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Compound demulsifier for heavy inferior crude oil

A technology of low-quality crude oil and demulsifier, which is applied in the direction of dehydration/demulsification by chemical methods, and can solve the problems of large usage, long dehydration time, and ineffective demulsification and dehydration effects

Inactive Publication Date: 2016-08-24
长江(扬中)电脱盐设备有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is to develop a composite demulsifier for heavy and inferior crude oil to solve the problems that existing demulsifiers for heavy and inferior crude oil have no obvious demulsification and dehydration effect, long dehydration time and large usage

Method used

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  • Compound demulsifier for heavy inferior crude oil
  • Compound demulsifier for heavy inferior crude oil
  • Compound demulsifier for heavy inferior crude oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0022] Demulsifier thermochemical sedimentation evaluation test:

[0023] Test procedure: 90g of Liaohe heavy oil + 10g of distilled water, preheated in a constant temperature water bath at 80°C for 5 minutes, mixed manually 60 times, and settled in a constant temperature water bath for comparison. The data of sedimentation demulsification and dehydration efficiency are as follows:

[0024]

[0025] Embodiment A composite demulsifier composition:

[0026] Demulsifier AP221, 15% Demulsifier AR36, 25%

[0027] New silicone polymer demulsifier (grade: 1636), 5%

[0028] Dodecylbenzenesulfonic acid, 0.5%

[0029] Mixed xylene solvent, 30% hydrocarbon solvent oil 200#, 24.5%

Embodiment B

[0031] Demulsifier thermochemical sedimentation evaluation test:

[0032] Test procedure: Mix heavy oil (sand weight: Iraqi weight = 1:9) 80 + distilled water 20g, preheat in a constant temperature water bath at 85°C for 5 minutes, mix manually 60 times, and stand still in a constant temperature water bath for sedimentation comparison. The data of sedimentation demulsification and dehydration efficiency are as follows:

[0033]

[0034]

[0035] Embodiment B demulsifier composition:

[0036] Demulsifier BP2070, 10% Demulsifier AR46, 35%

[0037] New silicone polymer demulsifier (grade: 606), 5%

[0038] Dodecylbenzenesulfonic acid, 0.5% Isopropanol, 4.5%

[0039] Aromatic solvent, 45%

Embodiment C

[0041] Test procedure: Sudan crude oil (higher acid value) 80g + distilled water 20g, preheat in a constant temperature water bath at 60°C for 5 minutes, mix manually 60 times, and rest in a constant temperature water bath for sedimentation comparison. The data of sedimentation demulsification and dehydration efficiency are as follows:

[0042]

[0043] Embodiment C demulsifier composition

[0044] New silicone polymer demulsifier (brand: 1636), 5%;

[0045] Demulsifier AP221, 10% Demulsifier BP2070, 10% Demulsifier AR2, 25%;

[0046] Dodecylbenzenesulfonic acid, 0.5% isopropanol, 1% n-butanol, 0.5%.

[0047] Mixed aromatic solvent, 51%.

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Abstract

The invention discloses a compound demulsifier for heavy inferior crude oil. The compound demulsifier can improve the emulsifying property of the oil-water interface relatively well for O / W type heavy inferior crude oil and thick oil so as to realize a relatively good dehydration effect with relatively small dosage; and moreover, the dehydration efficiency is obviously improved, and a little oil is carried by the discharged water. The composition and content of the compound demulsifier are as shown in the specification.

Description

technical field [0001] The invention belongs to the field of petroleum processing, in particular to a composite demulsifier for heavy and inferior crude oil. Background technique [0002] In the exploitation stage of heavy and low-quality crude oil, high-cost secondary and tertiary oil recovery methods are required, such as water flooding and steam oil recovery. The water content of the heavy and low-quality crude oil produced by this method increases sharply; the water content of the crude oil increases the heat energy consumption, and also increases the load of the condensing cooler and the distillation tower, and the cooling water consumption also increases. Excessive water content in crude oil will cause unstable operation of the distillation tower, and even cause tower flushing accidents in severe cases. Heavy and low-quality crude oil also has high metal content, mainly sodium, calcium, and magnesium chlorides, and NaCl has the most content. The existence of these sa...

Claims

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Application Information

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IPC IPC(8): C10G33/04
Inventor 韦伟王洪福张喜华
Owner 长江(扬中)电脱盐设备有限公司
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