Method for recovering naphthenic acid from hydrocarbon oil and device thereof

A naphthenic acid and hydrocarbon oil technology, applied in the separation/purification of carboxylic acid compounds, only multi-stage series refining process treatment, organic chemistry, etc., can solve the problems of difficult stratification, high cost, serious emulsification, etc., and achieve Good economic and environmental benefits, reduced process costs, and reduced losses

Inactive Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method and device for recovering naphthenic acid from hydrocarbon oil, so as to solve the technical problems of serious emulsification, difficult separation and high cost in the prior art

Method used

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  • Method for recovering naphthenic acid from hydrocarbon oil and device thereof
  • Method for recovering naphthenic acid from hydrocarbon oil and device thereof
  • Method for recovering naphthenic acid from hydrocarbon oil and device thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The raw material oil 3 with a boiling point greater than 150°C from the raw material buffer tank 2 and the deacidification solvent 4 from the deacidification solvent tank 1 successively enter the first static mixer 5 and the second static mixer 6 for mixed reaction; the oil after the mixed reaction The agent mixture 7 enters the settling separation tower 8, and the oil agent mixture 7 settles and separates into two phases in the settling separation tower 8. The upper layer is the deacidification solvent 9 containing naphthenic acid, and the lower layer is the agent-containing raw material oil 15 after deacidification; After the deacidification of the separation tower 8, the agent-containing raw material oil 15 enters the raw material distillation tower 16, and a small amount of recovered deacidification solvent 10 carried by the raw material oil 3 is evaporated from the top of the tower and returned to the deacidification solvent tank 1 for recycling, and discharged from ...

Embodiment 2

[0037] Technological process is with example 1.

[0038] Process conditions are as follows in the present embodiment:

[0039] Raw material oil: Beijiang crude oil, total acid value 3.66mgKOH / g

[0040] The composition of deacidification solvent: ethanol 78% (weight), water 20.2% (weight), ammonia 1.8% (weight)

[0041] Process conditions: reaction temperature 75°C, reaction time 5min, settling temperature 75°C, settling time 30min, deacidification solvent / crude oil mass ratio 1.

[0042] The acid value of Beijiang crude oil after deacidification is 0.54mgKOH / g, and the deacidification rate is 85.2%.

Embodiment 3

[0044] Technological process is with example 1.

[0045] Process conditions are as follows in the present embodiment:

[0046] Raw material oil: Penglai crude oil, total acid value 3.20mgKOH / g

[0047] The composition of deacidification solvent: ethanol 68% (weight), water 30.5% (weight), ammonia 1.5% (weight)

[0048] Process conditions: reaction temperature 80°C, reaction time 10min, settling temperature 80°C, settling time 45min, deacidification solvent / crude oil mass ratio 1.

[0049] The acid value of Penglai crude oil after de-acidification is 0.46mgKOH / g, and the de-acidification rate is 85.6%. The refined naphthenic acid by-product obtained by the measurement conforms to the SH0092 No. 3 acid standard.

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Abstract

The invention provides a method for recovering naphthenic acid from hydrocarbon oil and a device thereof. The method comprises: reacting a raw material oil and deacidified solvent in a static mixer, and delivering the oil and agent mixture obtained after reaction into a settling separation tower, wherein the mixture is divided into two layers in the tower, the upper naphthenic-acid-containing deacidified solvent is distilled in a decomposing distillation tower for distillation, the deacidified solvent evaporated out is returned to a deacidified solvent tank to be circularly used, and coarse naphthenic acid discharged from the bottom of the decomposing distillation tower is delivered into a naphthenic acid refining tank for refining treatment and thus refined naphthenic acid is obtained; and the lower deacidified raw material oil in the settling separator tower is delivered to a raw material distillation tower, a small amount of deacidified solvent is evaporated out from the top of the tower and is returned to a deacidified solvent tank to be used circularly, and the deacidified raw material oil is discharged out from a raw material distillation tower. When the method and the device are used, the acidity and corrosion of the oil can be reduced, the naphthenic acid byproduct with high added value can be obtained, the deacidified solvent is cheap and readily available and can be circularly used for a plurality of times, and waste gas, waste water and waste residue are not discharged.

Description

technical field [0001] This invention relates to a method and device for recovering petroleum acid from hydrocarbon oil, specifically to a method and device for recovering naphthenic acid from hydrocarbon oil. Background technique [0002] In recent years, the proportion of high acid value crude oil in total crude oil production is increasing. Petroleum acid in high acid value crude oil includes naphthenic acid, fatty acid and phenolic substances, among which naphthenic acid accounts for more than 95%. Naphthenic acid will cause serious corrosion to refining equipment during crude oil processing and affect the long-term performance of refining equipment. Periodic safe operation and affect the performance of petroleum products. In addition, naphthenic acid is an important fine chemical raw material, which is widely used in the fields of paint drier, plant growth agent, preservative, catalyst, emulsifier and petroleum additive. Therefore, the separation and recovery of napht...

Claims

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Application Information

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IPC IPC(8): C10G53/04C07C61/00C07C51/42
Inventor 申明周段永锋彭松梓李春贤崔新安
Owner CHINA PETROLEUM & CHEM CORP
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