626 results about "Carbonylation" patented technology

The invention belongs to the field of iron high-valued treatment and tailing reduction, and relates to an iron high-valued treatment and tailing reduction recovery method for multi-source neodymium iron boron secondary resources. In order to solve the problems of iron tailing treatment and high-value utilization of iron elements in the secondary resource recovery process of the neodymium iron boron waste, the invention develops a new process of'oxidizing roasting, carbonylation method iron extraction and wet process rare earth recovery ', so that effective extraction of rare earth elements is realized, high-value recovery of iron is promoted, and the generation amount of tailings is reduced. According to the technology, 60%-86% of iron elements in the neodymium iron boron magnetic material waste can be prepared into pentacarbonyl iron with the high additional value, then pentacarbonyl iron can be pyrolyzed to prepare a carbonyl iron powder product, the amount of iron tailings obtained after rare earth leaching is 350-600 kg / t of raw materials, and the output of the iron tailings is only 40%-60% of iron tailings generated after rare earth magnetic materials are recycled through a conventional roasting-hydrochloric acid optimal solution method. The new process can provide powerful guarantee for efficient and high-value utilization of neodymium iron boron waste and tailing reduction.

The invention discloses a short c-axis flaky mordenite molecular sieve as well as a preparation method and application thereof, and belongs to the technical field of molecular sieves. The chemical composition of the short c-axis flaky mordenite molecular sieve is Ra.Mb. (SixAly) O2, r is a template agent tetraethylammonium ion; a is the mole number of R in each mole of (SixAly) O2, and a is more than or equal to 0.02 and less than or equal to 0.04; m is an alkali metal ion; b is the mole number of M in each mole of (SixAly) O2, and b is more than or equal to 0.02 and less than or equal to 0.06; x is the mole fraction of Si in each mole of (SixAly) O2, and x is more than or equal to 0.9 and less than or equal to 0.97; y is the mole fraction of Al in each mole of (SixAly) O2, y is more than or equal to 0.03 and less than or equal to 0.1, and x + y is equal to 1; and the dimension thickness of the stone molecular sieve in the c-axis direction is 20-80 nanometers. The molecular sieve shows excellent catalytic performance in a catalytic reaction for preparing methyl acetate through dimethyl ether carbonylation.

The invention relates to the technical field of carbonylation, and discloses a phosphine nitrogen compound and a metal complex as well as a preparation method, a composition and application thereof and a carbonylation reaction method. Wherein the phosphine-nitrogen compound has a chemical structure as shown in a formula (II), and the metal complex prepared from the phosphine-nitrogen compound has the characteristics of high catalytic activity, good thermal stability, difficulty in inactivation and high product selectivity in catalytic carbonylation reaction. # imgabs0 #

The invention discloses a method for recovering platinum and palladium from high-cobalt nickel-containing carbonylation slag, and relates to the technical field of non-ferrous metal carbonylation metallurgy, the method comprises the following steps: S1, hydrogen reduction and activation; s2, feeding into a high-pressure carbonylation reactor; and S3, efficient carbonylation. According to the method, the carbonylation slag is subjected to hydrogen reduction activation treatment, nickel protoxide and cobalt oxide are changed into simple substance nickel, the simple substance nickel is fed into a carbonylation reactor for carbonylation under the protection of reducing gas or inert gas after activation treatment, 95% of Ni, 85% of Fe and 80% of Co are carbonylated to enter a gas phase after carbonylation, bonding of cobalt and a platinum solid solution is broken through carbonylation, and the nickel-cobalt-cobalt-cobalt-cobalt alloy is obtained. Nickel protoxide is difficult to dissolve in various strong acids and oxidizing acids, and a foundation is laid for further separation of base metals and non-metallic element sulfur from precious metals to produce high-grade platinum concentrate.

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 relates to a multifunctional tandem catalytic process for directly preparing methyl acetate / ethanol from synthesis gas. According to the process, a novel catalyst for preparing dimethyl ether from synthesis gas is prepared by adopting an impregnation method, and after the catalyst is sequentially connected with a dimethyl ether carbonylation catalyst and a hydrogenation catalyst in series, efficient directional synthesis of methyl acetate and ethanol is realized in a double-bed or three-bed sequential filling form. According to the invention, high CO conversion per pass, high methyl acetate selectivity and low acetic acid selectivity can be realized, and the problems of corrosion and difficult conversion of a subsequent hydrogenation system are effectively avoided; the multifunctional catalytic system provided by the invention is simple in preparation method and easy to realize industrial large-scale production.

