38 results about "Catalytic distillation" patented technology

The utility model relates to an energy-saving production device for preparing methyl tert-butyl ether by an isobutane dehydrogenation method. A raw material gasifier is arranged between the catalytic distillation tower feeding and discharging heat exchanger and the catalytic distillation tower, a temperature sensor is arranged on a feeding pipeline from the raw material gasifier to the catalytic distillation tower, a gas phase at the top of the catalytic distillation tower is divided into two pipelines, a compressor is additionally arranged on one pipeline, and an automatic flow regulating valve is additionally arranged on the other pipeline; a cold-side material outlet of the distillation tower feeding and discharging heat exchanger is connected with a cold-side material inlet of the raw material gasifier, a cold-side material outlet of the raw material gasifier is connected with a feeding hole in the middle lower part of the catalytic distillation tower, and a tower top discharging pipeline of the catalytic distillation tower is respectively connected with an inlet of the compressor and a hot-side material inlet of the condenser; an outlet pipeline of the compressor is connected with a hot measuring material inlet of the raw material gasifier, and a hot measuring material outlet of the raw material gasifier is connected with a liquid inlet of the return tank. According to the utility model, a heat pump technology is adopted, so that the heating power of the tower kettle reboiler is reduced, and the steam consumption is reduced; and the method is more economical.

The application provides a continuous hydrogenation-isomerization method capable of meeting the treatment requirements of biological oils, especially waste oils, using a homogeneous hydrogenation process with strong adaptability to raw materials as a raw material pretreatment process, and matching a high-activity nanometer transition metal sulfide catalyst. On this basis, a catalytic distillation process is used for selective cracking of long-chain alkanes to improve the yield of medium and long-chain alkanes; an ultramicro flow hydrogen gas mixer and a reduced non-noble metal hydrogenation-isomerization catalyst are used to reduce the hydrogen / oil ratio and the energy consumption of the circulating hydrogen system, and to reduce the production cost of the catalyst, so as to finally realize efficient and low-carbon conversion of waste oils, and low-cost and high-selectivity preparation of biological aviation kerosene.

The application discloses a system and method for preparing 1-butene by using catalytic C4, and belongs to the technical field of 1-butene production. The technical scheme is that the system comprises an etherification reactor, a catalytic distillation column, a deep etherification reactor, a light component removal column and a heavy component removal column which are sequentially connected. The application uses catalytic C4 as raw material to prepare 1-butene, widens the raw material source for preparing 1-butene, improves the utilization rate of catalytic C4, and has a good application prospect.

The utility model provides a heavy component recycling system in an isobutene preparation process, which comprises a tertiary butanol catalytic distillation tower, an isobutene heavy component removal tower and a tertiary butanol extraction tower, the top of the tertiary butanol catalytic distillation tower is sequentially connected with a catalytic distillation tower condenser, a catalytic distillation tower return tank and an isobutene compressor; an outlet of the isobutene compressor is connected with an inlet in one side of the isobutene heavy component removal tower through a pipeline, the bottom of the isobutene heavy component removal tower is connected with the bottom of the tertiary butanol extraction tower through a pipeline, and the top of the isobutene heavy component removal tower is used for extracting high-purity isobutene; a return pipe of the tertiary butanol catalytic distillation tower is connected with an outlet of a demineralized water tank; an inlet of the demineralized water tank is connected with the bottom of the tertiary butanol extraction tower; demineralized water or sewage at the bottom of the tert-butyl alcohol catalytic distillation tower is collected from an inlet at the top of the tert-butyl alcohol extraction tower, and a purifier is arranged when the sewage at the bottom of the tower is collected. The system has the advantages of short flow, low investment, no additional energy consumption and high tertiary butanol recovery rate.

The invention relates to the field of chemical engineering, in particular to a catalytic distillation method for removing impurities in isooctane reaction raw materials, which comprises the following steps: S1, separating a C4 raw material and butadiene: treating the C4 raw material with desalted water to obtain a washed C4 raw material; carrying out coalescence dehydration treatment on the washed C4 raw material to obtain a dehydrated C4 raw material; the dehydrated C4 raw material is subjected to catalytic rectification treatment, a rectified C4 raw material is obtained, a catalyst for catalytic rectification treatment is a La-Ce / ZSM-5 catalyst, and the rectified C4 raw material is subjected to membrane separation, so that the C4 raw material and butadiene are obtained; and S2, pumping the C4 raw material into an alkylation reactor, and carrying out an alkylation reaction on the C4 raw material and isobutane under the action of a solid superacid catalyst to prepare isooctane. Compared with the prior art, the method has the advantages that impurities in the C4 raw material are removed, the byproduct butadiene and the C4 raw material are extracted, the service life of a catalyst in the isooctane preparation process can be prolonged by using the C4 raw material, the solid superacid catalyst is improved at the same time, and the C4 conversion rate and the isooctane yield are improved.

