CN115138380B - Preparation method and application of covalent organic framework supported copper catalyst for hydrochlorination of acetylene - Google Patents

Preparation method and application of covalent organic framework supported copper catalyst for hydrochlorination of acetylene Download PDF

Info

Publication number
CN115138380B
CN115138380B CN202210337297.5A CN202210337297A CN115138380B CN 115138380 B CN115138380 B CN 115138380B CN 202210337297 A CN202210337297 A CN 202210337297A CN 115138380 B CN115138380 B CN 115138380B
Authority
CN
China
Prior art keywords
cofs
catalyst
acetylene
preparation
reaction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210337297.5A
Other languages
Chinese (zh)
Other versions
CN115138380A (en
Inventor
赵佳
冯涛
金春晓
王涛
蔡海婷
李小年
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University of Technology ZJUT
Original Assignee
Zhejiang University of Technology ZJUT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang University of Technology ZJUT filed Critical Zhejiang University of Technology ZJUT
Priority to CN202210337297.5A priority Critical patent/CN115138380B/en
Publication of CN115138380A publication Critical patent/CN115138380A/en
Application granted granted Critical
Publication of CN115138380B publication Critical patent/CN115138380B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/14—Phosphorus; Compounds thereof
    • B01J27/16—Phosphorus; Compounds thereof containing oxygen, i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr
    • B01J27/18—Phosphorus; Compounds thereof containing oxygen, i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr with metals other than Al or Zr
    • B01J27/1802—Salts or mixtures of anhydrides with compounds of other metals than V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, e.g. phosphates, thiophosphates
    • B01J27/1817—Salts or mixtures of anhydrides with compounds of other metals than V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, e.g. phosphates, thiophosphates with copper, silver or gold
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/14—Phosphorus; Compounds thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/18—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms
    • B01J31/1845—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms the ligands containing phosphorus
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/07—Preparation of halogenated hydrocarbons by addition of hydrogen halides
    • C07C17/08—Preparation of halogenated hydrocarbons by addition of hydrogen halides to unsaturated hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2231/00—Catalytic reactions performed with catalysts classified in B01J31/00
    • B01J2231/30—Addition reactions at carbon centres, i.e. to either C-C or C-X multiple bonds
    • B01J2231/32—Addition reactions to C=C or C-C triple bonds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/584—Recycling of catalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)

Abstract

The invention discloses a preparation method and application of a Cu/COFs catalyst for acetylene hydrochlorination. The preparation method comprises the following specific steps: (1) preparing a covalent organic framework; (2) preparing a P-doped COFs carrier material; (3) preparation of Cu-COFs catalyst: dissolving a cupric precursor in a solvent to prepare an active component solution; and (3) loading a cupric precursor onto the P-doped COFs carrier material prepared in the step (2) by a solution impregnation method, carrying out vacuum drying treatment, and then adopting a glow discharge method to improve the dispersion of Cu active components and inhibit agglomeration of the Cu active components, thereby finally obtaining the Cu/COFs catalyst. The invention provides an application of the Cu-COFs catalyst prepared by the preparation method in the reaction of synthesizing chloroethylene by hydrochlorination of acetylene. The Cu-COFs catalyst prepared by the method is applied to acetylene hydrochlorination, can realize high conversion rate and high selectivity to the acetylene hydrochlorination, has good stability, and has good economic applicability and industrial application value.

