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Preparation system and preparation method for polyisobutylene

A polyisobutene and preparation system technology, applied in the field of chemical technology and equipment, can solve the problems of uncontrollable molecular weight of product polyisobutene, affecting product quality and use, large molecular weight distribution index, etc., and achieving uniform, stable and adjustable reaction temperature and structure. Simple, molecular weight controllable effect

Inactive Publication Date: 2014-03-19
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Summarize the existing polyisobutylene production and published patents. The reactors used have different degrees of complex structure, difficult processing, and unfavorable large-scale production.
In addition, although the above-mentioned reaction device can remove the heat of reaction, the molecular weight of the product polyisobutene is uncontrollable and the molecular weight distribution index is large, which not only increases the difficulty of product separation, increases energy consumption, but also affects product quality and use.

Method used

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  • Preparation system and preparation method for polyisobutylene
  • Preparation system and preparation method for polyisobutylene
  • Preparation system and preparation method for polyisobutylene

Examples

Experimental program
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preparation example Construction

[0042] The static mixing tubular polymerization reactor 9 described in the preparation system of this polyisobutylene is Figure 4 The several layers shown are arranged in a horizontal serpentine form from bottom to top or Figure 5 The tubular structure shown in several rows of vertical serpentine arrangements is made of ordinary carbon steel; the diameter and length of the tube are adjusted and determined according to the residence time and output required for the reaction. The inner diameter of the tube ranges from 20mm to 150mm and the length ranges from 100m ~800m, the wall thickness is 2.5mm, so that the residence time of the reaction material in the tubular reactor is 1min~35min. The inside of the static mixing tubular polymerization reactor 9 adopts a static mixer mixing unit structure, and the specific form can be any one of SK type, ISG type, LPD type and SV type; the static mixer mixing unit structure makes the reaction fluid Cutting, shearing, rotating and re-mixi...

Embodiment 1

[0051] Embodiment 1: The preparation method of the present polyisobutylene The specific process is as follows.

[0052] use figure 1 The preparation system of polyisobutylene shown in the reaction, the constant temperature brine bath is a square storage tank, the size is: length 1m, width 1m, height 2m, the static mixing tubular polymerization reactor immersed in the constant temperature brine bath is a horizontal coil , The material is Teflon tube (teflon tube), the inner diameter of the coil is 20mm, the length of the tube is 800m, and the coiling method is a multi-layer circular spiral rise.

[0053] At 200kPa, add brine solution into the constant temperature brine bath 8, and start an external refrigerator to cool the brine, so as to control the reaction temperature to 0°C. Into the isobutylene cooler 3, feed the brine cooled by an external freezer, start the raw material delivery pump 2, 3 The flow rate of / h is from the isobutene storage tank 1 to the tube side of the ...

Embodiment 2

[0055] Embodiment 2: The preparation method of the present polyisobutylene The specific process is as follows.

[0056] In the preparation system of polyisobutylene, the constant temperature brine bath is a square storage tank with a size of 1.5m in length, 1.5m in width and 2m in height. The static mixing tubular polymerization reactor submerged in the constant temperature brine bath is a horizontal surrounding coil, and the material is Teflon tube (teflon tube), the inner diameter of the coil is 20mm, the length of the total pipe is 800m, the coiling method is a multi-layer circular spiral rise, and the number of parallels is 2.

[0057] At 200kPa, a saline solution was added to the thermostatic brine bath 8, and an external refrigerator was started to cool the brine, so as to control the reaction temperature to -5°C. Into the isobutylene cooler 3, feed the brine cooled by an external freezer, start the raw material delivery pump 2, 3 The flow rate of / h is from the isobute...

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Abstract

The invention discloses a preparation system and a preparation method for polyisobutylene. The system comprises an isobutylene storage tank, a catalyst storage tank, a termination agent storage tank, a rapid mixer, a static mixing tube type polymerization reactor and a rapid reaction termination mixer. The isobutylene storage tank is connected to an isobutylene cooler through a pipeline and a raw material delivery pump. The isobutylene cooler is in pipeline connection with a raw material inlet of the rapid mixer. The catalyst storage tank is connected to the catalyst inlet of the rapid mixer through a pipeline and a catalyst metering pump. The outlet of the rapid mixer is communicated with the inlet of the static mixing tube type polymerization reactor, the outlet of which is communicated with the reaction feed inlet of the rapid reaction termination mixer. The termination agent storage tank is connected to the termination agent inlet of the rapid reaction termination mixer through a pipeline and a termination agent delivery pump. The static mixing tube type polymerization reactor is located in a constant temperature brine bath groove. The system provided by the invention has the advantages of uniform reaction temperature, narrow molecular weight distribution of polyisobutylene, and controllable molecular weight, etc.

Description

technical field [0001] The invention belongs to the technical field of chemical technology and equipment, in particular to a preparation system and method of polyisobutylene. Background technique [0002] Polyisobutylene (PIB) is a typical linear polymer obtained by cationic polymerization of monomer isobutylene (IB). The isobutylene polymerization reaction equation is as follows: [0003] [0004] The molecular structure of PIB is a long-chain polymer with a methyl side chain and a double bond at the end. It has relative inertness, chemical stability and excellent unique properties such as ozone resistance, ultraviolet resistance, corrosion resistance and electrical insulation; PIB presses Depending on the degree of polymerization n, it is divided into low molecular weight polyisobutene (molecular weight between 350 and 3500), medium molecular weight polyisobutene (molecular weight between 10,000 and 100,000), and high molecular weight polyisobutene (molecular weight be...

Claims

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Application Information

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IPC IPC(8): C08F10/10C08F2/01
Inventor 赵风云刘亚青崔蕊李飞龙段晓宇张丽喆
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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