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 provides a method for removing metal impurity ions in a carbonylation synthesis acetic acid catalyst solution and filtering equipment thereof, and belongs to the technical field of metal impurity ion removal in the carbonylation synthesis acetic acid catalyst solution. Comprising the following steps: S1, carrying out preliminary adsorption on heavy metal ion impurities through strong-acid ion exchange resin, S2, carrying out circulating filtration adsorption through a filter assembly, and guiding the adsorbed carbonylation synthesis acetic acid catalyst solution into a cooling chamber, S3, pouring clear water into a processing barrel, and carrying out treatment for 2-3 hours. And the cleaned water-liquid mixture is subjected to centralized adsorption treatment through the magnetic adsorption rod. By arranging the cleaning assembly, the cleaning effect on the inner face and the outer face of the metal filter plate is achieved, the filter assembly does not need to be detached and cleaned independently, the cleaning effect on residual heavy metal ion impurities is further improved, and meanwhile the cleaning efficiency of the filter assembly is improved.

The invention provides a method for preparing dicarboxylate by palladium-double ligand tandem catalysis of carbonylation of 1, 3-conjugated diene, and the method comprises the following steps: adding 1, 3-conjugated diene into a reaction solution containing a palladium cation source, a first ligand monodentate phosphine ligand L1, a second ligand bidentate phosphine ligand L2, an anion source and alcohol, then adding a carbonyl source, and reacting to obtain the dicarboxylate. The dicarboxylic acid ester is obtained. According to the invention, a tandem catalysis strategy is adopted, two ligands of monodentate phosphine and bidentate phosphine are introduced at the same time, a palladium catalysis tandem system is constructed, the dicarboxylate is directly prepared from 1, 3-conjugated diene by a one-pot method, the dosage of the expensive bidentate phosphine ligand is effectively reduced under the same catalysis efficiency, and the use of organic strong acid as an auxiliary agent can be avoided; and the requirement on the material of the reactor is reduced.

The invention relates to the technical field of recycling of cast nickel-based high-temperature alloy return scraps, and particularly discloses a method for extracting valuable metals in high-temperature alloy return scraps through carbonylation metallurgy. Comprising the steps of sulfuration smelting of the return scrap, carbonylation nickel extraction of the return scrap, chlorination of the material after nickel extraction, and graded carbonylation tungsten, chromium and molybdenum extraction, and nickel, chromium, tungsten and molybdenum in the cast nickel-based high-temperature alloy return scrap can be prepared into high-purity metal products by utilizing the characteristic of high selectivity of the carbonylation process. The nickel-based high-temperature alloy tailings can be directly sold as products in the forms of nickel carbonyl, chromium carbonyl, tungsten carbonyl and molybdenum carbonyl, meanwhile, the enrichment of rare and precious metals in the nickel-based high-temperature alloy tailings is realized, CO gas and chlorine gas used in the extraction process can be recycled, and the process can ensure the product quality while saving the cost, and is suitable for industrial production. And the method has huge economic benefits and relatively high popularization and implementation values.

The invention belongs to the technical field of organic synthesis, and discloses a 5-hydroxybenzofuran derivative and a preparation method thereof. The structural formula of the 5-hydroxybenzofuran derivative is as shown in formula (I), and R1, R2 and R3 are respectively C1-C20 alkyl, ester group, carbonyl, nitro and the like, and C5-C30 aryl or heteroaromatic ring group. Based on indirect oxidation and coupling cyclization strategies, a beta-dicarbonyl compound and hydroquinone which are simple and easy to obtain are used as substrate raw materials, and various 5-hydroxybenzofuran derivatives with different substituent groups are constructed in combination with an oxidizing agent and a catalyst. The 5-hydroxybenzofuran derivative disclosed by the invention is expected to obtain an excellent application prospect in later modification and development of new drugs and novel materials. # imgabs0 #

The invention discloses a preparation method of fluoroether, an electrolyte, a battery and a power utilization device. The invention relates to the technical field of batteries, in particular to a preparation method of fluoroether, an electrolyte, a battery and a power utilization device. The preparation method of the fluoro-ether comprises the following steps: reacting a metal fluoride solution with a carbonyl compound and an alkyl compound to obtain the fluoro-ether, wherein the fluoroether has a simple structural formula as shown in a formula (I), and R1 is straight-chain or branched-chain alkane; r2 is fluoroalkane, wherein the number of fluorine atoms is 4. The invention provides a novel fluoro-ether synthesis route which can be carried out in a normal pressure environment, the process is simple, the post-treatment is simple, the yield of fluoro-ether is improved, side reactions are reduced, and the product is easy to separate.

