Supported metallocene catalyst and its preparation method and application and preparation method of methyl acrylate
A technology of metallocene catalysts and metallocene compounds, which is applied in the preparation of organic compounds, catalytic reactions, catalyst carriers, etc., can solve the problems that catalysts are not environmentally friendly and cannot be reused, and achieve convenient application, narrow particle size distribution curves, and avoid The effect of reunion
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0051] In the preparation process of the above-mentioned carrier, the pore size distribution of the spherical mesoporous composite material is controlled to be a trimodal distribution mainly by controlling the composition of the filter cake of the mesoporous material (component a), and the pore size distribution of the spherical mesoporous composite is mainly controlled by controlling the molding method (that is, first The component a and the component b are mixed and first ball milled, the obtained first ball mill slurry is mixed with water to make slurry, and then the second ball mill is carried out to obtain the second ball mill slurry, and the second ball mill The slurry is spray-dried) to control the microscopic morphology of the spherical mesoporous composite material into a spherical shape.
[0052] According to the present invention, in step (1), the process of preparing a filter cake of a mesoporous molecular sieve material with a one-dimensional hollow spherical pore ...
Embodiment approach
[0057] The present invention has no special limitation on the conditions of the first mixing contact, for example, the conditions of the first mixing contact generally include: the temperature can be 10-60°C, preferably 10-20°C; the time can be 10-72 Hours, preferably 10-30 hours; pH value can be 1-7, preferably 3-6. In order to be more conducive to uniform mixing among the various substances, according to a preferred embodiment of the present invention, the first mixing and contacting is performed under stirring conditions.
[0058] In the present invention, the crystallization conditions include: the temperature may be 30-150° C., preferably 40-80° C.; the time may be 10-72 hours, preferably 20-30 hours. According to a preferred embodiment, the crystallization is carried out by hydrothermal crystallization.
[0059] In step (1), in the process of preparing the filter cake of the mesoporous molecular sieve material having a one-dimensional hollow spherical pore structure, th...
Embodiment 1
[0095] This example is used to illustrate the supported metallocene catalyst of the present invention and its preparation method
[0096] (1) Preparation of hollow spherical mesoporous composites
[0097] Add 1g (0.00017mol) template agent P123 and 1.69g (0.037mol) ethanol to 28mL of acetic acid and sodium acetate buffer solution with pH = 4.4, stir at 15°C until the template agent is completely dissolved, add 6g (0.05mol) three Add methylpentane to the above solution, stir at 15°C for 8h, then add 2.13g (0.014mol) tetramethoxysilane to the above solution, stir at 15°C for 20h, then transfer the solution to the agate lining After crystallizing in an oven at 60°C for 24 hours in a reaction kettle, filter and wash with deionized water for 4 times, and then filter with suction to obtain filter cake A1 of mesoporous molecular sieve material with a one-dimensional hollow spherical pore structure.
[0098] Water glass with a concentration of 15% by weight and sulfuric acid solution...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
| specific surface area | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More