CN115739134A - Method for preparing composite catalyst for vinyl chloride synthesis by using ruthenium trichloride waste - Google Patents
Method for preparing composite catalyst for vinyl chloride synthesis by using ruthenium trichloride waste Download PDFInfo
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- CN115739134A CN115739134A CN202211485096.6A CN202211485096A CN115739134A CN 115739134 A CN115739134 A CN 115739134A CN 202211485096 A CN202211485096 A CN 202211485096A CN 115739134 A CN115739134 A CN 115739134A
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- ruthenium trichloride
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- 239000003054 catalyst Substances 0.000 title claims abstract description 56
- YBCAZPLXEGKKFM-UHFFFAOYSA-K ruthenium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Ru+3] YBCAZPLXEGKKFM-UHFFFAOYSA-K 0.000 title claims abstract description 54
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002699 waste material Substances 0.000 title claims abstract description 27
- 239000002131 composite material Substances 0.000 title claims abstract description 20
- 230000015572 biosynthetic process Effects 0.000 title claims description 18
- 238000003786 synthesis reaction Methods 0.000 title claims description 18
- 230000002194 synthesizing effect Effects 0.000 claims abstract description 28
- HCJWWBBBSCXJMS-UHFFFAOYSA-J copper;dilithium;tetrachloride Chemical compound [Li+].[Li+].[Cl-].[Cl-].[Cl-].[Cl-].[Cu+2] HCJWWBBBSCXJMS-UHFFFAOYSA-J 0.000 claims abstract description 25
- 238000001238 wet grinding Methods 0.000 claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000002791 soaking Methods 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 239000004480 active ingredient Substances 0.000 claims abstract description 3
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 36
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 36
- 239000007789 gas Substances 0.000 claims description 8
- 238000004090 dissolution Methods 0.000 claims description 7
- 239000012495 reaction gas Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- IAWVHZJZHDSEOC-UHFFFAOYSA-N 3,3-dimethyl-2-oxobutanoic acid Chemical compound CC(C)(C)C(=O)C(O)=O IAWVHZJZHDSEOC-UHFFFAOYSA-N 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000002994 raw material Substances 0.000 abstract description 6
- 239000005997 Calcium carbide Substances 0.000 abstract description 3
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 17
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 17
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000006555 catalytic reaction Methods 0.000 description 7
- 229910052707 ruthenium Inorganic materials 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 239000012752 auxiliary agent Substances 0.000 description 6
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 5
- 229910052753 mercury Inorganic materials 0.000 description 5
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- -1 ruthenium ions Chemical class 0.000 description 2
- BIXNGBXQRRXPLM-UHFFFAOYSA-K ruthenium(3+);trichloride;hydrate Chemical group O.Cl[Ru](Cl)Cl BIXNGBXQRRXPLM-UHFFFAOYSA-K 0.000 description 2
- UDWZXMQIEHAAQT-UHFFFAOYSA-N 1,1-dichloro-3,3-dimethylbutan-2-one Chemical compound CC(C)(C)C(=O)C(Cl)Cl UDWZXMQIEHAAQT-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000001345 alkine derivatives Chemical class 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000007210 heterogeneous catalysis Methods 0.000 description 1
- 238000007172 homogeneous catalysis Methods 0.000 description 1
- 239000010799 household hazardous waste Substances 0.000 description 1
- 229960002523 mercuric chloride Drugs 0.000 description 1
- LWJROJCJINYWOX-UHFFFAOYSA-L mercury dichloride Chemical compound Cl[Hg]Cl LWJROJCJINYWOX-UHFFFAOYSA-L 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006276 transfer reaction Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
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- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a method for preparing a composite catalyst for synthesizing chloroethylene by utilizing ruthenium trichloride waste, which comprises the steps of taking waste ruthenium trichloride generated in the production of trimethylpyruvic acid as a main raw material, carrying out wet grinding and solid-liquid separation to obtain a solution containing ruthenium trichloride, adding dilithium tetrachlorocuprate into the solution, and adjusting the mass ratio of active ingredients ruthenium trichloride and dilithium tetrachlorocuprate in the solution to be 0.1-0.5:5-8, adding active carbon into the adjusted solution, soaking and drying to prepare the catalyst for synthesizing the vinyl chloride; the converter is used for synthesizing chloroethylene by the calcium carbide method. The method realizes the recycling of dangerous ruthenium trichloride waste.