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 provides a synthetic method of condensed epoxy glycoside, which comprises the following steps: mixing a 1, 3-dicarbonyl compound, alkali and a 2, 3-unsaturated glycosyl donor, adding an organic solvent for reaction, monitoring the reaction process by TLC (Thin Layer Chromatography), and terminating the reaction when the 2, 3-unsaturated glycosyl donor completely disappears, thereby obtaining the condensed epoxy glycoside. The alkali used in the method is DBU, so that a condensed epoxy glycoside product with high yield and high selectivity can be generated. According to the method, after condition screening, the high-yield and high-selectivity fused epoxy glycoside can be generated by only one-step reaction without using a noble metal catalyst and only using cheap alkali, and the commercial 1, 3-dicarbonyl compound and alkali are adopted as reaction conditions, so that the cost of generating oxygen glycoside is greatly reduced.

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 a synthesis method of alpha condensed ring C-glycoside, which comprises the following steps: mixing a catalyst, a ligand, an additive, a 1, 3-dicarbonyl compound and a 2, 3-unsaturated glycosyl donor, adding an organic solvent, reacting at room temperature, monitoring the reaction process by TLC (Thin Layer Chromatography), and terminating the reaction when the 1, 3-dicarbonyl compound completely disappears, thereby obtaining the alpha condensed ring C-glycoside. The catalyst Co (THMD) 3 used in the invention can catalytically generate a carbon glycoside product with high yield.

A process reacts olefins having 4 to 20 carbon atoms and the feed stream used, containing at least linear olefins and branched olefins, is distilled between two reaction steps and only the high-boiler phase obtained in this distillation is subjected to the second reaction, a heterogeneously catalysed hydroformylation, a homogeneously catalysed hydroformylation or a homogeneously catalysed alkoxycarbonylation.

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 provides an acetic acid preparation system and method. The system comprises a catalyst pipeline, a methanol pipeline, a carbon monoxide pipeline, a first heat exchanger, a second heat exchanger, a carbonyl reactor, an evaporator, a light component removal tower, a dehydration tower and a finished product tower, a top outlet of the evaporator is communicated with a light component removal tower, the light component removal tower is communicated with a dehydration tower, the dehydration tower is communicated with a finished product tower, and the side wall of the finished product tower is connected with a product pipeline; the product pipeline and the methanol pipeline are coupled for heat exchange through the first heat exchanger; the bottom outlet of the light component removal tower is connected with the side wall of the light component removal tower through the second heat exchanger; the methanol pipeline and the catalyst pipeline are connected with the carbonyl reactor; a catalyst circulating pipe is arranged on one side of the carbonyl reactor, an inlet of the catalyst circulating pipe is connected with the bottom of the carbonyl reactor, and an outlet is connected with the upper part of the carbonyl reactor and positioned below the liquid level. By applying the system, the raw material conversion rate and the product yield can be improved.

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 invention discloses a preparation method and application of a carbonylation catalyst. The method comprises the following steps: 1) mixing a silicon source, an aluminum source, an alkali, water and a template A in a certain mass ratio, transferring the mixture to a pre-crystallization kettle for pre-crystallization, filtering and drying to obtain a precursor; 2) forming the precursor and a binder, and then transferring the mixture to a crystallization solution containing templates B+C for crystallization, filtering, washing and drying after the crystallization, and roasting-exchanging-re-roasting to obtain a molecular sieve catalyst. The molecular sieve catalyst is used for the carbonylation reaction of dimethyl ether and carbon monoxide. The molecular sieve catalyst has a higher yield and exhibits better performance. The present invention has the advantages of simple preparation process, high raw material utilization rate, and good industrial application prospects.

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.

The invention discloses a Cr-Mo-Nb alloy and a production method thereof, belongs to the field of metal regeneration and cyclic utilization, and solves the problem that the treatment mode of an existing high-temperature alloy difficult-to-treat material is backward. The alloy comprises the following chemical components in percentage by mass: 22-26% of Mo, 9-13% of Nb, less than or equal to 2% of C and the balance of Cr and inevitable impurity elements, and the production method comprises the following production steps: briquetting one or more of nickel-based alloys to generate an alloy briquetting; then smelting is conducted, the smelted alloy is subjected to water quenching through a nickel sulfate solution, and alloy particles are generated; then carbonylation synthesis treatment is carried out, nickel carbonyl and carbonylation slag are obtained after carbonylation synthesis treatment, the carbonylation slag is subjected to hydraulic classification, and the carbonylation slag is divided into a light component material and a heavy component material; and mixing the heavy component material with graphite powder, briquetting, and carrying out reduction roasting to obtain the Cr-Mo-Nb alloy. The device saves time and labor, is high in adaptability, can effectively treat difficult-to-treat materials piled up for a long time in a factory, and greatly facilitates work of the factory.

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