Alkylation multistage reactor and method of using same

Abstract

The present application relates to the technical field of reactor, in particular to a multistage reactor for alkylation and a method for using the same, comprising a barrel, a conical part is arranged at the bottom end of the barrel, a baffle one is fixedly connected to the inner side wall of the top end of the barrel, a baffle two is fixedly connected to the inner side wall of the barrel below the baffle one, a mixing cavity one is arranged above the baffle one, and a mixing cavity two is arranged between the baffle one and the baffle two.In the present application, the heavy phase material is added into the mixing cavity one through the heavy phase feeding pipe and the light phase material is added into the mixing cavity one through the dispersing assembly by arranging the dispersing assembly and the impeller group two, the main sleeve is driven to rotate by the motor, the plurality of vertical distribution pipes are driven to rotate by the main sleeve, the light phase material and the heavy phase material are rotated and mixed in the mixing cavity one by combining the oblique injection angle of the heavy phase material, and the liquid in the mixing cavity one is disturbed by the plurality of communication pipes one, so that the swirling is eliminated and the mixing efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of reactor technology, and more specifically to an alkylation multistage reactor and its usage method. Background Technology

[0002] Alkylation mainly refers to the organic addition reaction of isobutane and butene in the presence of concentrated sulfuric acid, where alkane molecules are added to olefin molecules to produce a mixture of alkanes with multiple branches, collectively known as alkylated oil. The reaction is mainly completed at the interface between the liquid catalyst and the hydrocarbon reactants. The renewal rate of the interface and the ratio of alkanes to olefins near the interface are key factors affecting the selectivity of the main reaction. To achieve higher selectivity of alkylated products, the alkylation reaction requires strong liquid-liquid mixing.

[0003] Chinese patent CN112237896B discloses a novel reactor for the alkylation of ionic liquids with enhanced mixing. By having the heavy phase flow into the mixing chamber from the tangential inlet to form a swirling flow, the light phase enters the reactor from the jet orifice and mixes with the rotating heavy phase, thus achieving automatic mixing of non-uniform liquids. However, its mixing efficiency is not high.

[0004] Existing hydrocyclones often have poor mixing performance and mainly focus on improving separation performance. Integrating the mixing and separation processes of heterogeneous liquids into one unit will greatly improve the production efficiency of the equipment, but the mixing efficiency is not good. Summary of the Invention

[0005] To overcome the aforementioned technical problems, the present invention aims to provide an alkylation multi-stage reactor and its usage method. Through the arrangement of a dispersion assembly and impeller assembly II, heavy phase material is added to mixing chamber I through a heavy phase feed pipe, and light phase material is added to mixing chamber I through the dispersion assembly. A motor drives the main sleeve to rotate, which in turn drives multiple vertical branch pipes to rotate. Combined with the inclined injection angle of the heavy phase material, the light and heavy phase materials rotate within mixing chamber I, thus being mixed. Simultaneously, multiple connecting pipes agitate the liquid vortex within mixing chamber I, thereby eliminating vortexing and improving mixing efficiency. After mixing, the materials overflow upwards from connecting pipe I into mixing chamber II. A catalyst is added to mixing chamber II through a catalyst pipe. The catalyst and material mixture mix within mixing chamber II. The rotation of impeller assembly II and the interference from impeller assembly I further enhance the mixing of the catalyst and material mixture, thereby improving reaction efficiency.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] An alkylation multistage reactor includes a cylindrical body with a conical section at its bottom. A first partition plate is fixedly connected to the inner wall of the top of the cylindrical body. A second partition plate is fixedly connected to the inner wall of the cylindrical body below the first partition plate. A first mixing chamber is located above the first partition plate. A second mixing chamber is located between the first and second partition plates. A main sleeve is rotatably sleeved at the middle of the top of the cylindrical body, and the main sleeve is rotatably sleeved with both the first and second partition plates. An outer sleeve is fixedly sleeved to the outer wall of the top of the main sleeve. The outer sleeve has annular... A dispersion component is fixedly connected to the bottom end of the outer side wall of the cylindrical body. Heavy phase feed pipes are fixedly connected to both sides of the outer side wall of the mixing chamber one. Multiple connecting pipes are fixedly connected at equal angles to the inner side wall of the mixing chamber one. The bottom end of each connecting pipe extends through a partition plate one into the mixing chamber two. Multiple connecting pipes are fixedly connected at equal angles to the inner side wall of the mixing chamber two. The bottom end of each connecting pipe extends through a partition plate two and below the partition plate two. A motor is fixedly connected to the top end of the cylindrical body. The output end of the motor is connected to the main sleeve. The top of the pipe is fixedly connected, and the outer wall of the second mixing chamber is fixedly connected to a catalyst pipe. The heavy phase material is added into the first mixing chamber through the heavy phase feed pipe, and the light phase material is added into the first mixing chamber through the dispersion component. The motor drives the main sleeve to rotate, and the main sleeve drives multiple vertical branch pipes to rotate. Combined with the inclined injection angle of the heavy phase material, the light phase material and the heavy phase material rotate in the first mixing chamber and are thus mixed. At the same time, multiple connecting pipes disturb the liquid vortex in the first mixing chamber, thereby eliminating vortexing and improving mixing efficiency. After the material is mixed, it overflows upward from the first connecting pipe into the second mixing chamber. The catalyst is added into the second mixing chamber through the catalyst pipe. The catalyst and the material mixture are mixed in the second mixing chamber, which makes the material react quickly. The liquid mixture after the reaction enters the conical part from the second connecting pipe. The heavier reaction products and catalyst move downward along the inner wall of the conical part under the action of centrifugal force. The light phase products gather at the middle position of the conical part and are extracted upward by the main sleeve. The heavy phase products and catalyst are discharged from the bottom of the conical part.

