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A kind of technique of biodiesel transesterification reaction

A technology of exchange reaction and diesel ester, which is applied in the field of fatty acid esters, can solve the problems of high energy consumption, low conversion rate, long reaction time, etc., and achieve the effect of full reaction, increased conversion rate and shortened reaction time

Inactive Publication Date: 2015-12-23
江苏悦达卡特新能源有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the domestic biodiesel production process is realized by two-step reaction, and then purified by distillation. Since the transesterification reaction is a heterogeneous reaction, the reaction time is long, the conversion rate is low, and the energy consumption is high.

Method used

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  • A kind of technique of biodiesel transesterification reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0017] Take 100 kg of esterified waste oil (average molecular weight 900), 6 kg of anhydrous methanol, and 40 grams of sodium hydroxide; feed the waste oil, anhydrous methanol, and sodium hydroxide into the reactor, stir and heat, and the reactor gradually Pressurize to 0.8MPa, then the temperature rises to 150°C, react for 30 minutes, and finally obtain 99.506 kg of biodiesel through distillation.

Embodiment 2）

[0019] Take 100 kg of esterified waste oil (average molecular weight 900), 6 kg of anhydrous methanol, and 40 grams of sodium hydroxide; feed the waste oil, anhydrous methanol, and sodium hydroxide into the reactor, stir and heat, and the reactor gradually Pressurize to 0.85MPa, then the temperature rises to 155°C, react for 30 minutes, then distill and finally obtain 99.602 kg of biodiesel.

Embodiment 3）

[0021] Take 100 kg of esterified waste oil (average molecular weight 900), 6 kg of anhydrous methanol, and 40 grams of sodium hydroxide; feed the waste oil, anhydrous methanol, and sodium hydroxide into the reactor, stir and heat, and the reactor gradually Pressurize to 0.83MPa, then the temperature rises to 155°C, react for 30 minutes, and finally obtain 99.505 kg of biodiesel through distillation.

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Abstract

The invention relates to a technology for making grease into fatty acid ester, especially to a biodiesel transesterification technology. The transesterification is a reaction of grease in the presence of a catalyst. The catalyst used in the transesterification is sodium hydroxide. The reaction temperature is 150-155 DEG C, and the reaction pressure is 0.8-0.85 MPa. Due to the accurate pressure and temperature design, the reaction system is a homogeneous system, and the reaction time is greatly shortened. The reaction is complete. In comparison with the conversion rate of a traditional technology being 90-95%, the conversion rate of the technology provided by the invention has a great breakthrough and reaches more than 99.5%.

Description

technical field [0001] The invention relates to a process for preparing oil into fatty acid ester, in particular to a biodiesel transesterification process. Background technique [0002] Biodiesel refers to a renewable diesel fuel that can replace petrochemical diesel oil, which is made from oil crops, wild oil plants, engineering microalgae and other aquatic vegetable oils, animal oils, and catering waste oils through transesterification processes. Biodiesel is a kind of biomass energy, which is a mono-alkyl ester of long-chain fatty acid obtained from biomass by pyrolysis and other technologies. Biodiesel is a mixture of complex organic components with extremely high oxygen content. These mixtures are mainly organic compounds with large molecular weight, including almost all kinds of oxygen-containing organic compounds, such as ethers, aldehydes, ketones, phenols, organic acids, alcohols, etc. Composite biodiesel is synthesized by using waste animal and vegetable oil, was...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00C11C3/10C10L1/02
CPCY02E50/10Y02P30/20
Inventor 张伟明杨锦梁肖达明石昌富许梅芳谢芬
Owner 江苏悦达卡特新能源有限公司
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