A catalyst for the preparation of chloropropanol by chlorination of propylene glycol, a preparation method thereof, and an application thereof

Abstract

The present invention provides a preparation method and application of a catalyst for the preparation of chloropropanol by chlorination of propylene glycol, belonging to the technical field of catalyst preparation and application. Under low-temperature conditions, Zr-SiO2 is prepared by reacting a zirconium salt with a silicon source material; Zr-SiO2 and an aluminum source are hydrothermally treated in the presence of a template agent to obtain Zr-Si-Al molecular sieve; finally, a supported zirconium-based mesoporous molecular sieve catalyst is obtained by adding a shaping aid and performing shaping treatment. The supported zirconium-based mesoporous molecular sieve catalyst is used for the chlorination of propylene glycol to prepare chloropropanol. The metal framework combination Zr-SiO2 is prepared under low-temperature conditions and hydrothermally treated. The mild conditions help to control the crystal form and pore structure of the catalyst, reduce energy consumption, and the catalyst is designed into spherical particles with small particle size, which helps to improve the mechanical strength and fluidity in the reactor, and can improve the service life and use effect of the catalyst.

Description

Technical Field

[0001] A catalyst for preparing chloropropanol by chlorination of propylene glycol, its preparation method and application belong to the technical field of catalyst preparation and application. Background Art

[0002] In the traditional chlorohydrin process for producing propylene oxide, chloropropanol is synthesized through the chlorohydrin reaction between chlorine, water and propylene. According to this process, about 1.35 - 1.6 t of chlorine is consumed for every ton of chloropropanol produced, and 120 - 190 kg of dichloropropane is by-produced. At the same time, about 2 t of solid waste and 40 - 80 t of wastewater containing organic substances are generated.

[0003] Since chlorine itself is a toxic substance, it not only poses a health threat to operators during the production process, but chlorine water also causes severe corrosion of production equipment. In addition, with the generation of a large amount of by-products and waste, these substances not only represent a waste of resources, but also pose a severe challenge to environmental protection. Although the chlorohydrin process has a high technical maturity and relatively low investment cost, due to its high chlorine consumption, equipment corrosion problems, and the high cost required to treat waste, this method has obvious deficiencies in terms of environmental protection. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art and provide a catalyst for preparing chloropropanol by chlorination of propylene glycol, its preparation method and application.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a supported zirconium-based mesoporous molecular sieve catalyst, the main body is a supported zirconium-based mesoporous molecular sieve catalyst, including a carrier and an active component. The carrier is a mesoporous Si-Al molecular sieve, and the active component is an active metal zirconium loaded on the surface or in the pores of the carrier; the Si-Al molecular sieve has a pore diameter of 2 nm - 8 nm, and the molar ratio of Al to Zr in the catalyst is 2 - 5:1, and at the same time, the molar ratio of Si to Al in the molecular sieve is 10 - 13:1.

[0006] Specifically, the catalyst is spherical particles with a particle size of 2 mm - 5 mm.

[0007] A preparation method of a catalyst for preparing chloropropanol by chlorination of propylene glycol, the technical solution adopted is: under low-temperature conditions, Zr-SiO2 is prepared by reacting a zirconium salt with a silicon source substance; Zr-SiO2 and an aluminum source are hydrothermally treated in the presence of a template agent to obtain a Zr-Si-Al molecular sieve; finally, a supported zirconium-based mesoporous molecular sieve catalyst is obtained by adding a shaping aid and performing shaping treatment.

[0008] A method for preparing a catalyst for preparing chloropropanol by chlorination of propylene glycol comprises the following steps:

[0009] a) Dissolving active metal zirconium in an aqueous phase at a low temperature of -3°C to 10°C, adding a dispersant, and stirring evenly to form a gel-like substance; then adding an organic base to the gel to adjust the pH to 7-12; raising the temperature to 30°C to 50°C, adding a silicon source under these conditions, continuing stirring, and then removing the solvent by distillation and drying to produce a metal skeleton Zr-SiO2;

[0010] b) adding an aluminum source and the Zr-SiO2 obtained in step a) to a solution containing a template at a temperature of 60° C. to 65° C., stirring uniformly, and performing a hydrothermal treatment at 150° C. to 170° C. for a crystallization time of 48 h to 72 h; after washing and drying, calcining at 500° C. to 600° C. for 6 h to 8 h to finally obtain a supported Zr-Si-Al molecular sieve;

[0011] c) dissolving the supported Zr-Si-Al molecular sieve obtained in step b) in an aqueous phase, adding a molding aid, and mixing to form a wet mass, which is then dried, extruded, molded, and screened to obtain a supported zirconium-based mesoporous molecular sieve catalyst.

