A method for improving biodiesel yield and reducing ester content in residual oil

A technology for biodiesel and residual oil, applied in the distillation control/regulation of hydrocarbon oil, etc., can solve the problems of increasing the acid value of biodiesel, reducing the yield of biodiesel, cracking of biodiesel, etc., so as to increase the volatility and reduce the Ester content, the effect of reducing the volatilization temperature

Inactive Publication Date: 2018-10-30
云南盈鼎生物能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of method consumes a lot of energy, which will cause biodiesel cracking, increase the acid value of biodiesel, and reduce the ester content; on the other hand, biodiesel remains in the residual oil, which reduces the yield of biodiesel

Method used

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  • A method for improving biodiesel yield and reducing ester content in residual oil

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Embodiment 1

[0023] A method for improving biodiesel yield and reducing ester content in residual oil, comprising the steps of:

[0024] (1) Distillation produces residual oil, light components, and biodiesel fractions;

[0025] (2) Real-time measurement of residual oil density, real-time measurement of light component content, and real-time measurement of biodiesel content;

[0026] (3) Judging that the content of light components reaches the specified value, that is, the content of undecyl carbon is less than 0.5%, then the light components are collected outside; if the content, density, acid value, sulfated ash, and chroma of biodiesel esters are determined to reach the national standard, then Biodiesel mining;

[0027] (4) Determine the density of residual oil to determine whether the volatility is appropriate:

[0028] A. If the density and volatility of the residual oil are suitable, continue to distill and repeat steps (1), (2) and (3);

[0029] B. If the density of the residua...

Embodiment 2

[0036] A method for improving biodiesel yield and reducing ester content in residual oil, comprising the steps of:

[0037] (1) Distillation produces residual oil, light components, and biodiesel fractions;

[0038] (2) Real-time measurement of residual oil density, real-time measurement of light component content, and real-time measurement of biodiesel content;

[0039] (3) Judging that the content of light components reaches the specified value, that is, the content of undecyl carbon is less than 0.5%, then the light components are collected outside; if the content, density, acid value, sulfated ash, and chroma of biodiesel esters are determined to reach the national standard, then Biodiesel mining;

[0040] (4) Determine the density of residual oil to determine whether the volatility is appropriate:

[0041] A. If the density and volatility of the residual oil are suitable, continue to distill and repeat steps (1), (2) and (3);

[0042] B. If the density of the residua...

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Abstract

The invention belongs to the fields of petrochemical engineering, new energy, waste oil and fat comprehensive utilization, biodiesel production, fine chemical engineering rectification and the green chemical industry, and particularly relates to a method for increasing the yield of biodiesel and reducing the ester content in residual oil. The method includes the steps that whether volatility is proper or not is judged by determining the density of residual oil, if the density and the volatility of the residual oil are proper, distillation continues, if the density of the residual oil is larger than a specified value, volatility is insufficient, part of light components obtained through reaction are preheated, the preheated light components are added into a reaction system to improve the volatility of the residual oil, and distillation continues. According to tests and by means of a conventional method, it is detected that the yield of biodiesel is 80-85%, the biodiesel content in the residual oil reaches 10%, and the biodiesel content in the light components reaches 70-80%. By means of the method, the undecane ester content in the light components is smaller than 0.5%, the docosane ester content in the residual oil is smaller than 0.5%, and the biodiesel yield reaches 90-94%.

Description

technical field [0001] The invention belongs to the fields of petrochemical industry, new energy, comprehensive utilization of waste oil, biodiesel production, fine chemical distillation, and green chemical industry, and specifically relates to a method for increasing biodiesel yield and reducing ester content in residual oil. Background technique [0002] As a clean and renewable energy source, biodiesel can be made from non-edible oils and fats such as Pistacia chinensis and Jatropha (jatropha seeds), waste oils such as gutter oil, swill oil, and acidified oil. During the distillation process of biodiesel, a residual oil (that is, vegetable asphalt) will be produced. With the reduction of light components, the volatility of heavy components is not enough to form residual oil. The residual oil contains 5%~10% biodiesel. In order to increase the yield of biodiesel, the traditional method is to increase the temperature of the distillation bottom, increase the vacuum degree, m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G7/12
CPCC10G7/12
Inventor 冀星吕勃崔建志张钰王继刚李里虎王书平冀旌语
Owner 云南盈鼎生物能源股份有限公司
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