Esterification method for preparing biodiesel using waste oils and fats

A technology of waste oil and biodiesel, which is applied in fatty acid esterification, biofuel, petroleum industry, etc., to achieve the effects of shortened reaction time, low corrosion, and wide range of acid values ​​of raw materials

Active Publication Date: 2013-12-18
四川惠盛新能源有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the shortcomin

Method used

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  • Esterification method for preparing biodiesel using waste oils and fats

Examples

Experimental program
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Example Embodiment

[0017] Example 1

[0018] Such as figure 1 As shown, 14 tons of waste oil with an acid value of 120mgKOH / g after removing impurities and water is added to the raw oil storage tank 8, and the waste oil is pumped through the raw oil heat exchanger 7 into the raw oil heater 6 for heating by an oil pump. The waste oil heated to 100°C is added to the stainless steel reactor 5 from the raw oil inlet on the top of the stainless steel reactor 5, and 52kg of esterification catalyst is added to the stainless steel reactor 5 from the catalyst inlet on the top of the stainless steel reactor 5. The esterification catalyst is a mixture of methyl sulfonic acid and phosphoric acid with a mass ratio of 1:0.1. The refined methanol enters the methanol heater 3 through the methanol heat exchanger 1 for heating and gasification. The gasification methanol is 0.7m 3 / h flow rate flows from the gas-phase methanol tube 9 in the bottom of the stainless steel reactor 5 into the stainless steel reactor 5. T...

Example Embodiment

[0021] Example 2

[0022] Such as figure 1 As shown, 14 tons of waste oil with an acid value of 120mgKOH / g after removing impurities and water is added to the raw oil storage tank 8, and the waste oil is pumped through the raw oil heat exchanger 7 into the raw oil heater 6 for heating by an oil pump. The waste oil heated to 110°C is fed into the stainless steel reactor 5 from the raw oil inlet on the top of the stainless steel reactor 5, and 52kg of esterification catalyst is fed into the stainless steel reactor 5 from the catalyst inlet on the top of the stainless steel reactor 5. The esterification catalyst is a mixture of methyl sulfonic acid and phosphoric acid with a mass ratio of 1:0.05. The refined methanol enters the methanol heater 3 through the methanol heat exchanger 1 for heating and gasification. The gasification methanol is 0.8m 3 / h flow rate flows from the gas-phase methanol tube 9 in the bottom of the stainless steel reactor 5 into the stainless steel reactor 5. ...

Example Embodiment

[0023] Example 3

[0024] In Example 1, the esterification catalyst used was a mixture of equal mass of ethyl sulfonic acid and polyether acid phosphate in a mass ratio of 1:0.01. The other steps were the same as in Example 1, and the acid value was less than 1 mgKOH / g. The yield of the methyl ester is 95%.

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Abstract

Provided is an esterification method for preparing biodiesel using waste oils and fats. Under the normal pressure condition, the mixture of methanesulfonic acid, ethanesulfonic acid or chlorosulfonic acid and erosion restraint agents is used as a catalyst, the using amount of the catalyst is little, the catalyst can be repeatedly used, erosion on equipment is small, through a demister arranged on the top of a reaction kettle, the utilization rate of raw oil and the yield coefficient of coarse methyl ester are improved, heat generated in the reaction process is used for preheating fine methyl alcohol and waste oils and fats, heat is circularly used, energy loss is reduced, methyl alcohol which is not reacted is recovered, and production cost is lowered. The acid value of raw materials of the esterification method is wide (15-180mgKOH/g), the reaction time is short, energy loss is little, production cost is low, the yield coefficient of coarse methyl ester is high, high-acid-value flora and fauna waste oils and fats are esterified in one time to be lower than 1mgKOH/g in acid value, the next transesterification can be directly carried out to prepare biodiesel, and the method is suitable for producing biodiesel in an industrial mode.

Description

technical field [0001] The invention belongs to the technical field of biodiesel preparation, and in particular relates to an esterification reaction for preparing biodiesel from waste oil. Background technique [0002] Biodiesel refers to a clean alternative fuel that can be used in compression ignition engines produced from renewable biological resources such as plants and animal fats. In terms of chemical composition, biodiesel is a series of long-chain fatty acid methyl or ethyl esters. It is a high-quality substitute for petrochemical diesel and is known as "green diesel". In recent years, due to the rise of oil prices, the non-renewability of petrochemical energy and a series of environmental problems, biodiesel has become one of the main alternative energy sources for research. [0003] The preparation of biodiesel is mainly produced by chemical methods, that is, the reaction of animal and vegetable oils with methanol, the esterification reaction occurs under the act...

Claims

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Application Information

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IPC IPC(8): C11C3/10C10L1/02
CPCY02E50/10
Inventor 申烨华许龙李聪陈邦何能德
Owner 四川惠盛新能源有限公司
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