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

Supported metallocene catalyst, preparation method and application thereof, and preparation method of methyl acrylate

A technology of metallocene catalyst and metallocene compound, which is applied in the direction of catalyst activation/preparation, preparation of organic compounds, catalytic reaction, etc. It can solve the problem of insufficient catalytic activity, achieve strong regeneration ability, improve product purity, and reduce powder agglomeration Effect

Active Publication Date: 2020-07-24
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalytic activity of the current silica gel carrier is not high enough after loading the metallocene compound. Therefore, it is necessary to develop an efficient and environmentally friendly catalyst for methyl acrylate

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
  • Supported metallocene catalyst, preparation method and application thereof, and preparation method of methyl acrylate
  • Supported metallocene catalyst, preparation method and application thereof, and preparation method of methyl acrylate
  • Supported metallocene catalyst, preparation method and application thereof, and preparation method of methyl acrylate

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0047] In the preparation method of the silica gel carrier in the prior art, the step of removing the template agent after spray drying is usually included, for example, the template agent is removed by a calcination method. Since the method of the present invention uses a ceramic membrane for filtration and / or washing treatment, the method for preparing the silica gel carrier of the present invention may not include the step of calcination to remove the template agent.

[0048] In the present invention, the average particle diameter of the silica gel carrier is 30-60 μm, and the specific surface area is 150-600 m 2 / g, the pore volume is 0.5-2.5mL / g, and the pore diameter is 5-25nm.

[0049] Preferably, the silica gel carrier has an average particle diameter of 30-60 μm and a specific surface area of ​​200-400 m 2 / g, the pore volume is 1-2mL / g, and the pore diameter is 10-25nm.

[0050] In the present invention, the specific surface area, pore volume and pore diameter are ...

Embodiment 1

[0072] This example is used to illustrate the supported metallocene catalyst of the present invention and its preparation method

[0073] (1) Preparation of silica gel carrier

[0074] The water glass with a concentration of 15% by weight, the sulfuric acid solution with a concentration of 12% by weight and glycerol are mixed in a weight ratio of 5:1:1 and contacted for 1.5 hours at 20°C, and then the concentration is 98% by weight. sulfuric acid to adjust the pH value to 3, then suction-filter the obtained reaction material, and wash with a ceramic membrane filter until the sodium ion content is 0.02% by weight to obtain a silica gel filter cake. . Among them, the operating pressure of the membrane module is 3.3bar, the inlet membrane pressure of the circulation side is 4bar, the outlet membrane pressure of the circulation side is 2.5bar, the membrane surface velocity of the circulation side is 4m / s, the pressure of the permeation side is 0.3bar, and the temperature is 20°C....

Embodiment 2

[0086] This example is used to illustrate the supported metallocene catalyst of the present invention and its preparation method

[0087] (1) Preparation of silica gel carrier

[0088] The water glass with a concentration of 15% by weight, the sulfuric acid solution with a concentration of 12% by weight and glycerol are mixed in a weight ratio of 6:3:1 and contacted for 3 hours at 60°C, and then the concentration is 98% by weight. sulfuric acid to adjust the pH value to 3, then suction-filter the obtained reaction material, and wash with a ceramic membrane filter until the sodium ion content is 0.02% by weight to obtain a silica gel filter cake. Among them, the operating pressure of the membrane module is 3bar, the inlet membrane pressure of the circulation side is 3.5bar, the outlet membrane pressure of the circulation side is 2.5bar, the membrane surface velocity of the circulation side is 4.5m / s, the pressure of the permeation side is 0.4bar, and the temperature is 60°C. T...

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
particle sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of supported metallocene catalysts, and discloses a supported metallocene catalyst, its preparation method and application, and a preparation method of methyl acrylate. The supported metallocene catalyst includes a silica gel carrier and a metallocene compound supported on the silica gel carrier, wherein the silica gel carrier is prepared by the following method: (1) mixing and contacting water glass, polyol and inorganic acid, The mixture obtained after contact is filtered and / or washed using a ceramic membrane filter to obtain a silica gel filter cake; (2) the silica gel filter cake obtained in step (1) is ball milled and then spray-dried to obtain a silica gel carrier. The supported metallocene catalyst of the present invention has good catalytic performance for esterification reaction, and the supported metallocene catalyst can be recycled and reused. The recycling process is simple, and the recycled catalyst still has high reaction activity.

Description

technical field [0001] The present invention relates to the field of supported metallocene catalysts, in particular to a supported metallocene catalyst, a preparation method of a supported metallocene catalyst, a metallocene catalyst obtained by the method, an application of the metallocene catalyst and a Method for the preparation of methyl acrylate. Background technique [0002] Methyl acrylate is an important industrial raw material. The traditional process uses concentrated sulfuric acid as a catalyst in the process of preparing methyl acrylate. This process corrodes equipment and pollutes the environment, and the catalyst cannot be reused. [0003] At present, the common catalyst supports are mesoporous materials and silica gel supports. Silica gel is used repeatedly because of its good fluidity, large specific surface area and high pore melting ability to adsorb catalysts, making it a good carrier for catalysts. However, the catalytic activity of the current silica g...

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): B01J31/22B01J21/08C07C67/08C07C69/54
CPCC07C67/08B01J21/08B01J31/2295B01J37/009B01J37/0203B01J2231/49B01J2531/48B01J2531/0225B01J35/51B01J35/638B01J35/647B01J35/615C07C69/54Y02P20/584
Inventor 亢宇张明森孙姝琦
Owner CHINA PETROLEUM & CHEM CORP