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Strip-shaped silicon dioxide carrier with grid structure, preparation method thereof, catalyst and application

A technology of silica and grid structure, applied in the field of porous materials, can solve the problems of complex process, low strength, and limited application of porous silica strips, and achieve unbreakable, good compression resistance, and equipment requirements simple effect

Pending Publication Date: 2021-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of low strength and limited application of powdery or granular silica carriers in the prior art, as well as the complex process of porous silica strips prepared in the prior art , providing a strip-shaped silica carrier with a grid structure and its preparation method, catalyst and application. The method has simple process flow, simple equipment requirements, and short cycle; and the obtained carrier has good compressive strength and is not easy to break , and the carrier is relatively stable at high temperature, which can meet the requirements of transportation, filling and use in actual industrial production

Method used

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  • Strip-shaped silicon dioxide carrier with grid structure, preparation method thereof, catalyst and application
  • Strip-shaped silicon dioxide carrier with grid structure, preparation method thereof, catalyst and application

Examples

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preparation example Construction

[0018] A first aspect of the present invention provides a method for preparing a strip-shaped silica carrier with a grid structure, wherein the method includes:

[0019] (1) mixing silicon dioxide with starch and / or Tianqing powder to obtain material A;

[0020] (2) Nitrate, paratungstate, silica sol and water are mixed to obtain material B;

[0021] (3) mixing and kneading the material A and the material B into a plastomer, and extruding the plastomer into a strand and drying and calcining;

[0022] Wherein, the nitrate is sodium nitrate and / or potassium nitrate;

[0023] Wherein, the paratungstate is one or more of sodium paratungstate, potassium paratungstate and ammonium paratungstate.

[0024] In the present invention, the average particle size is measured by a laser particle size distribution analyzer, and the specific surface area and pore volume are measured by a nitrogen adsorption method.

[0025] According to the present invention, the average particle size of th...

Embodiment 1

[0048] This example is to illustrate the strip-shaped silica carrier with grid structure prepared by the method of the present invention.

[0049] (1) fully mix 100g silicon dioxide solid powder (80 mesh) and 10g starch to obtain material A;

[0050] (2) fully mixing 12g of silica sol (calculated by silica), 6g of sodium nitrate, 4g of ammonium paratungstate and 45g of water with a silica content of 30% to obtain material B;

[0051] (3) Under the condition of continuous stirring at a stirring rate of 50 r / min, the materials A and B are fully mixed and kneaded into a wet plastic body; in a stainless steel kneading extruder, the extrusion rate is 150 r / min through an orifice plate of Φ2 mm. The elongated solid cylinder extruded under the conditions of ;

[0052] (4) drying at room temperature for 12 hours, drying at 80 ° C for 8 hours, then, calcining at 850 ° C for 8 hours, the temperature rise rate from room temperature to the set roasting temperature is 4 ° C / min, and the r...

Embodiment 2

[0056] This example is to illustrate the strip-shaped silica carrier with grid structure prepared by the method of the present invention.

[0057] (1) fully mix 100g silicon dioxide solid powder (100 mesh) and 25g starch to obtain material A;

[0058] (2) fully mixing 8g of silica sol (calculated by silica), 10g of sodium nitrate, 8g of sodium paratungstate and 64g of water with a silicon dioxide content of 25% to obtain material B;

[0059] (3) Under the condition of continuous stirring at a stirring rate of 140 r / min, the materials A and B are fully mixed and kneaded into a wet plastic body; in a stainless steel kneading extruder, the extrusion rate is 400 r / min through an orifice plate of Φ2 mm. The elongated solid cylinder extruded under the conditions of ;

[0060] (4) drying at room temperature for 10 hours, drying at 140 ° C for 4 hours, then, calcining at 900 ° C for 6 hours, the heating rate from room temperature to the set roasting temperature is 5 ° C / min, and the ...

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Abstract

The invention relates to the technical field of porous materials, and discloses a strip-shaped silicon dioxide carrier with a grid structure, a catalyst, and a preparation method and application of the carrier. The method comprises the following steps: (1) mixing silicon dioxide with starch and / or sesbania powder to obtain a material A; (2) mixing nitrate, paratungstate, silica sol and water to obtain a material B; and (3) kneading and extruding the material A and the material B into strips, wherein the paratungstate is one or more of sodium paratungstate, potassium paratungstate and ammoniumparatungstate. The method is simple in technological process, simple in equipment requirement and short in period; and the obtained carrier has high compressive strength, is not easy to break, and canmeet the requirements of transportation, filling and use processes in industrial actual production.

Description

technical field [0001] The invention relates to the technical field of porous materials, in particular to a strip-shaped silica carrier with a grid structure, a preparation method, catalyst and application thereof. Background technique [0002] Porous silica materials have properties such as large specific surface area, appropriate pH and excellent thermal stability, and are widely used in many fields. It can be widely used in catalytic processing in oil refining, chemical and other industries. However, the porous silica material obtained by the traditional method has a wide pore size distribution, and inevitably has a large number of defects, and the pore channel distribution is irregular, resulting in an uneven pore size distribution. Therefore, the application of diffusion in the catalytic process has certain limitations. [0003] Therefore, it is of great significance to research and develop strip-shaped high-strength silica and its preparation method. SUMMARY OF THE...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/08B01J23/04B01J23/34B01J35/10B01J32/00C07C11/04C07C2/84
CPCB01J21/08B01J23/04B01J23/34C07C2/84B01J35/394B01J35/60C07C11/04Y02P20/52
Inventor 赵清锐张明森韦力王雪刘东兵
Owner CHINA PETROLEUM & CHEM CORP
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