Ultrasonic atomization micro-mixer, micro-channel reactor, prepolymerization system and para-aramid resin continuous polymerization reaction system and method

A technology of microchannel reactor and mixed reactor, which is applied in the field of chemical reaction system, can solve the problems of wide molecular weight distribution coefficient of para-aramid resin, poor uniformity of polymer molecular weight distribution, and inability to quickly and effectively transfer heat of reaction, so as to prevent Effects of implosion polymerization and low molecular weight by-products, enhanced stirring and mixing efficiency, and stable and controllable intrinsic viscosity

Pending Publication Date: 2019-12-24
惠生(中国)投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, p-phenylenediamine is easily oxidized and discolored, which not only affects the color of the final product, but also produces by-products during the polymerization process, which affects the final mechanical properties of the fiber.
In addition, in the prepolymerization stage, when the DMAc solution of p-phenylenediamine and molten terephthaloyl chloride are mixed in the No. 2 mixer, the exotherm is severe, and the heat of reaction cannot be transferred quickly and effectively. The high temperature at the moment of reaction leads to small molecule by-products And low molecular weight poly-p-phenylene terephthalamide molecules are generated, the final polymer molecular weight distribution uniformity is poor, and the molecular weight distribution coefficient of para-aramid fiber resin is relatively wide

Method used

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  • Ultrasonic atomization micro-mixer, micro-channel reactor, prepolymerization system and para-aramid resin continuous polymerization reaction system and method
  • Ultrasonic atomization micro-mixer, micro-channel reactor, prepolymerization system and para-aramid resin continuous polymerization reaction system and method
  • Ultrasonic atomization micro-mixer, micro-channel reactor, prepolymerization system and para-aramid resin continuous polymerization reaction system and method

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Embodiment 1

[0066] This embodiment is an embodiment of an ultrasonic atomizing micro-mixer, see for details figure 1 and image 3 .

[0067] Ultrasonic atomization micro-mixer, including a mixing reactor body 1 and an ultrasonic atomizer 21, the side lower part of the mixing reactor body 1 is connected with a first raw material inlet channel and a second raw material inlet channel; the ultrasonic atomization The device 21 acts in the first raw material inlet passage and the second raw material inlet passage for atomizing the first raw material and the second raw material; the upper end of the mixing reactor body 1 is provided with a first outlet; the The lower end of the mixing reactor body is provided with a second outlet.

[0068] The ultrasonic atomizer 21 in this application atomizes the raw material components, and the atomized raw materials enter the mixing reactor body 1, which increases the contact area between the two. In a specific embodiment, the ultrasonic atomizer 21 inclu...

Embodiment 2

[0084] Provided in this embodiment is an ultrasonic oscillation microchannel reactor, comprising a microchannel reactor body 6, an ultrasonic generator 22 and a cooling assembly 5;

[0085] Both ends of the microchannel reactor body 6 are respectively provided with an inlet and an outlet;

[0086] The cooling assembly 5 surrounds the periphery of the microchannel reactor body 6;

[0087] The ultrasonic generator 22 is wound around the cooling assembly 5 .

[0088] According to the ultrasonic oscillating microchannel reactor described above in the present invention, the cooling assembly 5 in this application is a cooling channel through which a cooling medium such as circulating water passes.

[0089] In a specific embodiment of the present application, the microchannel reactor body is a microchannel reactor core plate.

[0090] According to the specific solution above in this embodiment, there are multiple ultrasonic generators. The ultrasonic generator transmits the ultras...

Embodiment 3

[0092] This embodiment also discloses a pre-polymerization system, which includes an ultrasonic atomizing micro-mixer 7 and an ultrasonic oscillating micro-channel reactor 8 connected in sequence.

[0093] According to the pre-aggregation system described in this embodiment, the pre-aggregation system further includes several raw material storage devices respectively connected to the first raw material inlet channel and the second raw material inlet channel of the ultrasonic atomizing micro-mixer.

[0094] According to the prepolymerization system described in this embodiment, booster pumps are further provided on the first raw material inlet passage and the second raw material inlet passage.

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Abstract

The invention provides an ultrasonic atomization micro-mixer, an ultrasonic oscillation micro-channel reactor, a prepolymerization system and a para-aramid resin continuous polymerization reaction system and method. The ultrasonic atomization micro-mixer comprises a mixing reactor body and an ultrasonic atomizer. The side lower part of the mixing reactor body is connected with a first raw materialinlet channel and a second raw material inlet channel in a penetrating manner, The ultrasonic atomizer acts in the first raw material inlet channel and the second raw material inlet channel and is used for atomizing a first raw material and a second raw material. A first outlet is formed in the upper end of the mixing reactor body, and a second outlet is formed in the lower end of the mixing reactor body. According to the technical scheme, the problem that in the para-aramid resin preparation process, reaction heat in the pre-polymerization stage is difficult to remove, and consequently temperature rise is large is solved, implosion and generation of low-molecular-weight byproducts caused by local overheating of a reaction system are prevented, and it is guaranteed that the intrinsic viscosity of product resin is stable and controllable.

Description

technical field [0001] The invention relates to a chemical reaction system and method, in particular to a para-aramid resin continuous polymerization reaction system and method. Background technique [0002] Para-aramid fiber is poly-paraphenylene terephthalamide fiber, which is called aramid fiber 1414 in my country. It is one of the fastest-growing varieties of high-performance fibers today and is a high-tech product with excellent comprehensive performance. fiber. Para-aramid fiber has excellent properties such as high strength, high modulus, high temperature resistance, acid resistance, alkali resistance and low density. Its specific tensile strength is 8 times that of steel wire (≥5Gpa), and its specific modulus is 3~ 4 times (≥148Gpa), the decomposition strength is 550°C, the limiting oxygen index LOI is 29, the toughness is twice that of steel wire, and the density is only about 1 / 5 of steel wire. It can not only be used to make advanced composite materials such as r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/10B01J19/20B01J19/00C08G69/28C08G69/32
CPCB01J19/0013B01J19/002B01J19/0046B01J19/0093B01J19/10B01J19/20B01J2219/00085B01J2219/00094B01J2219/0099B01J2219/0871C08G69/28C08G69/32Y02P20/54
Inventor 高敬民吴煜
Owner 惠生(中国)投资有限公司
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