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Centrifugal molecular distillating process of producing biological diesel for automobile

A molecular distillation and biodiesel technology, applied in the fields of hydrocarbon distillation, biological raw materials, biofuels, etc., can solve the problems of increasing equipment cost and processing cost, not being able to use high-end automobiles, reducing output rate, etc., and achieving evaporation rate and separation efficiency. The effect of reducing the risk of thermal decomposition and saving water treatment costs

Inactive Publication Date: 2007-03-21
SOUTH CHINA UNIV OF TECH +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The application of this production process mainly has the following problems: ① It is difficult to completely remove impurities by using a water washing process, and the content of fatty acid methyl esters in the product is relatively low, generally less than 95%, so it cannot meet the standards of biodiesel such as European emission III The fatty acid methyl ester content is greater than the requirement of 98%, so it is difficult to promote the application of biodiesel, and it cannot be used in high-end automobiles, but can only be used in industries with relatively low requirements such as industrial boilers and agricultural machinery; A large amount of waste water not only causes serious pollution to the environment, but also wastes water resources, which does not meet the current environmental protection requirements; ③After washing, the product needs to be dried through a drying tower, which increases equipment costs and processing costs; ④The washing process removes most of the Impurities (methanol, glycerin, etc.) also take away part of the methyl esters, reducing the yield

Method used

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  • Centrifugal molecular distillating process of producing biological diesel for automobile
  • Centrifugal molecular distillating process of producing biological diesel for automobile
  • Centrifugal molecular distillating process of producing biological diesel for automobile

Examples

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Effect test

Embodiment 1

[0028] Adopt coconut oil and methanol to carry out esterification, the molar ratio of coconut oil and methanol is 1:6. As shown in Figure 2, 800ml of the intermediate product after the reaction enters the buffer tank 1, and then enters the degassing column 2. The degassing temperature is 60°C and the vacuum degree is 5000Pa; the degassed product enters the first-stage centrifugal molecular still 3 for separation Excess methanol in the esterification reaction, the temperature is 80°C, the vacuum is 1000Pa, and the rotating speed of the turntable is 1.200rpm; then enters the second stage centrifugal molecular still 4 to separate glycerin, the temperature is 120°C, the vacuum is 100Pa, and the rotating speed is 1.200rpm 1400rpm; finally enter the third-stage molecular distillation tower 5 to separate 420g of methyl ester, the temperature is 180°C, the vacuum degree is 0.1Pa, the rotation speed of the turntable is 1200rpm, and the remaining impurities are discharged. After testing...

Embodiment 2

[0030] The esterification reaction is carried out by using tallow and ethanol, and the molar ratio of tallow and ethanol is 1:6.5. As shown in Figure 2, 750ml of the intermediate product after the reaction enters the buffer tank 1, and then enters the degassing column 2. The degassing temperature is 100°C and the vacuum degree is 1000Pa; the degassed product enters the first-stage centrifugal molecular still 3 to separate the ester The remaining ethanol in the chemical reaction, the temperature is 150°C, the vacuum is 100Pa, and the rotating speed of the turntable is 600rpm; then enter the second stage centrifugal molecular still 4 to separate glycerin, the temperature is 250°C, the vacuum is 10Pa, and the rotating speed of the turntable is 800rpm; Finally, enter the third-stage centrifugal molecular distillation tower 5 to separate 405 grams of ethyl ester. The temperature is 250° C., the vacuum degree is 1 Pa, the rotation speed of the rotating disk is 800 rpm, and the remain...

Embodiment 3

[0032] Rapeseed oil and methanol are used for the esterification reaction, and the molar ratio of rapeseed oil to methanol is 1:7. As shown in Figure 2, after the reaction, 700ml of the intermediate product enters the buffer tank 1, and then enters the degassing column 2. The degassing treatment temperature is 80°C and the vacuum degree is 3000Pa; the degassed product enters the first stage centrifugal molecular still 3 for separation The remaining methanol in the esterification reaction is at a temperature of 110°C, a vacuum of 500Pa, and a turntable speed of 1000rpm; then enters the second-stage centrifugal molecular still 4 to separate glycerol at a temperature of 180°C, a vacuum of 50Pa, and a turntable speed of 1200rpm Finally enter the third-stage centrifugal molecular distillation tower 5 to separate 370 grams of methyl esters, the temperature is 230 ° C, the vacuum is 25 Pa, the rotating speed of the turntable is 600 rpm, and the remaining impurities are discharged. Af...

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Abstract

The centrifugal molecular distilling process for producing biological diesel oil for automobile includes the following steps: 1. esterification of vegetable oil and / or animal oil; and 2. centrifugal molecular distillation of the esterification product to produce biological diesel oil for automobile. The centrifugal molecular distillation of the esterification product includes at least two stages, the front stage has treating temperature of 50-150 deg.c, vacuum degree of 10-5000 Pa and turntable speed of 600-1400 rpm, and separats out glycerin and methanol or ethanol; and the latter stage has treating temperature of 180-280 deg.c, vacuum degree of 0.1-50 Pa, and turntable speed of 300-1400 rpm, and separates out methyl ester or ethyl ester. The produced biological diesel oil has purity up to 98 % and is suitable for use in automobile. The process without water washing and drying step is simple, water saving and no waste water pollution.

Description

technical field [0001] The invention relates to the field of biochemical separation, in particular to the refining, purification and separation of biodiesel for automobiles. Background technique [0002] With the overexploitation of petroleum resources, the development of biodiesel for automobiles has great commercial prospects. At present, the technology usually adopted in the domestic production of biodiesel (methyl ester) for internal combustion engines is as follows: [0003] Esterification reaction to obtain intermediate products → static layering → taking the upper layer → washing with water → drying tower → product (biodiesel). [0004] The application of this production process mainly has the following problems: ① It is difficult to completely remove impurities by using a water washing process, and the content of fatty acid methyl esters in the product is relatively low, generally less than 95%, so it cannot meet the standards of biodiesel such as European emission ...

Claims

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Application Information

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IPC IPC(8): C10G7/00C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 朱宝璋杨婉珍陈建华
Owner SOUTH CHINA UNIV OF TECH
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