System for improving molecular weight distribution of middle-molecular polyisobutene

A technology of molecular weight distribution and polyisobutylene, which is applied in the direction of feeding devices, chemical/physical/physical chemical processes, chemical instruments and methods, etc., can solve the problems of restricting the development of polyisobutylene industry and the inability of products to enter the international high-end application market, etc. To achieve the effect of improving the catalytic effect and reducing the reaction temperature

Pending Publication Date: 2021-11-05
SHANDONG HONGRUI NEW MATERIAL TECH
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Problems solved by technology

Molecular weight distribution is the main quality indicator reflecting medium molecular weight polyisobutylene products, the narrower the distribution the better, currently, the world leader in polyisobutylene production is BASF in Germany, and the molecular weight distribution of it

Method used

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  • System for improving molecular weight distribution of middle-molecular polyisobutene
  • System for improving molecular weight distribution of middle-molecular polyisobutene
  • System for improving molecular weight distribution of middle-molecular polyisobutene

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Example Embodiment

[0024] Example 1, such as Figure 1 ~ 5 As shown, the present embodiment is intended to provide a molecular weight distribution improvement system in which the molecular polyisobutylene molecular weight is distributed, and the molecular weight of the medium polyisobutylene molecular weight is distributed over 3.5 or less. In this regard, the present embodiment from three angles to existing technologies Performance: 1 The raw material mixture is mixed more uniform, and the catalytic effect of the auxiliary catalyst; 3, isobutylene polymerization belongs to the cationic polymerization reaction, which is characterized by fast polymerization speed and instant release a large amount of reaction heat. The polymerization needs to be carried out at low temperatures. If the heat is not quickly removed, the polymer molecular chain will be shorter, and the small molecular weight product is large, and the degree of demand, even the polymerization can not be completed, and the heat accumulation...

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Abstract

The invention relates to the technical field of production and application of polyisobutene, and in particular, relates to a system for improving molecular weight distribution of middle-molecular polyisobutene. The system comprises a raw material deep freezer, a catalyst tank and a polymerization reaction kettle; the raw material deep freezer is communicated with the polymerization reaction kettle through a raw material pipe, the catalyst tank is communicated with the polymerization reaction kettle through a catalyst pipe, and a homogenizing pump is further communicated between the raw material deep freezer and the catalyst tank. By addition with a homogeneous pump, the combination of raw materials and catalysts is effectively improved; the catalytic effect is effectively improved by arranging a traditional one-way catalyst into a two-way catalyst; the reaction temperature of the polymerization reaction kettle is effectively reduced by arranging an external circulation heat exchanger, the problems of short polymer molecular chains, more small-molecular-weight products and failing to meet the requirement of the required polymerization degree caused by the fact that heat cannot be removed are solved, and the molecular weight distribution of a polyisobutene product is effectively controlled to be 3.5 or below.

Description

Technical field [0001] The present invention relates to the technical field of polyisobutylene production applications, and in particular, a molecular weight distribution improvement system for molecular polyisobutylene. Background technique [0002] Polyisobutylene (referred to as PIB) is a colorless, tasteless, non-toxic viscous or semi-solid material having good heat resistance, oxygen, ozone, chemical resistant, resistant to ultraviolet, acid, and alkali resistance. The volume resistivity is high, small expansion coefficient, no electrical harmful substance, excellent electrical insulation, no residual charcoal, etc. In addition to widely used in lubricating oil additives, petroleum additives, putty glue adhesives, chewing gum additives and electrical insulation In addition, it is also used in the fields of high polymers such as rubber, and the development and utilization prospects are very broad. [0003] In general, polyisobutylene is divided into low molecule polyisobutyle...

Claims

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Application Information

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IPC IPC(8): B01J19/18B01J19/00B01J4/00C08F110/10
CPCB01J19/18B01J19/0013B01J4/001C08F110/10C08F2/01
Inventor 张毅鸿李红颜明史永波程伟
Owner SHANDONG HONGRUI NEW MATERIAL TECH
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