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Preparation method of special solid base catalyst for biodiesel preparation

A solid base catalyst and biodiesel technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems affecting the yield of biodiesel, the decrease of the specific surface area of ​​the carrier, etc., and achieve the improvement of catalytic efficiency , the effect of large specific surface area

Inactive Publication Date: 2017-08-11
陈毅忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is: for the solid base catalyst used in the preparation of traditional biodiesel by impregnation method, the solid base is loaded on the surface of the carrier to block the pore structure of the carrier, resulting in a decrease in the specific surface area of ​​the carrier and affecting the yield of biodiesel. A preparation method of a special solid base catalyst for biodiesel preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] In the three-necked flask, add 200mL of deionized water and 0.3g of sodium dodecylbenzenesulfonate in sequence, and then move the three-necked flask into a magnetic stirrer with a digital display, speed measurement, and constant temperature. , stirring at constant temperature and mixing for 20min, and then under constant temperature stirring, potassium bicarbonate was added to the three-necked flask until potassium bicarbonate was no longer dissolved to obtain a saturated potassium bicarbonate solution; Nitrogen was passed into the middle of the flask, and under nitrogen protection, 30mL styrene, 6g acrylic acid, 3g maleic acid, 8mL mass fraction of 25% potassium persulfate solution and 0.05g azobisisobutyronitrile were added successively to the above-mentioned three-necked flask, Continue to stir and react at a constant temperature for 12 hours at a temperature of 80°C and a rotation speed of 800r / min to obtain a mixed emulsion; measure 150mL of the above-mentioned mixe...

example 2

[0027]In the three-necked flask, add 150mL of deionized water and 0.1g of Span-80 in sequence, then move the three-necked flask into a digital speed measuring constant temperature magnetic stirrer, and stir and mix at a constant temperature at a temperature of 70°C and a speed of 300r / min. 10min, and then under constant temperature stirring, potassium bicarbonate was added to the three-necked flask until the potassium bicarbonate was no longer dissolved to obtain a saturated potassium bicarbonate solution; nitrogen gas was passed into the above-mentioned saturated potassium bicarbonate solution at a rate of 3mL / min , under nitrogen protection, add 20mL styrene and 6mL potassium persulfate solution with a mass fraction of 20% to the above three-necked flask successively, continue to stir and react at a constant temperature for 8h at a temperature of 75°C and a rotational speed of 600r / min to obtain Mixed emulsion: Measure 100mL of the mixed emulsion obtained above, pour it into ...

example 3

[0033] In the three-necked flask, add 170mL of deionized water and 0.2g of Tween-60 in turn, then move the three-necked flask into a digital speed measuring constant temperature magnetic stirrer, and stir and mix at a constant temperature at a temperature of 72°C and a speed of 400r / min. 15min, and then under constant temperature stirring, potassium bicarbonate was added to the three-necked flask until the potassium bicarbonate was no longer dissolved to obtain a saturated potassium bicarbonate solution; nitrogen gas was passed into the above-mentioned saturated potassium bicarbonate solution at a rate of 4mL / min , under nitrogen protection, add 25mL styrene and 7mL potassium persulfate solution with a mass fraction of 23% to the above three-necked flask successively, continue to stir and react at a constant temperature for 9h at a temperature of 77°C and a rotation speed of 700r / min to obtain Mixed emulsion: Measure 120mL of the mixed emulsion obtained above, pour it into a th...

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Abstract

The invention belongs to the technical field of new energy resources and discloses a preparation method of a special solid base catalyst for biodiesel preparation. The method includes: taking sodium dodecyl benzene sulfonate as a surfactant to obtain saturated sodium bicarbonate solution at a high temperature, performing polymerization reaction in a same vessel to obtain polystyrene emulsion, adopting emulsion microspheres for adsorbing the saturated sodium bicarbonate solution, then dropwise adding tetraethyl orthosilicate to realize hydrolysis and coating of surfaces of the emulsion microspheres, decomposing potassium bicarbonate at a lower temperature to generate gas and form a porous structure, and calcining at a higher temperature to remove an polystyrene inner core, so that the special solid base catalyst for biodiesel preparation is obtained. By adoption of the polymer emulsion for adsorption of sodium bicarbonate to form the spongy porous solid base catalyst through two-step calcination, a carrier and an effective component are both in porous structures, and the problem that catalysts prepared according to a traditional impregnation method are prone to causing pore passage blockage and influences on catalysis efficiency is effectively solved.

Description

technical field [0001] The invention discloses a preparation method of a special solid base catalyst for biodiesel preparation, which belongs to the technical field of new energy. Background technique [0002] Biodiesel is a kind of fatty acid methyl ester substance obtained by transesterification with short-chain alcohols with animal and vegetable oils as the main raw material. It has a high cetane number, does not contain sulfur and aromatic compounds, is biodegradable, non-toxic, flash Compared with mineralized diesel oil, it is a new type of environment-friendly energy. Compared with the traditional process of transesterification with alkaline substances such as hydroxide, the solid base catalyst has mild reaction conditions, shows good catalytic activity, and is easy to separate from the product. After the reaction, the catalyst is easy to regenerate and is corrosive to equipment. Small size, simple post-processing, no need for multiple washings, and avoiding the disch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/04B01J35/10
CPCB01J23/04B01J35/61
Inventor 陈毅忠许丽君
Owner 陈毅忠
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