[0008] Furthermore, the outermost wall of the outer sleeve is rotatably connected to the top of the cylinder, the top of the outer sleeve is rotatably connected to a first adapter ring, the first adapter ring is rotatably connected to the outermost wall of the main sleeve, the outermost wall of the first adapter ring is fixedly connected to a light phase feed pipe, the top of the main sleeve is rotatably connected to a second adapter ring, and one side of the second adapter ring is fixedly connected to a discharge pipe. The light phase product below the main sleeve is extracted through the discharge pipe, and the light phase material is added into the outer sleeve through the light phase feed pipe.

[0009] Furthermore, the dispersion component includes an annular seat, which is fixedly connected to the bottom outer wall of the outer sleeve. A horizontal pipe is fixedly connected to the outer wall of the annular seat at an equal angle. A vertical branch pipe is fixedly connected to the bottom surface of the horizontal pipe. A circular hole is opened on one side of the bottom end of the outer wall of the vertical branch pipe, through which the light phase material is directly dispersed into the heavy phase material.

[0010] Furthermore, the multiple vertical pipes are arranged in a vortex pattern. When the multiple vertical pipes rotate, the liquid at the bottom of the mixing chamber diffuses from the center to the surrounding areas, thereby causing the liquid in the center to flow from top to bottom, thus circulating the liquid up and down and increasing the mixing effect.

[0011] Furthermore, a connecting frame is fixedly connected between the bottom ends of the plurality of vertical branch pipes to fix the bottom ends of the plurality of vertical branch pipes.

[0012] Furthermore, an impeller assembly 2 is fixedly sleeved on the outer wall of the main sleeve above the partition 2. Multiple impeller assemblies 1 are equidistantly fixed to the bottom surface of the partition 1, and the blades of two adjacent impeller assemblies rotate in opposite directions. The impeller assembly 2 drives the liquid to rotate in the mixing chamber 2, and the impeller assembly 1 interferes with the liquid water swirl, thereby increasing the mixing efficiency.

[0013] Furthermore, the bottom end of the first connecting pipe is offset to one side, and the bottom end of the second connecting pipe is offset to the other side. When the material liquid is sprayed out from the bottom end of the first connecting pipe, it is in opposition to the rotation direction of the impeller assembly 2, thereby increasing the degree of mixing of the material liquid in the mixing chamber 2.

[0014] Furthermore, a rotating component is fixedly connected to the inner sidewall of the bottom end of the conical part, which facilitates the upward deflection of the light phase product after contacting the rotating component, thereby facilitating the upward extraction of the light phase product by the main sleeve.

