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Novel desulfurization method of biodiesel

A technology of biodiesel and a new method, which is applied to the removal of sulfur-containing compounds in biodiesel and the field of biodiesel desulfurization, can solve problems such as difficulties in desulfurization of biodiesel, and achieve the advantages of less equipment investment, stable oil quality and safe desulfurization process. Effect

Inactive Publication Date: 2017-01-18
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0005] In view of the current difficulty in desulfurization of biodiesel, the present invention provides a simple and efficient new method for desulfurization of biodiesel, especially suitable for the removal of sulfur compounds in biodiesel

Method used

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  • Novel desulfurization method of biodiesel
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  • Novel desulfurization method of biodiesel

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Embodiment 1

[0020] Example 1 The crude biodiesel raw material used is waste grease gutter oil, its sulfur content is about 50ppm (detected by ultraviolet fluorescence method), and its fatty acid methyl ester content distribution is shown in Table 1, wherein C14-0 is methyl myristate, C16 -0 is methyl palmitate, C18-0 is methyl stearate, C18-1 is methyl oleate, C18-2 is methyl linoleate, C18-3 is methyl linolenate:

[0021] Table 1 Contents of fatty acid methyl esters in waste oil

[0022]

[0023] Such as figure 1 As shown, crude biodiesel produced from gutter oil is pumped into the primary desulfurization tower 1, the heating temperature of the first stage desulfurization tower 1 is controlled at 200°C, the operating absolute pressure is 50Pa, and the reflux ratio is 20. In the primary desulfurization tower 1 Light components are obtained from the top of the tower, and the still liquid of the first desulfurization tower 1 is injected into the second desulfurization tower 2. The heati...

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Abstract

The invention relates to a novel desulfurization method of biodiesel. The method comprises the steps that sulfur-containing compounds in the biodiesel are removed through two stages of high vacuum distillation, crude biodiesel is pumped into a first-stage desulfurization tower for first-stage high vacuum distillation, the tower top of the first-stage desulfurization tower is rich in light components of the sulfur-containing compounds; desulfurized biodiesel at the kettle bottom of the first-stage desulfurization tower is pumped into a second-stage desulfurization tower through a pump for second-stage high vacuum distillation, biodiesel reaching the standard is steamed out from the tower top of the second-stage desulfurization tower, the content of sulfur in the biodiesel reaching the standard is lower than 10 ppm, biological asphalt heavy components are obtained in a tower kettle of the second-stage desulfurization tower, the absolute operation pressure of the desulfurization towers ranges from 10 Pa to 1,000 Pa, and the tower kettle heating temperature ranges from 200 DEG C to 300 DEG C. The method is simple in technological process, low in equipment investment cost and capable of obtaining the biodiesel meeting the standard stably; compared with a traditional petrochemical oil product desulfurization method, a high-temperature catalytic reaction is not related, new substances are not introduced, therefore, the process is safer, the oil product structure is not destroyed, and it is guaranteed that the oil quality is stable.

Description

technical field [0001] The invention belongs to the technical field of biodiesel refining, and in particular relates to a new biodiesel desulfurization method, which is especially suitable for removing sulfur compounds in biodiesel. Background technique [0002] With the increasing shortage of petrochemical resources, the development of renewable bio-energy is a hot topic today, and biodiesel is one of the most typical ones. All countries in the world are developing different raw material resources to produce biodiesel according to their own advantages. my country's catering industry is developed, and there is a large amount of waste oil. At present, waste oil (such as gutter oil) is mainly used to produce biodiesel. Due to its low cost, it has become a promising biodiesel raw material. But one major problem is that it contains certain sulfur compounds (mainly organic matter in sulfur-containing wastewater from restaurants, homes, and other facilities). When biodiesel is b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/04C11C1/02
CPCC10L1/04C10L2200/0476C10L2290/543C11C1/02
Inventor 聂勇计建炳蔡莉吴振宇梁晓江夏凡解庆龙卢美贞
Owner ZHEJIANG UNIV OF TECH
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