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Production method of biodiesel

A biodiesel and production method technology, applied in biofuel, fatty acid production, petroleum industry, etc., can solve problems such as poor separation effect of acid residue, low energy utilization rate, and reduced acid value, so as to improve the efficiency of esterification reaction, The effect of saving methanol consumption and reducing alcohol consumption

Active Publication Date: 2014-08-27
四川惠盛新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The following problems are often encountered in production, the acid value of esterification cannot be reduced in a short time, the separation effect of acid slag is not good, too much soap is formed during transesterification, and the alcohol consumption is far greater than the actual required amount (generally more than 25%, And the theoretical minimum alcohol consumption is only about 15%), energy utilization rate is low, and productive rate is generally lower than 80%

Method used

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  • Production method of biodiesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Pretreatment of raw oil

[0034] Such as figure 1 As shown, the acid value of 14 tons is 120mgKOH / g, the impurity content is 1%, the water content is 5%, the saponification value is 190mgKOH / g, and the density is 0.91kg / m 3 Put the waste oil into the raw oil pretreatment kettle 13, add 1.4 tons of water, turn on the stirring device of the raw oil pretreatment kettle 13, and feed steam to the raw oil pretreatment kettle 13 at the same time, heat the waste oil to 60°C, and continue steaming Keep constant temperature, after stirring for 40 minutes, add 42kg methanesulfonic acid, continue to stir at constant temperature for 60 minutes, then add 4.2kg of polyacrylamide with a molecular weight of 12 million, stir at constant temperature for 60 minutes, open the valve at the bottom of raw material oil pretreatment kettle 13, The waste oil is pumped into No. 1 butterfly centrifuge 12 with an oil pump for centrifugal separation, and the waste oil that removes mechanical impu...

Embodiment 2

[0052] In the pretreatment step 1 of the feedstock oil in Example 1, 14 tons of oil had an acid value of 120 mgKOH / g, an impurity content of 1%, a moisture content of 5%, a saponification value of 190 mgKOH / g, and a density of 0.91 kg / m 3Put the waste oil into the raw oil pretreatment kettle 13, add 2.1 tons of water, turn on the stirring device of the raw oil pretreatment kettle 13, and supply steam to the raw oil pretreatment kettle 13 at the same time, heat the waste oil to 80 ° C, and continue to pass steam Keep constant temperature, after stirring for 20 minutes, add 14kg methanesulfonic acid, continue to stir at constant temperature for 30 minutes, then add 7kg of polyacrylamide with a molecular weight of 10 million, and stir at constant temperature for 30 minutes, open the valve at the bottom of raw material oil pretreatment kettle 13, and use The waste oil is pumped into No. 1 butterfly centrifuge 12 by the oil pump for centrifugation, and the waste oil that removes col...

Embodiment 3

[0054] In the pretreatment step 1 of the feedstock oil in Example 1, 14 tons of oil had an acid value of 120 mgKOH / g, an impurity content of 1%, a moisture content of 5%, a saponification value of 190 mgKOH / g, and a density of 0.91 kg / m 3 Put the waste oil into the raw oil pretreatment kettle 13, add 2.1 tons of water, turn on the stirring device of the raw oil pretreatment kettle 13, and supply steam to the raw oil pretreatment kettle 13 at the same time, heat the waste oil to 80 ° C, and continue to pass steam Keep constant temperature, after stirring for 20 minutes, add 70kg methanesulfonic acid, continue to stir at constant temperature for 30 minutes, then add 1.4kg of polyacrylamide with a molecular weight of 18 million, stir at constant temperature for another 30 minutes, open the valve at the bottom of raw material oil pretreatment kettle 13, The waste oil is pumped into No. 1 butterfly centrifuge 12 with an oil pump for centrifugal separation, and the waste oil that rem...

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Abstract

The invention provides a production method of biodiesel. The production method comprises the steps of preprocessing of raw oil, esterification reaction, transesterification, dealcoholization, washing, distillation and deodorization, methanol distillation and recycling, glycerin purification and recycling and other steps. The production method has the advantages that the utilization rate of raw oil is high; few esterifying catalysts are needed; the catalytic activity is high; the esterification reaction is performed within a short time; a water-bath heating system is adopted, so that the temperature of heating a medium can be controlled effectively, and the generated unsaponifiable matters can be effectively decreased; in addition, the heat produced in reaction can be recycled, thus the energy consumption is reduced; the unreacted methanol can be recycled that the production cost is reduced. The biodiesel has acid value up to 0.5mgKOH / g and yield up to more than 92%, has the quality meeting BD100, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of biodiesel preparation, and in particular relates to a method for producing biodiesel by an acid-base catalysis method. Background technique [0002] In the current situation of increasingly severe world energy crisis, bioenergy, as a relatively mature and scalable new energy source, has been paid more and more attention by people. Although there are many existing bioenergy processes, most of them have quite strict requirements on raw materials, so that it is impossible to expand production on a large scale. The acid-base two-step catalytic method, because its raw materials are mainly animal and vegetable oils, has a wide source and low raw material requirements, especially kitchen waste oil can be used as raw materials, which is conducive to the reuse of waste oil and the reduction of its reflux At the same time, it will not compete with the people for oil, so most of the biodiesel companies in China now...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11C3/00C11C3/04C11C3/10C11C1/08C10L1/02
CPCY02E50/13Y02E50/10
Inventor 申烨华陈邦李聪许龙何能德
Owner 四川惠盛新能源有限公司
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