in reaction and wide in substrate applicability.

The invention discloses a non-noble metal catalyst, a preparation method thereof and application of the non-noble metal catalyst in preparation of acetic acid through methane oxidation, and belongs to the field of direct conversion and utilization of methane. The active metal of the catalyst is transition non-noble metal MnOx, and the carrier is an MFI type molecular sieve (ZSM-5). The catalyst can directly react methane and oxygen at low temperature to prepare acetic acid without adding a co-reducing agent and carbonylation raw materials (such as H2 and CO). The nanometer MnOx catalyst has the advantages of mild reaction conditions, high acetic acid selectivity and the like, the acetic acid selectivity can reach 81.8%, and the nanometer MnOx catalyst shows good recycling stability.

The application discloses a radial flow fixed bed catalytic reactor for CO carbonylation coupling to generate oxalate, which comprises a cylindrical container composed of an upper head, a cylindrical barrel and a lower head from top to bottom in sequence, and the cylindrical container is externally provided with a reaction gas feeding port, a reaction gas discharging port, a heat exchange medium inlet, a heat exchange medium outlet, a catalyst feeding port and a catalyst discharging port; a catalytic bed is divided into an adiabatic zone and a heat exchange zone from inside to outside, and the heat exchange zone is provided with multiple groups of concentric circular arranged heat exchange pipes which are arranged in two rows as a group. The radial flow fixed bed catalytic reactor for CO carbonylation coupling to generate oxalate has the characteristics of uniform axial distribution of reaction gas, reasonable bed temperature distribution, high catalyst utilization rate and small reactor pressure drop, and is suitable for the reaction of carbonylation coupling to generate ester and is also suitable for other exothermic gas-solid phase catalytic reactions.

The invention discloses a preparation method and application of an eight-membered ring aluminum-rich mordenite nanosheet. The preparation method comprises the following steps: respectively weighing a silicon source, inorganic alkali, an aluminum source, a template agent Te, water and a metal additive Me according to a molar ratio of 1: (0.1-0.3): (0.02-0.08): (0.1-0.3): (10-40): (0.01-0.1); mixing and stirring the raw materials in an ice-water bath to prepare initial gel; putting the initial gel into a hydrothermal reaction kettle, carrying out hydrothermal crystallization in a drying box, and then centrifuging, filtering and drying to obtain a sodium mordenite molecular sieve; roasting the sodium mordenite molecular sieve to remove the organic template agent; carrying out ammonium ion exchange on the roasted mordenite molecular sieve in a water bath kettle to obtain an ammonium type mordenite molecular sieve; carrying out roasting treatment on the ammonium type mordenite molecular sieve to obtain a hydrogen type octatomic ring aluminum-rich mordenite nanosheet; the eight-membered ring aluminum-rich mordenite nanosheet prepared by the preparation method disclosed by the invention can exert excellent performance in a reaction for preparing acetic acid or methyl acetate through carbonylation of methanol or dimethyl ether.

The invention relates to a synthesis method of 5, 5-disubstituted 2-isoxazoline, according to the method, oxime of a formula (II) and a carbonyl compound of a formula (I) react in the presence of a boron trifluoride complex and in the presence of an optional organic solvent or no solvent, the reaction conditions are mild, and the product yield is high.

The invention provides an energy-saving method and device for producing feed-grade propionic acid by using methanol carbonylation acetic acid waste liquid. The methanol carbonylation acetic acid waste liquid comprises the following components in percentage by mass: 40-80% of acetic acid, 20-60% of propionic acid and the balance of high-boiling residues, the method comprises the following steps: (1) evaporating the waste liquid by adopting a film evaporator with a scraper conical structure at the bottom to obtain a first gas phase and first kettle residues, controlling the evaporation rate to be 50-85% in the evaporation process, and keeping the first kettle residues in a flowing state; 2) directly feeding the first gas phase obtained in the step 1) into a recovery rectifying tower to obtain a second gas phase and crude propionic acid, and condensing the second gas phase to obtain acetic acid; 3, the crude propionic acid obtained in the step 2 passes through a resin tower, trace impurity metal ions are removed, and then the feed-grade propionic acid product is obtained.The method is simple in technological process, low in energy consumption and capable of running continuously, the content of the recycled propionic acid is larger than or equal to 99.5%, and the concentration of the impurity metal ions reaches the feed-grade standard.