Description
Technical Field
The invention relates to the technical field of three-waste treatment in metallurgy and chemical industry, in particular to a method for preparing a composite catalyst for synthesizing chloroethylene by utilizing a ruthenium trichloride waste catalyst generated in trimethylpyruvic acid production.
Background
Trimethylpyruvic acid is an important chemical raw material, and the synthesis process of trimethylpyruvic acid at present is to oxidize dichloropinacolone and sodium hypochlorite under the action of a catalyst to generate the trimethylpyruvic acid, so anhydrous ruthenium trichloride is required to be used for synthesizing the trimethylpyruvic acid and is repeatedly used until the anhydrous ruthenium trichloride loses catalytic activity after absorbing water and becomes waste ruthenium trichloride.
At present, most of the treatment of the waste ruthenium trichloride adopts a stockpiling mode, so that dangerous solid waste is formed and treated as dangerous waste disposal units with capital resources. Most of the technologies for recovering ruthenium trichloride by the domestic hazardous waste disposal units are alkali fusion methods, the energy consumption is high, the disposal quantity of salt-containing wastewater is large, and the cost is high.
The main component of the ruthenium trichloride catalyst which absorbs water and loses catalytic activity is ruthenium trichloride hydrate. The hydrated ruthenium trichloride is a good catalyst for heterogeneous catalysis or homogeneous catalysis reaction, and can be used for the process of synthesizing chloroethylene by a calcium carbide method.
At present, the synthesis process of chloroethylene by a calcium carbide method adopts two-stage synthesis of a foreground converter and a background converter. The foreground converter is high-concentration synthesis, namely: the HCl content of the gas inlet end is 50-50.5%, and the acetylene content is 49.5-50%; the mass concentration of HCl at the gas outlet end is less than or equal to 25 percent, the mass concentration of acetylene is less than or equal to 25 percent, and the balance is chloroethylene; the background converter is a low-concentration synthesis, namely: the mass concentration of HCl at the gas inlet end is less than or equal to 25 percent, the mass concentration of acetylene is less than or equal to 25 percent, the balance is chloroethylene, and the mass concentration of HCl at the gas outlet end is generally required to be less than or equal to 3-5 percent, and the mass concentration of acetylene is less than or equal to 3-5 percent. The high-concentration HCl and the high-concentration acetylene in the front converter synthesize chloroethylene under the action of a catalyst, the reaction is violent, and a large amount of heat is released; after entering the background converter, the concentrations of HCl and acetylene are greatly reduced, the reaction is mild, and therefore the catalysts needed in the foreground and background converters should be different. The traditional process uses mercury catalyst as catalyst, the newly produced mercury catalyst is loaded in a background converter for low-concentration synthesis, and is poured into a foreground converter for high-concentration synthesis after reacting for 4000 hours. The workload is large, the loss is high, and the mercury loss is high. The production and use of mercury catalyst catalysts have been limited.
The chinese patent with patent application number CN202210379046.3 discloses a mercury-free catalyst for producing and synthesizing vinyl chloride by using noble metals, but the production process of the technical scheme uses mercuric chloride, so that the requirement of environmental protection cannot be met.
At present, the research on Ru-based catalysts is increasing, and many researchers prepare bimetallic or trimetallic ruthenium-based catalysts by adding other metal chlorides to modify ruthenium-based catalysts, but the cost is increased; some researchers modify ruthenium-based catalysts by using nonmetal, most researches are carried out by doping nitrogen, oxygen and other elements into a carrier, but carbon deposition is easily caused, the surface acidity is reduced by treating with strong ammonia water, and the formation of an active species ROx is promoted. In addition, the catalytic activity and the adsorption capacity of the ruthenium-based catalyst are intensively researched in the existing research, the requirements of the catalyst in the production process of vinyl chloride are not considered, and the reutilization of the waste ruthenium trichloride is not considered.