[0012] Specifically, the zirconium source of the active metal zirconium in step a) is zirconium chloride or zirconium nitrate.

[0013] Specifically, the dispersant in step a) is polyvinyl pyrrolidone, polyacrylamide or sodium pyrophosphate.

[0014] Specifically, the organic base in step a) is tetrapropylammonium hydroxide, hexamethyleneimine or triethanolamine.

[0015] Specifically, in the above step b), the aluminum source is sodium metaaluminate, aluminum isopropoxide, aluminum sulfate or pseudo-boehmite, and the template is sodium hydroxide, octadecyldimethylbenzyl ammonium chloride or hexadecyltrimethylammonium bromide.

[0016] The invention discloses an application of a catalyst for preparing chloropropanol by chlorinating propylene glycol, which is used for preparing chloropropanol by catalytic chlorination of propylene glycol.

[0017] The invention discloses an application of a catalyst for preparing chloropropanol by chlorinating propylene glycol. The supported zirconium-based mesoporous molecular sieve catalyst is uniformly filled into a microchannel reactor. Raw materials propylene glycol and hydrogen chloride enter the microchannel reactor for reaction. The reaction temperature is controlled at 100° C. to 150° C. The reaction pressure is normal pressure, and the molar ratio of propylene glycol to hydrogen chloride is 1:1.1-1.2.

[0018] Application of a catalyst for preparing chloropropanol by chlorination of propylene glycol, wherein propylene glycol and the above-mentioned zirconium-based mesoporous molecular sieve catalyst are mixed according to a mass ratio of 20-30:1.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. Mild preparation conditions, high selectivity and activity. The metal framework composite Zr-SiO2 is prepared under low-temperature conditions and hydrothermally treated. The mild conditions help to control the crystal form and pore structure of the catalyst, reduce energy consumption, and the catalyst is designed into spherical particles with small particle size, which helps to improve the mechanical strength and fluidity in the reactor, and can improve the service life and use effect of the catalyst.

[0021] 2. Wide adaptability of raw materials and great flexibility of reaction conditions. During the preparation process of the catalyst, the active metal zirconium can be provided by zirconium chloride or zirconium nitrate, there are various choices for the dispersant (such as polyvinylpyrrolidone, polyacrylamide, sodium pyrophosphate), and the organic base can also be selected from tetrapropylammonium hydroxide, hexamethyleneimine, and triethanolamine, and good-performance catalysts can be successfully prepared under different combinations, which reflects the wide adaptability of the present invention to raw materials, is not limited to specific raw material types, reduces the raw material supply risk; the present invention has great flexibility in terms of reaction conditions, can achieve effective catalysis within a wide range of conditions, has relatively loose requirements for equipment and operating conditions in industrial production, and reduces production costs and operating difficulties. Specific embodiments

[0022] The present invention will be specifically described below through examples. Unless otherwise stated, the raw materials used are obtained commercially.

[0023] Example 1

[0024] a) Under the low-temperature condition of 0 °C, dissolve the active metal zirconium in the aqueous phase, add a dispersant, and stir evenly to form a gel-like substance; then, add an organic base to this gel to adjust the pH value to 9; raise the temperature to 40 °C, add a silicon source substance under this condition, continue to stir, and then remove the solvent by distillation and perform drying treatment to obtain the metal framework composite Zr-SiO2;

[0025] b) At a temperature of 65 °C, add the aluminum source and the Zr-SiO2 obtained in step a) to a solution containing a template agent, stir evenly, and perform hydrothermal treatment at 160 °C for a crystallization time of 60 h; after washing and drying, calcine at 550 °C for 7 h to finally obtain the supported Zr-Si-Al molecular sieve;

[0026] c) Dissolve the supported Zr-Si-Al molecular sieve obtained in step b) in an aqueous phase, add a shaping aid, mix to form a wet material mass, and obtain the supported zirconium-based mesoporous molecular sieve catalyst through drying, extrusion, shaping, and screening.

