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Emulsion breaker for alkali residue of emulsified diesel and use method thereof

A technology for emulsification of diesel oil and demulsifier, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of increased production cost, high price of organic demulsifier, and insignificant demulsification effect of organic demulsifier, and achieves pollution reduction. Effect

Inactive Publication Date: 2006-02-15
中国石油天然气股份有限公司乌鲁木齐石化分公司
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AI Technical Summary

Problems solved by technology

[0003] In the previous demulsification of emulsified diesel oil alkali slag, organic demulsifiers were often used for demulsification. Due to the frequent changes in the properties of alkali slag, the demulsification effect of organic demulsifiers is not obvious, and the price of organic demulsifiers is high, which makes the production cost Increase

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Add sulfuric acid to neutralize gasoline alkali slag to obtain waste brine, the pH value of which is 7. Take 1 ton of waste brine, add it to 2 tons of emulsified diesel oil alkali residue, stir and mix well at 30°C, and let it stand for 8 hours. The oil and water layers are clear, and the waste alkali water and diesel oil are separated. Sulfuric acid is added to waste alkaline water to neutralize to a pH value of 5 to obtain naphthenic acid.

Embodiment 2

[0012] Example 2: Add sulfuric acid to neutralize gasoline soda slag to obtain waste brine, the pH value of which is 5. Take 1 ton of waste brine and 1 gram of polyacrylamide, mix them evenly, add them to 5 tons of emulsified diesel oil alkali slag, stir and mix them well at 50°C, and let them stand for 3 hours, the oil-water layer is clear, and the spent alkali is separated water and diesel. Sulfuric acid is added to waste alkaline water to neutralize to a pH of 6 to obtain naphthenic acid.

Embodiment 3

[0013] Example 3: Add sulfuric acid to neutralize gasoline soda slag to obtain waste brine with a pH value of 4. Take 1 ton of waste brine and 2 grams of polyacrylamide, mix them evenly, add them to 10 tons of emulsified diesel soda slag, fully stir and mix them at 80°C, and let them stand for 2 hours. water and diesel. Sulfuric acid is added to waste alkaline water to neutralize to a pH value of 3 to obtain naphthenic acid.

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PUM

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Abstract

The demulsifier applicable to emulsification of diesel oil alkaline residue is characterized by that in the gasoline alkaline residue the sulfuric acid is added to make neutralization reaction to obtain waste salt water, and its pH value is controlled at 4-7. Its use method includes the following steps: in emulfified diesel oil alkaline residue adding 10-50 wt% of demulsifier, fully mixing them at 30-80 deg.C, standing still for 1-10 hr emulsion-breaking and demixing, oil and water clear separation and separating waste alkaline water and diesel oil. Said invention uses gasoline alkaline residue as raw material to make acid-alkali neutralization to obtain demulsifier, and uses said demulsifier to make demulsification of emulsified diesel oil alkaline residue so as to can obtain good demulsification effect.

Description

1. Technical field: [0001] The invention relates to a demulsifier for emulsified diesel alkali slag and a using method thereof. 2. Background technology: [0002] With the increase in the variety of crude oil refined by refineries in recent years, the properties of crude oil have changed greatly. In particular, the content of naphthenic acid in crude oil increases, and the normal-pressure second-line diesel alkali refining process, due to the emulsification of sodium naphthenate, causes serious emulsification of oil and water, difficult dehydration, and difficulty in leaving the factory. Simultaneously, the consumption of alkali is increased, and the diesel alkali slag discharged outside is milky and contains a large amount of oil, which not only affects the yield and pass rate of light oil, but also causes environmental pollution. When dealing with this part of the emulsified diesel alkali residue, if a suitable demulsifier is used to break the emulsion, then light oil is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/32
Inventor 徐新良展江宏孟伟史万年王凯歌董志新王安江
Owner 中国石油天然气股份有限公司乌鲁木齐石化分公司
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