Method for decreasing petroleum acid value

A technology of petroleum acid and petroleum, applied in the field of deacidification, which can solve the problems of affecting the properties of petroleum and high cost, and achieve the effect of avoiding the influence of petroleum properties, easy implementation and high deacidification efficiency

Active Publication Date: 2009-08-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the disadvantages that the method for reducing the acid value of petroleum in the prior art will affect the properties of petroleum or have high costs, and provide a method for reducing the acid value of petroleum that does not affect the properties of petroleum, has low cost, high efficiency, and is easy to implement

Method used

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  • Method for decreasing petroleum acid value

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Effect test

Embodiment 1

[0034] This embodiment is used to illustrate the method for reducing the acid value of petroleum provided by the present invention.

[0035] Such as figure 1 As shown, the desalted and dehydrated crude oil with an acid value of 18.21 mg KOH / g enters the preheater 2 from pipeline 1 and preheats to 440 ° C for thermal deacidification reaction. The time of thermal deacidification reaction is 30 seconds, and the obtained heat The deacidification reaction product is cooled to 250°C in pipeline 3 by heat exchange with diesel oil at 50°C, and then sent into esterification reactor 4 together with 0.5% by weight of glycerol and 0.8% by weight of pentaerythritol relative to the weight of desalted and dehydrated crude oil Carry out esterification and deacidification reaction, the reaction time is 200 minutes, the obtained esterification and deacidification product enters fractionation tower 6 from pipeline 5 and carries out fractional distillation, and the deacidification crude oil produ...

Embodiment 2

[0037] This embodiment is used to illustrate the method for reducing the acid value of petroleum provided by the present invention.

[0038] Such as figure 1 As shown, the desalted and dehydrated crude oil with an acid value of 10.36 mg KOH / g enters the preheater 2 from pipeline 1 and preheats to 420 ° C for thermal deacidification reaction. The time of thermal deacidification reaction is 50 seconds, and the obtained heat The deacidification reaction product is cooled to 300°C in the pipeline 3 through heat exchange with 30°C diesel oil, and then sent to the esterification reactor 4 together with 0.5% by weight of diethylene glycol relative to the weight of the desalted and dehydrated crude oil for deesterification Acid reaction, the reaction time is 30 minutes, the obtained esterification and deacidification product enters the fractionation tower 6 from pipeline 5 for fractionation, and obtains deacidification crude oil product, small molecular gas and coke with an acid value...

Embodiment 3

[0040] This embodiment is used to illustrate the method for reducing the acid value of petroleum provided by the present invention.

[0041] Such as figure 1 As shown, the desalted and dehydrated crude oil with an acid value of 13.10 mg KOH / g enters the preheater 2 from pipeline 1 and preheats to 405 ° C for thermal deacidification reaction. The time of thermal deacidification reaction is 50 seconds, and the obtained heat The deacidification reaction product is cooled to 200°C in pipeline 3 through heat exchange with 30°C atmospheric residue, and then sent to esterification reactor 4 together with 1.0% by weight of triethylene glycol relative to the weight of desalted and dehydrated crude oil. Esterification and deacidification reaction, the reaction time is 280 minutes, the obtained esterification and deacidification product enters the fractionation tower 6 from the pipeline 5 for fractionation, and obtains the deacidified crude oil product and small molecule gas with an acid...

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Abstract

A method for reducing the acid value of petroleum, which comprises heating the acid-containing petroleum at 405-500° C. for 5 seconds to less than 1 minute, and then contacting the obtained reaction product with a deacidifying agent to obtain deacidified petroleum. The method provided by the invention supplements thermal cracking deacidification with esterification reaction, which can shorten the heat treatment time and reduce the impact on petroleum properties; the deacidification agent consumes less and the deacidification rate is as high as 99%; the process is simple and easy to implement.

Description

technical field [0001] The invention relates to a method for deacidification, in particular to a method for reducing the acid value of petroleum. Background technique [0002] The acidic substances in petroleum are mainly naphthenic acid, and also include some other organic acids. In the process of petroleum processing, naphthenic acid can react directly with iron, causing corrosion of furnace tubes, heat exchangers and other refining equipment; naphthenic acid can also react with FeS, the protective film of petroleum equipment, to expose new metal equipment The surface is subject to new corrosion, especially in a high temperature environment exceeding 200 ° C, the corrosion of naphthenic acid to metal equipment increases sharply. If the acidic substances in the oil cannot be removed during the refining process, it will affect the quality of the final product, cause equipment failure, environmental pollution and other problems. Studies have shown that when the acid value i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G31/06C10G29/22
Inventor 李本高王振宇罗咏涛
Owner CHINA PETROLEUM & CHEM CORP
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