17results about "Preparation by halogen halide addition" patented technology

The application discloses a polyethylene nanofiber supported gold-ion liquid catalyst for catalyzing acetylene hydrochlorination reaction and a preparation and application thereof. The polyethylene nanofiber supported gold-ion liquid catalyst comprises a carrier and a gold active component and an ion liquid supported on the carrier, and the carrier is polyethylene nanofiber. The application provides application of the polyethylene nanofiber supported gold-ion liquid catalyst in a reaction of catalyzing acetylene hydrochlorination to synthesize chloroethylene, solves the problems of reduction loss of high-valence Au and carbonization denaturation or even loss of the ion liquid caused by reaction heat of the supported Au-ion liquid system catalyst in the acetylene hydrochlorination reaction, and makes the catalyst have higher stability.

This specification describes a method for producing vinyl chloride monomer (VCM) from acetylene and HCl. This method involves a primary reactor and a secondary reactor, each containing a hydrogenation catalyst. The feed from the primary reactor is sent to a knockout drum. The feed from the secondary reactor is split, with a portion combined with the feed from the primary reactor, while the other portion is sent to a vent recovery unit. The vent recovery unit includes one or more stages where a liquid containing VCM is separated and sent directly to the KO drum. Low-temperature vapor is generated from the KO drum, sent to a compressor, and subsequently sent to a light component separation unit and a light component column.

The present invention provides a method for preparing a supported carbon catalyst, the method comprises at least the following steps: (1) contacting a gas containing an organic silicon source with a silicon oxide-based material to obtain a precursor; (2) contacting the precursor with a gas containing an organic carbon source to obtain the supported carbon catalyst. The temperature and energy consumption of the chemical vapor deposition of heteroatom-containing carbon material on silica-based materials can be greatly reduced in this method, and the cost of the catalyst can be effectively reduced.

A method for preparing vinyl chloride by hydrochlorination of acetylene, using a mercury-free non-noble metal Ni-based monatomic catalyst with Ni-N coordination structure. The preparation method of the catalyst comprises the following steps: 1) mixing a nitrogen source, a carbon source and a Ni salt by ball milling; 2) adding ethanol and a hydrochloric acid solution to the mixed powder obtained in step 1, and grinding and drying to obtain a precursor; 3) passing ammonia, and roasting the precursor obtained in step 2 to obtain a Ni-doped nitrogen-carbon catalyst. The Ni-doped nitrogen-carbon catalyst has excellent catalytic performance in the reaction of preparing vinyl chloride by hydrochlorination of acetylene, has excellent catalytic activity and stability, and has the advantages of simple preparation method, low cost and environmental friendliness.

This invention relates to a gold-based catalyst for the hydrochlorination of acetylene and its regeneration method, belonging to the field of chemical engineering. The catalyst is prepared by impregnation using microporous activated carbon as a support, loading gold active component HAuCl4, copper additive CuCl2·2H2O, and trichloroisocyanuric acid (TCCA) organic ligand. The regeneration method includes solvent cleaning to remove surface impurities, high-temperature calcination at 600°C under an inert atmosphere to remove carbon deposits, and TCCA solution impregnation to achieve re-oxidation of gold species. This method utilizes the dual-effect function of TCCA to precisely control the electronic structure of gold, avoiding excessive gold reduction and carbon deposition deactivation. After regeneration, the acetylene conversion rate of the catalyst recovers to over 65%, effectively solving the deactivation problem of gold-based catalysts and reducing industrial application costs.

The present invention discloses a method for preparing acetaldehyde and 1,2-dichloroethane, which relates to the technical field of chemical industry. The preparation method of the present invention uses ethylene glycol and hydrogen chloride as reaction raw materials, employs a multi-stage series kettle-type distillation reactor, and continuously produces acetaldehyde and 1,2-dichloroethane under the action of a catalyst, at a certain pressure and a certain temperature. The characteristic of this method lies in utilizing the distillation reactor to continuously remove the generated low-boiling acetaldehyde and dichloroethane, and connecting multiple kettle-type distillation reactors in series to enhance the reaction efficiency, thereby representing a novel and efficient approach for producing acetaldehyde and 1,2-dichloroethane.

The application discloses a supported gold catalyst for acetylene hydrochlorination reaction and preparation and application thereof. The supported gold catalyst comprises a carrier and a gold active component supported on the carrier, and the carrier is a rare earth element nitride. The application adopts a rare earth metal nitride as the carrier, supports gold to form a catalyst for acetylene hydrochlorination reaction, and can obviously improve acetylene conversion rate and catalyst stability compared with a conventional activated carbon carrier.

The application provides a rare earth metal platinum-based catalyst and a preparation method and application thereof, and belongs to the technical field of catalyst materials.The catalyst is prepared by using pretreated coconut shell activated carbon as a carrier, platinum as an active component and rare earth metal chloride as an additive through an impregnation method; in the catalyst, Pt is highly dispersed on the surface of the carrier and in the pores in the form of metal elementary substance nanoparticles with an average particle size of 1-3 nm; and the rare earth metal effectively inhibits the sintering and carbon deposition of Pt particles through electronic regulation and geometric isolation, thereby significantly improving the catalytic activity and long-term operation stability of the catalyst in the ethyne hydrochlorination reaction.The preparation method of the catalyst is simple in process and good in repeatability, and the prepared catalyst exhibits excellent catalytic performance at a low Pt loading, and has industrial application potential.

