Method for preparing monolithic porous carbon with basic magnesium carbonate for catalyzing phenolic aldehyde to be polymerized

A magnesium carbonate catalyzed phenolic, monolithic technology, applied in the preparation/purification of alkali metal compounds, carbon, chemical instruments and methods, etc., can solve the problems of activator pollution, cumbersome process, high cost, and achieve high equilibrium adsorption capacity. The effect of fast gel speed and large specific surface area

Inactive Publication Date: 2017-05-31
SHAANXI YIPINDA PETROCHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A lot of research has been done on the preparation of porous carbon materials with well-developed pores through the activation method. However, the process of this method is cumbersome and the cost is high. At the same time, the use of activators may also cause pollution.
In addition, conventional porous carbon is in a powder state, and it is easy to cause pore blockage after being formed with a binder. At the same time, the pulverization under the impact of high-flow airflow often leads to the reduction of the adsorption and separation performance of this type of porous carbon.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The method for preparing monolithic porous carbon by basic magnesium carbonate catalyzed phenolic polymerization is characterized in that: comprising the following steps:

[0019] (1) First add 1g basic magnesium carbonate to 10mL deionized water, stir at room temperature and let it stand for 24 hours, then sonicate for 2 hours under the condition of ultrasonic power of 100W, and then heat in a constant temperature water bath at 35°C for 2 hours , cooled to room temperature to obtain a saturated basic magnesium carbonate solution;

[0020] (2) Take 4.2g of saturated basic magnesium carbonate solution, add 3.0g of resorcinol and 4.42g of formaldehyde in sequence, stir for 1 hour, seal it, react at 70°C for 4 hours, and obtain a wet gel;

[0021] (3) After drying the wet gel obtained in step (2), place it in a tubular carbonization furnace. Under the protection of an inert gas, heat up to 650°C at a rate of 3°C / min, react for 2 hours, and then naturally Cool to room temp...

Embodiment 2

[0023] The method for preparing monolithic porous carbon by basic magnesium carbonate catalyzed phenolic polymerization is characterized in that: comprising the following steps:

[0024] (1) First add 1g basic magnesium carbonate to 10mL deionized water, stir at room temperature and let it stand for 24 hours, then sonicate for 2 hours under the condition of ultrasonic power of 200W, and then heat in a constant temperature water bath at 48°C for 2 hours , cooled to room temperature to obtain a saturated basic magnesium carbonate solution;

[0025] (2) Take 4.2g of saturated basic magnesium carbonate solution, add 3.0g of resorcinol and 4.42g of formaldehyde in sequence, stir for 1 hour, seal it, and react at 100°C for 4 hours to obtain a wet gel;

[0026] (3) After drying the wet gel obtained in step (2), place it in a tubular carbonization furnace. Under the protection of an inert gas, heat up to 1050°C at a rate of 3°C / min, react for 2 hours, and then naturally Cool to room ...

Embodiment 3

[0028] The method for preparing monolithic porous carbon by basic magnesium carbonate catalyzed phenolic polymerization is characterized in that: comprising the following steps:

[0029] (1) First add 1g basic magnesium carbonate to 10mL deionized water, stir at room temperature and let it stand for 24 hours, then sonicate for 2 hours under the condition of ultrasonic power of 150W, and then heat in a constant temperature water bath at 42°C for 2 hours , cooled to room temperature to obtain a saturated basic magnesium carbonate solution;

[0030] (2) Take 4.2g of saturated basic magnesium carbonate solution, add 3.0g of resorcinol and 4.42g of formaldehyde in sequence, stir for 1 hour, seal it, and react at 85°C for 4 hours to obtain a wet gel;

[0031] (3) After drying the wet gel obtained in step (2), place it in a tubular carbonization furnace. Under the protection of nitrogen, heat up to 750°C at a rate of 3°C / min, react for 2h, and then cool naturally to room temperature...

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Abstract

The invention discloses a method for preparing a monolithic porous carbon with basic magnesium carbonate for catalyzing phenolic aldehyde to be polymerized, which includes the following steps: (1) a saturated basic magnesium carbonate solution is prepared; (2) resorcinol and formaldehyde are sequentially added into the saturated basic magnesium carbonate solution sealed after being stirred, and after four hours of reaction under 70 DEG C to 100 DEG C, a wet gel is obtained; (3) after being dried, the wet gel obtained in step (2) is put into a tubular carbonization furnace, reacts under the protection of inert gas for two hours after being heated to 650 DEG C to 1050 DEG C, and is then naturally cooled to room temperature, and thereby the monolithic porous carbon is obtained. With resorcinol and formaldehyde as carbon soruces, the method utilizes the catalytic effect and easy decomposition property of basic magnesium carbonate to prepare the monolithic porous carbon by rapid gelation and carbonization control, and the mechanical strength reaches 9.4MPa. The method has high gelation speed, the specific surface area of the prepared product is large, and the CO2 equilibrium absorption capacity is high.

Description

technical field [0001] The invention belongs to the field of carbon material preparation, and in particular relates to a method for preparing monolithic porous carbon by catalyzing phenolic polymerization with basic magnesium carbonate. Background technique [0002] As one of the most important greenhouse gases, CO in the atmosphere 2 The increasing content of cyanide has become a major environmental issue of widespread concern to mankind. At the same time, CO 2 It is also an important industrial raw material, and has many applications in the fields of inorganic chemical industry and organic chemical industry. Therefore, using appropriate methods to achieve CO 2 It is very necessary to capture and use them rationally. Adsorption is an important CO 2 capture method. The method has low energy consumption and large adsorption capacity, and is widely used in the separation and purification of flue gas and natural gas. Common adsorbents include molecular sieves, porous sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05B01J20/20B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01D2257/504B01J20/20B01J20/28054C01P2006/12Y02C20/40Y02P20/151
Inventor 李长英
Owner SHAANXI YIPINDA PETROCHEM CO LTD
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