Method for removing petroleum acid in hydrocarbon oils

A petroleum acid and hydrocarbon oil technology, applied in the petroleum industry, refining hydrocarbon oil, etc., can solve the problems of long time and low efficiency, achieve mild conditions, improve efficiency, and save processing costs

Active Publication Date: 2012-05-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method takes a long time and is inefficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 200 grams of Duba crude oil with an acid value of 4.74 mgKOH / g oil was added to a 500 milliliter three-necked flask with a distillation column, and 12 grams of crude glycerin (glycerin content 80% by weight, a by-product of Shijiazhuang Refining Biodiesel Pilot Plant) was added. Crude glycerol), the molar ratio of glycerin and naphthenic acid is 6: 1, and the outlet temperature of the control distillation column is 120 ℃, and the temperature of the flask is 250 ℃, and reacts for 30min under the action of 900W ultrasonic waves, and the acidity of the duba crude oil after deacidification The value is 0.25mgKOH / g oil, and the acid reduction rate is 94.7%.

Embodiment 2

[0030] With 200 grams of Penglai crude oil with an acid value of 3.28 mgKOH / g oil, add 500 milliliters of three-necked flasks with a distillation column, add 8.1 grams of crude glycerin (80% by weight of glycerol, the same source as in Example 1), aluminum magnesium spinel 0.20 g, the molar ratio of glycerol to naphthenic acid is 6:1, the outlet temperature of the distillation column is controlled at 120° C., the temperature of the flask is 250° C., and the reaction is carried out under 900W ultrasonic wave for 30 minutes. After the reaction, the acid value of Penglai crude oil was 0.37mgKOH / g oil, and the acid reduction rate was 88.7%.

Embodiment 3

[0034] With 200 grams of Penglai crude oil with an acid value of 3.28 mgKOH / g oil, add 500 milliliters of there-necked flasks with a distillation column, add 8.1 grams of crude glycerin (80% by weight of glycerol content, the same source as example 1), 0.5 g of magnesium oxide, The molar ratio of glycerol to naphthenic acid was 6:1, the outlet temperature of the distillation column was controlled at 120°C, the temperature of the flask was 250°C, and the reaction was carried out under 700W ultrasonic wave for 90min. The acid value of the reacted Penglai crude oil is 0.45 mgKOH / g oil, and the acid reduction rate is 86.3%.

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Abstract

The invention relates to a method for removing the petroleum acid in the hydrocarbon oil, which comprise the step that alcohol contacts with the petroleum acid in the hydrocarbon oil for esterification reaction. The method is characterized in that the reaction is performed under the ultrasonication, and the ratio of the power of the supersonic wave to the weight of the hydrocarbon oil is 0.05 to 20 W / g. The method has the advantages of high acid stripping efficiency and short reaction time.

Description

technical field [0001] The invention relates to a method for removing petroleum acid in hydrocarbon oil. Background technique [0002] The acidic substances in petroleum are collectively referred to as petroleum acid, mainly naphthenic acid, and the acid value is usually used to indicate the content of naphthenic acid in oil. When the acid value of crude oil is greater than 0.5 mg KOH / g oil, the equipment will be corroded during the refining process, the quality of petroleum products will be reduced, and the environment will be polluted. Therefore, it is necessary to remove the petroleum acid in the high-acid crude oil before processing it. As the poor quality of crude oil continues to increase, the output of high-acid crude oil is increasing year by year. Methods for removing petroleum acid include solvent extraction, adsorption, alkali neutralization, esterification, hydrogenation and heat treatment. The alkali neutralization method is relatively simple, but the sodium ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G29/22
Inventor 张伟谢丽李子锋慕旭宏杜泽学宗保宁闵恩泽
Owner CHINA PETROLEUM & CHEM CORP
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