Method of removing soap and dissociative glycerin in biological diesel oil

A biodiesel and glycerin technology, which is applied in the preparation of biological raw materials, biofuels, and liquid hydrocarbon mixtures, etc., can solve the problems of limiting soap content, excessive engine emissions, affecting the performance of diesel engines, etc., and achieves the goal of reducing equipment investment and simplifying processes. Effect

Inactive Publication Date: 2007-08-08
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The soap content and free glycerin content in biodiesel directly affect the performance of diesel engines. The corresponding alkali metals will remain in the engine after soap combustion, and the presence of free glycerin will lead to excessive engine emissions.
Although the EU biodiesel standard EN142141 (Table 1) does not have an indicator of soap content, it has strict restrictions on the content of K, Na, Mg, and Ca, which limits the content of soap from another side

Method used

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  • Method of removing soap and dissociative glycerin in biological diesel oil
  • Method of removing soap and dissociative glycerin in biological diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 10Kg of crude biodiesel (free glycerin content 0.05%, K element content 25.2mg / kg, Na element content 217.6mg / kg) into the raw material tank, open the circulation pump, adjust the inlet and outlet valves, so that the ultrafiltration inlet pressure is 0.20MPa , The outlet pressure is 0.05MPa. A ceramic membrane with a pore size of 0.6 μm (the material of the membrane layer is alumina and the material of the support layer is ceramic) is used to cross-flow filter crude biodiesel at 40°C, the filtrate is collected, and the flux of the membrane is automatically recorded every 3 minutes. When the concentration ratio is 4:1, stop the pump. Determination of total filtrate K, Na element content is 1.4 and 3.25mg / kg, free glycerin content is 0.006%.

Embodiment 2

[0025] Add 10Kg of crude biodiesel (free glycerol content 0.261%, K element content 159.72mg / kg, Na element content 8.98mg / kg) into the raw material tank, open the circulation pump, adjust the inlet and outlet valves, so that the ultrafiltration inlet pressure is 0.26MPa , The outlet pressure is 0.06MPa. A ceramic membrane with a pore size of 0.2 μm (the material of the membrane layer is alumina and the material of the support layer is ceramic) is cross-flow filtered at 50°C for crude biodiesel, the filtrate is collected, and the flux of the membrane is automatically recorded every 3 minutes. When the concentration ratio is 6:1, stop the pump. Determination of total filtrate K, Na element content is 2.20 and 0.88mg / kg, free glycerin content is 0.0257%.

Embodiment 3

[0027] Add 10Kg of crude biodiesel (free glycerol content 0.364%, K element content 206.5mg / kg, Na element content 20.8mg / kg) into the raw material tank, open the circulation pump, adjust the inlet and outlet valves, so that the ultrafiltration inlet pressure is 0.30MPa , The outlet pressure is 0.08MPa. A ceramic membrane with a pore size of 0.1 μm (the material of the membrane layer is alumina and the material of the support layer is ceramic) is cross-flow filtered at 60°C for crude biodiesel, the filtrate is collected, and the flux of the membrane is automatically recorded every 3 minutes. When the concentration ratio is 8:1, stop the pump. Determination of total filtrate K, Na element content is 1.70 and 1.36mg / kg, free glycerin content is 0.0152%.

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Abstract

The invention discloses a making method of rough biological diesel, which is characterized by the following: adopting organic solvent, chemical property stable ceramic film to do micro-filter directly; removing trace soap and free glycerine without washing.

Description

technical field [0001] The invention relates to a method for refining biodiesel, especially a method for removing soap and free glycerin in biodiesel. Background technique [0002] Biodiesel is a renewable, environment-friendly energy source and a necessary supplement to petroleum diesel. In 2006, the EU's biodiesel production is expected to exceed 6.069 million tons, an increase of 91% over 2005. The EU plans to achieve biodiesel consumption accounting for 20% of total diesel consumption by 2020. my country is a country with insufficient oil production. In 2005, it imported 26.59 million tons of soybeans, and its per capita edible oil consumption was 15 kg, just reaching the world average level. At the present stage, my country's development of biodiesel industry cannot apply the model of the European Union and the United States to occupy a large amount of edible oil resources. A better way is to use acidified oil, hog oil, woody vegetable oil (such as jatropha seed oil)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G31/09C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 汪勇欧仕益谭艳来张志森
Owner JINAN UNIVERSITY
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