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Method for preparing -20 DEC C biodiesel from waste lipid by distillation process

A biodiesel and waste oil technology, applied in the preparation of biological raw materials, biofuels, liquid hydrocarbon mixtures, etc., can solve problems such as affecting the use of biodiesel, blocking oil circuits, etc., and achieves no loss of parts, easy operation, and yield. high effect

Inactive Publication Date: 2009-05-27
XIANGTAN ZHAOSHAN LIPID SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the temperature is lower than 10°C, the components with high freezing point in biodiesel will solidify into white solids and precipitate, which will block the oil circuit when used in diesel engines and affect the use of biodiesel in winter

Method used

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  • Method for preparing -20 DEC C biodiesel from waste lipid by distillation process
  • Method for preparing -20 DEC C biodiesel from waste lipid by distillation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A. The composition of raw materials is (volume unit):

[0030] Oil 100 parts

[0031] Methanol 15 parts

[0032] 0.4 parts of sulfuric acid

[0033] 0.25 parts of soda ash.

[0034] B. Steps for preparing -20# biodiesel:

[0035] I. Process flow

[0036] Material selection—hydrolysis—fractionation—esterification—neutralization—dealcoholization—rectification—finished product;

[0037] II. Operation steps

[0038] ①Choose waste animal and vegetable fats and oils as raw materials and clear water, and put them into a countercurrent hydrolysis tower for hydrolysis;

[0039] ②The hydrolysis reaction temperature is 210°C, the pressure is 2.5MPa, the ratio of oil to water is 1:0.4, and the reaction time is 8 hours, and the crude fatty acid and glycerin aqueous solution are separated;

[0040] ③ Take the above-mentioned crude fatty acid and put it into a fractionation tower for fractionation. The reaction conditions are that the vacuum residual pressure in the tower is <2...

Embodiment 2

[0045] A. The composition of raw materials is (volume unit):

[0046] Oil 100 parts

[0047] Methanol 14.5 parts

[0048] 0.4 parts of sulfuric acid

[0049] 0.25 parts of soda ash.

[0050] B. Steps for preparing -20# biodiesel:

[0051] I. Process flow

[0052] Material selection—hydrolysis—fractionation—esterification—neutralization—dealcoholization—rectification—finished product;

[0053] II. Operation steps

[0054] ①Choose waste animal and vegetable oils as raw materials and put water into the oil countercurrent hydrolysis tower for hydrolysis;

[0055] ②The hydrolysis reaction temperature is 215°C, the pressure is 2.55MPa, the ratio of oil to water is 1:0.45, and the reaction time is 7 hours, and the crude fatty acid and glycerin aqueous solution are separated;

[0056] ③ Take the above-mentioned crude fatty acid and put it into a fractionation tower for fractionation. The reaction conditions are that the vacuum residual pressure in the tower is less than 2 mm Hg...

Embodiment 3

[0061] A. The composition of raw materials is (volume unit):

[0062] Oil 100 parts

[0063] Methanol 13.5 parts

[0064] 0.35 parts of sulfuric acid

[0065] 0.22 parts of soda ash.

[0066] B. Steps for preparing -20# biodiesel:

[0067] I. Process flow

[0068] Material selection—hydrolysis—fractionation—esterification—neutralization—dealcoholization—rectification—finished product;

[0069] II. Operation steps

[0070] ①Choose waste animal and vegetable fats and oils as raw materials and clear water, and put them into a countercurrent hydrolysis tower for hydrolysis;

[0071] ②The hydrolysis reaction temperature is 225°C, the pressure is 2.65MPa, the ratio of oil to water is 1:0.46, and the reaction time is 5.5 hours, and the crude fatty acid and glycerin aqueous solution are separated;

[0072] ③ Take the above-mentioned crude fatty acid and put it into a fractionation tower for fractionation. The reaction conditions are that the vacuum residual pressure in the tower ...

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Abstract

The invention relates to a process for preparing -20# biodiesel from waste lipin based on a rectification process. The waste lipin is used as a raw material and is added with methanol and other catalysts for reaction to prepare a product through a six-step method of material selection, hydrolysis, fractionation, esterification, neutralization, dealcoholization and rectification; the process overcomes the disadvantages that biodiesel produced through the prior preparation method has low output, few breeds and poor performance and can not be suitable for a low-temperature environment, enlarges the functions of the prior biodiesel, provides a new approach for the production of new breeds of the biodiesel; the product has stable performance and good applicability, does not solidify between room temperature and 20 DEG C below zero, can be freely mixed with diesel, has no toxicity or corrosion performance, does not damage a mechanical part, is easy to biodegrade, is environment-friendly, can be used for all weather, has high boiling point and flash point, belongs to non-dangerous goods and has safe storage and transportation and huge commercial potential; and the method is suitable for the production of preparing biodiesel with low freezing point through using the waste lipin as the main material.

Description

technical field [0001] The invention relates to a method for preparing -20# biodiesel, in particular to a method for preparing -20# biodiesel from waste oil based on a rectification process. Background technique [0002] The main components of biodiesel produced from animal and vegetable oils are methyl palmitate, methyl stearate, methyl oleate, and methyl linoleate. Due to differences in oil varieties, origins, climates, etc., the components of various fatty acids in them are very different. Therefore, the components and freezing point of biodiesel are also very different. Among them, the freezing point of methyl palmitate: 28.5℃~29.5℃, the freezing point of methyl stearate: 37℃~38℃, the freezing point of methyl oleate: -19.5℃~-20.5℃, the freezing point of linoleic acid Freezing point of methyl ester: -34℃~-35℃. When the temperature is lower than 10°C, the components with high freezing point in biodiesel will solidify into white solids and precipitate, which will block th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 何关印陈玉成
Owner XIANGTAN ZHAOSHAN LIPID SCI & TECH
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