Disclosure of Invention
The invention provides a method for preparing a composite catalyst for synthesizing vinyl chloride by utilizing ruthenium trichloride waste in order to overcome the defects of the prior art. Ruthenium trichloride in the waste ruthenium trichloride catalyst generated in the production of trimethylpyruvic acid is separated, and dilithium tetrachlorocuprate is added to prepare the composite catalyst for synthesizing chloroethylene, so that the composite catalyst is suitable for being used in a foreground converter for synthesizing chloroethylene. The reaction in the foreground converter is a reaction of high-concentration HCl and high-concentration acetylene.
The technical scheme adopted by the invention is as follows:
a method for preparing a composite catalyst for synthesizing chloroethylene by utilizing ruthenium trichloride waste comprises the following steps:
1) Wet grinding: adding hot water into the waste ruthenium trichloride catalyst and carrying out wet grinding;
2) Solid-liquid separation;
3) Repeating the steps 1) and 2) for 1-3 times to obtain a solution containing ruthenium trichloride;
4) Adding dilithium tetrachlorocuprate into the dissolution liquid obtained in the step 3), and uniformly stirring to obtain an adjusted solution;
5) And adding activated carbon into the adjusted solution, soaking, taking out the activated carbon, and drying to obtain the composite catalyst for synthesizing the vinyl chloride.
The wet grinding process conditions are as follows: the temperature is 80-90 ℃, and the time is 60-90 minutes.
The effective components of the adjusting solution are ruthenium trichloride and dilithium tetrachlorocuprate, and the mass ratio of the ruthenium trichloride to the dilithium tetrachlorocuprate is as follows: dilithium tetrachlorocuprate =0.1-0.5:5-8.
More preferably, the active ingredients of the conditioning solution are ruthenium trichloride and dilithium tetrachlorocuprate.
The composite catalyst for synthesizing chloroethylene, which is prepared by the method for preparing the composite catalyst for synthesizing chloroethylene by utilizing the ruthenium trichloride waste, is applied to a front converter for synthesizing chloroethylene. The chloroethylene synthesis foreground converter is in a reaction stage of high-concentration HCl and high-concentration acetylene.
In the reaction gas at the gas inlet end of the high-concentration synthesis reaction stage, the mass concentration of HCl is 50-50.5%, the mass concentration of acetylene is 49.5-50%, the mass concentration of HCl at the gas outlet end is less than or equal to 25%, the mass concentration of acetylene is less than or equal to 25%, and the balance is chloroethylene.
Has the advantages that:
(1) the catalyst of the invention can effectively activate alkene and alkyne, and realize corresponding functional group transfer reaction.
(2) The invention prepares the composite catalyst for synthesizing chloroethylene by matching the main catalytic component of hydrated ruthenium trichloride with dilithium tetrachlorocuprate, and the catalyst does not contain mercury and has no pollution to the ecological environment and human health.
(3) The assistant adopted by the invention is dilithium tetrachlorocuprate. The chloride ions and the trivalent ruthenium ions form stable complexes, and when the chloride ions and the trivalent ruthenium ions react with acetylene, the trivalent ruthenium ions are prevented from being reduced by the acetylene, and the service life of the catalyst is prolonged.
(4) The invention takes the waste ruthenium trichloride generated by producing the trimethylpyruvic acid as the main raw material, and the industrial application cost of the catalyst is lower.