The present invention relates to the field of organic synthesis, and more particularly to a method for the oxidation of allylic alcohols to α,β-unsaturated carbonyl compounds in the presence of a zirconium catalyst and a hydrogen acceptor.

The invention relates to the technical field of fuel additives, in particular to an amine hydrate carbon dioxide carbonylation antiknock agent and a preparation method and application thereof.The antiknock agent is obtained by mixing and reacting an amine mixture, a hydrated electron base solution and carbon dioxide, and the mass ratio of the amine mixture to the hydrated electron base solution to the carbon dioxide is (6.0-9.0): (0.8-1.2): (7.0-11.0); the problem of environmental pollution of a traditional antiknock agent and the technical problem of CO2 resource utilization are solved, and collaborative development of greenhouse gas emission reduction and efficient antiknock agent preparation is achieved.

The invention belongs to the technical field of synthesis of 2, 3-dipicolinic acid, and relates to a catalyst for synthesizing 2, 3-dipicolinic acid as well as a preparation method and application thereof, the catalyst is prepared from a carrier, and active components and auxiliaries loaded on the carrier; the carrier is boron nitride modified aluminum oxide, the active component is palladium-cobalt bimetal, and the auxiliary agent is magnesium; the catalyst comprises the following components in percentage by mass: 0.2 wt%-3wt% of palladium, 0.5 wt%-4wt% of cobalt, 0.05 wt%-0.3 wt% of magnesium, 5wt%-15wt% of boron nitride and the balance of an aluminum oxide carrier. The catalyst is prepared by adopting an ultrasonic-assisted sol-gel method, so that high dispersion and strong interaction of active components are realized. The catalyst shows high catalytic activity, high selectivity and excellent stability in a dichloropyridine carbonylation reaction, carbon monoxide is used as a carbonyl source, the atom economy is high, and the green chemical requirement is met.

The present application relates to a system for preparing high-purity MMA, comprising a diethyl ketone separation unit for separating diethyl ketone from ethylene carbonylation products; a condensation reaction unit arranged downstream of the diethyl ketone separation unit, for performing condensation reaction on the product separated by the diethyl ketone separation unit to generate MMA; and a rectification separation unit arranged downstream of the condensation reaction unit, for separating the product of the condensation reaction unit to obtain high-purity MMA. After the synthesis of methyl propionate by ethylene carbonylation, the byproduct DEK is first separated and removed by the diethyl ketone separation unit, and the methyl propionate and methanol material containing the diethyl ketone after removal are subjected to condensation reaction with formaldehyde to generate MMA, effectively avoiding the problem of difficult separation of diethyl ketone DEK and MMA with very similar boiling points, and then high-purity MMA is easily obtained by separation.

A method for the generation of a gas mixture including carbon monoxide, carbon dioxide and optionally hydrogen for use in hydroformylation plants or in carbonylation plants, including mixing an optional steam with carbon dioxide in the desired molar ratio, feeding the resulting gas to a solid oxide electrolysis cell (SOEC) or an SOEC stack at a sufficient temperature for the cell or cell stack to operate while effecting a partial conversion of carbon dioxide to carbon monoxide and optionally of steam to hydrogen, removing some or all the remaining steam from the raw product gas stream by cooling the raw product gas stream and separating the remaining product gas from a liquid, and using the gas mixture containing CO and CO2 for liquid phase synthesis reactions utilizing carbon monoxide as one of the reactants while recycling CO2 to the SOEC or SOEC stack.

The invention discloses a method for preparing isobutyric acid through propylene carbonylation, and belongs to the field of catalytic chemistry. The method comprises the following steps: enabling raw materials containing propylene, carbon monoxide and water to pass through a reactor loaded with an acidic molecular sieve catalyst, and reacting to obtain a product containing isobutyric acid, the acidic molecular sieve catalyst is selected from at least one of a hydrogen type ZSM-35 molecular sieve, a hydrogen type ZSM-11 molecular sieve, a hydrogen type ZSM-5 molecular sieve, a hydrogen type ZSM-57 molecular sieve, a hydrogen type ZSM-23 molecular sieve, a hydrogen type ZSM-22 acidic molecular sieve and a hydrogen type MCM-22 molecular sieve. According to the isobutyric acid preparation method, raw materials are cheap and easy to obtain, system corrosivity is small, products are easy to separate, emission of three wastes is small, a fixed bed process is easy to engineer, and the method is suitable for single-set large-scale production.