[0027] After obtaining the supported zirconium-based mesoporous molecular sieve catalyst, the Si-Al molecular sieve has a pore diameter of 2 - 8 nm, and the molar ratio of metal Al to Zr in the catalyst is 3:1, while maintaining the molar ratio of Si to Al in the molecular sieve at 12:1.

[0028] Then mix propylene glycol and the above-mentioned zirconium-based mesoporous molecular sieve catalyst according to a mass ratio of 25:1, mix the materials evenly through a mixer, then inject the materials into a microchannel reactor with a micro pump. Subsequently, after heating the reactor temperature to 100 °C, start to introduce HCl gas at a rate of 0.5 L / min. Through the loop, the HCl gas forms a cycle, and connect 30% alkaline solution at the outlet to prevent the diffusion of HCl gas into the air. After reacting for 5 h, sample the solution in the reactor, and the reaction of the chloropropanol content in the organic phase ends.

[0029] After the reaction ends, the obtained reaction solution is subjected to vacuum distillation to extract biomass chloropropanol, and the obtained residual liquid is directly used as the catalyst for the next reaction.

[0030] Example 2

[0031] a) Dissolve the active metal zirconium in an aqueous phase under a low temperature condition of -3 °C, add a dispersant, and stir evenly to form a gel-like substance; subsequently, add an organic base to this gel to adjust the pH value to 7; raise the temperature to 35 °C, add a silicon source substance under this condition, continue to stir, and then remove the solvent by distillation and perform a drying treatment to obtain the metal framework composite Zr-SiO2.

[0032] b) At a temperature of 60 °C, add the aluminum source and the Zr-SiO2 obtained in step a) to a solution containing a template agent, stir evenly, and perform a hydrothermal treatment at 155 °C for a crystallization time of 48 h; after washing and drying treatments, calcine at 550 °C for 7 h to finally obtain the supported Zr-Si-Al molecular sieve.

[0033] c) Dissolve the supported Zr-Si-Al molecular sieve obtained in step b) in an aqueous phase, add a shaping aid, mix to form a wet material mass, and obtain the supported zirconium-based mesoporous molecular sieve catalyst through drying, extrusion, shaping, and screening.

[0034] After obtaining the supported zirconium-based mesoporous molecular sieve catalyst, the Si-Al molecular sieve has a pore diameter of 2 - 8 nm, and the molar ratio of metal Al to Zr in the catalyst is 2:1, while maintaining the molar ratio of Si to Al in the molecular sieve at 10:1.

[0035] Then, propylene glycol and the above-mentioned zirconium-based mesoporous molecular sieve catalyst are mixed according to a mass ratio of 30:1. The materials are evenly mixed through a mixer, and then injected into a microchannel reactor with a micro pump. Subsequently, after heating the reactor temperature to 100 °C, HCl gas is introduced at a rate of 0.5 L / min. Through the loop, the HCl gas forms a cycle. A 30% alkaline solution is connected at the outlet to prevent the diffusion of HCl gas into the air. After reacting for 5 h, the solution in the reactor is sampled, and the reaction ends when the content of chloropropanol in the organic phase is determined.

[0036] After the reaction ends, the obtained reaction solution is subjected to vacuum distillation to extract biomass chloropropanol, and the obtained residual liquid is directly used as the catalyst for the next reaction.

[0037] Example 3

[0038] a) Under the low-temperature condition of -2 °C, dissolve the active metal zirconium in the aqueous phase, add a dispersant, and stir evenly to form a gel-like substance; subsequently, add an organic base to this gel to adjust the pH value to 8; raise the temperature to 45 °C, add a silicon source substance under this condition, continue to stir, and then remove the solvent by distillation and perform a drying treatment to obtain the metal framework composite Zr-SiO₂.

[0039] b) At a temperature of 65 °C, add the aluminum source and the Zr-SiO₂ obtained in step a) to a solution containing a template agent, stir evenly, and perform a hydrothermal treatment at 165 °C for a crystallization time of 72 h; after washing and drying treatments, calcine at 500 °C for 6 h to finally obtain the supported Zr-Si-Al molecular sieve.

[0040] c) Dissolve the supported Zr-Si-Al molecular sieve obtained in step b) in the aqueous phase, add a shaping aid, mix to form a wet material mass, and obtain the supported zirconium-based mesoporous molecular sieve catalyst through drying, extrusion, shaping, and screening.