Example 1
Taking waste ruthenium trichloride generated in the production of trimethylpyruvic acid as a main raw material, adding water, wet-milling at normal temperature for dissolution, carrying out solid-liquid separation, and repeating the wet-milling and separation operations for 1 time to obtain a solution containing hydrated ruthenium trichloride; adding dilithium tetrachlorocuprate by weight to adjust the mass ratio of ruthenium trichloride to dilithium tetrachlorocuprate in the solution to be 0.1:8, obtaining an adjusting solution, adding active carbon for soaking and drying; the composite catalyst for synthesizing the chloroethylene is prepared. The wet grinding process conditions are as follows: the temperature is 80 ℃ and the time is 60 minutes.
When the catalyst is used for the catalytic reaction of a front converter for synthesizing vinyl chloride, the molar ratio of acetylene to hydrogen chloride is 1:1.05, the space velocity of acetylene is 20h -1 The acetylene conversion was 99.5% and the vinyl chloride selectivity was 99.8%.
Example 2
Taking waste ruthenium trichloride generated in the production of trimethylpyruvic acid as a main raw material, adding water, wet-milling at normal temperature for dissolution, carrying out solid-liquid separation, and repeating the wet-milling and separation operations for 2 times to obtain a solution containing hydrated ruthenium trichloride; adding an auxiliary agent dilithium tetrachlorocuprate by weight, and adjusting the mass ratio of ruthenium trichloride to dilithium tetrachlorocuprate in the solution to be 0.2:7, obtaining an adjusting solution, adding active carbon for soaking and drying; preparing a composite catalyst for synthesizing chloroethylene; the wet grinding process conditions are as follows: the temperature is 90 ℃, and the time is 90 minutes;
when the catalyst is used for the catalytic reaction of a front converter for synthesizing vinyl chloride, the molar ratio of acetylene to hydrogen chloride is 1:1.05, the space velocity of acetylene is 20h -1 The acetylene conversion was 99.7% and the vinyl chloride selectivity was 99.9%.
Example 3
Taking waste ruthenium trichloride generated in the production of trimethylpyruvic acid as a main raw material, adding water, wet-milling at normal temperature for dissolution, carrying out solid-liquid separation, and repeating the wet-milling and separation operations for 3 times to obtain a solution containing hydrated ruthenium trichloride; adding an auxiliary agent dilithium tetrachlorocuprate according to weight; the mass ratio of the ruthenium trichloride in the adjusting solution to the auxiliary agent dilithium tetrachlorocuprate is 0.5:5, obtaining an adjusting solution, adding active carbon for soaking and drying; preparing a catalyst for synthesizing chloroethylene; the mass ratio of the water to the methanol is 3:1; the wet grinding process conditions are as follows: the temperature is 85 ℃, and the time is 75 minutes;
when the catalyst is used for the catalytic reaction of a front converter for synthesizing vinyl chloride, the molar ratio of acetylene to hydrogen chloride is 1:1.05, the space velocity of acetylene is 20h -1 The acetylene conversion was 99.6% and the vinyl chloride selectivity was 99.8%.
Example 4
Taking waste ruthenium trichloride generated in the production of trimethylpyruvic acid as a main raw material, adding water, wet-milling at normal temperature for dissolving out, carrying out solid-liquid separation, and repeating the wet-milling and separation operations for 2 times to obtain a dissolved solution containing hydrated ruthenium trichloride; adding an auxiliary agent dilithium tetrachlorocuprate by weight, adjusting the content of ruthenium trichloride and the auxiliary agent dilithium tetrachlorocuprate in the solution to be 0.4; preparing a catalyst for synthesizing chloroethylene; the mass ratio of the water to the methanol is 3:1; the wet grinding process conditions are as follows: the temperature is 80 ℃, and the time is 60 minutes;
for vinyl chlorideIn the one-stage catalytic reaction, at the temperature of 150 ℃, the molar ratio of acetylene to hydrogen chloride is 1:1.05 and the space velocity of acetylene is 20h -1 The acetylene conversion was 99.7% and the vinyl chloride selectivity was 99.6%.
