Search

CN-122006630-A - Mixing reactor, application and preparation method of hydroxypropyl methacrylate

CN122006630ACN 122006630 ACN122006630 ACN 122006630ACN-122006630-A

Abstract

The application discloses a mixing reactor, application and a preparation method of hydroxypropyl methacrylate. The mixing reactor comprises a reaction tube body, a sieve plate and a stirring part, wherein a feed inlet and a discharge outlet are respectively arranged at the front end and the rear end of the reaction tube body along the axial direction of the reaction tube body, a plurality of sieve plates are arranged in the reaction tube body along the axial direction at intervals, the distance between every two adjacent sieve plates is adjustable, the stirring part comprises a stirring shaft and stirring paddles, the stirring shaft extends along the axial direction of the reaction tube body, a plurality of stirring paddles are connected to the stirring shaft, at least two stirring paddles are arranged between every two adjacent sieve plates, and the distance between the stirring paddles between every two adjacent sieve plates is adjustable. The application can promote the flow field in the pipe to be more efficient and reasonable while considering the reaction condition, can save the volume of the reactor, lighten the stirring pressure, reduce the energy consumption, improve the heat transfer and stirring effect of the reactor and improve the product quality.

Inventors

  • LIU YI
  • FU CHAO
  • LIU PENG
  • LIU XINLEI

Assignees

  • 万华化学集团股份有限公司

Dates

Publication Date
20260512
Application Date
20241112

Claims (10)

  1. 1. The utility model provides a mixing reactor, its characterized in that, includes reaction tube body, sieve and stirring part, the reaction tube body is provided with feed inlet and discharge gate respectively along its axial direction's both ends, be provided with a plurality of along axial direction interval in the reaction tube body the sieve, adjacent interval between the sieve is adjustable, stirring part includes (mixing) shaft and stirring paddle, the (mixing) shaft is along the axial direction of reaction tube body extends, be connected with a plurality of stirring paddle on the (mixing) shaft, and adjacent all have two at least stirring paddle between the sieve, adjacent interval between the stirring paddle between the sieve is adjustable.
  2. 2. The mixing reactor according to claim 1, wherein the aspect ratio of the reaction tube is 2 to 10.
  3. 3. The mixing reactor according to claim 1, wherein the spacing between adjacent screen plates is 400mm to 1500mm.
  4. 4. The mixing reactor according to claim 1, wherein the aperture ratio of the sieve plate is 0.5% -30%, the aperture diameter of the sieve plate is 6 mm-100 mm, and the sieve plates with different aperture diameters can be replaced in the reaction tube body according to the viscosity of the reactant.
  5. 5. The mixing reactor according to claim 1, wherein the reaction tube body comprises a housing and a tube shell, the housing is sleeved on the tube shell, a gap is arranged between the housing and the tube shell, the reaction tube body is provided with a medium inlet and a medium outlet, the medium inlet is used for inputting heating medium and/or heat preservation medium into the gap between the housing and the tube shell, and the medium outlet is used for outputting heating medium and/or heat preservation medium into the gap between the housing and the tube shell.
  6. 6. The mixing reactor of claim 5, further comprising a baffle disposed in the gap between the housing and the shell and dividing the space between the housing and the shell into a plurality of separate chambers, each separate chamber being provided with a heating medium and/or a thermal insulation medium inlet and a medium outlet, respectively, to enable separate chambers to be capable of controlling different reaction temperatures.
  7. 7. The mixing reactor according to any one of claims 1-6, further comprising a distributor for dispersing materials, wherein the distributor is disposed in the reaction tube and is located at the feed inlet.
  8. 8. Use of a mixing reactor according to any one of claims 1 to 7 in organic chemical synthesis.
  9. 9. A method for preparing hydroxypropyl methacrylate, characterized in that the mixing reactor according to any one of claims 1 to 7 is used, comprising the steps of: mixing methacrylic acid and propylene oxide, feeding through a feed inlet of the reaction tube body, and adding a catalyst into the reaction tube body; Controlling the temperature in the reaction tube body to be 50-110 ℃ and And controlling the stirring part to rotate, and discharging the reactant obtained by the reaction from the discharge port.
  10. 10. The method for preparing hydroxypropyl methacrylate according to claim 9, wherein the molar ratio of methacrylic acid to propylene oxide is 1:1-1:20, preferably 1:1-1:10.