Description

Preparation method and application of covalent organic framework supported copper catalyst for hydrochlorination of acetylene
Field of the art
The invention belongs to the technical field of catalysts, and particularly relates to a preparation method and application of a supported copper-based covalent organic frameworks (Cu-COFs) catalyst for acetylene hydrochlorination.
(II) background art
Polyvinyl chloride (PVC) is a versatile plastic used in a wide range of applications and is polymerized from Vinyl Chloride Monomer (VCM). With the increasing demand of China for polyvinyl chloride, the production of vinyl chloride monomer is also increasing year by year. At present, the main methods for producing vinyl chloride in the world are as follows: acetylene hydrochlorination (calcium carbide acetylene process), ethylene oxychlorination and ethane oxychlorination. Based on the current situation of rich coal, lean oil and gas deficiency in China, most enterprises in China mainly use an acetylene hydrochlorination method to produce VCM. However, the method adopts the mercury chloride catalyst as the catalyst, wherein mercury chloride is easy to volatilize and sublimate at the reaction temperature, so that the mercury chloride is greatly lost from the catalyst, the service life of the catalyst is greatly reduced, and the production is not facilitated. And because of the highly toxic nature of mercury chloride, it was prescribed in the "water for mercury convention" that mercury was prohibited from being used in the production of polyvinyl chloride (PVC) since 2020. How to solve the pollution problem caused by mercury catalysts is an urgent problem to be solved in the whole industry of producing vinyl chloride by a calcium carbide method.
In the aspect of metal active components, the non-mercury catalyst which is mature in industry at present is mainly noble metal catalyst such as gold, palladium, ruthenium and the like, and although the reaction activity has certain advantages, the non-mercury catalyst is difficult to regenerate after being deactivated and the high price brings great cost pressure to the industrialized production of chloroethylene, is limited by the problems of cost and the like, and has no report of large-scale application so far. Therefore, development of a non-noble metal catalyst typified by a copper-based catalyst is imperative. Non-noble metal catalysts have the advantage of relatively low price, but have a great difference in activity and stability from noble metal catalysts, and further optimization development is required.
In the aspect of catalyst carriers, most acetylene hydrochlorination catalysts are prepared by taking active carbon as a carrier, and the active carbon has low mechanical strength and poor regeneration performance. For this purpose, researchers have used molecular sieves, metal oxides, metal-organic framework compounds or Covalent Organic Frameworks (COFs) as carriers.
Wherein Covalent Organic Frameworks (COFs) are a class of organic porous polymers with periodicity and crystallinity, whose organic building blocks are linked by covalent bonds to form porous crystalline covalent organic framework materials with periodicity. Because covalent organic framework materials are linked by strong covalent bonds from light elements (H, B, C, N, O, etc.), they have many unique properties such as rigid structures (two-or three-dimensional), lower density, high thermal stability, and permanent pores with large specific surface areas, which make them widely used in research fields of gas adsorption, heterogeneous catalysis, photoconduction, and energy storage. Meanwhile, a thought is provided for the development of the carrier in the hydrochlorination of acetylene.
In the research at home and abroad, the mercury-free catalyst disclosed in patent CN201010248348.4 takes a molecular sieve such as MCM-41 as a carrier and noble metal ruthenium trichloride as an active component. The mercury-free catalyst disclosed in patent CN201110257696.2 takes HZSM-5 type, naZSM-5 type, mordenite, H beta type and HY type molecular sieves as carriers, and halides and complexes of noble metal palladium as active components. The mercury-free catalyst disclosed in patent CN201310124706.4 takes molecular sieve, silicon dioxide or alumina as a carrier, pt and Cu as main active components, and alkaline earth metal as auxiliary agents. The mercury-free catalyst disclosed in patent CN201910221548.1 uses a metal-organic framework material with pyridine nitrogen as a carrier, and pyridine nitrogen and copper ions as active components.
Patent CN201110040369.1 reports that activated carbon is used as a carrier and Cu is used as a carrier 2 P-CuCl 2 The mercury-free catalyst is prepared by preparing copper chloride and hypophosphite into solution by deionized water at room temperature, immersing the solution into an active carbon carrier, and drying and roasting the solution to prepare the copper-based catalyst, wherein the catalyst is used for acetylene hydrochlorination, the acetylene conversion rate is only 64% and the vinyl chloride selectivity is 53% at 170 ℃. The problem of lower activity and selectivity is not solved.
Patent CN201711154986.8 reports that FAU type silicon-aluminum molecular sieve is taken as a carrier, and the active component is CuCl 2 . Dissolving copper chloride with deionized water or absolute ethyl alcohol; dipping the copper chloride solution on the molecular sieve according to the calculated proportion; and then placing the prepared catalyst in a baking oven at 100-150 ℃ for baking to obtain the catalyst. However, the stannous chloride is easy to volatilize and lose in the reaction process, so that the stability of the catalyst is not goodStrong, can not reach the industrialization requirement.
In summary, the activity and stability of the mercury-free catalyst applied to the hydrochlorination of acetylene still hardly meet the industrial requirements. Although the method of adding metal auxiliary agent, stabilizer, adopting ionic liquid as impregnating solution and the like can improve the activity, the problem of stability is difficult to solve. In addition, most of acetylene hydrochlorination catalysts are prepared by using active carbon as a carrier, and the active carbon has low mechanical strength and poor regeneration performance. The catalyst can be caused to collapse and sinter in the long-term use process, so that the catalyst is lost and the environment is seriously polluted. Therefore, it would be of great industrial application to develop an inexpensive, efficient, durable and environmentally friendly nonmetallic catalyst to replace the existing acetylene hydrochlorination catalyst.
(III) summary of the invention
The first aim of the invention is to solve the problems of poor acetylene conversion rate and poor catalyst stability of the copper catalyst in the hydrochlorination of acetylene, and provide a preparation method of the Cu/COFs catalyst.