[0015] The operating procedure of the alkylation multistage reactor is as follows:

[0016] Step 1: Add the heavy phase material into the mixing chamber 1 through the heavy phase feed pipe, and add the light phase material into the outer sleeve through the light phase feed pipe, and then into the mixing chamber 1 through the horizontal pipe and the vertical branch pipe;

[0017] Step 2: The motor drives the main sleeve to rotate, and the main sleeve drives multiple vertical branch pipes to rotate. Combined with the inclined injection angle of the heavy phase material, the light phase material and the heavy phase material rotate in the mixing chamber 1 and are thus mixed. At the same time, multiple connecting pipes agitate the liquid vortex in the mixing chamber 1, thereby eliminating vortexing and improving mixing efficiency. After the material is mixed, it overflows upward from the connecting pipe 1 into the mixing chamber 2.

[0018] Step 3: Add the catalyst to the second mixing chamber through the catalyst pipeline. The rotation of the main sleeve drives the second impeller assembly to rotate, thereby agitating the liquid in the second mixing chamber. This allows the catalyst and the material mixture to mix in the second mixing chamber, enabling the material to react quickly. The multiple impeller assemblies disrupt the liquid vortex in the second mixing chamber, thereby increasing the mixing efficiency.

[0019] Step 4: The liquid mixture after the reaction enters the conical section through the connecting pipe 2. The heavier reaction products and catalysts rotate and move downward along the inner wall of the conical section under the action of centrifugal force. The lighter phase products gather at the middle position of the conical section and are drawn out upward by the main sleeve. The heavier phase products and catalysts are discharged from the bottom of the conical section.

[0020] The beneficial effects of this invention are:

[0021] 1. By setting up the dispersion component and impeller group two, the heavy phase material is added into the mixing chamber one through the heavy phase feed pipe, and the light phase material is added into the mixing chamber one through the dispersion component. The motor drives the main sleeve to rotate, and the main sleeve drives multiple vertical branch pipes to rotate. Combined with the inclined injection angle of the heavy phase material, the light phase material and the heavy phase material rotate in the mixing chamber one and are thus mixed. At the same time, multiple connecting pipes agitate the liquid vortex in the mixing chamber one, thereby eliminating vortexing and improving mixing efficiency. After the material is mixed, it overflows upward from the connecting pipe one into the mixing chamber two. The catalyst is added into the mixing chamber two through the catalyst pipe. The catalyst and the material mixture are mixed in the mixing chamber two. At the same time, the rotation of impeller group two and the interference of impeller group one make the catalyst and material mixture better mixed, thereby improving the reaction efficiency.

[0022] 2. By setting up connecting pipe one and connecting pipe two, when the material liquid is sprayed out from the bottom of connecting pipe one, it collides with the rotating liquid in mixing chamber two, thereby quickly dispersing the newly added material liquid, avoiding the formation of a partition, facilitating faster mixing between the liquid and the catalyst, and increasing the mixing efficiency. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the cylinder in this invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of mixing cavity one and mixing cavity two in this invention;

[0027] Figure 4 This is a schematic diagram of the structure of the dispersed component in this invention;

[0028] Figure 5 This is a schematic diagram of the main sleeve structure in this invention;

[0029] Figure 6 This is a schematic diagram of the impeller assembly structure in this invention.

