Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of olefin polymerization catalyst and olefin polymerization method and polyolefin

An olefin polymerization and catalyst technology, applied in the field of polyolefins, can solve the problems of ineffective regulation of the comonomer ratio, high price, and increased cost of polymerization products, etc.

Active Publication Date: 2016-12-07
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the catalyst can be used to achieve the copolymerization of ethylene and olefins with polar functional groups, but the proportion of comonomer in the obtained polymer is only 3%, which cannot effectively control the proportion of comonomer in the polymer
In addition, when using salicylaldimine-based catalyst precursors for catalytic polymerization, expensive methylalumoxane or borides are often added as cocatalysts, which increases the cost of preparing polymeric products

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of olefin polymerization catalyst and olefin polymerization method and polyolefin
  • A kind of olefin polymerization catalyst and olefin polymerization method and polyolefin
  • A kind of olefin polymerization catalyst and olefin polymerization method and polyolefin

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0035] This preparation example is used to illustrate the salicylaldimine catalyst precursor represented by formula (II) provided by the present invention and its preparation method.

[0036] Dissolve 3-methyl-(E)-salicylaldehyde pentafluoroaniline (1mol) in ether and cool to -78°C, then add a hexane solution of n-butyllithium (1.05mol), and react at this temperature 2h, then raise the temperature to 30°C for another 15min, then transfer it to -78°C TiCl 4 (0.5mol) of tetrahydrofuran solution and react for half an hour, return to room temperature at 30°C and react for 16 hours, filter and remove the solvent, and then use a mixed solvent of petroleum ether and dichloromethane (the volume of petroleum ether and dichloromethane The ratio is 4:1, the same below) to obtain a reddish-brown product by recrystallization with a yield of 90%.

[0037] Anal.Calc.for C 28 h 14 Cl 2 f 10 N 2 o 2 Ti (%): C, 46.76; H, 1.96; N, 3.90. Found (%): C, 46.70; H, 1.94; N, 3.87. FD-MS: m / z 7...

preparation example 2

[0039] This preparation example is used to illustrate the salicylaldimine catalyst precursor represented by formula (III) provided by the present invention and its preparation method.

[0040] 3,5-Dimethyl-(E)-salicylaldehyde aniline (1mol) was dissolved in ether and cooled to -78°C, then a hexane solution of n-butyllithium (1.05mol) was added, at this temperature React for 2h, then raise the temperature to 30°C for another 15min, then transfer it to -78°C TiCl 4 (0.5mol) THF solution and reacted for half an hour, returned to room temperature at 30°C and reacted for 16 hours, filtered and removed the solvent, and then recrystallized with a mixed solvent of petroleum ether and dichloromethane to obtain a reddish-brown product. The yield 90%.

[0041] Anal.Calc.for C 42 h 52 Cl 2 N 2 o 2 Ti (%): C, 68.57; H, 7.12; N, 3.81. Found (%): C, 68.55; H, 7.09; N, 3.80. FD-MS: m / z 734.2 (calcd 734.3).

Embodiment 1

[0043] This example is used to illustrate the olefin polymerization catalyst and olefin polymerization method provided by the present invention.

[0044] Preparation of polyethylene: evacuate the heated and dried 500mL polymerization kettle with nitrogen for two times, and then introduce ethylene gas after vacuuming, then add 10mL (8.6mmol) of trimethylaluminum toluene solution in sequence, and pass through anhydrous and anhydrous Oxygen-treated toluene 336mL and water (4.3mmol), under stirring, feed ethylene with a pressure of 1atm. After the solution reaches saturation, add 4mL (21.3μmol) of toluene solution of the salicylaldimine catalyst precursor shown in formula (II) ), and reacted at 20°C for 5min under this pressure, then added an acidified solution of ethanol to terminate the reaction, and obtained 5.66g of polyethylene. According to calculation, the polymerization activity was 3.2×10 6 g·mol -1 (Ti)·h -1 .

[0045] The melting point of the polyethylene as measured...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melting pointaaaaaaaaaa
molecular weight distributionaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The present invention provides an olefin polymerization catalyst, an olefin polymerization method, and a polyolefin prepared through the olefin polymerization method. The olefin polymerization catalyst contains a salicylaldimine catalyst precursor represented by a formula (I), alkyl aluminum and water, wherein R1 and R 2 are the same or different and are respectively and independently hydrogen atom or a linear or branched C1-C20 of alkyl, Ar is C6-C20 aryl, aralkyl or aralkoxy, and the hydrogen atom on the aryl, aralkyl or aralkoxy is optionally substituted by a halogen atom. The olefin polymerization catalyst has a high catalytic activity. In addition, when the olefin polymerization catalyst is used for ethylene and alpha-olefin copolymerization, the continuous inserting proportion of the alpha-olefin can be reduced so as to improve the melting point and the mechanical property of the copolymer. The formula I is defined in the instruction.

Description

technical field [0001] The invention relates to an olefin polymerization catalyst, an olefin polymerization method and polyolefin prepared by the olefin polymerization method. Background technique [0002] Since the beginning of the 21st century, with the improvement of the national economy and the needs of the defense industry, polymer materials, especially polyolefin materials, have played an increasingly important role. Due to the abundance and low cost of polyolefin raw materials and easy processing and molding, the annual production of polyolefin products in the world exceeds 100 million tons, becoming one of the largest industries. Polyolefin materials not only have a relatively low density, but also have excellent chemical resistance, water resistance, mechanical strength, electrical insulation, etc., and can be used in films, pipes, plates, various molded products, wires and cables, etc., not only in Agriculture, packaging, automobiles, electrical appliances and oth...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F10/02C08F210/16C08F4/642
Inventor 韩书亮徐林贺小进邵明波孙伟于国柱李传清解希铭
Owner CHINA PETROLEUM & CHEM CORP