The second purpose of the invention is to provide the application of the Cu/COFs catalyst in the reaction of synthesizing vinyl chloride by hydrochlorination of acetylene, and the Cu/COFs catalyst has good catalytic activity and stability.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
in a first aspect, the invention provides a preparation method of a Cu/COFs catalyst for hydrochlorination of acetylene, which comprises the following specific steps:
(1) Preparation of Covalent Organic Frameworks (COFs): firstly, stirring an amino compound, a carbonyl compound and a nonaqueous organic solvent for 3-6 hours at 20-30 ℃; then adding the mixture into a heat-resistant glass tube (Pyrex), freezing the mixture by using liquid nitrogen, vacuumizing the mixture, thawing the mixture again, and repeating the freezing-vacuumizing-thawing operation to sufficiently remove oxygen in the system; sealing the heat-resistant glass tube by using a flame spray gun, placing the sealed heat-resistant glass tube in a constant-temperature oven, controlling the temperature to be 100-200 ℃ for reaction for 1-9 days, and washing and drying the obtained reactant to obtain a Covalent Organic Frameworks (COFs) product; the amino compound is at least one of diphenyl diamine, o-phenylenediamine, 3-nitro-o-phenylenediamine, 3, 5-dimethyl-1, 2-phenylenediamine and 2,4, 6-trimethyl-1, 3-phenylenediamine; the carbonyl compound is at least one of 4,4' -biphenyl dicarboxaldehyde, terephthalaldehyde, phthalic dicarboxaldehyde, trimesic aldehyde and trialdehyde phloroglucinol;
(2) Preparing a P-doped COFs carrier material: immersing the covalent organic framework product prepared in the step (1) in a phosphorus source solution for 12-36h at room temperature, taking out and drying, and roasting for 4-6h at 300-500 ℃ in nitrogen atmosphere to obtain a P-doped covalent organic framework carrier material; the P doping can coordinate with copper to improve the activity and stability of the catalyst;
(3) Preparation of Cu-COFs catalyst: dissolving a cupric precursor in a solvent to prepare an active component solution; and (3) loading a cupric precursor onto the P-doped COFs carrier material prepared in the step (2) by a solution impregnation method, carrying out vacuum drying treatment, and then adopting a glow discharge method to improve the dispersion of Cu active components and inhibit agglomeration of the Cu active components, thereby finally obtaining the Cu/COFs catalyst.
Preferably, in step (1), the molar ratio of amino compound to carbonyl compound is 1:1-1:3, a step of; further preferably 1:1.
preferably, in the step (1), the nonaqueous organic solvent is at least one of ethanol, methanol and acetonitrile; methanol is more preferable.
Preferably, in the step (1), the stirring temperature is 25 ℃; the stirring time is 4-6h, most preferably 5h.
Preferably, in step (1), the reaction temperature is controlled to be 100 to 200 ℃, more preferably 110 to 130 ℃, and most preferably 120 ℃.
Preferably, in step (1), the reaction time is controlled to be 1 to 9 days, more preferably 2 to 4 days, and most preferably 3 days.
Preferably, in the step (1), the washing reagent is a mixed solvent of anhydrous N, N-dimethylacetamide and anhydrous acetone, and more preferably, the volume ratio of anhydrous N, N-dimethylacetamide to anhydrous acetone is 1:1.
preferably, in the step (2), the phosphorus source is phosphoric acid or sodium hypophosphite monohydrate, the solvent of the phosphorus source solution is deionized water, the volume concentration of the phosphoric acid solution is 60% -90%, and the molar concentration of the aqueous solution of sodium hypophosphite monohydrate is 0.9-4.8mol/L.
Preferably, in the step (2), the room temperature immersion time is 18 to 30 hours.
Preferably, in the step (2), the drying condition is: the drying temperature is 120-300 ℃, more preferably 120-180 ℃; the drying time is 4-12 hours.
Preferably, in the step (2), the baking temperature is 400 ℃ and the baking time is 4 hours.
Preferably, in the step (3), the copper loading (mass percent relative to the carrier) in the Cu/COF catalyst is controlled to be 0.2 to 10wt%.
Preferably, in step (3), the cupric-containing precursor is selected from Cu (BF 4 ) 2 、Cu(NO 3 ) 2 、Cu(C 5 H 7 O 2 ) 2 、CuSO 4 Or CuCl 2 One of them. Preferably, the solvent is one or more of deionized water, absolute ethyl alcohol, tetrahydrofuran, methanol, acetone, diethyl ether, cyclohexane, carbon tetrachloride and benzene. Preferably, the concentration of the active component solution is 0.0625-3.125mol/L.
Preferably, in the step (3), the solution impregnation method is a solution impregnation method, specifically: after the active component solution and the carrier are mixed, stirring is carried out for 1-2h, and supernatant liquid is removed by centrifugation, so that the precursor containing bivalent copper is loaded on the carrier. The impregnation method is a well-known technology in the field, namely, the dripped impregnation liquid is matched with the pore volume of the porous solid carrier, and the dripped impregnation liquid completely enters the pore canal of the porous solid carrier.
Preferably, in the step (3), the vacuum drying treatment conditions are: the temperature is 120-300 ℃ and the time is 8-12 hours.
Preferably, in the step (3), the glow discharge plasma treatment conditions are as follows: the system is kept in a vacuum state by using a vacuum pump with the power of 250-500W, the pressure of a plasma chamber is kept at 100Pa by adjusting the air flow, the plasma treatment intensity is adjusted by adjusting the discharge voltage value, the applied voltage is 80-300V, and the treatment time is 0.5-2 h.
In a second aspect, the invention provides the use of the Cu-COFs catalyst in the hydrochlorination of acetylene to vinyl chloride.
The application is specifically as follows: filling the Cu/COFs catalyst into a fixed bed reactor, and introducing raw material gases of HCl and C 2 H 2 The reaction temperature is 120-200 ℃, the reaction pressure is 0.01-2 MPa, and the chloroethylene is obtained by reaction.
Preferably, the ratio of the raw material gas materials is n (HCl) to n (C) 2 H 2 ) The acetylene volume space velocity is 5-500 h, which is 1:1-1.2:1 -1 。
Compared with the prior art, the invention has the following innovation points and technical advantages:
(1) The invention uses covalent organic framework material COFs to replace traditional active carbon as catalyst carrier to prepare Cu catalyst, and the catalyst is applied to acetylene hydrochlorination reaction to improve catalytic activity and stability. Along with the gradual maturation of the preparation technology of the COFs material, the cost is gradually reduced, and the preparation method has a very strong industrial application prospect.
(2) The invention adopts glow discharge plasma technology to replace traditional roasting treatment, greatly enhances the dispersibility of copper, is beneficial to reducing agglomeration, enables more active sites to be exposed on the inner and outer surfaces of the catalyst, exerts higher activity and can keep stability in the long-time reaction process.