[0030] In the diagram: 100, cylinder; 101, conical section; 110, heavy phase feed pipe; 120, rotating component; 130, mixing chamber one; 131, connecting pipe one; 140, baffle one; 141, impeller assembly one; 150, mixing chamber two; 151, connecting pipe two; 160, baffle two; 170, catalyst pipe; 180, dispersion assembly; 181, annular seat; 182, horizontal pipe; 183, connecting frame; 184, vertical branch pipe; 190, main sleeve; 191, outer sleeve; 192, transition ring one; 193, transition ring two; 194, light phase feed pipe; 195, discharge pipe; 196, impeller assembly two; 200, motor. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-6As shown, the alkylation multistage reactor includes a cylindrical body 100, with a conical section 101 at the bottom end. A first partition 140 is fixedly connected to the inner wall of the top end of the cylindrical body 100. A second partition 160 is fixedly connected to the inner wall of the cylindrical body 100 below the first partition 140. A first mixing chamber 130 is provided above the first partition 140. A second mixing chamber 150 is provided between the first partition 140 and the second partition 160. A main sleeve 190 is rotatably sleeved at the middle of the top end of the cylindrical body 100. The main sleeve 190 is rotatably sleeved with the first partition 140 and the second partition 160. An outer sleeve 191 is fixedly sleeved to the outer wall of the top end of the main sleeve 190. The bottom end of the annular outer wall of the outer sleeve 191 is fixedly connected to the dispersion component 180. Both sides of the outer wall of the mixing chamber 130 of the cylinder 100 are fixedly connected to heavy phase feed pipes 110. Multiple connecting pipes 131 are fixedly connected at equal angles to the inner wall of the mixing chamber 130. The bottom end of each connecting pipe 131 extends through the partition 140 into the mixing chamber 150. Multiple connecting pipes 151 are fixedly connected at equal angles to the inner wall of the mixing chamber 150. The bottom end of each connecting pipe 151 extends through the partition 160 and below the partition 160. A motor 200 is fixedly connected to the top of the cylinder 100. The output end is fixedly connected to the top of the main sleeve 190. The outer wall of the mixing chamber 2 150 is fixedly connected to the catalyst pipe 170. The heavy phase material is added into the mixing chamber 1 130 through the heavy phase feed pipe 110, and the light phase material is added into the mixing chamber 1 130 through the dispersion component 180. The motor 200 drives the main sleeve 190 to rotate, and the main sleeve 190 drives multiple vertical branch pipes 184 to rotate. Combined with the inclined injection angle of the heavy phase material, the light phase material and the heavy phase material rotate in the mixing chamber 1 130 and are thus mixed. At the same time, multiple connecting pipes 131 disturb the liquid vortex in the mixing chamber 1 130, thereby eliminating vortexing. To improve mixing efficiency, after mixing, the materials overflow upward from the connecting pipe 131 into the mixing chamber 150. The catalyst is added to the mixing chamber 150 through the catalyst pipe 170. The catalyst and the material mixture are mixed in the mixing chamber 150, which makes the materials react quickly. The liquid mixture after the reaction enters the conical part 101 from the connecting pipe 151. The heavier reaction products and catalyst rotate and move downward along the inner wall of the conical part 101 under the action of centrifugal force. The lighter phase products gather at the middle position of the conical part 101 and are extracted upward by the main sleeve 190. The heavier phase products and catalyst are discharged from the bottom of the conical part 101.

[0033] The outermost wall of the outer sleeve 191 is rotatably sleeved with the top of the cylinder 100. A transition ring 192 is rotatably connected to the top of the outer sleeve 191. The transition ring 192 is rotatably sleeved with the outermost wall of the main sleeve 190. A light phase feed pipe 194 is fixedly connected to the outermost wall of the transition ring 192. A second transition ring 193 is rotatably connected to the top of the main sleeve 190. A discharge pipe 195 is fixedly connected to one side of the second transition ring 193, through which the light phase product below the main sleeve 190 is discharged. The material is extracted and added into the outer tube 191 through the light phase feed pipe 194. The dispersion component 180 includes an annular seat 181, which is fixedly connected to the bottom outer wall of the outer tube 191. A horizontal pipe 182 is fixedly connected to the outer wall of the annular seat 181 at an equal angle. A vertical branch pipe 184 is fixedly connected to the bottom surface of the horizontal pipe 182. A round hole is opened on one side of the bottom end of the outer wall of the vertical branch pipe 184. The light phase material is directly dispersed into the heavy phase material through the vertical branch pipe 184.

[0034] Multiple vertical pipes 184 are arranged in a vortex pattern. When the multiple vertical pipes 184 rotate, the liquid diffuses from the center to the surrounding areas at the bottom of the mixing chamber 130, causing the liquid in the center to flow from top to bottom, thus circulating the liquid up and down and increasing the mixing effect. A connecting frame 183 is fixedly connected to the bottom ends of the multiple vertical pipes 184 to fix the bottom ends of the multiple vertical pipes 184. An impeller assembly 196 is fixedly sleeved on the outer wall of the main sleeve 190 above the partition 160. Multiple impeller assemblies 141 are fixedly connected at equal intervals on the bottom surface of the partition 140, and the blades of adjacent two impeller assemblies rotate in opposite directions. The impeller assembly 196 drives the liquid to rotate in the mixing chamber 150, and the impeller assembly 141 interferes with the liquid swirl, thereby increasing the mixing efficiency.