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 provides an olefin hydrocarbonylation method which comprises the following step: olefin as shown in a formula (1), a nucleophilic reagent as shown in a formula (2) and carbon monoxide are subjected to a hydrocarbonylation reaction under the action of a metal catalyst, a ligand, protonic acid and optional iodide under the condition of illumination. According to the present invention, olefin represented by a formula (1), a nucleophilic reagent represented by a formula (2) and carbon monoxide are adopted as raw materials, and under the action of a metal catalyst, a ligand, a protonic acid and an optional iodide, a hydrocarbonylation reaction is performed under the illumination condition so as to obtain carboxylic acid / ester / amide / thioester and other products; the method provided by the invention can be realized at normal temperature and normal pressure, does not need special equipment, has low potential safety hazard and low energy consumption, greatly reduces the cost of large-scale production of carboxylic acid / ester / amide / thioester, and provides a novel green and efficient synthesis process for industrial production of carboxylic acid / ester / amide / thioester.

Provided is a method for producing a carbonyl compound using light energy, the method being characterized by irradiating a substrate with light having a wavelength of 200-420 nm in the presence of a tetrahalomethane to react the substrate. The method, which is for producing a carbonyl compound, e.g., an ester, a lactone, a carboxylic acid, an amide, a thioester, or a ketone, makes it possible to obtain the carbonyl compound directly from a substrate without using a heavy metal or the like in a stoichiometric amount.

The application provides a reverse Markovnikov hydroamination reaction of trifluoromethyl enone under catalyst-free and base-free conditions, uses a sulfonhydrazide compound with good functional group tolerance as a nitrogen source, realizes the introduction of a nitrogen-containing functional group in a green and environment-friendly manner, and synthesizes a series of alpha-sulfonhydrazine-alpha-hexafluoroisopropyl-substituted carbonyl compounds. The method has the characteristics of no transition metal participation, mild conditions, wide substrate universality and the like.

The method for non-targeted mass spectrometric identification of tobacco carbonyl components includes the steps of: (1) preparing a tobacco sample extract; (2) derivatizing the extract with 2,4-dinitrophenylhydrazine (DNPH) to obtain a first tobacco sample; (3) derivatizing the extract with DNPH-d3 instead of DNPH to obtain a second tobacco sample; (4) preparing a mixed tobacco sample; (5) preparing a blank sample; (6) performing UPLC-Orbitrap-HRMS analysis on each of the first tobacco sample, the second tobacco sample, the mixed tobacco sample, and the blank sample to obtain LC-MS raw data; (7) processing the LC-MS raw data to obtain raw mass spectrometry characteristic data; (8) performing multistage filtering on the raw mass spectrometry characteristic data; and (9) performing structural annotation or identification on the finally retained chromatographic peaks to obtain tobacco carbonyl components. By performing multi-stage filtering on the mass spectrometry profile data, the chromatographic-mass spectrometry information of noise or interference components in the raw data set can be rapidly removed to obtain compositional information of aldehyde and ketone chemical components in cigarettes.

An electrochemical cell includes: a cathode having a first catalyst that reduces carbon dioxide to carbon monoxide; an anode; an electrolyte solution containing a reactant and an electrolyte; and a second catalyst that synthesizes a carbonyl compound from the carbon monoxide and the reactant.

