Method for synthesizing polyolefin from alpha-olefin prepared from coal and product

A technology of polyolefins and olefins, which is applied in the field of continuous synthesis of high molecular weight and high branched polyolefins from coal-based α-olefins, which can solve the problems of lack of process methods and achieve high-efficiency preparation, excellent olefin polymerization ability, and strong adaptability Effect

Active Publication Date: 2021-07-09
SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to overcome the lack of a process for continuously synthesizing high-molecular-weight and high-branched polyolefins from coal-based α-olefins in the prior art The defect of coal-based α-olefin continuous synthesis polyolefin method and product are provided

Method used

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  • Method for synthesizing polyolefin from alpha-olefin prepared from coal and product
  • Method for synthesizing polyolefin from alpha-olefin prepared from coal and product
  • Method for synthesizing polyolefin from alpha-olefin prepared from coal and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Preparation of Ziegler-Natta catalyst:

[0104] (1) Under the protection of nitrogen, add 12mmol of triethylaluminum (1M n-hexane solution) 12mL dropwise to 21mmol of anhydrous magnesium chloride in tetrahydrofuran suspension (2g / 50mL) under an ice-water bath, return to room temperature after the dropwise addition, After heating to 70°C to activate the reaction for 3 hours, let it stand still, absorb the tetrahydrofuran solution in the upper layer, and obtain a slurry liquid; wherein, the molar ratio of the magnesium halide and the alkylaluminum compound is 1:0.57;

[0105] (2) Add 0.6mL tetrafluoropropanol (6.72mmol) and 0.7mL (5.99mmol) hexafluorobutanol mixture to the above slurry, and mix and react at 70°C for 3 hours; wherein, the moles of magnesium halide and fluoroalcohol The ratio is 1:0.6

[0106] (3) Then add 30mL TiCl 4 (273.6mmol, the molar ratio of magnesium halide and transition metal compound is 1:13), reflux at 80°C for 5 hours, let stand to cool to ro...

Embodiment 2

[0108] Except that the fluoroalcohol of embodiment 1 is replaced by 0.6mL tetrafluoropropanol (6.72mmol), 0.6mL octafluoropentanol (4.31mmol), 0.6mL hexafluoromethylpentanol (4.23mmol), other parameters and The conditions were all carried out according to Example 1 (21 mmol anhydrous magnesium chloride), and the Ziegler-Natta catalyst was prepared. Among them, the molar ratio of magnesium halide and fluoroalcohol is 1:0.72

Embodiment 3

[0110] Preparation of Ziegler-Natta catalyst:

[0111] (1) Under the protection of nitrogen, add 12mL of triethylaluminum (1M n-hexane solution) dropwise to 12mmol (2g / 50mL) of 21mmol of anhydrous magnesium chloride in n-hexane suspension in ice-water bath, return to room temperature after the dropwise addition , after being heated to 70°C for 3 hours to activate the reaction, let it stand, and after sucking off the n-hexane solution in the upper layer, wash it three times with 50mL of n-hexane (anhydrous treatment) respectively to obtain a slurry; wherein, the magnesium halide and the alkylaluminum compound The molar ratio is 1:0.57;

[0112] (2) Add 0.6mL trifluoroethanol (7.95mmol), 0.6mL hexafluoropentanol (4.54mmol), 0.6mL hexafluoroisopropanol (5.70mmol) mixed solution to the above slurry, mix and react at 70°C for 3 hours , wash the slurry with n-hexane (anhydrous treatment); wherein, the molar ratio of magnesium halide and fluoroalcohol is 1:0.86;

[0113] (3) Then a...

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Abstract

The invention provides a method for synthesizing polyolefin from alpha-olefin prepared from coal and a product. The method comprises the following step: under the action of a catalyst containing a fluorinated alcohol load and a cocatalyst, carrying out polymerization reaction on the alpha-olefin prepared from the coal. The catalyst containing the fluorinated alcohol load takes magnesium halide as a carrier, an aluminum alkyl compound as an activating agent and fluorinated alcohol as an electron donor to load a transition metal compound; and the fluorinated alcohol is an aliphatic fluorine-containing alcohol compound or monohydric alcohol. The polymerization method disclosed by the invention can be used for mildly and efficiently polymerizing C5 and above alpha-olefin to obtain high-molecular-weight and high-branching-degree polyolefin, the method is simple to operate, and the product is easy to obtain. According to the method disclosed by the invention, the alpha-olefin prepared from coal is used as a raw material, a single component does not need to be separated, only simple treatment is needed, the weight-average molecular weight of the obtained product is not less than 150 thousand Daltons, and the branching degree is not less than 30 branched chains / 1000C.

Description

technical field [0001] The present invention relates to the technical field of preparing polyolefins with high molecular weight and high degree of branching by polymerization of α-olefins, in particular to a process for continuously synthesizing polyolefins with high molecular weight and high degree of branching from coal-based α-olefins in Fischer-Tropsch synthesis co-production methods and products. Background technique [0002] With the deepening of the concept of environmental protection, people's awareness of environmental protection is getting stronger and stronger, and the market for polyolefins is also growing. Because polyolefin is environmentally friendly, it is regarded as the most ideal new polymer material, and it is widely used in the electronics industry, agriculture and forestry fields, medical fields, automotive fields, communication fields, processing fields, etc. [0003] On the other hand, in order to promote oil substitution, alleviate the contradiction...

Claims

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Application Information

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IPC IPC(8): C08F210/14C08F4/649
CPCC08F210/14C08F4/6494C08F2500/01
Inventor 姜标曹星欣姜海霞刘俊义邢萍李金华
Owner SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
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