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Poly-1-butene and its preparation method

A technology of butene and gas phase polymerization, which is applied in the field of poly-1-butene preparation, can solve the problems of high ash content, difficulty in realizing poly-1-butene gas-phase continuous polymerization, low standard, etc., and achieve the effect of high activity

Active Publication Date: 2018-05-15
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to solve the defects of low isotacticity and high ash content of poly-1-butene synthesized in the prior art and the difficulty in realizing poly-1-butene gas phase continuous polymerization, thereby providing a preparation method of poly-1-butene , and the polybutene-1 produced by this method

Method used

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  • Poly-1-butene and its preparation method

Examples

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preparation example Construction

[0014] The invention provides a method for preparing poly-1-butene, wherein the method comprises: continuously feeding an olefin polymerization catalyst system and a monomer containing 1-butene into a gas-phase polymerization reactor under olefin polymerization conditions, and carrying out Gas-phase continuous polymerization reaction, and discharge the material after continuous polymerization reaction from the gas-phase polymerization reactor; the olefin polymerization conditions include: temperature is 60-85°C, pressure is 0.3-1.5MPa; the monomer containing 1-butene The residence time in the gas phase polymerization reactor is 30-120 minutes; the 1-butene-containing monomer contains 60-100 mole % of 1-butene.

[0015] The inventors of the present invention have found in research that when the temperature of the polymerization reaction of the monomer containing 1-butene is 60-85°C and the pressure is 0.3-1.5MPa, the residence time of the monomer in the gas phase polymerization ...

Embodiment 1

[0052] This example is used to illustrate the polybutene-1 and the preparation method according to the present invention.

[0053] Continuously feed the catalyst solid component at 0.61g / h for 50m 3 In the continuous horizontal stirred-bed gas-phase reactor, add triethylaluminum continuously with the pump, its addition makes the molar ratio Al / Ti=50 of the aluminum in the triethylaluminum and the titanium in the catalyst solid component, add continuously Diisopropyldimethoxysilane external electron donor (wherein the molar ratio of external electron donor to titanium in the catalyst solid component is Si / Ti=10). Then, feed 1-butene and hydrogen into the reactor to carry out polymerization reaction, wherein the pressure in the reactor is 1.1MPa, the temperature in the reactor is 65°C, the hydrogen / 1-butene in the reactor Molar ratio (H 2 / C 4 ) is 0.008, the average residence time of 1-butene and hydrogen in the reactor is 60min, and the reactor level is 40%.

[0054] Durin...

Embodiment 2

[0056] This example is used to illustrate the polybutene-1 and the preparation method according to the present invention.

[0057] Continuously feed the catalyst solid component at 0.61g / h for 50m 3 In the continuous horizontal stirred-bed gas-phase reactor, add triethylaluminum continuously with the pump, its addition makes the molar ratio Al / Ti=50 of the aluminum in the triethylaluminum and the titanium in the catalyst solid component, add continuously Diisopropyldimethoxysilane external electron donor (wherein the molar ratio of external electron donor to titanium in the catalyst solid component is Si / Ti=20). Then, feed 1-butene and hydrogen into the reactor to carry out polymerization reaction, wherein the pressure in the reactor is 1.3MPa, the temperature in the reactor is 75°C, the hydrogen / 1-butene in the reactor Molar ratio (H 2 / C 4 ) is 0.008, the average residence time of 1-butene and hydrogen in the reactor is 60min, and the reactor level is 40%.

[0058] Durin...

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Abstract

The invention discloses a poly-1-butene and a preparation method thereof. The method comprises: continuously feeding an olefin polymerization catalyst system and a monomer containing 1-butene into a gas-phase polymerization reactor under olefin polymerization conditions, and performing gas-phase continuous polymerization reaction, and discharge the material after the continuous polymerization reaction from the gas phase polymerization reactor; the olefin polymerization conditions include: the temperature is 60-85°C, and the pressure is 0.3-1.5MPa; the monomer containing 1-butene is The residence time in the gas phase polymerization reactor is 30-120 minutes; the monomer containing 1-butene contains 60-100 mole percent 1-butene. The poly-1-butene prepared by the invention has higher isotacticity (above 97%) and lower ash content, and the melting point of the poly-1-butene is higher than 110 DEG C, which is suitable for the preparation of pipes.

Description

technical field [0001] The invention relates to a method for preparing poly-1-butene and poly-1-butene prepared by the method. Background technique [0002] Poly 1-butene (1-PB) has outstanding creep resistance, environmental stress crack resistance, abrasion resistance, windability and good mechanical properties, and it is different from other plastics (such as, PVC, CPVC, HDPE, PP Compared with cross-linked PE, etc.), it can be used below 90°C for a long time and short-term use at 105-110°C. Based on the above characteristics, poly-1-butene is suitable for pipes, food films and sheets, and can even be used for hot and cold water pipes for domestic water and pipes for direct drinking water projects to ensure that the water quality has no secondary pollution. In addition, compared with metal pipes, the energy consumption per unit volume of poly-1-butene pipes is only 1 / 8 and 1 / 4 of steel and aluminum respectively, and poly-1-butene pipes can avoid metal pipes from rusting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/08C08F2/34C08F2/38
Inventor 谷汉进赵丽梅李化毅王素玉成卫戍张丁赵春红苏海李倩郑涛
Owner CHINA PETROLEUM & CHEM CORP
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