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Preparation method of calcium-zinc-aluminum solid base catalyst

A solid base catalyst, calcium-zinc technology, applied in chemical instruments and methods, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc., can solve the problems of poor catalyst stability and low conversion rate of raw materials, and achieve good stability , good strength and high reuse times

Inactive Publication Date: 2019-04-05
杨萌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are defects such as low raw material conversion rate and poor catalyst stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of calcium-zinc-aluminum solid base catalyst comprises the following steps:

[0019] (1) Weigh Ca(NO 3 ) 2 4H 2 O, Zn(NO 3 ) 2 6H 2 O, Al(NO 3 ) 3 9H 2 O, dissolved in deionized water to obtain a mixed salt solution A, and the total substance concentration of An(Ca), n(Zn), and n(Al) in the mixed salt solution is 0.08mol / mL;

[0020] (2) Weigh CO 3 2- Precipitant Na 2 CO 3 , dissolved in water and stirred to form a 0.09mol / mL precipitant solution B;

[0021] (3) Put equal volumes of mixed salt solution A and precipitant solution B into two constant-pressure dropping funnels, and drop them into a three-necked flask at the same time, and stir the three-necked flask with a magnetic stirrer to obtain a milky white slurry;

[0022] (4) Ultrasonicate the milky white slurry obtained in step (3) for 20 minutes under the condition of ultrasonic power of 300W, then heat it in microwave at 600W for 5 minutes, put it in a water bath at 80°C for 2...

Embodiment 2

[0024] The preparation method of calcium-zinc-aluminum solid base catalyst comprises the following steps:

[0025] (1) Weigh Ca(NO 3 ) 2 4H 2 O, Zn(NO 3 ) 2 6H 2 O, Al(NO 3 ) 3 9H 2 O, dissolved in deionized water to obtain a mixed salt solution A, and the total substance concentration of An(Ca), n(Zn), and n(Al) in the mixed salt solution is 0.1mol / mL;

[0026] (2) Weigh CO 3 2- precipitant NH) 2 CO 3 , dissolved in water, stirred to form a 0.1 mol / mL precipitant solution B;

[0027] (3) Put equal volumes of mixed salt solution A and precipitant solution B into two constant-pressure dropping funnels, and drop them into a three-necked flask at the same time, and stir the three-necked flask with a magnetic stirrer to obtain a milky white slurry;

[0028] (4) Ultrasonicate the milky white slurry obtained in step (3) for 10 minutes under the condition of ultrasonic power of 500W, then heat it in microwave at 800W for 3 minutes, put it in a water bath at 90°C for 24 h...

Embodiment 3

[0030] The preparation method of calcium-zinc-aluminum solid base catalyst comprises the following steps:

[0031] (1) Weigh Ca(NO 3 ) 2 4H 2 O, Zn(NO 3 ) 2 6H 2 O, Al(NO 3 ) 3 9H 2 O, dissolved in deionized water to obtain a mixed salt solution A, and the total substance concentration of An(Ca), n(Zn), and n(Al) in the mixed salt solution is 0.09mol / mL;

[0032] (2) Weigh CO 3 2- Precipitant Na 2 CO 3 , dissolved in water, stirred to form a 0.09 mol / mL precipitant solution B;

[0033] (3) Put equal volumes of mixed salt solution A and precipitant solution B into two constant-pressure dropping funnels, and drop them into a three-necked flask at the same time, and stir the three-necked flask with a magnetic stirrer to obtain a milky white slurry;

[0034] (4) Ultrasonicate the milky white slurry obtained in step (3) for 15 minutes under the condition of ultrasonic power of 400W, then heat it in microwave at 700W for 4 minutes, put it in a water bath at 85°C for 30 ...

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Abstract

The invention discloses a preparation method of a calcium-zinc-aluminum solid base catalyst, The preparation method comprises the following steps: (1) weighing Ca(NO3)2.4H2O, Zn(NO3)2.6H2O, and Al(NO3)3.9H2O, and dissolving with deionized water to obtain a mixed salt solution A; (2) weighing CO32- precipitant, and dissolving in water to form a precipitant solution B; (3) mixing and reacting the mixed salt solution A and the precipitant solution B to obtain milky white slurry; and (4) performing the ultrasonic treatment, microwave heating, performing the water bath, performing the suction filtration, washing obtained precipitates with water until the pH value is 7, vacuum drying the precipitate obtained by virtue of the suction filtration, roasting in a muffle furnace, and naturally coolingto the room temperature to obtain the calcium-zinc-aluminum solid base catalyst. By adopting the method provided by the invention, the prepared catalyst is good in stability, the conversion rate of raw materials can reach about 95 percent, the strength is good, and the number of reutilization times is large.

Description

technical field [0001] The invention belongs to the technical field of solid catalysts, and in particular relates to a preparation method of a calcium-zinc-aluminum solid base catalyst. Background technique [0002] In order to solve the environmental pollution and energy shortage problems caused by the combustion of fossil energy, many countries have formulated corresponding energy-saving and emission-reduction measures and energy development strategies according to their national conditions, and have carried out a lot of basic research work, such as: fossil fuel desulfurization, new Energy utilization, renewable energy development, etc. [0003] Biodiesel is an important part of renewable energy. In the past, liquid alkali sodium hydroxide or sodium methoxide was often used as a catalyst in the preparation of biodiesel. Due to the shortcomings of liquid alkali catalysis, such as complicated post-treatment, waste liquid discharge, and non-reuse, etc., In recent years, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06
CPCB01J23/002B01J23/06B01J2523/00B01J2523/23B01J2523/27B01J2523/31
Inventor 杨萌
Owner 杨萌
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