The application discloses a kind of boron, sulfur functional group modified carrier's ultra-low mercury catalyst and its preparation method, belong to acetylene hydrochlorination catalysis technical field.The catalyst is active carbon as carrier, by boron, sulfur functional group's synergic modification, load main catalyst mercuric chloride, and the cocatalyst is potassium fluoride and cesium fluoride.The catalyst of the application utilizes the synergic effect of boron, sulfur functional group, greatly enhances the anchoring capacity of carrier to HgCl2, effectively inhibits the loss of mercury, shows high catalytic conversion rate and super-long service life in acetylene hydrogen chloro gas reaction, with significant industrial application value and environmental protection significance.

The application discloses a method for coupling production of 1,1,2-trifluoroethane and acetylene to prepare 1,2-difluoroethylene and fluoroethylene, which comprises the following steps: under the action of a coupling catalyst, raw material 1,1,2-trifluoroethane is subjected to a dehydrofluorination reaction to obtain 1,2-difluoroethylene, and by-product hydrogen fluoride is subjected to an addition reaction with raw material acetylene to obtain fluoroethylene; the coupling catalyst comprises a first component A, a second component B and a carrier M, the first component A is a metal fluoride or a metal salt, and the second component B is a metal element; the metal in the first component A is selected from one or a combination of at least two of Al, Fe, Ni, Cu, Zn or Mn; and the second component B is selected from one or a combination of at least two of Pd, Ru, Pt, Ir, Ag or a rare earth metal. The method realizes resource utilization of raw materials and by-products, has high selectivity of target products, and solves the problems of the use of existing industrial by-product HFC-143 and the high energy consumption and large amount of waste of the catalytic dehydrofluorination reaction of the by-product HFC-143.

The application provides a converter outlet mixed gas treatment system and method. The converter outlet mixed gas treatment system comprises a converter outlet pipeline, a condensing separation device and a vaporization device, two ends of the converter outlet pipeline are connected with an outlet of a converter and an inlet of a purification device respectively, a first end of the condensing separation device and a first end of the vaporization device are connected with the converter outlet pipeline, a second end of the condensing separation device is connected with a second end of the vaporization device, the first end of the condensing separation device and the first end of the vaporization device are located between the outlet of the converter and the inlet of the purification device, and a third end of the condensing separation device is connected with an inlet of the converter through a pipeline.

A composite metal organic framework catalyst for catalyzing acetylene hydrochlorination reaction, comprising an active component, a carrier and a metal organic framework ligand; the catalyst uses activated carbon as the carrier and copper salt as the active component, by adding a synergistic metal and a metal organic framework ligand containing a lone pair of electrons and an electron-withdrawing group, the metal ion is centered and the ligand is coordinated with each other through self-assembly to form a three-dimensional connected pore network structure, which has a strong anchoring and dispersion effect on the metal ion, thereby improving the activity and thermal stability of the catalyst; the catalyst is used for acetylene hydrochlorination reaction, has the characteristics of good catalytic stability, high activity, low cost and simple preparation process, and has great industrial application prospect.

The application discloses an ethyne hydrochlorination reaction catalyst, which is prepared by stirring nitrogen-containing precursors, phosphorus-containing precursors, copper sources and organic solvents uniformly, drying, high-temperature calcination and acid washing; the nitrogen-containing precursors are one or more of 1-butyl-3-methyl imidazole bromide, 1-butyl-3-methyl imidazole chloride, 2-methyl imidazole and pyridine; the phosphorus-containing precursors are one or more of phosphoric acid, triphenyl phosphine, tetraphenyl phosphonium bromide and tetraphenyl phosphonium chloride; and the copper source is copper chloride or copper nitrate. The catalyst obtained by the application has the advantages of high stability and high activity.

The application discloses a preparation method of a bimetallic complex catalyst for acetylene hydrochlorination reaction, and comprises the following steps: mixing an aldehyde compound and an amine compound in a solvent at room temperature, sufficiently stirring to react to generate a polydentate ligand, then adding copper salt and cobalt salt, and sufficiently stirring to react to generate a bimetallic complex, mixing the obtained reaction solution with an activated carbon carrier which is subjected to acid pickling, and after impregnation by sufficiently stirring, drying and cooling, the bimetallic complex catalyst for acetylene hydrochlorination reaction is obtained. The bimetallic complex catalyst prepared by the method has good activity and carbon deposition resistance, and has good catalytic activity, vinyl chloride selectivity and stability in the process of acetylene hydrochlorination reaction to generate vinyl chloride.

The application provides a carbon-supported monatomic gold catalyst and a preparation method and application thereof, and belongs to the technical field of catalyst materials. The carbon-supported monatomic gold catalyst is surface-modified by a hydrophilic polymer on activated carbon to obtain a carbon carrier modified by the hydrophilic polymer, and then a sulfur-containing anion ionic liquid is introduced as a ligand, and finally, a gold active component is loaded in a monatomic form. The application solves the problems of easy agglomeration and deactivation of a traditional gold-based catalyst in a strong acid high-temperature environment and poor stability of monatomic gold. Through the synergistic effect of the hydrophilic polymer and the sulfur-containing anion ionic liquid ligand, the hydrophilicity and hydrophobicity of the surface of the carrier are optimized, the adsorption and diffusion of reactants are enhanced, and the firm anchoring and high dispersion of monatomic gold are realized through strong sulfur-gold coordination. The prepared catalyst shows high catalytic activity, high vinyl chloride selectivity and excellent long-term stability in the ethyne hydrochlorination reaction.

To provide a process for producing hydrogen iodide.SOLUTION: The process includes providing a vapor-phase reactant stream comprising hydrogen and iodine and reacting the reactant stream in the presence of a catalyst to produce a product stream comprising hydrogen iodide. The catalyst includes at least one selected from the group of nickel, cobalt, iron, nickel oxide, cobalt oxide, and iron oxide. The catalyst is supported on a support.SELECTED DRAWING: Figure 1