Description

Mixing reactor, application and preparation method of hydroxypropyl methacrylate Technical Field The application relates to the technical field of chemical production, in particular to a mixing reactor, application and a preparation method of hydroxypropyl methacrylate. Background In chemical production, most of the existing reactors are tubular reactors and kettle reactors, and in polymer production, extrusion type devolatilization reactors are also included. The reactor has certain disadvantages, such as large back mixing of the kettle type reactor, long reaction time in some reactions with serious tailing, increased manufacturing cost, difficult back mixing in actual production and reflux among sieve plates for the traditional tubular type reactor, adverse to some systems requiring uniform product distribution, difficult accurate temperature control for the tubular type reactor, and low pushing effect and high energy consumption for the extrusion type reactor mainly used for polymers with high viscosity when the polymer viscosity is low. Disclosure of Invention Based on this, it is necessary to provide a mixing reactor. The mixing reactor has reasonable structure, can improve the heat transfer and stirring effects of the reactor, improves the product quality, and can be widely applied to the production of chemical products. An embodiment of the present application provides a mixing reactor. The utility model provides a mixing reactor, includes reaction tube body, sieve and stirring part, both ends are provided with feed inlet and discharge gate respectively around along its axial direction on the reaction tube body, be provided with a plurality of along axial direction interval in the reaction tube body the sieve, adjacent interval between the sieve is adjustable, stirring part includes (mixing) shaft and stirring paddle, the (mixing) shaft is along the axial direction of reaction tube body extends, be connected with a plurality of stirring paddle on the (mixing) shaft, and adjacent all have two at least stirring paddle between the sieve between the stirring paddle, adjacent interval between the stirring paddle between the sieve is adjustable. In some embodiments, the aspect ratio of the reaction tube is 2-10. In some embodiments, the distance between adjacent sieve plates is 400 mm-1500 mm. In some embodiments, the aperture ratio of the sieve plate is 0.5% -30%, the aperture diameter of the sieve plate is 6 mm-100 mm, and the sieve plates with different aperture diameters can be replaced in the reaction tube body according to the viscosity of the reactant. In some embodiments, the reaction tube body comprises a shell and a tube shell, the shell is sleeved on the tube shell, a gap is arranged between the shell and the tube shell, the medium inlet is used for inputting heating medium and/or heat preservation medium into the gap between the shell and the tube shell, and the medium outlet is used for outputting heating medium and/or heat preservation medium into the gap between the shell and the tube shell. In some embodiments, the mixing reactor further comprises a partition plate disposed in the gap between the housing and the shell and tube, the partition plate dividing the space between the housing and the shell and tube into a plurality of independent chambers, each independent chamber being provided with a heating medium and/or a thermal insulation medium inlet and a medium outlet, respectively, to enable the independent chambers to be capable of controlling different reaction temperatures. In some of these embodiments, the mixing reactor further comprises a distributor for dispersing the material, the distributor being disposed within the reaction tube and at the feed inlet. The embodiment of the application also provides the application of the mixing reactor in organic chemical synthesis. The embodiment of the application also provides a preparation method of the hydroxypropyl methacrylate. The preparation method of the hydroxypropyl methacrylate adopts the mixing reactor and comprises the following steps: Mixing methacrylic acid and propylene oxide, feeding through a feed inlet of a reaction tube body, and adding a catalyst into the reaction tube body; Controlling the temperature in the reaction tube body to be 50-110 ℃ and And controlling the stirring part to rotate, and discharging the reactant obtained by the reaction through a discharge hole. In some embodiments, the molar ratio of methacrylic acid to propylene oxide is 1:1 to 1:20, preferably 1:1 to 1:10. The mixing reactor can be suitable for the fields of medium-low viscosity polymer production and chemical reaction synthesis almost without viscosity change, can promote more efficient and reasonable flow field in a pipe while considering reaction conditions, can save the volume of the reactor, lighten stirring pressure, reduce energy consumption, improve the heat transfer and stirring effect of the reactor and improve the product quality, an