The invention discloses a production device and a production method of dimethyl adipate, and belongs to the technical field of organic chemical synthesis. According to the scheme, efficient conversion of part of adipic acid is realized in the pre-reactor, so that the reaction load of a subsequent catalytic distillation tower is reduced; cyclohexane is adopted as an azeotropic water-carrying agent in a catalytic distillation tower, water generated by reaction is removed in real time through azeotropic distillation, the equilibrium limitation of esterification reaction is broken, complete conversion of adipic acid is realized, and the reaction efficiency is remarkably improved. According to the method, methanol and cyclopentane are efficiently separated through the washing step, cyclic utilization of cyclopentane is achieved, and raw material consumption is greatly reduced; meanwhile, resource utilization of methanol is achieved through the methanol recovery system, and waste emission is reduced. The method can effectively reduce energy consumption and production cost, improves product quality, and solves the problems of easy catalyst deactivation, severe equipment corrosion, high three-waste treatment cost and the like in the prior art.

The utility model discloses DMMn production equipment, and relates to the technical field of chemical production equipment. The DMMn production equipment comprises a formaldehyde concentration separator, a formaldehyde absorption tower, a pre-reactor and a reactive distillation tower, and the formaldehyde concentration separator is used for concentrating a formaldehyde solution to prepare a concentrated formaldehyde solution and dilute formaldehyde steam; the formaldehyde absorption tower is used for absorbing dilute formaldehyde steam and preparing a dilute formaldehyde solution; the pre-reactor is used for enabling part of formaldehyde to react with methanol to generate methylal; and feeding the pre-reaction material into an upper reaction section of the reactive distillation column, feeding a concentrated formaldehyde solution into a lower reaction section, and generating a DMMn crude product under the action of catalytic distillation. The two formaldehyde solutions react in different areas, and redundant water is extracted in the reaction process, so that the influence of water on the whole reaction system is reduced, the conversion rate of formaldehyde is increased, and self-polymerization of formaldehyde is avoided.

The invention discloses a phenol separation coupling catalysis purification method, and relates to the technical field of fine chemical separation and purification. According to the method, a metal oxide modified H-ZSM-5 molecular sieve is used as a catalyst, a coupling reaction and a separation process are carried out in a catalytic rectifying tower, and two core processes are synchronously completed: 1, impurities such as phenol and o-cresol in raw materials are subjected to a targeted O-alkylation reaction with methanol, and the impurities difficult to separate are efficiently converted into an alkylate easy to rectify; and 2, precise fractionation is synchronously realized, heavy ether products are extracted and removed from a side line, and target products mainly comprising high-purity 2, 6-xylenol and 2, 4-xylenol are obtained in a tower kettle. Through integrated design of targeted conversion and synchronous separation, key impurities are removed with high selectivity, the process is simplified, equipment investment and energy consumption are reduced, non-target side reactions are avoided, and high selectivity, high yield, process economy and product quality of target xylenol are considered.

The invention relates to the technical field of production of dimethyl maleate, and discloses a device and a method for preparing dimethyl maleate. Comprising the following steps: (1) introducing a first raw material containing first liquid methanol and maleic anhydride into a plate tower reactor for first reaction to obtain a first liquid-phase product; in the process system of the first reaction, the molar ratio of the cyclically refluxed methanol to the first liquid methanol is (0.2-0.5): 1; (2) introducing second liquid methanol and the first liquid-phase product into a catalytic distillation tower reactor containing a catalyst, and carrying out a second reaction to obtain a second liquid-phase product; controlling the water content in a gas phase in a catalytic distillation tower in a reaction system in which the second reaction is carried out to be not higher than 30wt% through methanol steam stripping; and (3) carrying out refining treatment on the second liquid phase product to obtain dimethyl maleate. The purity of the dimethyl maleate product obtained in one pass by the method provided by the invention can reach 99% or above.