(3) The invention carries out P doping on the COFs carrier and coordinates with Cu further, thereby enhancing the activity and stability of the Cu-based catalyst; and the dispersion of Cu active components and the resistance to carbon deposition can be increased.
(4) The Cu-COFs catalyst prepared by the method is applied to acetylene hydrochlorination, can realize high conversion rate and high selectivity to the acetylene hydrochlorination, has good stability, and has good economic applicability and industrial application value.
(IV) detailed description of the invention
The invention is illustrated below by means of specific examples. It is to be noted that the examples are only for further explanation of the present invention and are not to be construed as limiting the scope of the present invention in any way. Those skilled in the art will be able to make numerous insubstantial modifications and adaptations in light of the above disclosure.
Example 1
(1) Synthesis of covalent organic frameworks: first, the molar ratio is 1:1, 0.0367mol of 3, 5-dimethyl-1, 2-phenylenediamine, 0.0367mol of 4,4' -biphenyl dicarboxaldehyde and 30mL of methanol solvent are mixed, stirred at 25 ℃ for 5 hours, and then the mixture is added into a heat-resistant glass tube (Pyrex), frozen using liquid nitrogen, evacuated and thawed. Repeating the operations of freezing, vacuumizing and thawing for three times to remove oxygen in the system, sealing a Pyrex tube by using a flame spray gun, placing the sealed Pyrex tube in a constant-temperature oven at 120 ℃, reacting for 3 days, washing the obtained reactant for 1h by using a mixed solvent (volume ratio of 1:1) of anhydrous N, N-Dimethylacetamide (DMAC) and anhydrous acetone, and vacuum-drying at 80 ℃ for 4h to obtain the covalent organic framework product (COFs). Immersing the COFs in 35mL of phosphoric acid solution with the volume concentration of 85% for 24 hours at room temperature, drying the COFs in a constant-temperature oven at 150 ℃ for 8 hours until the COFs are dried, and roasting the COFs in a nitrogen atmosphere at 400 ℃ for 4 hours to obtain the P-doped COFs carrier material.
(2) Preparation of Cu-COFs catalyst: 10g of the P-doped COFs carrier material obtained in the step (1) is taken and added into a container. Then 20mL of Cu (BF) having a molar concentration of 0.1664mol/L was added 4 ) 2 Stirring for 2 hours, centrifuging, removing supernatant, vacuum drying for 10 hours at 120 ℃, then carrying out glow discharge treatment, using a vacuum pump with power of 250-500W to keep the system in a vacuum state, keeping the pressure of a plasma chamber at 100Pa by adjusting air flow, adjusting the plasma treatment intensity by adjusting discharge voltage value, applying voltage of 80V, and treating for 1.5 hours, thus obtaining the COFs catalyst with Cu (II) loading of 2.13 wt%.
(3) The test shows that the catalyst is applied to acetylene hydrochlorination in a fixed bed reactor, and the reaction conditions are as follows: at 150 DEG CThe reaction pressure is 0.01MPa, n (HCl) n (C) 2 H 2 ) =1:1, acetylene space velocity 30h -1 . In the initial stage of the reaction, the conversion rate of acetylene is 99.32%, and the selectivity of chloroethylene is 100%; after 500 hours of reaction, the conversion of acetylene was 99.08%, and the selectivity of vinyl chloride was 99.82%.
Example 2
(1) As in example 1. ( The molar ratio of the reactants is 1:1, 3-nitroo-phenylenediamine, 4' -biphenyl dicarboxaldehyde )
(2) Preparation of Cu-COFs catalyst: 10g of the P-doped COFs carrier material obtained in the step (1) is taken and added into a container. Then 20mL of Cu with the molar concentration of 0.2055mol/L is added 2 P 2 O 7 Stirring for 2 hours, centrifuging, removing supernatant, vacuum drying for 10 hours at 120 ℃, then carrying out glow discharge treatment, using a vacuum pump with power of 250-500W to keep the system in a vacuum state, keeping the pressure of a plasma chamber at 100Pa by adjusting air flow, adjusting the plasma treatment intensity by adjusting discharge voltage value, applying 100V, and treating for 1.5 hours, thus obtaining the COFs catalyst with Cu (II) load of 5.26 wt%.
(3) The test shows that the catalyst is applied to acetylene hydrochlorination in a fixed bed reactor, and the reaction conditions are as follows: the temperature is 150 ℃, the reaction pressure is 0.01MPa, n (HCl) is n (C) 2 H 2 ) =1:1, acetylene space velocity 30h -1 . In the initial stage of the reaction, the conversion rate of acetylene is 99.61 percent, and the selectivity of chloroethylene is 100 percent; after 500 hours of reaction, the conversion of acetylene was 99.13% and the selectivity to vinyl chloride was 99.44%.
Example 3
(1) As in example 1. ( The molar ratio of the reactants is 1:1, 4' -biphenyldicarboxaldehyde )
(2) Preparation of Cu-COFs catalyst: 10g of the P-doped COFs carrier material obtained in the step (1) is taken and added into a container. Then 20mL of Cu with the molar concentration of 0.1182mol/L is added 3 (PO 4 ) 2 Stirring for 2 hr, centrifuging, removing supernatant, vacuum drying at 120deg.C for 10 hr, and glow discharge treating with 250-500W vacuum pumpIn the vacuum state, the pressure of the plasma chamber was maintained at 100Pa by adjusting the air flow rate, the plasma treatment intensity was adjusted by adjusting the discharge voltage value, the applied voltage was 120V, and the treatment time was 1.5h. Thus, a COFs catalyst having a Cu (II) loading of 4.54wt% was obtained.
(3) The test shows that the catalyst is applied to acetylene hydrochlorination in a fixed bed reactor, and the reaction conditions are as follows: the temperature is 150 ℃, the reaction pressure is 0.01MPa, n (HCl) is n (C) 2 H 2 ) =1:1, acetylene space velocity 30h -1 . In the initial stage of the reaction, the conversion rate of acetylene is 99.54%, and the selectivity of chloroethylene is 100%; after 500 hours of reaction, the conversion of acetylene was 99.22% and the selectivity to vinyl chloride was 99.51%.
Example 4
(1) As in example 1. ( The molar ratio of the reactants is 1:1, 2,4, 6-trimethyl-1, 3-phenylenediamine, 4' -biphenyldicarboxaldehyde )
(2) Preparation of Cu-COFs catalyst: 10g of the P-doped COFs carrier material obtained in the step (1) is taken and added into a container. Then 20mL of CuCl with the molar concentration of 0.2508mol/L is added 2 Stirring for 2 hours, centrifuging, removing supernatant, vacuum drying at 120deg.C for 10 hours, then glow discharge treating, maintaining the vacuum state of the system by using a vacuum pump with power of 250-500W, maintaining the pressure of the plasma chamber at 100Pa by adjusting air flow, adjusting the plasma treatment intensity by adjusting discharge voltage value, and applying voltage of 140V for 1.5 hours. Thus, a COFs catalyst having a Cu (II) loading of 3.21wt% was obtained.
(3) The test shows that the catalyst is applied to acetylene hydrochlorination in a fixed bed reactor, and the reaction conditions are as follows: the temperature is 150 ℃, the reaction pressure is 0.01MPa, n (HCl) is n (C) 2 H 2 ) =1:1, acetylene space velocity 30h -1 . In the initial stage of the reaction, the conversion rate of acetylene is 99.68 percent, and the selectivity of chloroethylene is 100 percent; after 500 hours of reaction, the conversion of acetylene was 99.40% and the selectivity to vinyl chloride was 99.27%.