The invention relates to the technical field of biological medicine, in particular to a novel amino acid or polypeptide side chain carbonylation modification reagent which can be used as a novel carbonylation reagent in a method for synthesizing gamma-C (sp3)-H bond carbonylation amino acid or polypeptide through palladium catalysis. Substituting ethylene with a novel carbonylation reagent 1-iodine-2-bromine under the action of a palladium catalyst, an additive and a solvent to realize carbonylation and methylation of the amino acid gamma-C (sp3)-H bond. The method disclosed by the invention has the beneficial effects that a novel carbonylation reagent easy to prepare is developed, substrate raw materials are easy to obtain, the operation is simple and convenient, the condition is mild, the substrate application range is wide, and a plurality of carbonylated amino acids and polypeptide derivatives can be efficiently and accurately synthesized at low cost; and a novel method is provided for modification of unnatural amino acids and polypeptide side chains.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a preparation method of a novel NaY molecular sieve supported palladium and metal additive catalyst for co-production of dimethyl carbonate, the catalyst mainly comprises 0.1-3.0% by mass of Pd active component, 0.1-10.0% by mass of metal additive and 0.1-10.0% by mass of NaY molecular sieve carrier. The metal auxiliary agent not only effectively eliminates acid in the catalyst, but also promotes the generation of high-valence Pd active species, and the Pd active species are stabilized by utilizing the electron withdrawing effect of the auxiliary agent on the Pd active species. The catalyst is applied to a reaction for synthesizing dimethyl carbonate by carbonylation of methyl nitrite in a process of co-producing ethylene glycol from coal and co-producing dimethyl carbonate, shows excellent catalytic performance, and has certain industrial application prospects.

The invention belongs to the field of organic synthesis, and provides a synthesis method of a novel acrylate monomer with a bifunctional structure, which comprises the following steps: S1, reacting an ester group-containing alcohol compound with a carbonylation reagent to obtain an intermediate product A; s2, acidifying an alcohol amine compound, and reacting with an acryloyl reagent to obtain an intermediate product B; s3, reacting the intermediate product A with the intermediate product B to obtain a target product C, namely the novel acrylate monomer with the bifunctional structure; wherein R1 is hydrogen or alkyl, R2 is an organic group containing an ester group, m is an integer greater than or equal to 1, R3 and R4 are independently selected from at least one of arene oxyl, halogenated hydrocarbon oxyl or heterocyclic ring containing nitrogen atoms, R5 is alkylene, and L is selected from at least one of halogen atoms, hydroxyl or hydrocarbon oxyl. The method is simple to operate, the reaction process is easy to control and realize, and industrial production is easy.

The application provides a bidentate phosphite polymer, a preparation method and application thereof, and a method for olefin carbonyl synthesis reaction. The bidentate phosphite polymer provided by the application is shown in formula (I) and is copolymerized by a specific bidentate phosphite ligand and 2-vinyl naphthalene. The bidentate phosphite polymer can be used in catalyzing the olefin carbonyl synthesis reaction, can not only ensure the catalytic performance of the olefin carbonyl synthesis reaction, but also can improve the solvent swelling resistance of the polymer, thereby being beneficial to ensuring the catalyst form stability and being beneficial to the stable production of aldehydes synthesized by the olefin carbonyl synthesis.

This invention provides a method for preparing chiral epoxy compounds, chiral β-lactones, and polyhydroxyalkanoates. The method involves three steps: chiral resolution of the epoxy compound, carbonylation of the chiral epoxy compound to prepare a chiral β-lactone, and ring-opening polymerization of the β-lactone. Using this method, polyhydroxyalkanoates with good tensile strength and toughness, as well as a wide processing window, can be prepared. This invention has advantages such as simple steps, low raw material costs, and no need to introduce a second monomer, making it easy to scale up production.

The application discloses a method and device for improving detoxification replacement efficiency of materials containing carbonyl substances, and belongs to the technical field of carbonylation metallurgy safety production. The application adopts the mode of hot nitrogen gas and cold nitrogen gas alternately passivating replacement, replaces the traditional single cold nitrogen gas continuous purging process, and adopts multiple pressure increase-pressure release pulse type operation for each round of replacement; the supporting device is provided with a parallel hot nitrogen gas supply unit and a cold nitrogen gas supply unit, a DCS interlocking control system and an annular tangent air inlet pipeline at the bottom of a storage bin. The application greatly improves the replacement efficiency and completeness of the materials containing carbonyl substances, shortens the replacement time by more than 80%, avoids problems such as material hardening, channeling and burning of material bags caused by continuous high temperature, guarantees continuous, stable and safe operation of carbonylation metallurgy production, and reduces production cost.

