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Method for preparing biodiesel by solid superbase catalysis

A solid super-alkali and biodiesel technology, which is applied in the chemical industry, can solve the problems of harsh reaction conditions and difficulty in large-scale industrial production, and achieve the effects of short preparation time, simple preparation and high yield

Inactive Publication Date: 2018-12-18
杭州更蓝生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction conditions are harsh and it is difficult to achieve large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] S1, the preparation of catalyst

[0025] Add 14.8g of magnesium nitrate and 10.65g of zirconium nitrate to 30mL of water and 100mL of ethanol to make a solution, add 1mol / L LiOH to the solution, the pH value is 11, reflux and aging for 36 hours, centrifuge, the precipitate is washed with water, dried overnight, in nitrogen Under the atmosphere, the precipitate was put into a muffle furnace and calcined at a high temperature of 800° C. for 3 hours to obtain a solid superbase catalyst A with a Li content of 2%.

[0026] S2, the preparation of biodiesel

[0027] 1) Add sodium hydroxide solution with a mass concentration of 20% to rapeseed oil, stir for 5 hours, separate layers, wash the upper liquid with 80°C distilled water until pH = 7, then add cyclohexane to reflux at 90°C for reaction 5h, and finally vacuum distillation to obtain refined rapeseed oil;

[0028] 2) After mixing methanol and refined rapeseed oil, add the catalyst prepared in step S1, wherein the mass r...

Embodiment 2

[0030] S1, the preparation of catalyst

[0031] Add 14.8g of magnesium nitrate and 8.52g of zirconium nitrate to 30mL of water and 100mL of ethanol to make a solution, add 1mol / L LiOH to the solution, the pH value is 11, reflux and aging for 36 hours, centrifuge, the precipitate is washed with water, dried overnight, in nitrogen Under the atmosphere, the precipitate was put into a muffle furnace and calcined at a high temperature of 800° C. for 3 hours to obtain a solid superbase catalyst B with a Li content of 0.7%.

[0032] S2, the preparation of biodiesel

[0033] 1) Add sodium hydroxide solution with a mass concentration of 20% to rapeseed oil, stir for 5 hours, separate layers, wash the upper liquid with 80°C distilled water until pH = 7, then add cyclohexane to reflux at 90°C for reaction 5h, and finally vacuum distillation to obtain refined rapeseed oil;

[0034] 2) After mixing methanol and refined rapeseed oil, add the catalyst prepared in step S1, wherein the mass ...

Embodiment 3

[0036] S1, the preparation of catalyst

[0037]Add 14.8g of magnesium nitrate and 10.65g of zirconium nitrate to 30mL of water and 100mL of ethanol to make a solution, add 1mol / L LiOH to the solution, the pH value is 10, reflux and aging for 36 hours, centrifuge, the precipitate is washed with water, dried overnight, in nitrogen Under the atmosphere, the precipitate was put into a muffle furnace and calcined at a high temperature of 800° C. for 3 hours to obtain a solid superbase catalyst C with a Li content of 1.1%.

[0038] S2, the preparation of biodiesel

[0039] 1) Add sodium hydroxide solution with a mass concentration of 20% to rapeseed oil, stir for 5 hours, separate layers, wash the upper liquid with 80°C distilled water until pH = 7, then add cyclohexane to reflux at 90°C for reaction 5h, and finally vacuum distillation to obtain refined rapeseed oil;

[0040] 2) After mixing methanol and refined rapeseed oil, add the catalyst prepared in step S1, wherein the mass ...

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PUM

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Abstract

The invention discloses a method for preparing biodiesel by solid superbase catalysis. A composite oxide solid superbase catalyst used has a small size, has a cubic shape and is not easy to agglomerate at high temperature. The catalyst has simple composition, high catalytic activity and simple preparation. When the catalyst is applied to various catalytic reactions, the catalyst is used in a smallamount and has no corrosion to a reactor, and the catalyst is an environmentally friendly catalyst. After the end of the reaction, the catalyst can be separated by centrifugation. The catalyst can bereused, the yield of the biodiesel is high, and can reach 96%, the preparation time is short, and the biodiesel meets the standard of European EN14214 biodiesel.

Description

technical field [0001] The invention belongs to the technical field of chemical industry. Specifically, the invention relates to a method for preparing biodiesel by solid superbase catalysis. Background technique [0002] The increasing depletion of petrochemical resources and environmental problems have become one of the most serious crises facing mankind. Over the past few decades, countries have been looking for an environmentally friendly energy that can replace fossil energy. Biodiesel has attracted extensive attention due to its biodegradable, non-toxic and renewable, free of sulfur and aromatic compounds, high cetane number, and high flash point. [0003] Biodiesel refers to vegetable oil (such as rapeseed oil, soybean oil, peanut oil, corn oil, rapeseed oil, etc.), animal oil (such as fish oil, lard, tallow, sheep oil, etc.), waste oil or microbial oil and methanol or ethanol Fatty acid methyl or ethyl esters formed by ester conversion. Biodiesel is a typical "gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00B01J23/04C10L1/02
CPCB01J23/04C10G3/44C10G2300/1014C10L1/02Y02E50/10Y02P30/20
Inventor 董秋月杨彩花
Owner 杭州更蓝生物科技有限公司
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