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 th

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
Comparison scheme
Effect test

Example Embodiment

[0042] The static mixing tubular polymerization reactor 9 in the preparation system of the polyisobutylene is Figure 4 The several levels shown are arranged in a horizontal serpentine form from bottom to top or Figure 5 The shown tubular structure arranged in several rows of vertical serpentines is made of ordinary carbon steel; the diameter and length of the pipe are adjusted and determined according to the residence time and output required for the reaction. The inner diameter of the pipe 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 Produce cutting, shearing, rotation and re-mixing, rea...

Example Embodiment

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

[0052] use figure 1 The polyisobutylene preparation system shown is used for the reaction. The thermostatic salt water bath is a square storage tank with a size of 1m in length, 1m in width, and 2m in height. The static mixing tube polymerization reactor immersed in the thermostatic salt water bath is a horizontally surrounding coil. , The material is Teflon tube (teflon tube), the inner diameter of the coil is 20mm, the tube length is 800m, and the coiling method is a multi-layer circular spiral.

[0053] Under 200 kPa, the salt solution was added to the constant temperature salt water bath 8, and the external freezer was started to cool the salt water to control the reaction temperature to 0°C. Pass the brine cooled by the external refrigerator into the isobutylene cooler 3, start the raw material delivery pump 2, and set a 0.5m 3 The flow rate of / h is input from the pipe sid...

Example Embodiment

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

[0056] The thermostatic salt water bath in the polyisobutylene preparation system is a square storage tank with a size of 1.5m in length, 1.5m in width, and 2m in height. The static mixing tube polymerization reactor immersed in the thermostatic salt water bath is a horizontal surrounding coil, made of Teflon tube (teflon tube), the inner diameter of the coil is 20mm, the total tube length is 800m, the coiling method is a multi-layer circular spiral rising, and the number of parallels is 2.

[0057] Under 200 kPa, add brine solution to the constant temperature brine bath 8, and start the external refrigerator to cool the brine to control the reaction temperature to -5°C. Pass the brine cooled by the external refrigerator into the isobutylene cooler 3, start the raw material transfer pump 2, and set the temperature to 0.6m 3 / h flow rate from the isobutylene storage tank 1 to the...

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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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