Example 5
(1) As in example 1. ( The molar ratio of the reactants is 1:1, 4' -biphenyldicarboxaldehyde )
(2) Preparation of Cu-COFs catalyst: 10g of the P-doped COFs carrier material obtained in the step (1) is taken and added into a container. Then 20mL of Cu (BF) having a molar concentration of 0.2375mol/L was added 4 ) 2 Stirring for 2 hours, centrifuging, removing supernatant, vacuum drying at 120deg.C for 10 hours, then glow discharge treating, maintaining the vacuum state of the system by using a vacuum pump with power of 250-500W, maintaining the pressure of the plasma chamber at 100Pa by adjusting air flow, adjusting the plasma treatment intensity by adjusting discharge voltage value, and applying 160V for 1.5 hours. Thus, a COFs catalyst having a Cu (II) loading of 3.04wt% was obtained.
(3) The test shows that the catalyst is applied to acetylene hydrochlorination in a fixed bed reactor, and the reaction conditions are as follows: the temperature is 150 ℃, the reaction pressure is 0.01MPa, n (HCl) is n (C) 2 H 2 ) =1:1, acetylene space velocity 30h -1 . In the initial stage of the reaction, the conversion rate of acetylene is 99.43 percent, and the selectivity of chloroethylene is 100 percent; after 500 hours of reaction, the conversion of acetylene was 99.19% and the selectivity to vinyl chloride was 99.21%.
Example 6
(1) As in example 1. ( The molar ratio of the reactants is 1:1 o-phenylenediamine, terephthalaldehyde )
(2) Preparation of Cu-COFs catalyst: 10g of the P-doped COFs carrier material obtained in the step (1) is taken and added into a container. Then 20mL of Cu (BF) having a molar concentration of 0.1664mol/L was added 4 ) 2 Stirring for 2 hours, centrifuging, removing supernatant, vacuum drying at 120deg.C for 10 hours, then glow discharge treating, maintaining the system in vacuum state with a vacuum pump with power of 250-500W, maintaining the pressure of the plasma chamber at 100Pa by adjusting air flow, adjusting the plasma treatment intensity by adjusting discharge voltage value, applying voltage of 180V, and treating time of 1.5 hours. Thus, a COFs catalyst having a Cu (II) loading of 2.13wt% was obtained.
(3) The test shows that the catalyst is applied to acetylene hydrochlorination in a fixed bed reactor, and the reaction conditions are as follows: the temperature is 150 ℃, the reaction pressure is 0.01MPa, n (HCl) is n (C) 2 H 2 ) =1:1, acetylene space velocity 30h -1 . In the initial stage of the reaction, the conversion rate of acetylene is 99.22 percent, and the selectivity of chloroethylene is 100 percent; after 500 hours of reaction, the conversion of acetylene was 98.89% and the selectivity to vinyl chloride was 99.14%.
Example 7
(1) As in example 1. ( The molar ratio of the reactants is 1:1 o-phenylenediamine, o-phthalaldehyde )
(2) Preparation of Cu-COFs catalyst: 10g of the P-doped COFs carrier material obtained in the step (1) is taken and added into a container. Then 20mL of Cu with the molar concentration of 0.2055mol/L is added 2 P 2 O 7 Stirring for 2 hours, centrifuging, removing supernatant, vacuum drying at 120deg.C for 10 hours, then glow discharge treating, maintaining the vacuum state of the system by using a vacuum pump with power of 250-500W, maintaining the pressure of the plasma chamber at 100Pa by adjusting air flow, adjusting the plasma treatment intensity by adjusting discharge voltage value, applying voltage of 200V, and treating for 1.5 hours. Thus, a COFs catalyst having a Cu (II) loading of 5.26wt% was obtained.
(3) The test shows that the catalyst is applied to acetylene hydrochlorination in a fixed bed reactor, and the reaction conditions are as follows: the temperature is 150 ℃, the reaction pressure is 0.01MPa, n (HCl) is n (C) 2 H 2 ) =1:1, acetylene space velocity 30h -1 . In the initial stage of the reaction, the conversion rate of acetylene is 99.38%, and the selectivity of chloroethylene is 100%; after 500 hours of reaction, the conversion of acetylene was 99.24% and the selectivity to vinyl chloride was 99.38%.
Example 8
(1) As in example 1. ( The molar ratio of the reactants is 1:1 o-phenylenediamine, trimesic aldehyde )
(2) Preparation of Cu-COFs catalyst: 10g of the P-doped COFs carrier material obtained in the step (1) is taken and added into a container. Then 20mL of Cu with the molar concentration of 0.1182mol/L is added 3 (PO 4 ) 2 Stirring for 2 hr, centrifuging, removing supernatant, vacuum drying at 120deg.C for 10 hr, glow discharge treating, maintaining the vacuum state with 250-500W vacuum pump, and regulating air flow to maintain the pressure of the plasma chamber100Pa, the plasma treatment intensity was adjusted by adjusting the discharge voltage value, the applied voltage was 180V, and the treatment time was 1.5 hours. Thus, a COFs catalyst having a Cu (II) loading of 4.54wt% was obtained.
(3) The test shows that the catalyst is applied to acetylene hydrochlorination in a fixed bed reactor, and the reaction conditions are as follows: the temperature is 150 ℃, the reaction pressure is 0.01MPa, n (HCl) is n (C) 2 H 2 ) =1:1, acetylene space velocity 30h -1 . In the initial stage of the reaction, the conversion rate of acetylene is 99.71 percent, and the selectivity of chloroethylene is 100 percent; after 500 hours of reaction, the conversion of acetylene was 99.47% and the selectivity to vinyl chloride was 99.79%.
Example 9
(1) As in example 1. ( The molar ratio of the reactants is 1:1 o-phenylenediamine, trialdehyde phloroglucinol )
(2) Preparation of Cu-COFs catalyst: 10g of the P-doped COFs carrier material obtained in the step (1) is taken and added into a container. Then 20mL of CuCl with the molar concentration of 0.2508mol/L is added 2 Stirring for 2 hours, centrifuging, removing supernatant, vacuum drying at 120deg.C for 10 hours, then glow discharge treating, maintaining the vacuum state of the system by using a vacuum pump with power of 250-500W, maintaining the pressure of the plasma chamber at 100Pa by adjusting air flow, adjusting the plasma treatment intensity by adjusting discharge voltage value, applying voltage of 180V, and treating for 1.5 hours. Thus, a COFs catalyst having a Cu (II) loading of 3.21wt% was obtained.
(3) The test shows that the catalyst is applied to acetylene hydrochlorination in a fixed bed reactor, and the reaction conditions are as follows: the temperature is 150 ℃, the reaction pressure is 0.01MPa, n (HCl) is n (C) 2 H 2 ) =1:1, acetylene space velocity 30h -1 . In the initial stage of the reaction, the conversion rate of acetylene is 99.57 percent, and the selectivity of chloroethylene is 100 percent; after 500 hours of reaction, the conversion of acetylene was 99.28% and the selectivity to vinyl chloride was 99.72%.
Example 10
(1) As in example 1. ( The molar ratio of the reactants is 1:1, 2,4, 6-trimethyl-1, 3-phenylenediamine, trialdehyde phloroglucinol )