[0041] After obtaining the supported zirconium-based mesoporous molecular sieve catalyst, the Si-Al molecular sieve has a pore diameter of 2 - 8 nm, and the molar ratio of metal Al to Zr in the catalyst is 4:1, while maintaining the molar ratio of Si to Al in the molecular sieve at 13:1.

[0042] Then, propylene glycol and the above-mentioned zirconium-based mesoporous molecular sieve catalyst are mixed according to a mass ratio of 20:1. The materials are evenly mixed through a mixer, and then injected into a microchannel reactor with a micro pump. Subsequently, after heating the reactor temperature to 100 °C, HCl gas is introduced at a rate of 0.5 L / min. Through the loop, the HCl gas forms a cycle. A 30% alkaline solution is connected at the outlet to prevent the diffusion of HCl gas into the air. After reacting for 5 h, the solution in the reactor is sampled, and the reaction ends when the content of chloropropanol in the organic phase is determined.

[0043] After the reaction is completed, the resulting reaction solution is subjected to vacuum distillation to extract biomass chloropropanol, and the resulting residual liquid is directly used as the catalyst for the next reaction.

[0044] Example 4

[0045] a) Under low temperature conditions of 3 °C, dissolve active metal zirconium in the aqueous phase, add a dispersant, and stir evenly to form a gel-like substance; subsequently, add an organic base to this gel to adjust the pH value to 9; raise the temperature to 30 °C, add a silicon source substance under this condition, continue stirring, then remove the solvent by distillation and perform a drying treatment to obtain a metal framework composite Zr-SiO2;

[0046] b) At a temperature of 60 °C, add the aluminum source and the Zr-SiO2 obtained in step a) to a solution containing a template agent, stir evenly, and perform a hydrothermal treatment at 160 °C for a crystallization time of 50 h; after washing and drying, calcine at 600 °C for 8 h to finally obtain a supported Zr-Si-Al molecular sieve;

[0047] c) Dissolve the supported Zr-Si-Al molecular sieve obtained in step b) in the aqueous phase, add a shaping aid, mix to form a wet material mass, and obtain the supported zirconium-based mesoporous molecular sieve catalyst through drying, extrusion, shaping, and screening.

[0048] After obtaining the supported zirconium-based mesoporous molecular sieve catalyst, the Si-Al molecular sieve has a pore diameter of 2 - 8 nm, and the molar ratio of metal Al to Zr in the catalyst is 5:1, while maintaining the molar ratio of Si to Al in the molecular sieve at 10:1.

[0049] Then mix propylene glycol and the above-mentioned zirconium-based mesoporous molecular sieve catalyst in a mass ratio of 25:1, mix the materials evenly through a mixer, then inject the materials into a microchannel reactor with a micro pump, then heat the reactor temperature to 100 °C, and then start to introduce HCl gas at a speed of 0.5 L / min. Through the loop, the HCl gas forms a cycle, connect 30% alkali solution at the outlet to prevent the diffusion of HCl gas into the air, and take a sample of the solution in the reactor after 5 h of reaction to determine the content of chloropropanol in the organic phase, and the reaction ends.

[0050] After the reaction is completed, the resulting reaction solution is subjected to vacuum distillation to extract biomass chloropropanol, and the resulting residual liquid is directly used as the catalyst for the next reaction.

[0051] Example 5

[0052] a) Under the low temperature condition of -1°C, dissolve the active metal zirconium in the aqueous phase, add a dispersant, and stir evenly to form a gel-like substance; subsequently, add an organic base to this gel, adjust the pH value to 10; raise the temperature to 50°C, add a silicon source substance under this condition, continue to stir, and then remove the solvent by distillation and perform a drying treatment to obtain the metal framework combination Zr-SiO2;

[0053] b) At a temperature of 65°C, add the aluminum source and the Zr-SiO2 obtained in step a) to a solution containing a template agent, stir evenly, and perform a hydrothermal treatment at 155°C for a crystallization time of 48 h; after washing and drying treatments, calcine at 600°C for 7 h to finally obtain the supported Zr-Si-Al molecular sieve;

[0054] c) Dissolve the supported Zr-Si-Al molecular sieve obtained in step b) in the aqueous phase, add a shaping aid, mix to form a wet material mass, and obtain the supported zirconium-based mesoporous molecular sieve catalyst through drying, extrusion, shaping, and screening.