Comparative example 1
Waste ruthenium trichloride generated in the production of trimethylpyruvic acid is taken as a catalyst, wet milling is carried out to obtain a dissolution liquid containing hydrated ruthenium trichloride, activated carbon is added for soaking, drying is carried out, the dissolution liquid is directly used for catalytic reaction of a chloroethylene synthetic foreground converter, the molar ratio of acetylene to hydrogen chloride is 1:1.05 at the temperature of 150 ℃, and the airspeed flow rate of acetylene is 20h -1 The acetylene conversion was 65% and the vinyl chloride selectivity was 91%.
Comparative example 2
Adding water into commercially available ruthenium trichloride, wet-grinding at normal temperature, and dissolving out to obtain a ruthenium trichloride solution containing hydrate; adding auxiliary agent dilithium tetrachlorocuprate according to the weight ratio of ruthenium trichloride to dilithium tetrachlorocuprate of 0.1: 5 to obtain an adjusted solution, adding active carbon, soaking and drying; preparing a catalyst for synthesizing chloroethylene;
when the catalyst is used in the catalytic reaction of a foreground converter for synthesizing vinyl chloride, the molar ratio of acetylene to hydrogen chloride is 1:1.05 at the temperature of 150 ℃, and the space velocity and the flow velocity of acetylene are 20h -1 The acetylene conversion was 99.4% and the vinyl chloride selectivity was 99.9%.
Comparative example 3
The commercially available ruthenium trichloride hydrate is used as a catalyst and is directly used for catalytic reaction of a front stage converter for synthesizing vinyl chloride, the molar ratio of acetylene to hydrogen chloride is 1:1.05 at the temperature of 150 ℃, and the airspeed and flow rate of the acetylene are 20h -1 The acetylene conversion was 63% and the vinyl chloride selectivity was 90.5%.
Claims (6)
1. A method for preparing a composite catalyst for vinyl chloride synthesis by utilizing ruthenium trichloride waste is characterized by comprising the following steps:
1) Wet grinding: adding a solution into the waste ruthenium trichloride catalyst and carrying out wet grinding;
2) Solid-liquid separation;
3) Repeating the steps 1) and 2) for 1-3 times to obtain a solution containing ruthenium trichloride;
4) Adding dilithium tetrachlorocuprate into the dissolution liquid obtained in the step 3), and uniformly stirring to obtain an adjusted solution;
5) And adding activated carbon into the adjusted solution, soaking, taking out the activated carbon, and drying to obtain the composite catalyst for synthesizing the chloroethylene.
2. The method for preparing the composite catalyst for vinyl chloride synthesis from the ruthenium trichloride waste as claimed in claim 1, wherein the wet milling process conditions are as follows: the temperature is 80-90 ℃, and the time is 60-90 minutes.
3. The method of claim 1, wherein the active ingredients of the adjusting solution are ruthenium trichloride and dilithium tetrachlorocuprate, and the mass ratio of the ruthenium trichloride to the dilithium tetrachlorocuprate is as follows: dilithium tetrachlorocuprate =0.1-0.5:5-8.
4. The method of claim 1, wherein the ruthenium trichloride waste is used for preparing the composite catalyst for vinyl chloride synthesis, and the catalyst for vinyl chloride synthesis comprises the following components in percentage by mass: 0.1 to 0.5 percent of ruthenium trichloride, 5 to 8 percent of dilithium tetrachlorocuprate and the balance of active carbon.
5. The method of claim 1, wherein the prepared composite catalyst for vinyl chloride synthesis is applied to a foreground converter for vinyl chloride synthesis, in which high-concentration HCl and high-concentration acetylene are synthesized.
6. The method for preparing the composite catalyst for synthesizing vinyl chloride by using the ruthenium trichloride waste as claimed in claim 5, wherein the mass concentration of HCl in the reaction gas at the gas inlet end of the converter in the foreground synthesis procedure is 50% -50.5%, and the mass concentration of acetylene is 49.5% -50%; the mass concentration of HCl at the gas outlet end is less than or equal to 25 percent, the mass concentration of acetylene is less than or equal to 25 percent, and the balance is chloroethylene.
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