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Method for producing biodiesel by combining biological enzyme esterification and supercritical technology

A supercritical technology and biodiesel technology, which is applied in the field of biodiesel production by combining biological enzyme esterification and supercritical technology to achieve the effects of high efficiency and fast reaction process, energy saving and environmental protection in the production process, good economic benefits and social benefits

Pending Publication Date: 2022-03-29
唐河金海生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method of combining bio-enzyme esterification and supercritical technology to produce biodiesel, to overcome the respective defects of the two production methods, and to solve the problem of using waste oil with high acid value as raw material oil production at present. Technical Difficulties of Biodiesel

Method used

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Embodiment 1

[0039] Embodiment 1 The method of combining biological enzyme esterification and supercritical technology to produce biodiesel according to the present invention comprises the following steps:

[0040]The first step, the reaction raw material preparation:

[0041] Add 1000kg of raw material oil into the reaction kettle with stirring function (before the raw material oil enters the reaction kettle through the delivery pump, the temperature can be adjusted to 40~45°C through the heat exchanger), and about 4kg of NaOH solution (concentration 10°C) is added through the metering pump %), adjust the pH value of the raw material oil to 5~7, and then add 2kg of lipase (with an activity of 100,000 units) through a metering pump; mix the raw material oil, NaOH solution and biological enzyme in the reaction kettle, and the mixing time is 3 ~5 minutes;

[0042] The second step, esterification reaction

[0043] After the first step is completed, keep the temperature at 40~45°C, add 130kg...

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Abstract

The invention discloses a method for producing biodiesel by combining bio-enzyme esterification and a supercritical technology, which combines the bio-enzyme technology and the supercritical technology, and comprises the following steps: firstly, fully hydrolyzing raw oil by using bio-enzyme; then, fatty acid and methanol are efficiently and thoroughly subjected to methyl esterification under the condition of extremely low moisture in a supercritical state. Tests prove that the content of fatty ester can be reduced to be lower than 5% by utilizing biological enzyme catalysis for methyl esterification, then through supercritical reaction, all methyl esterification of free fatty acid can be completed only in 30-60 minutes, the content of fatty acid is reduced to be lower than 0.8%, and finally through distillation and rectification, the quality standard acid value of biodiesel is smaller than 0.5 mgKOH / g. The whole reaction process is efficient and rapid, the methyl ester conversion rate is high, the product yield is high, the technological process is simple, the production process is energy-saving and environment-friendly, no sewage is generated, and good economic benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to the production of biodiesel, in particular to a method for producing biodiesel by combining biological enzyme esterification and supercritical technology. Background technique [0002] The chemical composition of biodiesel is fatty acid methyl ester or fatty acid ethyl ester. It is a kind of green and environmentally friendly renewable energy. It can be used in combination with petrochemical diesel to reduce the amount of petrochemical energy used, thereby achieving the effect of energy saving and emission reduction. [0003] The source of biodiesel is the reaction of vegetable oil with methanol or ethanol under the action of a catalyst to form fatty acid methyl or ethyl ester. Vegetable oils commonly used abroad are high-quality soybean oil, rapeseed oil, and palm oil. Because of their low impurities in raw oil and low free fatty acid content (generally less than 1%), the production process is relatively simple. Basic catalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/04C11B3/00C11B3/12C12P7/649C10L1/02
CPCC11C3/04C11B3/001C11B3/12C12P7/649C10L1/02Y02E50/10Y02P20/54
Inventor 杨书平路炬晶杨书信杨蔓菁王明
Owner 唐河金海生物科技有限公司
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