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Continuous esterification technique for producing biodiesel from waste grease

A technology for waste oil and biodiesel, applied in fatty acid production, fatty acid esterification, biofuels and other directions, can solve the problems of high methanol and water content, unable to meet the needs of continuous production, unfavorable subsequent reactions, etc., and achieve process energy saving Environmentally friendly, extended dwell time, easy to handle effect

Inactive Publication Date: 2015-06-03
JIANGSU WEST ENVIRONMENT PROTECTION TECH
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  • Abstract
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  • Claims
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Problems solved by technology

The disadvantages of the prior art are: the atmospheric pressure heating separation method cannot meet the continuous production requirements, which is not conducive to the subsequent reaction, and the content of methanol and water in the separated material is above 0.4%, and the content of methanol and water is relatively high

Method used

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  • Continuous esterification technique for producing biodiesel from waste grease

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Embodiment 1

[0023] See figure 1 , the waste oil production biodiesel continuous esterification process of the present embodiment comprises the following steps:

[0024] Step 1: Continuously inject waste oil, catalyst and methanol into continuous esterification reactor 1 through a metering pump to carry out continuous esterification reaction and discharge; the catalyst is an organic acid; the temperature of the continuous esterification reaction is 65°C to 170°C, and the reaction The time is 13 to 20 minutes; the continuous esterification reactor 1 includes a cylinder body, a support and a heating device; the cylinder body is fixed on the support; the bottom and top of the cylinder body are respectively provided with a feed inlet and a discharge port; From bottom to top, the chamber consists of a material mixing section, a material heating reaction section and a material retention reaction section; the heating device is arranged in the material heating reaction section of the barrel. The ...

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Abstract

The invention discloses a continuous esterification technique for producing biodiesel from waste grease, which comprises the following steps: 1. continuously injecting waste grease, a catalyst and methanol into an esterification reactor by a measuring pump to perform continuous esterification reaction, and discharging; 2. sending into a water -containing methanol separator, and separating into excessive methanol, water and a reaction product; sending the excessive methanol and water into a methanol rectification tower; and sending the material into a continuous catalyst separator, and separating into the catalyst and an ester exchange material with ester exchange reaction. The technique has clear process, enables the acid number to be only 2 mgKOH / g or so, is easy for treatment, and implements continuous esterification production of biodiesel from waste grease.

Description

technical field [0001] The invention relates to a continuous esterification process for producing biodiesel from waste oil. Background technique [0002] Biodiesel, also known as biodiesel, is an environmentally friendly biofuel prepared from unprocessed or used vegetable oils and animal fats through different chemical reactions. This biofuel can be used like diesel. The most common method of producing biodiesel is transesterification. Fatty acid esters are formed by reacting triglycerides, which are the main components in vegetable oils and fats, with alcohols (usually methanol) in the presence of catalysts. The physical and chemical properties of fatty acid esters are very similar to or even better than those of diesel, so the market prospect is very good. Because the traditional process uses an acid catalyst for the esterification reaction, the fatty acid reacts with methanol to generate fatty acid methyl ester and water under the condition of an acid catalyst, resulti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/04C11C1/08C11C1/10C10L1/02
CPCC10L1/02C11C1/08C11C1/10C11C3/04Y02E50/10
Inventor 杨锦梁肖达明张伟明张秋华
Owner JIANGSU WEST ENVIRONMENT PROTECTION TECH
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