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Heterogenous catalysis solid alkali catalyst, and its preparing method and use

A solid base catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of catalyst active component loss, catalyst activity decline, etc., to achieve strong interaction and high activity And the effect of improving stability and not easy to lose

Inactive Publication Date: 2007-07-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the reaction was carried out for 20 hours, the activity of the catalyst decreased, and the conversion rate of EC was only 63.5%, which may be caused by the loss of active components of the catalyst during the reaction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Prepare 0.1M CaCl separately 2 , ZrOCl 2 Mixed solution and 20% (volume content) ammonia solution; 0.1MCaCl 2 , ZrOCl 2 ZrOCl in mixed solution 2 and CaCl 2 The molar ratio of the solution is 4.1; under continuous heating and stirring, the mixed solution and ammonia water are added dropwise to the beaker at the same time, the precipitation temperature is controlled to be 30°C, and the pH value of the precipitation is 10. After the precipitation is complete, age at 60°C for 2 hours, and wash repeatedly until there is no Cl - Detected; the washed precipitate was baked at 105°C for 12 hours, and then placed in a muffle furnace for 6 hours at 500°C to roast to obtain a catalyst. The experimental analysis showed that the content of CaO in the catalyst was 10% (wt), ZrO 2 The content is 90% (wt).

[0037] The catalyst is crushed into 1.2-2mm and applied to the catalytic rectification device. When the pressure is 0.2MPa, the temperature of the reaction section is contro...

Embodiment 2

[0039] Prepare 0.5M CaCl separately 2 , ZrOCl 2 Mixed solution and 50% (volume content) ammonia solution; 0.5MCaCl 2 , ZrOCl 2 ZrOCl in mixed solution 2 and CaCl 2 The molar ratio of the solution is 1.0; under continuous heating and stirring, the mixed solution and ammonia water are added dropwise to the beaker at the same time, the temperature of the precipitation is controlled at 30°C, and the pH value of the precipitation is 12. After the precipitation is complete, age at 40°C for 4 hours, and wash repeatedly until there is no Cl - Detection; the washed precipitate was baked at 100°C for 12 hours, and then baked in a muffle furnace at 600°C for 4 hours to obtain a catalyst. Recording through experimental analysis, CaO content is 30% (wt) in the catalyst, ZrO2 The content is 70% (wt).

[0040] The catalyst is crushed into 1.2-2mm and applied to the catalytic rectification device. When the pressure is 0.3MPa, the temperature of the reaction section is controlled by an ...

Embodiment 3

[0042] Prepare 0.1M Ca(NO 3 ) 2 , ZrO(NO 3 ) 2 Mixed solution and 20% (volume content) ammonia solution; 0.1MCa (NO 3 ) 2 , ZrO(NO 3 ) 2 ZrO(NO 3 ) 2 and Ca(NO 3 ) 2 The molar ratio of the solution is 4.1; under continuous heating and stirring, the mixed solution and ammonia water are added dropwise to the beaker at the same time, the precipitation temperature is controlled at 60°C, and the precipitation pH value is 9. After the precipitation is complete, age at 40°C for 6 hours, and wash repeatedly until there is no Cl - Detection; the washed precipitate was baked at 105°C for 12 hours, and then baked in a muffle furnace at 700°C for 4 hours to obtain a catalyst. Recording through experimental analysis, CaO content is 10% (wt) in the catalyst, ZrO 2 The content is 90% (wt).

[0043] The catalyst is crushed into 1.2-2mm and applied to the catalytic rectification device. When the pressure is 0.6MPa, the temperature of the reaction section is controlled by an exter...

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Abstract

A solid alkali catalyst with high stability and activity for the multi-phase catalytic synthesis of dimethyl carbonate is composed of calcium oxide (10-30 mass %) and zirconium oxide (70-90). Its preparing process is also disclosed, which features that the CaCl2 or Ca (NO3)2 and ZrOCl2 or ZrO (NO3)2 are used as its Ca source and Zr source.

Description

technical field [0001] The invention relates to a heterogeneous catalysis solid base catalyst and its preparation method and application, in particular to a heterogeneous catalysis solid base catalyst for synthesizing dimethyl carbonate and its preparation method and application. Background technique [0002] At present, green chemistry has been paid more and more attention. Dimethyl Carbonate (DMC) is a new low-pollution, biodegradable and environmentally friendly green basic chemical raw material. Its synthesis and application have been widely used in the past ten years. It has received widespread attention at home and abroad. The industrial methods for synthesizing dimethyl carbonate mainly include phosgene method, methanol oxidative carbonylation method and transesterification method. Among them, the transesterification method has become a method with great industrial application prospects due to its mild reaction conditions, simple process flow, no corrosion to equipme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J23/02B01J37/03C07C68/06C07C69/96
CPCB01J37/03B01J23/02C07C68/065B01J21/066Y02P20/10C07C69/96
Inventor 孙予罕魏伟张德胜石大川刘丽明王慧张焕仁程延华赵宁王谋华王秀芝
Owner PETROCHINA CO LTD
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