Composite demulsifying agent

A composite demulsifier and composite demulsification technology, applied in the field of composite demulsifiers, to achieve the effects of low oil content in the water phase, high dehydration rate, and fast dehydration speed

Active Publication Date: 2013-10-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, the existing demulsifiers still cannot solve the problems of high-acid crude oil in the process of electrical desalting, so it is urgent to develop new demulsifiers for high-acid crude oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Preparation of demulsifier:

[0016] The corresponding demulsifier can be prepared by mixing the components in the table in proportion until uniform. Among them, the commercially available demulsifier AE31 is a di-block polyoxyethylene polyoxypropylene polyether, and the demulsifier AP136 is a tri-block polyoxyethylene polyoxypropylene polyether.

[0017] Table 1 Composition of Demulsifier 1

[0018]

[0019] Table 2 Composition of demulsifier 2

[0020]

[0021] Table 3 Composition of demulsifier 3

[0022]

Embodiment 2

[0024] Demulsifier evaluation test:

[0025] Demulsification tests were carried out using demulsifiers 1, 2 and 3. The oil used in the test is Quidou high-acid crude oil (with a density of 0.9220g / cm 3 , acid value is 2.19mgKOH / g), first preheating the raw material oil to 80°C, adding water (water injection is 10% by mass), demulsifier, fully mixed, placed in a constant temperature water bath at 80°C, and regularly observing the water content. The test results are shown in Table 4.

[0026] Table 4

[0027]

Embodiment 3

[0029] Preparation of demulsifier:

[0030] Prepared according to the method of Example 1.

[0031] The composition of table 5 demulsifier 4

[0032]

[0033] The composition of table 6 demulsifier 5

[0034]

[0035] The composition of table 7 demulsifier 6

[0036]

[0037] The composition of table 8 demulsifier 7

[0038]

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Abstract

The invention relates to a composite demulsifying agent. The composite demulsifying agent is a solution which comprises 5-60 parts of polyoxyethylene polypropylene oxide block polyether, 2-10 parts of primary amide, 1-20 parts of C2-C6 carboxylic acids and 20-90 parts of water in parts by mass. When being used for demulsifying high acid crude oil, the composite demulsifying agent has the characteristics of fast dehydration speed, high dehydration rate, low content of water phase and oil and the like.

Description

technical field [0001] The invention relates to a composite demulsifier, in particular to a composite demulsifier suitable for high-acid crude oil. Background technique [0002] With the continuous rise of international crude oil prices, the proportion of crude oil cost in the total processing cost of oil refineries is also increasing. The processing technology of low-quality and cheap crude oil has become the key to improve the competitiveness of oil refineries. The acid value of high-acid crude oil is greater than 1.0mg KOH / g, which is a kind of low-quality and cheap crude oil with abundant reserves. [0003] There are problems such as low demulsification efficiency, high oil content in the water phase, and easy corrosion when the high-acid crude oil is subjected to electrical desalination. Due to the low efficiency of demulsification, the water and salt content of high-acid crude oil often exceed the standard after the electric desalting process. The prior art mainly ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
Inventor 李本高王暠谭丽
Owner CHINA PETROLEUM & CHEM CORP
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