This invention discloses a high-yield MTBE catalytic distillation apparatus, specifically relating to the field of catalytic equipment technology. It includes a base on which a collection assembly is mounted. The collection assembly includes a catalytic tank housed within the base, with an inner liner in the center of the catalytic tank. The inner liner is equipped with several separation filter covers, all used for filtration. This invention creates a separation chamber between the inner liner and the catalytic tank. Utilizing the stacked separation filter covers on the inner liner, and taking advantage of the higher boiling point of MTBE compared to the feedstock, the unreacted low-boiling-point feedstock rapidly rises to the separation chamber during distillation, while the MTBE product flows downwards after being filtered through the separation filter covers. This achieves efficient separation of the two, solving the problem of difficulty in separating MTBE from low-boiling-point feedstocks in existing technologies.

This invention provides a catalyst for the direct continuous synthesis of dimethyl carbonate from carbon dioxide and methanol, its preparation method, and its application, belonging to the field of catalyst preparation technology. The catalytically active components are firmly loaded onto the surface of a network support using a cyclic high- and low-pressure electrophoretic deposition method, forming a multi-level layered structure with alternating loose and dense layers. When used in a fixed-bed reactor or catalytic distillation reaction section, this catalyst achieves catalytic function while ensuring uniform mixing of reactants in the fixed bed, effectively improving the contact efficiency between reactants and active sites, reducing bed pressure drop, resulting in high dimethyl carbonate yield and selectivity, and also facilitating catalyst recovery and reuse.

The invention provides a continuous hydrogenation-isomerization method capable of meeting the treatment requirements of biological oil and fat, especially waste oil and fat, a homogeneous hydrogenation process with strong raw material adaptability is used as a raw material pretreatment process, and meanwhile, a high-activity nano transition metal sulfide catalyst is matched. On the basis, the long-chain alkane is selectively cracked by adopting a catalytic distillation process, so that the yield of the medium-chain and long-chain alkane is increased; an ultramicro-flow hydrogen mixer and a reduction-state non-noble metal hydroisomerization catalyst are adopted, so that the production cost of the catalyst is reduced while the hydrogen-oil ratio and the energy consumption of a circulating hydrogen system are reduced, and finally, high-efficiency and low-carbon conversion of waste grease and low-cost and high-selectivity preparation of biological aviation kerosene are realized.

The utility model relates to an MTBE (methyl tert-butyl ether) production heat recovery system which comprises an etherification reaction device, a catalytic distillation device and a reboiler arranged at the bottom of the catalytic distillation device. A first heat exchange device and a second heat exchange device are sequentially arranged on a pipeline for connecting a discharge port of the etherification reaction device and a feed port of the catalytic distillation device, and an outlet in the bottom of the catalytic distillation device is connected with a hot side inlet of the first heat exchange device through a pipeline; and a shell pass outlet of the reboiler is connected with a hot side inlet of the second heat exchange device through a pipeline. According to the MTBE production heat recovery system, the energy consumption of the catalytic distillation tower can be reduced, the production cost is reduced, and the economic benefit is improved.

The application belongs to the field of catalytic synthesis of trioxane, and particularly relates to a catalytic synthesis process and device of trioxane. The process comprises the following steps: step one, a mixture of methylal and methanol is mixed with oxygen-containing gas as raw material, and reacts to generate formaldehyde under the action of a first catalyst; step two, formaldehyde is dissolved and absorbed by water to obtain concentrated formaldehyde; step three, the concentrated formaldehyde is subjected to catalytic synthesis reaction under the action of a second catalyst to generate trioxane. The device comprises, in sequence in the feeding direction, an oxidation reactor, a heat exchanger, a formaldehyde absorption tower, a fixed bed reactor and a catalytic distillation tower; compared with pure methanol or pure methylal, the raw material of the application is easier to obtain and has lower production cost; the application obtains higher formaldehyde concentration through improved catalyst, and does not need to prepare high-concentration formaldehyde again by negative pressure concentration, so that the single-pass utilization rate of formaldehyde is improved, and various technical problems in the prior art are properly optimized.

A method for producing diisobutylene and triisobutylene based on isobutylene, first, a metal ion modified strong acid cation exchange resin is placed in a polymerization reactor and a catalytic distillation column; then fresh isobutylene raw material, a part of the reaction product output from the polymerization reactor and a part of the unreacted isobutylene output from the catalytic distillation column are jointly fed into the polymerization reactor for polymerization reaction, a part of the obtained reaction product enters the catalytic distillation column for polymerization reaction, and finally the obtained reaction product is transported to a diisobutylene rectification column, diisobutylene is obtained at the top of the column, and the bottom material is transported to a triisobutylene rectification column, triisobutylene is obtained at the top of the column. The method uses a metal ion modified strong acid cation exchange resin as a catalyst, reduces the activity of the catalyst, makes the polymerization reaction of isobutylene more easily controllable, does not need to add an inhibitor during the reaction process, saves the separation device of the inhibitor, is simple to operate, and produces triisobutylene as a byproduct while producing diisobutylene.

