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Denitrogenation method for biodiesel

A biodiesel, denitrification technology, applied in biofuel, petroleum industry, fat production, etc., can solve the problem of high consumption of hydrogen, and achieve the effect of easy operation

Active Publication Date: 2013-09-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the method of the above-mentioned patent application has a significant denitrification effect, the method needs to consume a large amount of hydrogen, and needs to be implemented at high temperature and high pressure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This example is used to illustrate the denitrification method of biodiesel provided by the present invention.

[0020] 100 parts by weight of nitrogen-containing biodiesel (nitrogen content is 160ppm) prepared by transesterification reaction of 93% by weight triglyceride content, acid value 12mg KOH / g oil and methyl alcohol, to the nitrogen-containing biodiesel Add 7 parts by weight of formic acid to the biodiesel, stir and mix for 10 minutes at 40°C at a speed of 200 rpm, then let stand for 15 minutes, separate the upper oil phase, wash the oil layer with water, and leave it standing. The upper layer obtained by stratification is biodiesel, the nitrogen content of the biodiesel is 71ppm, and the denitrification rate is 55.6%.

Embodiment 2

[0022] This example is used to illustrate the denitrification method of biodiesel provided by the present invention.

[0023] 100 parts by weight of nitrogen-containing biodiesel (nitrogen content is 111ppm) prepared by transesterification reaction of 91% by weight triglyceride content, acid value 5mgKOH / g degenerated oil and methanol, to the nitrogen-containing biodiesel Add 5 parts by weight of formic acid to the biodiesel, stir and mix for 10 minutes at 30° C. at a speed of 200 rpm, then let stand and separate layers for 15 minutes. The upper layer oil phase was separated, and after the oil layer was washed with water and allowed to stand, the upper layer obtained by stratification was biodiesel, the nitrogen content of the biodiesel was 67ppm, and the denitrification rate was 44.6%.

Embodiment 3

[0025] This example is used to illustrate the denitrification method of biodiesel provided by the present invention.

[0026] 100 parts by weight of biodiesel (nitrogen content is 1200ppm) containing alcohol amines material that is 68 weight percent by triglyceride content, acid value 60mg KOH / g degenerated oil and methyl alcohol carry out transesterification reaction to make Add 9 parts by weight of acetic acid to the nitrogen-containing biodiesel, stir and mix for 10 minutes at 40° C. at a speed of 200 rpm, then let stand for 15 minutes to separate the upper oil phase, which is washed with water, statically After placing, the upper layer obtained by stratification is biodiesel, the nitrogen content of the biodiesel is 161ppm, and the denitrification rate is 86.6%.

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Abstract

The present invention provides a denitrogenation method for biodiesel. The method comprises that: nitrogen-containing biodiesel contacts an organic carboxylic acid, the product generated from the contacting is layered to form a biodiesel phase and an organic carboxylic acid phase, the biodiesel is recovered, wherein the nitrogen content in the recovered biodiesel is reduced, the organic carboxylic acid is the carboxylic acid with carbon atoms of 1-7. According to the method of the present invention, the nitrogen content in the biodiesel can be effectively reduced so as to improve the quality of the biodiesel product.

Description

technical field [0001] The invention relates to a method for denitrifying biodiesel. Background technique [0002] The molecular weight and properties of biodiesel are very close to those of mineral diesel, and it can replace mineral diesel as a fuel for diesel engines. Biodiesel contains almost no aromatics, high cetane number, good lubricating performance, high flash point, non-toxic, convenient and safe for storage and transportation, and good degradation performance, so it is a high-quality clean fuel, and biodiesel can also be used as High value-added fine chemical raw materials. [0003] Usually, the preparation method of biodiesel can comprise making oil and monohydric alcohol carry out transesterification reaction, and make the material (containing glycerin, fatty acid methyl ester, monoglyceride, diglyceride and fat) after the transesterification reaction be rectified under reduced pressure tower or distillation tower, and collect the distillate from the top of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B3/04C11B3/00C10L1/02
CPCY02E50/13Y02E50/10
Inventor 王海京杜泽学宗保宁闵恩泽高国强
Owner CHINA PETROLEUM & CHEM CORP