Ester exchange reaction method and device thereof in production of biodiesel

A technology of transesterification and biodiesel, which is applied in the direction of biological raw materials, biofuels, petroleum industry, etc., can solve the problems of high energy consumption and investment, difficulty in realization, high alcohol/oil ratio of reactor feed, and reduce infrastructure investment , Reduce production cost, high production efficiency

Inactive Publication Date: 2010-01-13
程文波
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the reaction pressure of this process is 15MPa ~ 20Mpa. Because of the use of tubular reactors, it is generally not very difficult to realize industrially. The disadvantage is that a high temperature heat source of 350°C ~ 400°C is required, and the reactor feed alcohol / oil ratio High, energy consumption and investment are also high

Method used

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  • Ester exchange reaction method and device thereof in production of biodiesel
  • Ester exchange reaction method and device thereof in production of biodiesel

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Effect test

Embodiment 1

[0031] Oil plant: the animal fat of acid value 1.2mgKOH / g does not need pre-esterification, and methanol is continuously added to the mixing tank 4 with a molar ratio of 1: 5, and the catalyst NaOH and methanol solution of 5% concentration are mixed with 0.05% (to the oil plant) The amount is added continuously. The pressure in the mixing tank 4 is 0.5-1.0Mpa, set the stirring at 120rpm, heat up to 65°C under stirring, fully mix the immiscible reactants with the catalyst NaOH solution, stay for 20min, leave the mixing tank 4, and go through static mixing The reactor 6 is continuously metered and transported by the feed pump 5 for the transesterification reaction, passes through the raw material preheater 7, and enters the combined transesterification reactor 8. The reaction material is heated by a heat carrier to reach a reaction temperature of 240°C, and then enters the continuation reactor 9 of three groups. The continuation reactor 9 is a pipe reactor with variable diameter...

Embodiment 2

[0034] Rancid rapeseed oil, acid value 12mgKOH / g, use common liquid sulfuric acid to carry out pre-esterification and alkali washing, after water washing, acid value is reduced to 1mgKOH / g, then carry out transesterification, reaction equipment, reaction conditions are all with embodiment 1 Same: add methanol and methanol in a molar ratio of 1:5 to the mixing tank continuously, and add 5% NaOH and methanol solution in an amount of 0.05% (to oil) continuously. The mixing tank is set with 120rpm stirring, and the temperature is raised to 65°C under stirring to fully mix the immiscible reactants with the catalyst, and stay for 20 minutes. After leaving the mixing tank, it passes through the static mixer 6 and is continuously metered by the transesterification feed pump 5 The material is conveyed through the raw material preheater 7 and enters the combined transesterification reactor 8. The reaction material is heated up to a reaction temperature of 240°C by heat carrier, and then ...

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Abstract

The invention relates to an ester exchange reaction method and a device thereof in the production of biodiesel. The steps are as follows: conveying oil, methanol and catalyst solution to an ester exchange raw material mixing tank for pre-esterification; after animal fat and vegetable oil going through the pre-esterification leave the raw material mixing tank and pass through a static mixer, continuously conveying the animal fat and the vegetable oil by an ester exchange reaction charge pump to enter an ester exchange combined reactor through a raw material preheater; and finally leading the materials in a continuous reactor for heat insulation ester exchange reaction. Compared with the prior art, the esterification product does not need to be neutralized and washed, thus reducing the discharge of sewage; continuous production is available, the production efficiency is high and the conversion rate of glyceride reaches 98.5 percent; and by adopting the continuous reactor in the device, the reaction volume is greatly decreased and the production investment is lowered.

Description

technical field [0001] The invention relates to a method for continuously preparing biodiesel, in particular to a method and a device for preparing biodiesel by a low-alkali methanol supercritical method. Background technique [0002] As a substitute for petroleum, biodiesel is a long-chain fatty acid ester produced from renewable biological resources—animal and vegetable oils through transesterification. Due to its characteristics of biodegradability, non-toxicity, low pollution discharge, and abundant production raw materials, it is imminent to develop and research this green and environmentally friendly fuel to replace the exhausted petroleum energy. In recent years, the research and application of biodiesel has made great progress in China. It is imperative to actively develop a continuous production process to replace the current intermittent production method with low production efficiency and small scale of production equipment. [0003] The main reaction of biodies...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00C11C3/10
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 程文波姚亚平
Owner 程文波
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