The invention belongs to the technical field of waste plastic resource recovery and heterogeneous catalytic distillation, and discloses a process for preparing an oil product by degrading waste plastic through molten salt distillation. Polyolefin waste plastic is used as a raw material, directional cracking of polyolefin is realized through a distillation degradation reaction under the catalysis and heat transfer synergistic effect of a molten salt system, and segmented separation of an oil product is synchronously completed. According to the process disclosed by the invention, by virtue of high-efficiency catalytic activity and excellent heat transfer performance of a molten salt system, high-efficiency degradation of the polyolefin waste plastics can be realized under relatively mild reaction conditions, and high-quality oil products can be directionally prepared; meanwhile, the preparation process of the molten salt system is simple, convenient and controllable, cyclic regeneration can be realized, the process cost is greatly reduced, and large-scale production is easy to realize. The method provides a brand new technical path for resource conversion of polyolefin waste plastics, has dual values of environmental protection treatment and resource recovery, and has an important application prospect in the fields of solid waste treatment and energy chemical industry.

The invention discloses a production device and a production process of dimethyl maleate. The production device comprises a monomethyl ester reactor, a dimethyl ester reactor and a catalytic distillation depth reactor, maleic anhydride and methanol are firstly mixed and then enter a monomethyl ester reactor, maleic anhydride generates monomethyl maleate in the monomethyl ester reactor, then an outlet material of the monomethyl ester reactor and supplemented methanol are mixed and then enter a dimethyl ester reactor, most of monomethyl maleate is converted into dimethyl maleate in the dimethyl ester reactor, and the dimethyl maleate is converted into dimethyl maleate in the dimethyl ester reactor. An outlet material of the dimethyl ester reactor enters the upper part of the reaction section of the catalytic distillation deep reactor, supplemented methanol is supplemented from the lower part of the reaction section of the catalytic distillation deep reactor, the separation of methanol and ester is completed in the stripping section of the catalytic distillation deep reactor, the methanol at the tower top is recycled after being recovered, and in the reaction section, monoester is in contact with rising methanol; monoester is converted into diester, the diester flows out of a tower kettle, and the diester is purified to be used as a raw material of a subsequent processing procedure.

This application discloses a hydrogenation apparatus and method for producing isooctane from blended oil, belonging to the field of petrochemical technology. The apparatus includes: a catalytic distillation hydrogenation tower, a condenser, a reflux tank, a reboiler, a first compressor, and a hydrogenation reactor. The top of the catalytic distillation hydrogenation tower is connected to the condenser; the condenser is connected to one inlet of the reflux tank; one outlet of the reflux tank is connected to the first compressor; and the other outlet is connected to the catalytic distillation hydrogenation tower. A reboiler is located at the bottom of the catalytic distillation hydrogenation tower; the bottom of the hydrogenation reactor is connected to the catalytic distillation hydrogenation tower. Thus, this application can saturate the olefins in the blended oil, thereby meeting its requirements as a blending component for automotive gasoline and producing isooctane as needed. Furthermore, by separately hydrogenating different components in the blended oil through the catalytic distillation hydrogenation tower and the hydrogenation reactor, equipment and operating costs can be reduced, achieving energy saving and flexible operation.

The present invention discloses a catalytic distillation device and application for recovering heat from raw coal gas and pre-treating coal tar. The device comprises a catalytic distillation tower; a raw coal gas mechanical impurity scrubbing zone at the bottom of the catalytic distillation tower; a suspended bed catalytic distillation zone in the middle of the catalytic distillation tower; at least one liquid material outlet is provided in the middle of the catalytic distillation zone from bottom to top. The liquid material outlet is connected to a heat exchanger via a pipeline. After cooling in the heat exchanger, the material is connected to the upper reflux port and an external discharge line of the catalytic distillation tower via a pipeline; the upper reflux port of the catalytic distillation tower is connected to an oil-soluble suspended bed hydrogenation catalyst addition device; and a gaseous material outlet is provided at the top of the catalytic distillation tower. The device of the present invention can simultaneously recover heat from high-temperature raw coal gas and effectively pre-treat coal tar, laying the foundation for subsequent processing.