(2) Preparation of Cu-COFs catalyst: step (1) of taking 10gThe resulting P-doped COFs support material is added to a container. Then 20mL of Cu (BF) having a molar concentration of 0.2375mol/L was added 4 ) 2 Stirring for 2 hours, centrifuging, removing supernatant, vacuum drying at 120deg.C for 10 hours, then glow discharge treating, maintaining the vacuum state of the system by using a vacuum pump with power of 250-500W, maintaining the pressure of the plasma chamber at 100Pa by adjusting air flow, adjusting the plasma treatment intensity by adjusting discharge voltage value, and applying voltage of 150V for 1.5 hours. Thus, a COFs catalyst having a Cu (II) loading of 3.04wt% was obtained.
(3) The test shows that the catalyst is applied to acetylene hydrochlorination in a fixed bed reactor, and the reaction conditions are as follows: the temperature is 120 ℃, the reaction pressure is 0.01MPa, n (HCl) is n (C) 2 H 2 ) =1:1, acetylene space velocity 30h -1 . In the initial stage of the reaction, the conversion rate of acetylene is 99.03 percent, and the selectivity of chloroethylene is 100 percent; after 500 hours of reaction, the conversion of acetylene was 98.46% and the selectivity to vinyl chloride was 99.23%.
Comparative example 1
Comparative example 1 is a comparison with example 1 to demonstrate the superiority of covalent organic framework support materials in catalytic stability.
(1) 10g of commercial specific surface area 500-1500 m 2 Adding/g spherical active carbon with pore volume of 0.25-1.5 mL/g into the container. Then 20mL of Cu (BF) having a molar concentration of 0.1664mol/L was added 4 ) 2 Stirring for 2 hours, centrifuging, removing supernatant, vacuum drying for 10 hours at 120 ℃, then carrying out glow discharge treatment, using a vacuum pump with the power of 250-500W to keep the system in a vacuum state, keeping the pressure of a plasma chamber at 100Pa by adjusting the air flow, adjusting the plasma treatment intensity by adjusting the discharge voltage value, applying the voltage of 80V, and carrying out treatment for 1.5 hours, thus obtaining the copper-based catalyst with the Cu (II) loading of 2.13 wt%.
(2) The test shows that the catalyst is applied to acetylene hydrochlorination in a fixed bed reactor, and the reaction conditions are as follows: the temperature is 150 ℃, the reaction pressure is 0.01MPa, n (HCl) is n (C) 2 H 2 ) =1:1, acetylene space velocity 30h -1 . In the initial stage of the reaction, the conversion rate of acetylene is 78.56 percent, and the selectivity of chloroethylene is 93.61 percent; after 500 hours of reaction, the conversion of acetylene was 45.33% and the selectivity to vinyl chloride was 87.64%.
Comparative example 2
Comparative example 2 is a comparison with example 2 to demonstrate the superiority of the covalent organic framework support material in terms of catalytic stability.
(1) 10g of commercially available specific surface area of 1000-3000m 2 Adding/g active carbon fiber with the aperture of 1.0-4.0nm into a container. Then 20mL of Cu with the molar concentration of 0.2055mol/L is added 2 P 2 O 7 Stirring for 2 hours, centrifuging, removing supernatant, vacuum drying for 10 hours at 120 ℃, then carrying out glow discharge treatment, using a vacuum pump with the power of 250-500W to keep the system in a vacuum state, keeping the pressure of a plasma chamber at 100Pa by adjusting the air flow, adjusting the plasma treatment intensity by adjusting the discharge voltage value, applying the voltage of 100V, and carrying out treatment for 1.5 hours, thus obtaining the copper-based catalyst with the Cu (II) loading of 5.26 wt%.
(2) The test shows that the catalyst is applied to acetylene hydrochlorination in a fixed bed reactor, and the reaction conditions are as follows: the temperature is 150 ℃, the reaction pressure is 0.01MPa, n (HCl) is n (C) 2 H 2 ) =1:1, acetylene space velocity 30h -1 . In the initial stage of the reaction, the conversion rate of acetylene is 76.39%, and the selectivity of chloroethylene is 91.62%; after 500 hours of reaction, the conversion of acetylene was 42.28% and the selectivity to vinyl chloride was 84.87%.
Comparative example 3
Comparative example 3 is a comparison with example 3 to demonstrate the irreplaceability of the glow discharge plasma during catalyst preparation.
(1) As in example 1. ( The molar ratio of the reactants is 1:1, 4' -biphenyldicarboxaldehyde )
(2) Preparation of Cu-COFs catalyst: 10g of the P-doped COFs carrier material obtained in the step (1) is taken and added into a container. Then 20mL of Cu with the molar concentration of 0.1182mol/L is added 3 (PO 4 ) 2 Is stirred in the ethanol solution of (2)And centrifuging for 2 hours, removing the supernatant, and vacuum drying at 120 ℃ for 10 hours to obtain the COFs catalyst with the Cu (II) loading capacity of 4.54 weight percent.
(3) The test shows that the catalyst is applied to acetylene hydrochlorination in a fixed bed reactor, and the reaction conditions are as follows: the temperature is 150 ℃, the reaction pressure is 0.01MPa, n (HCl) is n (C) 2 H 2 ) =1:1, acetylene space velocity 30h -1 . In the initial stage of the reaction, the conversion rate of acetylene is 80.66%, and the selectivity of chloroethylene is 94.74%; after 500 hours of reaction, the conversion of acetylene was 61.54% and the selectivity to vinyl chloride was 88.49%.
Comparative example 4
Comparative example 4 illustrates the superiority of P doping in improving the activity and stability of Cu-based catalysts by comparison with example 4.
(1) As in example 1, COFs carriers were obtained without P-doping treatment. ( The molar ratio of the reactants is 1:1, 2,4, 6-trimethyl-1, 3-phenylenediamine, 4' -biphenyldicarboxaldehyde )
(2) Preparation of Cu-COFs catalyst: 10g of the P-doped COFs carrier material obtained in the step (1) is taken and added into a container. Then 20mL of CuCl with the molar concentration of 0.2508mol/L is added 2 Stirring for 2 hours, centrifuging, removing supernatant, vacuum drying at 120deg.C for 10 hours, then glow discharge treating, maintaining the vacuum state of the system by using a vacuum pump with power of 250-500W, maintaining the pressure of the plasma chamber at 100Pa by adjusting air flow, adjusting the plasma treatment intensity by adjusting discharge voltage value, and applying voltage of 140V for 1.5 hours. Thus, a COFs catalyst having a Cu (II) loading of 3.21wt% was obtained.
(3) The test shows that the catalyst is applied to acetylene hydrochlorination in a fixed bed reactor, and the reaction conditions are as follows: the temperature is 150 ℃, the reaction pressure is 0.01MPa, n (HCl) is n (C) 2 H 2 ) =1:1, acetylene space velocity 30h -1 . In the initial stage of the reaction, the conversion rate of acetylene is 81.52%, and the selectivity of chloroethylene is 91.63%; after 500 hours of reaction, the conversion of acetylene was 68.31% and the selectivity to vinyl chloride was 87.63%.
TABLE 1 evaluation of catalytic Performance of Cu-COF catalysts for hydrochlorination of acetylene

