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Low temperature synthesis method of kaliophilite catalyst used for preparation of biodiesel

A technology of biodiesel and kalephine, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, biofuels, etc., can solve the problems of high energy consumption for preparation and no kalephine has been found, and achieve high catalytic activity and easy The effect of separation and simple process

Active Publication Date: 2018-12-18
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The synthesis of powdered kaleidite reported in current patent literature requires high-temperature calcination, and its preparation requires high energy consumption; through a systematic review of a large number of domestic patents and literature, no direct low-temperature synthesis of kaleidite by using circulating fluidized bed fly ash has been found. Stone related reports

Method used

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  • Low temperature synthesis method of kaliophilite catalyst used for preparation of biodiesel
  • Low temperature synthesis method of kaliophilite catalyst used for preparation of biodiesel
  • Low temperature synthesis method of kaliophilite catalyst used for preparation of biodiesel

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Experimental program
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Effect test

preparation Embodiment 1

[0050] (1) Take by weighing 100g circulating fluidized bed fly ash;

[0051] (2) Take by weighing 11.2g potassium hydroxide, put in the beaker;

[0052] (3) Take by weighing 65.6g potassium silicate, put in the beaker;

[0053] (4) the potassium hydroxide taken by step (2) is dissolved in the potassium water glass taken by step (3), stirred and cooled to room temperature;

[0054] (5) The mixed solution of step (4) is placed in a blender, the circulating fluidized bed fly ash taken in step (1) is placed in a blender, and stirred to obtain a uniform slurry;

[0055] (6) Pour the slurry into a mold to form it, vibrate to eliminate air bubbles, seal the mold with a plastic film sealing bag, place it in an incubator at 60°C for 24 hours, and then release the mold to obtain a bulk kanepheline precursor;

[0056] (7) Place the bulk kanepheline precursor obtained in step (6) in a 200mL hydrothermal reaction kettle, add 50mL of 4mol / L potassium hydroxide solution, seal the kettle, a...

preparation Embodiment 2

[0059] (1) Take by weighing 100g circulating fluidized bed fly ash;

[0060] (2) Take by weighing 11.2g potassium hydroxide, put in the beaker;

[0061] (3) Take by weighing 50.5g potassium silicate, put in the beaker;

[0062] (4) the potassium hydroxide taken by step (2) is dissolved in the potassium water glass taken by step (3), stirred and cooled to room temperature;

[0063] (5) The mixed solution of step (4) is placed in a blender, the circulating fluidized bed fly ash taken in step (1) is placed in a blender, and stirred to obtain a uniform slurry;

[0064] (6) Pour the slurry into a mold for molding, shake to eliminate air bubbles, seal the mold with a plastic film sealing bag, place it in an incubator at 80°C for 24 hours, and then release the mold to obtain a bulk kanepheline precursor;

[0065] (7) Put the bulk kanepheline precursor obtained in step (6) in a 200mL hydrothermal reaction kettle, add 50mL of 6mol / L potassium hydroxide solution, seal the kettle, and ...

preparation Embodiment 3

[0068] (1) Take by weighing 100g circulating fluidized bed fly ash;

[0069] (2) Take by weighing 11.2g potassium hydroxide, put in the beaker;

[0070] (3) Take by weighing 35.0g potassium silicate, put in the beaker;

[0071] (4) the potassium hydroxide taken by step (2) is dissolved in the potassium water glass taken by step (3), stirred and cooled to room temperature;

[0072] (5) The mixed solution of step (4) is placed in a blender, the circulating fluidized bed fly ash taken in step (1) is placed in a blender, and stirred to obtain a uniform slurry;

[0073] (6) Pour the slurry into a mold for molding, shake to eliminate air bubbles, seal the mold with a plastic film sealing bag, place it in an incubator at 80°C for 24 hours, and then release the mold to obtain a bulk kanepheline precursor;

[0074] (7) Place the bulk kanepheline precursor obtained in step (6) in a 200mL hydrothermal reaction kettle, add 50mL of 6mol / L potassium hydroxide solution, seal the kettle, an...

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Abstract

The invention discloses a low temperature synthesis method of a kaliophilite catalyst used for preparation of biodiesel and application of the kaliophilite catalyst to preparation of biodiesel. The preparation method comprises the following steps: mixing circulating fluidized bed fly ash, potash water glass and potassium hydroxide at the mass ratio of 1: 0.350-0.656: 0.112, directly synthesizing bulk kaliophilite through processes of moulding, maintenance, hydrothermal crystallization and the like, crushing the bulk kaliophilite, and screening bulk kaliophilite particles with particle size being 0.150-0.315 mm so as to obtain the catalyst for biodiesel. The catalyst has advantages of low reaction temperature, high catalytic activity, easy separation of products, high yield and the like, and has a potential industrial application prospect.

Description

technical field [0001] The invention belongs to the field of catalyst preparation and solid waste resource utilization, and in particular relates to a synthesis method of a kanepheline catalyst used in the preparation of biodiesel. Background technique [0002] Circulating fluidized bed fly ash is a solid waste produced by circulating fluidized bed boilers with new clean coal combustion technology. According to statistics, the annual emission of circulating fluidized bed fly ash in my country is as high as 90 million tons [1] . Due to the relatively low furnace combustion temperature of the circulating fluidized bed boiler (about 800 ° C ~ 900 ° C), the produced circulating fluidized bed fly ash is mainly amorphous aluminosilicate, but its particles are loose and easy to absorb water, which is limited Its application in the field of cement and other building materials has been hindered, resulting in a large amount of accumulation and serious waste of resources, environment...

Claims

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Application Information

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IPC IPC(8): B01J21/16B01J35/02C10L1/02C11C3/10
CPCC10L1/02C11C3/10B01J21/16B01J35/50B01J35/40Y02E50/10
Inventor 张耀君贺攀阳陈浩韩智超张叶刘礼才
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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