[0035] The bottom end of connecting pipe 131 is offset to one side, and the bottom end of connecting pipe 151 is offset to the other side. When the material liquid is ejected from the bottom end of connecting pipe 131, it collides with the rotation direction of impeller assembly 196, thereby increasing the mixing degree of the material liquid in mixing chamber 150. A rotating part 120 is fixedly connected to the inner wall of the bottom end of the conical part 101, which facilitates the upward deflection of the light phase product after contacting the rotating part 120, thereby facilitating the upward extraction of the light phase product by the main sleeve 190. The method of using the alkylation multistage reactor is as follows:

[0036] Step 1: Add the heavy phase material into the mixing chamber 130 through the heavy phase feed pipe 110, and add the light phase material into the outer sleeve 191 through the light phase feed pipe 194, and add it into the mixing chamber 130 through the horizontal pipe 182 and the vertical branch pipe 184.

[0037] Step 2: The motor 200 drives the main sleeve 190 to rotate, and the main sleeve 190 drives multiple vertical branch pipes 184 to rotate. Combined with the inclined injection angle of the heavy phase material, the light phase material and the heavy phase material rotate in the mixing chamber 130 and are thus mixed. At the same time, multiple connecting pipes 131 disturb the liquid vortex in the mixing chamber 130, thereby eliminating vortexing and improving mixing efficiency. After mixing, the material overflows upward from the connecting pipes 131 into the mixing chamber 250.

[0038] Step 3: The catalyst is added to the mixing chamber 2 150 through the catalyst pipe 170. The main sleeve 190 rotates, driving the impeller assembly 2 196 to rotate, thereby stirring the liquid in the mixing chamber 2 150, so that the catalyst and the material mixture are mixed in the mixing chamber 2 150, allowing the material to react quickly. Multiple impeller assemblies 141 disturb the liquid vortex in the mixing chamber 2 150, thereby increasing the mixing efficiency.

[0039] Step 4: The liquid mixture after the reaction enters the conical part 101 through the connecting pipe 2 151. The heavier reaction products and catalysts rotate and move downward along the inner wall of the conical part 101 under the action of centrifugal force. The lighter phase products gather at the middle position of the conical part 101 and are extracted upward by the main sleeve 190. The heavier phase products and catalysts are discharged from the bottom of the conical part 101.

[0040] Working principle: During use, the heavy phase material is added into the mixing chamber 130 through the heavy phase feed pipe 110, and the light phase material is added into the outer sleeve 191 through the light phase feed pipe 194, and then into the mixing chamber 130 through the horizontal pipe 182 and the vertical branch pipe 184. The motor 200 drives the main sleeve 190 to rotate, and the main sleeve 190 drives multiple vertical branch pipes 184 to rotate. Combined with the inclined injection angle of the heavy phase material, the light phase material and the heavy phase material rotate in the mixing chamber 130 and are thus mixed. At the same time, multiple connecting pipes 131 disturb the liquid vortex in the mixing chamber 130, thereby eliminating vortex and improving mixing efficiency. After mixing, the material overflows upward from the connecting pipes 131 into the mixing chamber 250.

[0041] The catalyst is added to the mixing chamber 150 through the catalyst pipe 170. The rotation of the main sleeve 190 drives the impeller assembly 196 to rotate, thereby agitating the liquid in the mixing chamber 150. This allows the catalyst and the material mixture to mix in the mixing chamber 150, resulting in a rapid reaction. Multiple impeller assemblies 141 disrupt the liquid vortex in the mixing chamber 150, thereby increasing the mixing efficiency. The reacted liquid mixture enters the conical section 101 through the connecting pipe 151. The heavier reaction products and catalyst move downward along the inner wall of the conical section 101 under the action of centrifugal force. The lighter phase products gather at the middle position of the conical section 101 and are drawn out upward by the main sleeve 190. The heavier phase products and catalyst are discharged from the bottom of the conical section 101.