The utility model relates to a device for improving the heat exchange efficiency of a feeding preheater of a C4 reaction unit. According to the technical scheme, an outlet of a feeding C4 filter is connected to a shell pass inlet of a catalytic distillation tower top cooler, a shell pass outlet is connected to a tube pass inlet of a reaction efficient heat exchanger, a tube pass outlet is connected to an inlet of an isomerization heating furnace, and an outlet is connected to an inlet of an isomerization reactor; the outlet is connected to a shell pass inlet of the efficient reaction heat exchanger through a pipeline, and a shell pass outlet of the efficient reaction heat exchanger is connected to a shell pass inlet of the reactor discharging heat exchanger through a pipeline. The device has the beneficial effects that the reaction product material at the outlet of the isomerization reactor is sent to the shell pass of the high-efficiency reaction heat exchanger for heat exchange with the feeding raw material, and the reaction product cooled by the high-efficiency reaction heat exchanger is sent to the reactor discharging heat exchanger for continuous circulating heat exchange and cooling operation, so that the heat is recycled; the inlet temperature of the isomerization heating furnace is increased, and the production and operation cost is reduced.

A method and apparatus for catalytic distillation is disclosed. Embodiments may include a catalytic distiller including a pressure vessel; a reactive distillation device positioned in the pressure vessel including a distillation device and a fixed bed catalyst device positioned above the distillation device, wherein the fixed bed catalyst device includes a fixed bed catalyst component and a vapor riser; and flood prevention system to collect and direct a liquid from the fixed bed catalyst component through a fixed bed bypass pipe to the distillation device, wherein the fixed bed bypass pipe, which is connected to the pressure vessel, is positioned outside of the pressure vessel.

The invention belongs to the field of catalytic synthesis of trioxymethylene, and particularly relates to a catalytic synthesis process and device of trioxymethylene. The process comprises the following steps: step 1, mixing a mixture of methylal and methanol as a raw material with oxygen-containing gas, and reacting under the action of a first catalyst to generate formaldehyde; 2, formaldehyde is dissolved and absorbed by water, and concentrated formaldehyde is obtained; and 3, carrying out a catalytic synthesis reaction on the concentrated formaldehyde under the action of a second catalyst to generate trioxymethylene. The device comprises an oxidation reactor, a heat exchanger, a formaldehyde absorption tower, a fixed bed reactor and a catalytic distillation tower which are sequentially connected along a feeding direction, compared with pure methanol or pure methylal, the raw materials are easier to obtain, and the production cost is lower; by improving the catalyst, the concentration of the obtained formaldehyde is higher, and the high-concentration formaldehyde is prepared without negative pressure concentration, so that the one-way utilization rate of the formaldehyde is improved, and various technical problems in the prior art are properly optimized.

The invention discloses a method for producing cyclic carbonate through heterogeneous catalytic distillation, and belongs to the technical field of carbonate preparation. The method comprises the following steps: filling a heterogeneous catalyst into a catalytic rectifying tower in the form of a filler, taking dihydric alcohol and dimethyl carbonate as raw materials, reacting in the catalytic rectifying tower to generate methanol and cyclic carbonate, and forming azeotrope by the generated methanol and dimethyl carbonate, so that the reaction and separation are synchronously performed, and the generation of cyclic carbonate is promoted; carrying out high-pressure rectification and normal-pressure rectification separation on the azeotrope to obtain methanol and excessive dimethyl carbonate; the reaction rectification product is subjected to dimethyl carbonate recovery, dihydric alcohol recovery and separation to obtain the product, and the purity can reach 99.99% or above. The continuous production of cyclic carbonate is realized, the conversion of dihydric alcohol is improved through the circulation of dimethyl carbonate, the utilization rate of dihydric alcohol can reach 99% or above, and the process can be stably operated for a long time.

The application discloses a novel sec-butyl acetate production device and production process, and relates to the technical field of organic chemical industry and chemical process technology. The application takes a catalytic distillation tower as a core, integrates a two-section esterification reactor, a C4 deacidification tower, an azeotropic distillation tower, a sec-butyl acetate product tower and a de-acetic acid tower, and adopts a solid acid catalyst to reduce corrosion and pollution, utilizes catalytic distillation to strengthen reaction balance, improves conversion rate, optimizes tower operation conditions, simplifies a process and reduces energy consumption, realizes efficient, clean and low-cost production of sec-butyl acetate, and meets the increasing demand of the market for environment-friendly solvents.

