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Method for preparing biodiesel by catalysizing cotton seed oil by organic alkali

A technology of biodiesel and cottonseed oil, which is applied in the preparation of biological raw materials, biofuels, liquid hydrocarbon mixtures, etc., can solve the problems of long reaction time, high enzyme price, easy inactivation, etc., and achieves reduced reaction time and high conversion rate. , the effect of convenient operation

Inactive Publication Date: 2009-07-01
上海融新能源环境科技有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biological enzyme method has attracted attention because of its low pollution and simple post-treatment process, but the price of the enzyme itself is high, and it is easy to inactivate, the reaction time is long, and the energy consumption is large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put 90g of cottonseed oil and 15g of tetrahydrofuran into the reactor after removing impurities with 10% sodium hydroxide solution and vacuum dehydration at 60°C, then dissolve 1.8g of TBD into 19.2g of methanol and pour into the reactor Stir in the middle, carry out transesterification reaction at 30 ℃, after reacting for 60 minutes, stand at room temperature for 4 hours, separate the glycerol layer, and steam the excess methanol and catalyst from the upper layer to obtain 54 g of biodiesel, with a yield of 61.1%.

Embodiment 2

[0019] Put 90g of cottonseed oil and 15g of tetrahydrofuran into the reactor after removing impurities with 20% sodium hydroxide solution and vacuum dehydration at 90°C, then dissolve 1.8g of TBD into 19.2g of methanol and pour into the reactor Stir in the middle, carry out transesterification reaction at 45 ℃, after reacting for 30 minutes, stand at room temperature for 6 hours, separate the glycerol layer, and steam the excess methanol and catalyst from the upper layer to obtain 80 g of biodiesel with a yield of 88.9%.

Embodiment 3

[0021] Put 90g of cottonseed oil and 15g of tetrahydrofuran into the reactor after removing impurities with 15% sodium hydroxide solution and vacuum dehydration at 75°C, then dissolve 1.8g of TBD into 19.2g of methanol and pour into the reactor Stir in the middle, carry out transesterification reaction at 60 ℃, after reacting for 60 minutes, stand at room temperature for 5 hours, separate the glycerol layer, and steam the excess methanol and catalyst from the upper layer to obtain 85 g of biodiesel with a yield of 94.4%.

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Abstract

The invention discloses a method for producing biodiesel by using an organic base to catalyze cottonseed oil, which comprises the following steps: using crude cottonseed oil as a raw material, removing impurities, heating the raw material and performing vacuum dehydration; adding methanol, adding 1,5,7-trisazoheterobicyclo-[4,4,0]-5-decylene (TBD) as a catalyst, adding tetrahydrofuran as a cosolvent, and performing an interesterification reaction in a reactor under stirring. After the reaction, the mixture is kept stand to separate out a glycerin layer, and superfluous methanol and catalyst are distilled out to obtain the finished product. The method has simple process and convenient operation, adopts the cosolvent to speed up the reaction, reduce the reaction time and reduce the energy consumption, and has high conversion efficiency. The obtained biodiesel has the advantages of high flash point, high cetane number, and safe transportation, storage and use.

Description

technical field [0001] The invention relates to the fields of crude oil refining and renewable energy, in particular to a method for preparing renewable energy—biodiesel from vegetable oil, in particular to a method for preparing biodiesel from cottonseed oil catalyzed by an organic base. Background technique [0002] With the gradual depletion of oil resources and the rise of oil prices, countries all over the world are looking for renewable energy. Biodiesel has attracted people's attention for its renewable and environmental protection. Vegetable oil has attracted people's attention because it has the same carbon chain as petrochemical diesel, but its high viscosity and other reasons limit its application in engines. The disadvantages mentioned above are overcome by turning vegetable oil into fatty acid methyl ester through transesterification, which is the so-called biodiesel. [0003] At present, the raw materials of biodiesel mainly use edible oils such as rapeseed oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 李建平温鹏飞罗传奎
Owner 上海融新能源环境科技有限公司
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