Multiple combination oil soluble demulsifier

A demulsifier and compound oil technology, applied in the direction of chemical dehydration/demulsification, etc., can solve the problems of poor broad spectrum, high cost, high oil content in dehydrated water, and achieve good dehydration effect, low cost and broad spectrum. strong effect

Active Publication Date: 2010-04-14
金浦新材料股份有限公司
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Problems solved by technology

[0002] With the use of tertiary oil recovery technology, heavy oil recovery technology and offshore oil recovery technology, especially the extensive use of surfactants, polymers, and alkali flooding methods in tertiary oil recovery, the serious oil-water emulsification of oil well production fluid has caused the oil-water Separation is more difficult, and conventional demulsifiers are not ideal for dehydration of this produced fluid, such as a decrease in dehydration rate and high oil content in the produced water
At present, water-soluble demulsifiers are widely used in China. During the desalination and dehydration process of crude oil in oil fields and refineries, most of water-soluble demulsifiers are discharged with water bodies, which not only cause great harm to the environment, but also cause serious waste.
Most of the oil-soluble demulsifiers currently used in China are single-type oil-soluble demulsifiers compounded with organic solvents, and multi-component compounds are rarely used
Due to the diversity of crude oil varieties and types, the complexity of crude oil emulsion determines that the dehydration and desalination indicators of the demulsifier during t

Method used

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  • Multiple combination oil soluble demulsifier
  • Multiple combination oil soluble demulsifier
  • Multiple combination oil soluble demulsifier

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preparation example Construction

[0023] 2. Preparation of polyether with higher fatty alcohol as initiator

[0024] In the autoclave, add starter higher aliphatic alcohol, 0.1% catalyst potassium hydroxide, under the conditions of temperature 130-150°C and pressure 2-4MPa, ethylene oxide, propylene oxide, ethylene oxide alkane, the mol ratio of the front and back of ethylene oxide is 1:3. After heat preservation for 4-6 hours, cool, filter, and refine to obtain polyether with higher fatty alcohol as the initiator. Then, the polyether with higher fatty alcohol as the initiator is reacted with stearic esterification for 4 hours under the condition of catalyst p-toluenesulfonic acid at a temperature of 120-130°C and a pressure of 0.1MPa, wherein the higher fatty alcohol The molar ratio of polyether and stearic acid as the initiator is 1.1:1.

[0025] Table 3 Preparation of Polyether B1~B3 with Higher Fatty Alcohol as Initiator

[0026] initiator

[0027] Table 4 Preparation of modified polyether B11...

Embodiment 1

[0032] 40g demulsifier: 27g A11, 13g B11; 8g fluorine-containing surfactant: sodium perfluorononenyloxybenzenesulfonate; 52g solvent: C10 heavy aromatic hydrocarbon.

Embodiment 2

[0034] 36g demulsifier: 22g A12, 14g B12; 10g fluorine-containing surfactant component: sodium perfluorononenyloxybenzenesulfonate; 54g solvent: C10 heavy aromatic hydrocarbon.

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Abstract

The invention relates to a multiple combination oil soluble demulsifier which comprises 36-50 percent of demulsifier, 5-10 percent of surfactant containing fluorin and 40-59 percent of solvent, wherein the demulsifier comprises modified polyether taking phenolic resin as an initiator and modified polyether taking higher aliphatic alcohol as an initiator, and the weight ratio of the modified polyether taking the phenolic resin as the initiator to the modified polyether taking the higher aliphatic alcohol as the initiator is 0.8-3. The surfactant containing fluorin is preferably sodium perfluorous nonenyloxybenzenesulfonyl, perfluorous ethyldiethanolamine sodium phosphate or N-ethyl Perfluorooctanesulfonamide. The invention is mainly applied to atmospheric and vacuum process of a refinery with the operation temperature of 70-150 DEG C. When the use level is 3-30 ppm, the demulsifier has the advantages of good demulsifying effect, clear water and emulsion layers of demulsifying, high dehydration speed, low water content in purified oil, low oil content of water of dehydration, good broad spectrum activity and low cost.

Description

technical field [0001] The invention relates to a multi-component compound oil-soluble demulsifier, in particular to a high-efficiency demulsifier for electric desalination in oil fields and refineries. Background technique [0002] With the use of tertiary oil recovery technology, heavy oil recovery technology and offshore oil recovery technology, especially the extensive use of surfactants, polymers, and alkali flooding methods in tertiary oil recovery, the serious oil-water emulsification of oil well production fluid has caused the oil-water The difficulty of separation increases, and conventional demulsifiers are not ideal for the dehydration of this produced fluid, such as the dehydration rate decreases and the oil content of the produced water is high. At present, water-soluble demulsifiers are widely used in China. During the desalination and dehydration process of crude oil in oil fields and refineries, most of water-soluble demulsifiers are discharged with water bod...

Claims

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Application Information

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IPC IPC(8): C10G33/04
Inventor 王鹏翔葛圣才徐标余志兵王春柱尹佳子
Owner 金浦新材料股份有限公司
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