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CN-122006644-A - Reactor for producing a catalyst

CN122006644ACN 122006644 ACN122006644 ACN 122006644ACN-122006644-A

Abstract

The invention belongs to the technical field of high polymer polymerization reactors, and relates to a reactor, which comprises a cylinder, an upper end enclosure and a lower end enclosure, wherein the upper end enclosure is arranged at the top of the cylinder, the lower end enclosure is arranged at the bottom of the cylinder, a tube array is arranged in the cylinder, the tube array comprises a central guide tube and a downtake tube, the central guide tube is used as an ascending channel after mixing polymer materials, catalysts and the polymer materials returned in the downtake tube, the downtake tube is arranged at the periphery of the central guide tube and is used for returning part of the polymer material mixture to the bottom of the reactor, and a chamfer structure is arranged at least at the top and/or the bottom of the downtake tube. The chamfer structure of the invention can enlarge the liquid receiving area of the orifice of the downcomer, reduce the turbulence of the reaction materials at the tube plate and balance the flow velocity of the materials in each downcomer.

Inventors

  • YANG JIANCHUN
  • ZHU RONGXIN

Assignees

  • 北京诺维新材科技有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (10)

  1. 1. The reactor is characterized by comprising a cylinder, an upper seal head and a lower seal head, wherein the upper seal head is arranged at the top of the cylinder, and the lower seal head is arranged at the bottom of the cylinder; The reactor comprises a cylinder body, a catalyst and a reactor, wherein a shell is arranged in the cylinder body, the shell comprises a central guide pipe and a downpipe, the central guide pipe is used as an ascending channel after mixing a polymer material, the catalyst and the polymer material returned in the downpipe, and the downpipe is arranged at the periphery of the central guide pipe and is used for returning part of the polymer material mixture to the bottom of the reactor; At least part of the top and/or bottom of the downcomer is provided with a chamfer structure.
  2. 2. The reactor of claim 1, wherein the chamfer structure is flared with a flared opening toward the upper or lower head.
  3. 3. The reactor according to claim 1 or 2, wherein the chamfer structure is provided in the upper head where the upper tube plate is connected to the down-flow tube and/or the chamfer structure is provided in the lower head where the lower tube plate is connected to the down-flow tube; preferably, the top of the chamfer structure is flush with the top of the upper tube sheet or the bottom of the lower tube sheet.
  4. 4. A reactor according to any one of claims 1 to 3, wherein the length a of the chamfer structure corresponding to the downcomer is half the clearance distance between adjacent downcomers; Preferably, when the downcomer is adjacent to more than one other downcomer, but there are a plurality of different tube bridge values, the value of a is calculated as half of the minimum tube bridge value.
  5. 5. The reactor according to any one of claims 1-4, wherein the depth b of the chamfer structure is 30-40% of the thickness of the respective upper and/or lower tube sheet.
  6. 6. The reactor according to any one of claims 1-5, wherein a propeller is provided inside the central draft tube.
  7. 7. The reactor according to any one of claims 1-6, wherein flow guiding means are provided in the upper and/or lower head.
  8. 8. Use of a polymerisation reactor as claimed in any of claims 1 to 7 in a polymerisation reaction.
  9. 9. Use according to claim 8, wherein the polymerization is a cationic polymerization, such as an olefin cationic polymerization.
  10. 10. The use according to claim 9, wherein the polymerization reactor is used for the cationic polymerization of olefins at-110 ℃ to 0 ℃.

Description

Reactor for producing a catalyst Technical Field The invention belongs to the technical field of polymer polymerization reactors, relates to a reactor, and particularly relates to a polymer polymerization reactor. Background The cationic polymerization of olefins is one of the important industrial processes for the preparation of synthetic rubber, for example the copolymerization of isobutylene and small amounts of isoprene to form copolymer butyl rubber, the combination of butyl rubber and halogen to form halogenated butyl rubber, both of which are important synthetic rubber varieties, being the main raw materials for the preparation of tires. The cationic polymerization reaction is intense, the heat release amount is large, the heat must be removed in time in the reaction process, the reaction temperature is controlled well, the ideal polymer product can be obtained, and the polymerization reactor for the cationic polymerization reaction used in industry is designed around the purpose. Representative polymerization reactors such as the butyl tube reactor of Exxon company is disclosed in patent document US5417930, the tube side is the polymerization reaction zone, the shell side is introduced with a refrigerant to remove the reaction heat, a propeller is arranged at the bottom of the reactor to push the reaction materials to flow upwards from a central pipeline, when the reaction materials reach the upper end enclosure, most of the materials are turned back to flow downwards from the pipelines around the reactor and flow into the bottom end enclosure, and after being mixed with fresh reaction materials, the mixture continues to flow upwards under the pushing of the propeller, so the mixture flows circularly, and part of the reaction materials are removed from the upper part of the reaction kettle. When materials are baffled in the upper end enclosure and the lower end enclosure, turbulent flow exists, the flow speed is unbalanced, and even dead flowing angles exist. Patent document CN103608100 discloses an improved tubular reactor, the diameter of the central guide pipe is increased, a guide device is arranged in the upper end enclosure and the lower end enclosure, and the problem of uneven circulation flow rate is greatly improved. Even so, the reaction mass still presents a flow obstruction when baffling from the central draft tube to the downcomer. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides the reactor, wherein a chamfer structure is arranged at the connection part of the tube array of the reactor and the upper tube plate and/or the lower tube plate, the chamfer structure can enlarge the liquid receiving area of the tube orifice of the downcomer, reduce the turbulence of reaction materials at the tube plate and balance the flow velocity of the materials in each downcomer. Specifically, the invention provides the following technical scheme: the reactor comprises a cylinder body, an upper sealing head and a lower sealing head, wherein the upper sealing head is arranged at the top of the cylinder body, and the lower sealing head is arranged at the bottom of the cylinder body; The reactor comprises a cylinder body, a catalyst and a reactor, wherein a shell is arranged in the cylinder body, the shell comprises a central guide pipe and a downpipe, the central guide pipe is used as an ascending channel after mixing a polymer material, the catalyst and the polymer material returned in the downpipe, and the downpipe is arranged at the periphery of the central guide pipe and is used for returning part of the polymer material mixture to the bottom of the reactor; At least part of the top and/or bottom of the downcomer is provided with a chamfer structure. According to an embodiment of the invention, the top and/or bottom of the down-flow pipe is provided with a chamfer structure. According to the embodiment of the invention, the chamfer structure is in a horn shape, and a horn-shaped opening faces to the upper seal head or the lower seal head. According to the embodiment of the invention, the chamfer structure is arranged in the upper end enclosure, and/or the chamfer structure is arranged in the lower end enclosure, and the lower tube plate is connected with the downflow pipe. According to an embodiment of the invention, the top of the chamfer structure is flush with the top of the upper tube sheet or the bottom of the lower tube sheet. According to the embodiment of the invention, the length a of the chamfer structure refers to the length of the chamfer structure along the diameter direction of the down-flow pipe, and the depth b of the chamfer structure refers to the length of the chamfer structure along the length direction of the down-flow pipe. According to the embodiment of the invention, the length a of the chamfer structure corresponding to the downflow pipe is half of the clearance distance between the adjacent downflow pipes (a pipe bridge refers to