[0042] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. Alkylation multistage reactor comprising a cylinder, characterized in that, The bottom end of the barrel is provided with a conical part, the inner side wall of the top end of the barrel is fixedly connected with a baffle one, the inner side wall of the barrel is fixedly connected with a baffle two below the baffle one, the upper side of the baffle one is provided with a mixing cavity one, the baffle one and the baffle two are provided with a mixing cavity two, the middle position of the top end of the barrel is rotatably sleeved with a main sleeve, the main sleeve is rotatably sleeved with the baffle one and the baffle two, the top end of the main sleeve is fixedly sleeved with an outer sleeve, the annular outer side wall of the outer sleeve is fixedly communicated with a dispersion assembly at the bottom end, the outer side wall of the mixing cavity one of the barrel is fixedly communicated with a heavy phase feeding pipe on both sides, the inner side wall of the mixing cavity one is fixedly connected with a plurality of communication pipes one at equal angles, the bottom end of the communication pipe one extends into the mixing cavity two through the baffle one, the inner side wall of the mixing cavity two is fixedly connected with a plurality of communication pipes two at equal angles, the bottom end of the communication pipe two extends to below the baffle two through the baffle two, the top end of the barrel is fixedly connected with a motor, the output end of the motor is fixedly connected with the top end of the main sleeve, the outer side wall of the mixing cavity two is fixedly communicated with a catalyst pipe, the outer side wall of the main sleeve is fixedly sleeved with an impeller group two above the baffle two, the bottom surface of the baffle one is fixedly connected with a plurality of impeller groups one at equal distances, and the blades of adjacent two impeller groups are opposite in rotation direction; The top end of the outer sleeve is rotatably sleeved with the top end of the barrel, the top end of the outer sleeve is rotatably communicated with an adapter ring one, the adapter ring one is rotatably sleeved with the outer side wall of the main sleeve, the outer side wall of the adapter ring one is fixedly communicated with a light phase feeding pipe, the top end of the main sleeve is rotatably communicated with an adapter ring two, one side of the adapter ring two is fixedly communicated with a discharge pipe, the light phase product below the main sleeve is extracted through the discharge pipe, the light phase material is added into the outer sleeve through the light phase feeding pipe, the dispersion assembly comprises an annular seat, the annular seat is fixedly communicated with the bottom end of the outer sleeve, the outer side wall of the annular seat is fixedly communicated with a horizontal pipe at equal angles, the bottom surface of the horizontal pipe is fixedly communicated with a vertical pipe, a circular hole is formed in one side of the bottom end of the outer side wall of the vertical pipe, and the light phase material is directly dispersed into the heavy phase material through the vertical pipe.

2. The multistage reactor for alkylation according to claim 1, characterized in that, A plurality of the vertical pipes are arranged in a vortex shape.

3. The multistage reactor for alkylation according to claim 2, characterized in that, A plurality of the vertical pipes are fixedly connected with a connecting frame between the bottom ends.

4. The multistage reactor for alkylation according to claim 1, wherein The bottom end of the communication pipe one is offset to one side, and the bottom end of the communication pipe two is offset to the other side.

5. The multistage reactor for alkylation according to claim 1, wherein The bottom end of the conical part is fixedly connected with a rotary part.

6. The method of using a multistage reactor for alkylation according to claim 1, wherein, The specific use steps of the alkylating multistage reactor are as follows: Step one: the heavy phase material is added into the mixing cavity one through the heavy phase feeding pipe, the light phase material is added into the outer sleeve from the light phase feeding pipe, and then added into the mixing cavity one through the horizontal pipe and the vertical pipe; Step two: the motor drives the rotation of the main sleeve, the main sleeve drives the rotation of a plurality of vertical pipes, the light phase material and the heavy phase material are rotated and mixed in the mixing cavity one according to the inclined injection angle of the heavy phase material, meanwhile, the plurality of communication pipes one disturb the rotation of the liquid in the mixing cavity one, so as to eliminate the swirling and improve the mixing efficiency, and after the mixing of the materials, the materials overflow into the mixing cavity two from the communication pipe one; Step three: the catalyst is added into the mixing cavity two through the catalyst pipeline, the main sleeve rotates to drive the impeller group one to rotate, so as to stir the liquid in the mixing cavity two, so that the catalyst and the material mixing liquid are mixed in the mixing cavity two, so that the material reacts quickly, and the multiple impeller groups two disturb the vortex of the liquid in the mixing cavity two, so as to increase the mixing efficiency; Step four: the liquid mixture after reaction enters the conical part from the communication pipeline two, the heavier reaction products and the catalyst rotate along the inner wall of the conical part under the action of centrifugal force and move downward, the light phase product converges to the middle position of the conical part, and is extracted upward by the main sleeve, and the heavy phase product and the catalyst are discharged from the bottom end of the conical part.

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