[0055] After obtaining the supported zirconium-based mesoporous molecular sieve catalyst, the Si-Al molecular sieve has a pore diameter of 2 - 8 nm, and the molar ratio of metal Al to Zr in the catalyst is 2:1, while maintaining the molar ratio of Si to Al in the molecular sieve at 12:1.

[0056] Then mix propylene glycol and the above-mentioned zirconium-based mesoporous molecular sieve catalyst according to a mass ratio of 25:1, mix the materials evenly through a mixer, then inject the materials into a microchannel reactor with a micro pump, and then heat the reactor temperature to 100°C, and then start to introduce HCl gas at a speed of 0.5 L / min. Through the loop, the HCl gas forms a cycle, connect 30% alkali solution at the outlet to prevent the diffusion of HCl gas into the air, and take a sample of the solution in the reactor after reacting for 5 h to determine the content of chloropropanol in the organic phase, and the reaction ends.

[0057] After the reaction ends, the obtained reaction solution is subjected to vacuum distillation to extract biomass chloropropanol, and the obtained residual liquid is directly used as the catalyst for the next reaction.

[0058] Example 6

[0059] a) Under the low temperature condition of 7°C, dissolve the active metal zirconium in the aqueous phase, add a dispersant, and stir evenly to form a gel-like substance; subsequently, add an organic base to this gel, adjust the pH value to 7; raise the temperature to 50°C, add a silicon source substance under this condition, continue to stir, and then remove the solvent by distillation and perform a drying treatment to obtain the metal framework combination Zr-SiO2;

[0060] b) At a temperature of 60 °C, add the aluminum source and the Zr-SiO₂ obtained in step a) to a solution containing a template agent, stir evenly, perform hydrothermal treatment at 150 - 170 °C, and the crystallization time is 72 h; after washing and drying, calcine at 500 °C for 8 h to finally obtain the supported Zr-Si-Al molecular sieve;

[0061] c) Dissolve the supported Zr-Si-Al molecular sieve obtained in step b) in an aqueous phase, add a shaping aid, mix to form a wet material mass, and through drying, extrusion, shaping, and screening, obtain the supported zirconium-based mesoporous molecular sieve catalyst.

[0062] After obtaining the supported zirconium-based mesoporous molecular sieve catalyst, the Si-Al molecular sieve has a pore diameter of 2 - 8 nm, and the molar ratio of metal Al to Zr in the catalyst is 3:1, while maintaining the molar ratio of Si to Al in the molecular sieve at 11:1.

[0063] Then mix propylene glycol and the above-mentioned zirconium-based mesoporous molecular sieve catalyst according to a mass ratio of 20:1, mix the materials evenly through a mixer, then inject the materials into a microchannel reactor with a micro pump. Subsequently, after heating the reactor temperature to 100 °C, start to introduce HCl gas at a rate of 0.5 L / min. Through the loop, the HCl gas forms a cycle, and connect 30% alkali solution at the outlet to prevent the diffusion of HCl gas into the air. After reacting for 5 h, sample the solution in the reactor, and the reaction of the content of chloropropanol in the organic phase ends.

[0064] After the reaction ends, the obtained reaction solution is subjected to vacuum distillation to extract biomass chloropropanol, and the obtained residual liquid is directly used as the catalyst for the next reaction.

[0065] Example 7

[0066] a) Under a low temperature condition of 10 °C, dissolve the active metal zirconium in an aqueous phase, add a dispersant, and stir evenly to form a gel-like substance; subsequently, add an organic base to this gel to adjust the pH value to 12; raise the temperature to 30 °C, add a silicon source substance under this condition, continue to stir, and then remove the solvent by distillation and perform a drying treatment to obtain the metal framework combination Zr-SiO₂;

[0067] b) At a temperature of 65 °C, add the aluminum source and the Zr-SiO₂ obtained in step a) to a solution containing a template agent, stir evenly, perform hydrothermal treatment at 170 °C, and the crystallization time is 72 h; after washing and drying, calcine at 600 °C for 6 h to finally obtain the supported Zr-Si-Al molecular sieve;

[0068] c) Dissolve the supported Zr-Si-Al molecular sieve obtained in step b) in an aqueous phase, add a shaping aid, mix to form a wet material mass, and obtain the supported zirconium-based mesoporous molecular sieve catalyst through drying, extrusion, shaping, and screening.