Claims (11)

1. A preparation method of a Cu/COFs catalyst for acetylene hydrochlorination reaction is characterized by comprising the following steps of: the preparation method comprises the following specific steps:
(1) Preparation of covalent organic frameworks: firstly, stirring an amino compound, a carbonyl compound and a nonaqueous organic solvent for 3-6 hours at 20-30 ℃; then adding the mixture into a heat-resistant glass tube, freezing the mixture by using liquid nitrogen, vacuumizing, thawing again, and repeating the freezing-vacuumizing-thawing operations to fully remove oxygen in the system; sealing the heat-resistant glass tube by using a flame spray gun, placing the sealed heat-resistant glass tube in a constant-temperature oven, controlling the temperature to be 100-200 ℃ and reacting for 1-9 days, and washing and drying the obtained reactant to obtain a covalent organic framework product; the amino compound is at least one of diphenyl diamine, o-phenylenediamine, 3-nitro-o-phenylenediamine, 3, 5-dimethyl-1, 2-phenylenediamine and 2,4, 6-trimethyl-1, 3-phenylenediamine; the carbonyl compound is at least one of 4,4' -biphenyl dicarboxaldehyde, terephthalaldehyde, phthalic dicarboxaldehyde, trimesic aldehyde and trialdehyde phloroglucinol;
(2) Preparing a P-doped COFs carrier material: immersing the covalent organic framework product prepared in the step (1) in a phosphorus source solution for 12-36h at room temperature, taking out and drying, and roasting for 4-6h at 300-500 ℃ in nitrogen atmosphere to obtain a P-doped covalent organic framework carrier material;
(3) Preparation of Cu-COFs catalyst: dissolving a cupric precursor selected from Cu (BF) in a solvent to obtain an active ingredient solution 4 ) 2 、Cu(NO 3 ) 2 、Cu(C 5 H 7 O 2 ) 2 Or CuSO 4 One of the following; by solution impregnationAnd (3) loading the precursor on the P-doped COFs carrier material prepared in the step (2), carrying out vacuum drying treatment, and adopting a glow discharge method to treat to improve the dispersion of Cu active components and inhibit agglomeration of the Cu active components, thereby finally obtaining the Cu/COFs catalyst.
2. The method of manufacturing according to claim 1, wherein: in step (1), the molar ratio of amino compound to carbonyl compound is 1:1-1:3.
3. the method of manufacturing according to claim 1, wherein: in the step (1), the non-aqueous organic solvent is at least one of ethanol, methanol and acetonitrile.
4. The method of manufacturing according to claim 1, wherein: in the step (1), the reaction temperature is controlled to be 110-130 ℃; the reaction time is controlled to be 2-4 days.
5. The method of manufacturing according to claim 1, wherein: in the step (1), the reaction temperature is controlled to be 120 ℃; the reaction time was controlled to 3 days.
6. The method of manufacturing according to claim 1, wherein: in the step (1), the washing reagent is a mixed solvent of anhydrous N, N-dimethylacetamide and anhydrous acetone.
7. The method of manufacturing according to claim 1, wherein: in the step (2), the phosphorus source is phosphoric acid or sodium hypophosphite monohydrate, the solvent of the phosphorus source solution is deionized water, the volume concentration of the phosphoric acid solution is 60% -90%, and the molar concentration of the aqueous solution of the sodium hypophosphite monohydrate is 0.9-4.8mol/L.
8. The method of manufacturing according to claim 1, wherein: in the step (2), the room temperature soaking time is 18-30h.
9. The method of manufacturing according to claim 1, wherein: in the step (3), the copper loading amount in the Cu/COF catalyst is controlled to be 0.2-10wt%.
10. The method of manufacturing according to claim 1, wherein: in the step (3), the glow discharge plasma treatment conditions are as follows: the system is kept in a vacuum state by using a vacuum pump with the power of 250-500W, the pressure of a plasma chamber is kept at 100Pa by adjusting the air flow, the plasma treatment intensity is adjusted by adjusting the discharge voltage value, the applied voltage is 80-300V, and the treatment time is 0.5-2 h.
11. The use of the Cu-COFs catalyst prepared by the preparation method according to claim 1 in the reaction of hydrochlorination of acetylene to synthesize vinyl chloride.
CN202210337297.5A 2022-03-31 2022-03-31 Preparation method and application of covalent organic framework supported copper catalyst for hydrochlorination of acetylene Active CN115138380B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210337297.5A CN115138380B (en) 2022-03-31 2022-03-31 Preparation method and application of covalent organic framework supported copper catalyst for hydrochlorination of acetylene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210337297.5A CN115138380B (en) 2022-03-31 2022-03-31 Preparation method and application of covalent organic framework supported copper catalyst for hydrochlorination of acetylene

