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High-acid-value fuel composite catalytic esterification/deacidification method

A composite catalytic ester and composite catalyst technology, applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of harsh process and high esterification temperature, achieve the effects of less dosage, fast esterification reaction and lower production cost

Inactive Publication Date: 2014-10-08
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007]Technical problems to be solved: In view of the defects existing in the existing deacidification methods, and the common problems of high esterification temperature and harsh process in the existing esterification deacidification technology Problem, the purpose of the present invention is to provide a method for compound catalytic esterification and deacidification of high-acid fuel oil. The composite catalyst used in the present invention is simple to prepare, low in production cost, high in catalytic activity and moderate in acidity, and not only catalyzes rapid esterification and effectively avoids series of defects such as polymerization reaction and equipment corrosion caused by traditional strong acid catalysts in the esterification process; the compound catalytic esterification deacidification process of the present invention is simple, the reaction temperature is low, the esterification reaction is fast, and can effectively remove high Acidic substances in acid-valued fuel oil, and will not reduce the quality index of fuel oil after deacidification, which is conducive to industrialized large-scale batch production

Method used

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Embodiment 1

[0026] The composite catalyst is composed of B acid: sulfamic acid and L acid: aluminum chloride, and its weight ratio is 6:4, and the two are compounded. The specific process of applying the composite catalyst with this ratio to the composite catalytic esterification and deacidification of high acid value fuel oil is as follows: take 120 g of fuel oil (acid value: 15.7 mgKOH) into the esterification reactor, and add 85 g of n-butanol to it , adding the composite catalyst, the amount of composite catalyst added is 0.5% by weight of fuel oil, the reaction temperature is controlled at 150 °C, the reaction is stirred for 2 h, the acid value is measured by sampling, and the deacidification rate of fuel oil is calculated to be 85.3%.

[0027]

Embodiment 2

[0029] The composite catalyst is composed of B acid: p-toluenesulfonic acid and L acid: ferric chloride, and the weight ratio is 8:2, and the two are compounded. The specific process of applying the composite catalyst with this ratio to the composite catalytic esterification and deacidification of high acid value fuel oil is as follows: Take 180 g of fuel oil (acid value: 13.9 mgKOH) into the esterification reactor, add 65 g of glycerin to it, add Composite catalyst, the amount of composite catalyst added is 0.8% of the weight of fuel oil, the reaction temperature is controlled at 150°C, the reaction is stirred for 4 hours, the acid value is measured by sampling, and the deacidification rate of fuel oil is calculated to be 87.7%.

[0030]

Embodiment 3

[0032] The composite catalyst is composed of B acid: sulfuric acid and L acid: titanium tetrachloride, the weight ratio is 5:5, and the two are compounded. The specific process of applying the composite catalyst with this ratio to the compound catalytic esterification deacidification of high acid value fuel oil is as follows: take 240 g fuel oil (acid value: 18.3 mgKOH) into the esterification reactor, add 96 g 1, 3-Butanediol was added to the composite catalyst. The amount of the composite catalyst added was 1.0% of the mass of the fuel oil. The reaction temperature was controlled at 150°C, and the reaction was stirred for 3 hours. The acid value was measured by sampling, and the deacidification rate of the fuel oil was calculated to be 94.7%.

[0033]

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Abstract

The invention relates to a high-acid-value fuel composite catalytic esterification / deacidification method which comprises the following steps: adding a composite catalyst into high-acid-value fuel, wherein the addition amount of the composite catalyst is 0.2-1.0 wt% of the fuel, and the composite catalyst is compounded from B acid and L acid in a weight ratio of 7:3-2:8; adding C1-C4 fatty alcohols into the mixture, wherein the fatty alcohols account for 30.0-120.0 wt% of the fuel; and adding the mixture into an esterification reaction kettle, and stirring to react at 80-160 DEG C for 1-4 hours. The composite catalyst has the advantages of simple preparation process, low production cost, high catalytic activity and moderate acidity, catalyzes the esterification reaction, and effectively avoids the defect that the traditional strong-acid catalyst can easily initiate polymerization reaction, corrode the equipment and the like in the esterification process.

Description

[0001] technical field [0002] The invention belongs to the technical field of fuel oil refining, and in particular relates to a method for compound catalytic esterification and deacidification of high acid value fuel oil. [0003] Background technique [0004] Petroleum is an important energy source. It is mainly fuel oil and gasoline. There are certain acidic substances such as naphthenic acid in petroleum crude oil and distillate oil; and it is easily oxidized during processing, forming a large amount of fuel oil with high acid value. Generally 5.0~20 mgKOH / g. Due to the high acid value, it is easy to cause equipment corrosion during use, and reduce the quality of fuel oil and reduce various indicators such as combustion performance. In view of the problems caused by the use of fuel oil with high acid value, countries all over the world are actively studying the processing methods of removing acid value from high acid value fuel oil, including alkali neutralization, so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G29/00
Inventor 蒋剑春刘朋徐俊明陈水根李静夏海虹
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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