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Method of producing biological diesel oil using molecular distillation technology

A molecular distillation and biodiesel technology, applied in hydrocarbon distillation, biological raw materials, biofuels, etc., can solve the problems of unsatisfactory product quality, low product purity, waste of water resources, etc., and save water treatment costs and technological processes. Simple, no waste water pollution effect

Inactive Publication Date: 2006-11-29
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Mainly there are the following major problems with this production process: 1., adopt water washing, be difficult to thoroughly remove impurity, product purity is not high (generally less than 95%), and product quality does not reach European state discharge III standard index, therefore makes biodiesel difficult Popularization and application; ② A large amount of wastewater is produced in the washing process, which not only causes serious pollution to the environment, but also wastes water resources, which does not meet the current environmental protection requirements; ③ After washing, the product needs to be dried through a drying tower, which increases equipment costs and processing costs ;④The water washing process removes most of the impurities (methanol, glycerin, etc.), and also takes away part of the methyl ester, which reduces the output rate

Method used

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  • Method of producing biological diesel oil using molecular distillation technology
  • Method of producing biological diesel oil using molecular distillation technology
  • Method of producing biological diesel oil using molecular distillation technology

Examples

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Embodiment 1

[0021] Coconut oil and methanol are used for esterification reaction, the esterification reaction product is stratified at rest, and the upper layer (crude methyl ester) is taken into buffer tank 1, such as figure 2 As shown, it then enters the degassing column 2 with a degassing temperature of 60°C and a vacuum degree of 5000 Pa; after degassing, the product enters the first-stage molecular distillation column 3 to separate the remaining methanol from the esterification reaction at a temperature of 80°C and a vacuum degree of 1000Pa; finally enter the second-stage molecular distillation tower 4 to separate the methyl ester, the temperature is 180°C, the vacuum degree is 50Pa, and the remaining impurities are discharged.

Embodiment 2

[0023] Use tallow and ethanol to carry out the esterification reaction, the esterification reaction product is stratified at rest, and the upper layer (crude ethyl ester) is taken into the buffer tank 1, such as figure 2 As shown, it then enters the degassing column 2 for degassing at a temperature of 100°C and a vacuum of 1000 Pa; after degassing, the product enters the first-stage molecular distillation tower 3 to separate the remaining ethanol from the esterification reaction at a temperature of 150°C and a vacuum of 100Pa; finally enter the second-stage molecular distillation tower 4 to separate the ethyl ester, the temperature is 280°C, the vacuum degree is 1Pa, and the remaining impurities are discharged.

Embodiment 3

[0025] Rapeseed oil and methanol are used for the esterification reaction, the esterification reaction product is roughly separated by high-speed centrifugation, and the crude methyl ester is taken into the buffer tank 1, such as figure 2 As shown, it then enters the degassing column 2 and the degassing temperature is 80°C, and the vacuum degree is 3000 Pa; after degassing, the product enters the first-stage molecular distillation column 3 to separate the remaining methanol from the esterification reaction, the temperature is 110°C, and the vacuum degree is 500Pa; finally enter the second-stage molecular distillation tower 4 to separate the methyl ester, the temperature is 230°C, the vacuum degree is 25Pa, and the remaining impurities are discharged.

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Abstract

The invention discloses a method used molecular distillation technique to produce biological diesel oil. It uses vegetable or animal oil as material to do esterifying reaction. The product is processed by crude separation and molecular distillation to make diesel oil. The invention realizes biological oil purification and refine. And the purity can reach over 98%. Its technological process is simple. And it has no waste water pollution. Thus it can save water treatment cost.

Description

Technical field [0001] The invention relates to the field of biochemical separation, in particular to the purification, purification and separation of biodiesel. Background technique [0002] The development of biodiesel industry benefits the country and the people. At present, the production process adopted by most domestic biodiesel manufacturers generally has too long reaction time, low reaction completion rate, relatively low content of fatty acid methyl esters (about 95%), high content of monoglycerides, etc. The fatty acid methyl ester content of biodiesel is less than the requirement of 98% in the European Emission III standard. Therefore, most of the biodiesel cannot be used in high-end automobiles, but used in industrial boilers, agricultural machinery and other relatively low-demand industry. However, in foreign biodiesel production, in addition to the reaction (esterification) process, multiple steps of separation and purification are required to complete the applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G7/00C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 朱宝璋杨婉珍黄少烈
Owner SOUTH CHINA UNIV OF TECH