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

Vinylidene acenaphthylene α-diimine nickel olefin catalyst and its preparation method and application

A technology of nickel catalyst and diimine, which is applied in the field of vinylidene acenaphthylene asymmetric α-diimine nickel catalyst and its preparation, which can solve the problems of low ligand yield, large steric hindrance, and low polymerization activity of the catalyst , to achieve good polymerization activity, good thermal stability and the effect of

Active Publication Date: 2022-03-08
HANGZHOU XINGLU TECH CO LTD +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst with a symmetrical structure in which the aniline substituents on both sides are large-volume substituents, when preparing the ligand of the catalyst, due to the large steric hindrance, the yield of the ligand is very low, resulting in the synthesis cost of the catalyst. At the same time, the R' of the bulky substituent group hinders the rapid insertion of ethylene, resulting in low polymerization activity of the catalyst when catalyzing ethylene polymerization, which limits its industrial application

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
  • Vinylidene acenaphthylene α-diimine nickel olefin catalyst and its preparation method and application
  • Vinylidene acenaphthylene α-diimine nickel olefin catalyst and its preparation method and application
  • Vinylidene acenaphthylene α-diimine nickel olefin catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1, preparation A1:

[0043] 1) Preparation of B2:

[0044] B1 (5g, 24mmol) was dissolved in 250mL carbon tetrachloride, under N 2 Under atmosphere, reflux at 85°C for 30min, add 13g (75mmol) N-bromosuccinimide (NBS) and 1g benzoyl peroxide to the solution, and continue to reflux at 85°C for 5h. After the reaction is over, filter while hot, and use 200mL hot CCl 4 After washing, the mixture obtained by washing was subjected to rotary evaporation, and the solvent carbon tetrachloride was removed to obtain a yellow solid, which was a mixture of product B2 and NBS. Purified by column chromatography with dichloromethane as the eluent, the total mass of product B2 was 5.53 g, and the yield was 63%.

[0045] 2) Preparation of B3:

[0046] B2 (5.5g, 15mmol) in N 2 Dissolve in 100mL acetone under atmosphere, then add 22.5g (1.38mol) anhydrous potassium iodide to the solution, and reflux at 60°C for 4h. After the reaction, the mixture was cooled and poured into a...

Embodiment 2

[0049] Example 2, Preparation A2: In 2,4-bis(benzhydryl)-6-methylaniline (8.8g, 20mmol) and vinylidene acenaphthylquinone (3.7g, 18mmol) in toluene (150mL) solution Add p-toluenesulfonic acid (0.34g, 2mmol) and reflux for 6h. The solvent was removed, and the residue was subjected to silica gel column chromatography with a mixed solvent of dichloromethane and petroleum ether at a volume ratio of 2:1 to obtain A2 with a mass of 4.4 g and a yield of 39%.

Embodiment 3

[0050] Example 3, Preparation A3: In 2,4-bis(bis(4-fluorophenyl)methyl)-6-methylaniline (10.2g, 20mmol) and vinylidene acenaphthylquinone (3.7g, 18mmol) P-toluenesulfonic acid (0.34 g, 2 mmol) was added to the toluene (150 mL) solution, and the reaction was refluxed for 10 h. The solvent was removed, and the residue was subjected to silica gel column chromatography with a mixed solvent of dichloromethane and petroleum ether at a volume ratio of 2:1 to obtain A3 with a mass of 4.9 g and a yield of 39%.

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
polydispersity indexaaaaaaaaaa
polydispersity indexaaaaaaaaaa
polydispersity indexaaaaaaaaaa
Login to View More

Abstract

The invention discloses a large sterically hindered asymmetric (α-diimine) nickel olefin catalyst based on vinylidene acenaphthylene quinone as a skeleton, and a preparation method and application thereof. The structural formula of the large sterically hindered asymmetric (α-diimine) nickel olefin catalyst based on vinylidene acenaphthylene quinone as the skeleton of the present invention is shown in formula (I). where R 1 is benzhydryl or bis(4-fluorophenyl)methyl, R 2 is benzhydryl, bis(4-fluorophenyl)methyl or methyl, R 3 is methyl, ethyl, isopropyl, benzhydryl, bis(4-fluorophenyl)methyl, halogen, trifluoromethyl or methoxy, R 4 is methyl, ethyl or isopropyl, R 5 is methyl, ethyl or isopropyl, R 6 is hydrogen, methyl, ethyl or isopropyl, and X is chlorine or bromine. The catalyst has a simple preparation process, can catalyze ethylene polymerization under the action of a co-catalyst, exhibits good thermal stability and polymerization activity, and has good industrial application prospects.

Description

technical field [0001] The present invention relates to vinylene acenaphthylene α-diimine nickel olefin catalyst and its preparation method and application, in particular to a vinylidene acenaphthylene asymmetric α-diimine nickel catalyst and its preparation method and application, and the use of the The application of the catalyst to catalyze the polymerization of ethylene or propylene to obtain polyethylene or polypropylene. Background technique: [0002] Polyolefin is a basic material related to the national economy and people's livelihood, and because of its excellent performance, variety of varieties, easy availability of raw materials and low price, it is widely used in various fields such as industry, agriculture and national defense. The development and application of new catalysts is one of the core driving forces to promote the progress and development of the polyolefin industry, and is the key to controlling the structure and performance of polyolefin materials. ...

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): C08F110/02C08F2/34C08F4/70C07F15/04C07C249/02C07C251/20
CPCC07F15/045C07C249/02C07C251/20C07C46/00C08F110/02C07C251/22C07C50/22C07C50/24C08F4/7098C08F2/34C08F2500/06
Inventor 不公告发明人
Owner HANGZHOU XINGLU TECH CO LTD