The invention discloses a method for preparing high-purity nickel through carbonylation of nickel chloride, belongs to the technical field of carbonylation metallurgy, and solves the problem that a high-purity nickel product cannot be prepared due to the fact that nickel pellets and nickel powder produced through an existing carbonylation method contain many impurities. The construction method comprises the following steps: adding water to dissolve NiCl2, preparing a solution, heating, adding analytically pure AlCl3 with the concentration of 1%-3%, mixing with H2O2, adding ammonia water into the mixed solution to adjust the pH value, continuously reacting, carrying out solid-liquid separation in the solution, extracting the ammonia water mixed solution at the upper end, carrying out carbonylation reaction, converting nickel chloride into carbonyl nickel gas, then converting the carbonyl nickel gas into liquid carbonyl nickel, and carrying out solid-liquid separation in the liquid carbonyl nickel gas. Liquid nickel carbonyl is gasified in a volatilizer and mixed with inert gas Ar, and then the mixture is introduced into a decomposer of nickel shots or nickel powder to produce high-purity nickel. The method is stable, reliable and convenient, preparation of the high-purity nickel with 99.999% (5N) Ni is achieved by optimizing the carbonylation method, mass production of the multipurpose high-purity nickel provides a wide prospect for high-quality development of new materials, and the application prospect is wide.

The present invention provides a preparation which can use silver skin as a functional material for cosmetic effect-related applications. The preparation contains an extract derived from silver skin as an active ingredient, and is intended at least to inhibit skin darkness or prevent wrinkle formation. Wherein the preparation contains an elastin inhibitor component derived from a silver skin extract, and is used for preventing the formation of wrinkles. In addition, the preparation contains at least one of a glycosylation inhibitor component derived from a silver skin extract, a carbonylation inhibitor component of a protein, a nitration inhibitor component of a protein, and a nitrotyrosine decomposer component, and is used for inhibiting darkness.

The invention discloses a preparation method and application of 1, 4-bis (diphenylphosphine) butane platinum dichloride (II), and the preparation method comprises the following steps: (1) mixing absolute methanol and dichloromethane, carrying out deoxidation treatment, and adding 1, 4-bis (diphenylphosphine) butane into the mixture; (2) dissolving potassium chloroplatinite in distilled water, filtering insoluble impurities, dropwise adding the potassium chloroplatinite into the reaction system in the step (1) under the protection of inert gas while keeping a stirring state, and after dropwise adding, heating, refluxing and stirring for reaction; (3) carrying out filter pressing under the protection of inert gas, passing through a silica gel column, and collecting filtrate; (4) concentrating the filtrate, and then adding an organic solvent for pulping; and (5) carrying out filter pressing under the protection of inert gas, washing a filter cake, and carrying out vacuum drying. According to the preparation method, the product yield is high, the purity is high, and the obtained 1, 4-bis (diphenylphosphine) butane platinum dichloride (II) is used for hydrogenation reaction of carbonyl compounds and has good catalytic performance.

Provided is a one-pot process for preparing propionic acid, which comprises (i) treating ethylene with a C1-C6 alkanol, water, and carbon monoxide in the presence of a catalyst system comprising the reaction product of (a) a Group 8 to 10 transition metal compound such as a palladium or ruthenium compound; and (b) an activating anion, at elevated temperature and pressure. The process also provides a facile, continuous process for the preparation of propionic acid via the alkoxycarbonylation of ethylene at elevated temperature and pressure followed by hydrolysis, in one reaction vessel.

A cardanol based coupling agent is disclosed. The coupling agent is obtained by reacting 3-pentadecyl phenol ethoxylate with sulfur to obtain a sulfurized 3-pentadecyl phenol ethoxylate and reacting the sulfurized 3-pentadecyl phenol ethoxylate with a carbonyl compound. A process for preparing a cardanol based coupling agent is also disclosed. The process comprises reacting 3-pentadecyl phenol ethoxylate with sulfur to obtain a sulfurized 3-pentadecyl phenol ethoxylate and reacting the sulfurized 3-pentadecyl phenol ethoxylate with a carbonyl compound.