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Continuous biological diesel oil preparing process

A biodiesel and oil technology, applied in the preparation of biological raw materials, biofuels, liquid hydrocarbon mixtures, etc., can solve the problems of increasing the complexity of the post-processing process, affecting the purity of the reaction product, and unstable product quality, and achieving the production separation process. Simple, low production cost and high production efficiency

Inactive Publication Date: 2006-03-01
TSINGHUA UNIV
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN 1626621A proposes the method of adding a co-solvent. Although the reaction temperature is reduced to a certain extent, this will affect the purity of the reaction product and increase the complexity of the post-treatment process of the reaction product, and increase the production cost due to the use of a co-solvent
[0004] At present, almost all of the processes based on the above methods are batch methods to prepare biodiesel, which has low production efficiency and unstable product quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The coil reactor 7 was heated to 320°C, and the coil preheater 5 was heated to 100°C. Adjust the pressure control valve 9 to make the pressure in the reactor 32MPa. Methanol 2 and soybean oil 1 are simultaneously pumped into a coil preheater 5 with a volume of 75 ml by high-pressure advection pumps 3 and 4 at a flow rate of 2 ml / min and 1 ml / min (molar ratio 40:1) for preheating, After being preheated to 100°C, it is mixed by the mixer 6 and then entered into the coil reactor 7 with a volume of 75mL. The temperature of the reaction material is gradually heated from 100°C to 320°C, and a 100°C gap is formed between the inlet and outlet of the reactor. Stepwise temperature gradient up to 320 °C. After 25 minutes of reaction, the reaction material is cooled by the cooler 8, and the product is separated by the product separation tank 10 to produce biodiesel with a fatty acid methyl ester content of more than 97%.

Embodiment 2

[0034] The coil reactor 7 was heated to 350°C, and the coil preheater 5 was heated to 200°C. Adjust the pressure control valve 9 to make the pressure in the reactor 16MPa. Methanol 2 and soybean oil 1 are simultaneously pumped into a coil preheater 5 with a volume of 75 ml by high-pressure advection pumps 3 and 4 at a flow rate of 5.5 ml / min and 2 ml / min (molar ratio 55:1) respectively for preheating , after preheating to 200°C, mixed by the mixer 6 and then entering the coil reactor 7 with a volume of 75mL, the temperature of the reaction material is gradually heated from 200°C to 350°C, forming a 200°C between the inlet and the outlet of the reactor °C step by step up to 350 °C temperature gradient. After 10 minutes of reaction, the reaction material is cooled by the cooler 8, and the product is separated by the product separation tank 10 to produce biodiesel with a fatty acid methyl ester content of more than 94%.

Embodiment 3

[0036]The coil reactor 7 was heated to 280°C, and the coil preheater 5 was heated to 30°C. Adjust the pressure control valve 9 to make the pressure in the reactor be 32MPa. Methanol 2 and soybean oil 1 are simultaneously pumped into a coil preheater 5 with a volume of 75 ml by high-pressure advection pumps 3 and 4 at a flow rate of 3 ml / min and 1 ml / min (molar ratio 60: 1) for preheating, After preheating to 30°C, it is mixed by the mixer 6 and then enters the coil reactor 7 with a volume of 75mL. The temperature of the reaction material is gradually heated from 30°C to 280°C, and a 30°C gap is formed between the reactor inlet and outlet. Stepwise temperature gradient up to 280 °C. After 19 minutes of reaction, the reaction material is cooled by the cooler 8, and the product is separated by the product separation tank 10 to produce biodiesel with a fatty acid methyl ester content of more than 95%.

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PUM

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Abstract

The continuous biological diesel oil preparing process converts regenerable plant oil and grease into biological diesel oil under the sub-critical, critical and supercritical state of short-chain alcohol as acyl radical acceptor, and belongs to the field of biological oil synthesizing technology. The process includes heating the pipe preheater and pipe reactor to set temperature, pumping short-chain alcohol and plant oil and grease with high pressure pumps into the pipe preheater for mixing and the pipe reactor for reaction of 10-40 min, cooling and separating, and can produce biological diesel oil continuously. The reaction system has no impurity introduced, so that its side product coarse glycerin may be refined easily to obtain pure glycerin product. The present invention has the advantages of environment friendship, simple separation process, low cost, high efficiency, great output, stable product quality, etc.

Description

technical field [0001] The invention relates to a method for continuously preparing biodiesel, in particular to a method for converting renewable vegetable oils into biofuels by using short-chain alcohols as acyl acceptors in the near-critical, critical and supercritical states of short-chain alcohols A method for continuously preparing biodiesel belongs to the field of bio-oil synthesis. Background technique [0002] Long-chain fatty acid esters produced by transesterification of animal and vegetable oils are a new type of pollution-free and renewable green energy, now called biodiesel. Its combustion performance has been proved by practice to be very close to traditional petrochemical diesel and can be used as an alternative fuel for petrochemical diesel. Because biodiesel has many advantages compared with petrochemical diesel, especially the significant reduction of environmental pollution and rapid regeneration, the research and application of biodiesel has been widely ...

Claims

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Application Information

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IPC IPC(8): C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 朱慎林贺华阳王涛杨基础
Owner TSINGHUA UNIV
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