The utility model relates to the technical field of catalytic distillation tower top condensers, in particular to a catalytic distillation tower top condenser convenient to disassemble and clean, which comprises a tube box with a heat exchange tube fixedly mounted at one end and a shell pass cylinder sleeved outside the heat exchange tube and detachably connected with the tube box, the tube box is provided with a linear feeding moving mechanism for driving the shell pass barrel to perform feeding motion towards the tube box side, and the end part, close to the tube box side, of the shell pass barrel is provided with an annular spraying mechanism and is matched with a cleaning liquid supply mechanism for supplying liquid to the annular spraying mechanism. And cleaning liquid is sprayed to the heat exchange tubes in the separation process, so that the stability and efficiency of disassembly and cleaning are improved.

The selective dimerization of isoolefins such as isobutylene or isopentane or mixtures thereof can be carried out in a system comprising a series of fixed bed reactors and catalytic distillation reactors. The system can pass the fixed bed reactor effluent to the downstream reactors without intermediate separation of the desired product from unreacted components. It has been found that high selectivity to dimers can be achieved even without intermediate separation of the desired product from unreacted components between reactors. In addition, embodiments provide for the use of a partitioned wall column to recover high purity dimer product, thereby reducing unit element count and site size.

Disclosed are systems and methods for producing MTBE without the use of a catalytic distillation column or superfractionator. An optimal methanol stream volume required to maximize MTBE production and minimize isobutylene loss is fed along with a crude C4 stream to a primary reactor comprising a first and second reactors connected in parallel, configured to produce a maximum final volume of MTBE at a level greater than or equal to a commercial quality specification for a stable purity. The combined effluent from the first and second reactors is split to form a first portion, a second portion, and a third portion. The first portion is fed to a third reactor configured to produce additional MTBE. The second portion is combined with the effluent from the third reactor for further separation. The third portion is recycled to the first and / or second reactors.

The utility model relates to catalytic distillation reflux tank technical field, concretely for a kind of discharging device for catalytic distillation reflux tank, including the discharging tank that top can be communicated with the discharging port of catalytic distillation reflux tank, the bottom of discharging tank is fixedly connected with the discharging pipe and reflux pipe of being separately arranged in two sides, the inner bottom of discharging tank is rotatably connected with the adjusting cylinder that is sealed sliding fit with discharging tank inner side wall, the bottom of adjusting cylinder is circumferentially provided with the discharging pass-through of being communicated with discharging pipe and reflux pipe, when any one of discharging pipe and reflux pipe and one discharging pass-through are completely penetrated, the utility model is convenient for the flow rate ratio of quick backflow and discharging, and adjustment is more convenient.

The utility model relates to the technical field of catalytic distillation, and provides a novel catalytic distillation module, which comprises a structured packing assembly and a catalyst, the structured packing assembly is formed by alternately stacking a plurality of structured packing, two adjacent structured packing form a hollow channel, and the catalyst is in bulk in the hollow channel of the whole structured packing assembly. The structured packing comprises a first pore plate, a second pore plate and a metal wire mesh which are sequentially connected, and the first pore plate, the metal wire mesh and the second pore plate are tightly attached and pressed into a corrugated plate shape. The pressure drop of the distillation tower is not increased while the high filling amount is ensured, and the reaction air speed can be adjusted in a large range.

This invention discloses a catalytic synthesis process for methyl tert-butyl ether, belonging to the field of etherification catalytic synthesis technology. The main raw materials are methanol and pre-ether C4. By introducing mesoporous silica in situ into a strongly acidic cation exchange resin and loading sulfonic acid imidazole trifluoromethanesulfonate ionic liquid into the ion exchange resin, a composite catalyst with a multi-level pore structure is formed, thereby significantly improving the utilization rate of acidic sites inside the catalyst. The resulting modified catalyst can be used in the etherification reaction of methyl tert-butyl ether and subsequent catalytic distillation process, so that the reaction equilibrium continuously shifts towards the product, thereby improving the overall conversion rate of the etherification reaction. This process also improves the raw material conversion rate and product purity through the synergistic effect of reaction and separation, and realizes the recycling of raw materials by combining a methanol recovery system. This process has high reaction efficiency, good catalyst stability, and is suitable for large-scale industrial continuous production.