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A kind of aluminum trichloride catalyst system and its method for producing low molecular weight polyisobutylene

A technology of aluminum trichloride and low molecular weight, applied in the direction of physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve unfavorable environmental protection, environmental pollution, preparation process, etc. Complexity and other problems, to achieve the effect of easy operation, easy polymerization reaction and simple preparation process

Active Publication Date: 2017-05-31
SHANDONG HONGRUI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN101033275A adopts AlCl 3 The catalyst is composed of nitrogen-containing, phosphorus-containing or oxygen-containing organic compound complexing agent, and the CN101293935A catalyst adopts AlCl 3 or TiCl 4 The main catalyst forms complex ion pairs with halogenated alkanes and organic solvents. The organic solvents are aromatic hydrocarbons or acetone. CN87103538 uses a catalyst prepared from aluminum trichloride and the second component of aromatic hydrocarbons, the third component of halogenated alkanes or halogens or water Solution, what CN1353123A adopted is the complex catalyst system prepared by aluminum trichloride and the second component aromatic hydrocarbon, the third component acid or acid anhydride, all added other organic compounds in the catalyst system in the above-mentioned technology, the preparation process is complicated, It has certain pollution to the environment and is not conducive to environmental protection. It is used in the production of polyisobutene, which will have a certain impact on the quality indicators and performance of the product polyisobutene and its by-product isobutylene oligomers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 700 kg of isobutylene oligomers to the catalyst preparation tank, start stirring, add 300 kg of anhydrous aluminum trichloride powder, and continue stirring for 30 minutes to obtain a catalyst suspension in which anhydrous aluminum trichloride is dispersed in isobutylene oligomers;

[0032] The average particle size of anhydrous aluminum trichloride powder is 120 μm;

[0033] A mixed C4 raw material with an isobutylene content of 55% (weight) is continuously added to the reactor. The water content of the mixed C4 raw material is 70ppm, and the feed flow rate is 2200kg / h. At the same time, the aluminum trichloride catalyst is continuously added to suspend Liquid, the feed flow rate is 12kg / h, the temperature of the polymerization reaction liquid in the control reactor is 5°C, the pressure is 0.4MPa, and the reaction time is 25 minutes. The mixed material is continuously discharged from the product outlet of the reactor, and continuously Add sodium hydroxide aqueous s...

Embodiment 2

[0040] The same equipment and process technology as in Example 1, the difference is that the feed flow rate of the aluminum trichloride catalyst suspension in the reactor is 10kg / h, the temperature of the polymerization liquid in the reactor is 0 ° C, and the vacuum degree in the product refining process is 1.6Kpa; the obtained product low molecular weight polyisobutylene number average molecular weight is 1300, the molecular weight distribution index is 1.9, and the conversion rate of isobutylene is 97%;

[0041] The number-average molecular weight of the by-product heavy component oligomer that comes out is the isobutylene oligomer is 310, and the total output amount is 30kg / h;

Embodiment 3

[0043] The same equipment and technology as in Example 1, the difference is that the flow of continuously adding mixed carbon four raw materials in the reactor is 1900kg / h, the flow of the aluminum trichloride catalyst suspension is 7kg / h, and the flow rate of the reactor polymerization liquid The temperature is -8°C, and the reaction time is 30 minutes;

[0044] The amount (weight) of the terminator sodium hydroxide aqueous solution in terms of sodium hydroxide is 0.155kg / h;

[0045] The flow rate of each level of water for three-level washing is 2850kg / h;

[0046] The precipitation process controls the temperature at 120°C and the pressure at 0.06MPa;

[0047] In the refining process of low molecular weight polyisobutylene products, the temperature is 150°C and the vacuum degree is 1.2KPa;

[0048] The number-average molecular weight of the obtained product low-molecular-weight polyisobutene is 2300, the molecular weight distribution index is 1.8, and the conversion rate o...

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Abstract

The invention discloses an aluminum trichloride catalyst system and a method for producing low-molecular-weight polyisobutene with the same and relates to a catalyst system and a method for producing polyisobutene with the same. The aluminum trichloride catalyst system is prepared from raw materials in parts by weight as follows: 5-50 parts of anhydrous aluminium trichloride powder and 50-95 parts of an isobutylene oligomer. The aluminum trichloride catalyst system is free of foreign organic matters and environmental pollution; the aluminum trichloride catalyst system has high adaptability to the raw materials and is used for polymerization production of the low-molecular-weight polyisobutene from an isobutylene-containing mixed C4 raw material, the required low-molecular-weight polyisobutene can be obtained, the low-molecular-weight polyisobutene product is high in purity and free of other organic matter residues, and an isobutylene oligomer byproduct can also be obtained.

Description

technical field [0001] The invention relates to a catalyst system and a method for producing polyisobutene, in particular to an aluminum trichloride catalyst system and a method for producing low molecular weight polyisobutene. Background technique [0002] Polyisobutene is a polymer with a wide range of uses. According to the molecular weight, it can be divided into low molecular weight polyisobutene, medium molecular weight polyisobutene and high molecular weight polyisobutene. Among them, low molecular weight polyisobutene is usually polyisobutene with index average molecular weight of 500-5000. Widely used in lubricating oil additives, insecticides, electrical cable insulation oil, sealing putty, adhesives, plasticizers, etc. Most of the current production technology of polyisobutylene is based on Lewis acid catalyst system, the proton donor is the co-catalyst, and the two form a complex to release H + Or carbocations initiate the polymerization of isobutene. Among the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/26B01J27/125C07C2/22C07C11/21C08F10/10C08F4/14C08F6/00
Inventor 张毅鸿宋毅光刘爱平颜明李长振
Owner SHANDONG HONGRUI NEW MATERIAL TECH
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