Publications (2)

Publication Number Publication Date
CN115138380A CN115138380A (en) 2022-10-04
CN115138380B true CN115138380B (en) 2024-01-12

Family

ID=83405867

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210337297.5A Active CN115138380B (en) 2022-03-31 2022-03-31 Preparation method and application of covalent organic framework supported copper catalyst for hydrochlorination of acetylene

Country Status (1)

Country Link
CN (1) CN115138380B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103272619A (en) * 2013-06-07 2013-09-04 天津大学 Anion modified mercury-free catalyst for ethyne hydrochlorination reaction, and preparation method thereof
CN111097520A (en) * 2019-12-13 2020-05-05 中国科学院广州能源研究所 Covalent organic framework material loaded Pd catalyst and preparation method and application thereof
CN111744538A (en) * 2019-03-28 2020-10-09 新疆大学 Molecular sieve non-noble metal catalyst for hydrochlorination of acetylene
CN113210019A (en) * 2021-04-08 2021-08-06 浙江工业大学 Preparation method and application of Cu-MOF catalyst for acetylene hydrochlorination
CN113941344A (en) * 2021-09-30 2022-01-18 浙江工业大学 Phosphorus modified activated carbon and low-mercury catalyst prepared by taking phosphorus modified activated carbon as carrier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103272619A (en) * 2013-06-07 2013-09-04 天津大学 Anion modified mercury-free catalyst for ethyne hydrochlorination reaction, and preparation method thereof
CN111744538A (en) * 2019-03-28 2020-10-09 新疆大学 Molecular sieve non-noble metal catalyst for hydrochlorination of acetylene
CN111097520A (en) * 2019-12-13 2020-05-05 中国科学院广州能源研究所 Covalent organic framework material loaded Pd catalyst and preparation method and application thereof
CN113210019A (en) * 2021-04-08 2021-08-06 浙江工业大学 Preparation method and application of Cu-MOF catalyst for acetylene hydrochlorination
CN113941344A (en) * 2021-09-30 2022-01-18 浙江工业大学 Phosphorus modified activated carbon and low-mercury catalyst prepared by taking phosphorus modified activated carbon as carrier

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
2-Methyl-2-propanol as solvent for o-iodoxybenzoic acid (IBX) oxidation of 1 degrees alcohols to aldehydes;Scott A. Van Arman;《Tetrahedron Letters》;第50卷;全文 *
A practical one-pot synthesis of soluble hexa-peri-hexabenzocoronene and isolation of its cation-radical salt;Rajendra Rathore and Carrie L. Burns;《J. Org. Chem.》;第68卷;全文 *

Also Published As

Publication number Publication date
CN115138380A (en) 2022-10-04

Similar Documents

Publication Publication Date Title
CN107175125B (en) Activation method of MOFs base oxygen reduction electrocatalyst
CN113210019A (en) Preparation method and application of Cu-MOF catalyst for acetylene hydrochlorination
CN108262072B (en) Ruthenium complex catalyst for acetylene hydrochlorination and preparation method and application thereof
CN112642448B (en) Preparation method and application of copper catalyst for acetylene hydrochlorination
CN107185594B (en) Preparation method of Ni-Zn-K-Ru/MOF catalyst
CN111715268A (en) Catalyst with nitrogen-doped carbon material as carrier and preparation method thereof
CN111250170B (en) Nickel-based MOFs film photocatalyst growing on surface of foamed nickel in situ, and preparation method and application thereof
CN115138380B (en) Preparation method and application of covalent organic framework supported copper catalyst for hydrochlorination of acetylene
CN113713841B (en) Acetylene copper chloride-based catalyst and preparation method and application thereof
CN111744538A (en) Molecular sieve non-noble metal catalyst for hydrochlorination of acetylene
CN110655103A (en) Porous CuO/In2O3Dodecahedral complex and method for preparing same
CN111921543A (en) Preparation method and application of efficient acetylene hydrochlorination catalyst
CN113333004B (en) Preparation method and application of supported copper-based catalyst
CN115007214B (en) Copper-based metal organic framework catalyst prepared by mechanochemical method and preparation method
CN114749215B (en) MXene-based catalyst carrier for hydrochlorination of acetylene and preparation method and application of catalyst
CN116651505A (en) Ruthenium-based mercury-free catalyst for producing chloroethylene by calcium carbide method and preparation and use methods thereof
CN113145142B (en) Preparation method of tin-based catalyst and application of tin-based catalyst in acetylene hydration reaction
CN114733569B (en) Preparation method and application of covalent organic framework supported palladium catalyst for preparing ethylene by acetylene hydrogenation
CN110841637B (en) Fluorination catalyst precursor and method for producing fluorination catalyst
CN117839768A (en) Cu/HOF-Co catalyst for hydrochlorination of acetylene as well as preparation method and application thereof
CN115779968B (en) Copper-based catalyst for preparing vinyl chloride by hydrochlorination of acetylene as well as preparation method and application thereof
CN114425375B (en) Ni 12 P 5 TpPa-1-COF photocatalyst, preparation method thereof and application thereof in photocatalytic water splitting
CN115318312B (en) High-stability platinum-carbon catalyst and preparation method and application thereof
CN116037203A (en) Ruthenium catalyst of acetylene hydrochlorination loaded ionic liquid, preparation method and application
CN102430420B (en) Low-mercury composite catalyst for synthesizing chloroethylene, and preparation method for low-mercury composite catalyst

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant