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

Silica gel supported monophosphine ligand, ethylene oligomerization catalyst composition containing silica gel supported monophosphine ligand and ethylene oligomerization method

A technology of ethylene oligomerization and composition, which is applied in the direction of catalysts, hydrocarbons, hydrocarbons, etc., can solve the problems of high polymer hanging on the wall, and achieve the effects of reducing the deactivation rate, avoiding deactivation, and reducing production costs

Active Publication Date: 2020-06-05
WANHUA CHEM GRP CO LTD
View PDF12 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase of ethylene oligomerization reaction temperature helps to solve the problem of high polymer hanging on the wall, making it more conducive to industrial production

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
  • Silica gel supported monophosphine ligand, ethylene oligomerization catalyst composition containing silica gel supported monophosphine ligand and ethylene oligomerization method
  • Silica gel supported monophosphine ligand, ethylene oligomerization catalyst composition containing silica gel supported monophosphine ligand and ethylene oligomerization method
  • Silica gel supported monophosphine ligand, ethylene oligomerization catalyst composition containing silica gel supported monophosphine ligand and ethylene oligomerization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of silica gel-supported monophosphine ligands: (1) Heat treatment of Davison 955 silica gel at 600-800° C. under nitrogen atmosphere; (2) Grafting monophosphine ligands on the heat-treated silica gel. All operations were carried out under the protection of high-purity nitrogen. First, transfer 20 g of quantitative silica gel after heat treatment at 600-800°C to a Schlenk bottle, add 150 mL of refined n-hexane as a solvent with a syringe, and add 42 mg of monophosphine ligand I. Adjust the temperature to 45°C and keep stirring at constant temperature for 3-6h. Raise the temperature to 80°C, increase the nitrogen flow rate at the same time, and after the n-hexane is completely evaporated to dryness, the obtained solid powder is the silica gel-supported monophosphine ligand II of the present invention, and its structure is as follows:

[0034]

[0035] Silica gel-supported monophosphine ligand / chromium acetylacetonate composition treatment: take 6 μmol of si...

Embodiment 2

[0038] Preparation of silica gel supported monophosphine ligand: same as Example 1.

[0039] Treatment of silica gel-supported monophosphine ligand / chromium acetylacetonate composition: same as in Example 1.

[0040] Ethylene oligomerization: The amount of cocatalyst added is 2100 μmol MMAO (7wt% Al n-heptane solution), and the others are the same as in Example 1.

Embodiment 3

[0042] Preparation of silica gel supported monophosphine ligand: same as Example 1.

[0043] Treatment of silica gel-supported monophosphine ligand / chromium acetylacetonate composition: same as in Example 1.

[0044] Ethylene oligomerization: The amount of co-catalyst added is 1750 μmol MMAO (7wt% Al n-heptane solution), and the others are the same as in Example 1.

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
Activeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a silica gel supported monophosphine ligand and a catalyst composition comprising the silica gel supported monophosphine ligand and used for ethylene oligomerization. The catalyst composition comprises the silica gel supported monophosphine ligand, a transition metal compound, an alkyl aluminum cocatalyst and an electron donor. The invention also provides an ethylene oligomerization method using the catalyst composition. A double-kettle series polymerization process is adopted; the ligand, the metal compound and the cocatalyst are added into a first reaction kettle, theelectron donor is added into a second reaction kettle, the early reaction stage is performed in the first reaction kettle, the mixture is transferred into the second reaction kettle for continuous reaction in the later reaction stage, so that the possibility of catalyst deactivation caused by overhigh reaction heat release at the early reaction stage is reduced, and the high-activity duration ofthe catalyst is prolonged. The catalytic system can catalyze the ethylene oligomerization reaction with high activity, the catalytic activity is as high as 5.05 * 10 < 6 > g product / (mol Cr h), and the overall selectivity of 1-hexene and 1-octene with high added value can reach 80%.

Description

technical field [0001] The invention belongs to the field of ethylene oligomerization catalysis, and relates to a silica gel supported monophosphine ligand, an ethylene oligomerization catalyst composition comprising the same and an ethylene oligomerization method. Background technique [0002] Linear α-olefins are widely used in industry and can be used as ethylene comonomers, plasticizers, fatty acids, lubricating oil additives and many other fields. Among them, 1-hexene and 1-octene are in the greatest demand. As a comonomer of ethylene, 1-hexene can significantly improve the impact and tear resistance of polyethylene, and 1-octene can be used to produce polyolefin elasticity. body. At present, the industrial production of α-olefins is still dominated by ethylene oligomerization. [0003] Bollmann et al. (J.AM.CHEM.SOC.2004,126,14712-14713) of Sasol Company used the Cr / PNP / MAO catalytic system to realize the transition from ethylene trimerization to tetramerization for ...

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
IPC IPC(8): B01J31/24C07C2/36C07C11/02C07C11/107
CPCB01J31/2404B01J31/2234B01J31/143C07C2/36B01J2231/20B01J2531/62C07C2531/24B01J35/19C07C11/107C07C11/02
Inventor 刘帮明陈冠良黄玲燕张田财林小杰张彦雨陈海波
Owner WANHUA CHEM GRP CO LTD