[0069] After obtaining the supported zirconium-based mesoporous molecular sieve catalyst, the Si-Al molecular sieve has a pore diameter of 2 - 8 nm, and the molar ratio of metal Al to Zr in the catalyst is 2:1, while maintaining the molar ratio of Si to Al in the molecular sieve at 13:1.

[0070] Then mix propylene glycol and the above-mentioned zirconium-based mesoporous molecular sieve catalyst in a mass ratio of 30:1, mix the materials evenly through a mixer, then inject the materials into a microchannel reactor with a micro pump. Subsequently, heat the reactor temperature to 100 °C, and then start to introduce HCl gas at a rate of 0.5 L / min. Through the loop, the HCl gas forms a cycle. Connect 30% alkali liquor at the outlet to prevent the diffusion of HCl gas into the air. After reacting for 5 h, sample the solution in the reactor, and the reaction of the content of chloropropanol in the organic phase ends.

[0071] After the reaction ends, the obtained reaction solution is subjected to vacuum distillation to extract biomass chloropropanol, and the obtained residual liquid is directly used as the catalyst for the next reaction.

[0072] .

[0073] The above is only the preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A catalyst for chlorination of propylene glycol to prepare chloropropanols, characterized in that: The main body is a supported zirconium-based mesoporous molecular sieve catalyst, including a carrier and an active component. The carrier is a mesoporous Si-Al molecular sieve, and the active component is active metal zirconium supported on the surface or in the pores of the carrier. The Si-Al molecular sieve has a pore size of 2nm to 8nm, and the molar ratio of Al to Zr in the catalyst is 2 to 5:

1. At the same time, the molar ratio of Si to Al in the molecular sieve is 10 to 13:

1. The preparation method comprises the following steps: a) Dissolving active metal zirconium in an aqueous phase at a low temperature of -3°C to 10°C, adding a dispersant, and stirring evenly to form a gel-like substance; then adding an organic base to the gel to adjust the pH to 7-12; raising the temperature to 30°C to 50°C, adding a silicon source under these conditions, continuing stirring, and then removing the solvent by distillation and drying to produce a metal skeleton Zr-SiO2; b) adding an aluminum source and the Zr-SiO2 obtained in step a) to a solution containing a template at a temperature of 60° C. to 65° C., stirring uniformly, and performing a hydrothermal treatment at 150° C. to 170° C. for a crystallization time of 48 h to 72 h; after washing and drying, calcining at 500° C. to 600° C. for 6 h to 8 h to finally obtain a supported Zr-Si-Al molecular sieve; c) dissolving the supported Zr-Si-Al molecular sieve obtained in step b) in an aqueous phase, adding a molding aid, and mixing to form a wet mass, which is then dried, extruded, molded, and screened to obtain a supported zirconium-based mesoporous molecular sieve catalyst.

2. The use of a catalyst for preparing chloropropanol by chlorination of propylene glycol according to claim 1, wherein: The catalyst is in the form of spherical particles with a particle size of 2 mm to 5 mm.

3. The use of a catalyst for preparing chloropropanol by chlorination of propylene glycol according to claim 1, wherein: The zirconium source of the active metal zirconium in step a) is zirconium chloride or zirconium nitrate.

4. The use of a catalyst for preparing chloropropanol by chlorination of propylene glycol according to claim 1, wherein: The dispersant in step a) is polyvinyl pyrrolidone, polyacrylamide or sodium pyrophosphate.

5. The use of a catalyst for preparing chloropropanol by chlorination of propylene glycol according to claim 1, wherein: The organic base in step a) is tetrapropylammonium hydroxide, hexamethyleneimine or triethanolamine.

6. The use of a catalyst for preparing chloropropanol by chlorination of propylene glycol according to claim 1, wherein: In step b), the aluminum source is sodium metaaluminate, aluminum isopropoxide, aluminum sulfate or pseudo-boehmite, and the template is sodium hydroxide, octadecyldimethylbenzyl ammonium chloride or hexadecyltrimethylammonium bromide.

7. The use of a catalyst for preparing chloropropanol by chlorination of propylene glycol according to claim 1, wherein: The supported zirconium-based mesoporous molecular sieve catalyst is uniformly filled into a microchannel reactor, and raw materials propylene glycol and hydrogen chloride enter the microchannel reactor for reaction. The reaction temperature is controlled at 100° C. to 150° C.; the reaction pressure is normal pressure, and the molar ratio of propylene glycol to hydrogen chloride is 1:1.1-1.2.