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Demulsifier used for oil-water separation of storage tank crude oil

A technology of oil-water separation and demulsifier, which is applied in the direction of chemical dehydration/demulsification, etc. It can solve the problems of poor applicability, dissolution, poor dispersion performance, and excess, so as to achieve enhanced application performance and effect, clear oil-water interface, Enhanced broad-spectrum effect

Inactive Publication Date: 2016-08-24
江苏三星能源装备有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few low-temperature demulsifiers in the market, and the formula adopts specific varieties. Most of them use water and low-molecular alcohols as solvents. They are used for specific crude oil under specific process conditions. They do not have broad spectrum and poor applicability.
Disclosed as CN101100615A is a kind of low-temperature demulsifier and preparation method thereof, adopts methanol and water as solvent, must be dissolved in the crude oil emulsion like this, dispersibility is poor
What CN1011029252A discloses is a kind of dehydration low-temperature demulsifier of crude oil production fluid, also adopts methanol and water as solvent, has also adopted multiple functional demulsifiers as its component, is easy to surpass the cloud point of demulsifier when diluting and using, Affect the normal function of the demulsifier
And when the molecular HLB value of the demulsifier is small; when the relative solubility index of RSN [ml] is low, it will be difficult to dissolve and disperse in the water-methanol polar solvent system, which limits the compound application of many types and varieties of demulsifiers, resulting in broken The application effect of emulsion is poor, especially for heavy crude oil, and it does not have broad spectrum

Method used

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  • Demulsifier used for oil-water separation of storage tank crude oil
  • Demulsifier used for oil-water separation of storage tank crude oil
  • Demulsifier used for oil-water separation of storage tank crude oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0021] Crude oil emulsion low temperature demulsifier composition: polyether type demulsifier (brand: BP2040), 10%; phenolic resin type polyether demulsifier (brand: AR36), 20%; phenolic resin type polyether demulsifier (brand: BASOROL P DB-9945), 20%; dodecylbenzenesulfonic acid, 0.5%; mixed aromatic solvent (brand: S-1000), 48.5%; isopropanol, 1%.

[0022] Heat the demulsifier dry agent to 80°C in a water bath to make it have better fluidity. Add 485 kg of mixed aromatic solvent S-1000 and 10 kg of isopropanol into a reaction kettle with a heat preservation jacket, and add 100 kg of heated functional demulsifier BP2040 in batches at a stirring speed of 120 r / min. Kilogram, 200 kilograms of AR36, 200 kilograms of BASOROLP DB-9945, finally add 5 kilograms of additive dodecylbenzenesulfonic acid, and continue to stir to obtain the final product after 15 minutes.

[0023] The performance index of obtained crude oil emulsion low temperature demulsifier is as follows:

[0024] ...

Embodiment B

[0026] Crude oil emulsion low temperature demulsifier composition: polyether type demulsifier (brand: AP121), 15%; Phenolic resin type polyether demulsifier (brand: BASOROL P DB-9947), 20%; Polyamine polyether demulsifier ( Brand: BASOROL 701), 20%; dodecylbenzenesulfonic acid, 0.55%; mixed aromatic solvent (brand: S-1500), 42.45%; isopropanol, 2%.

[0027] Heat the demulsifier dry agent to 80°C in a water bath to make it have better fluidity. Add 424.5 kg of mixed aromatic solvent S-1500 and 20 kg of isopropanol into a reaction kettle with a heat preservation jacket, and add 150 kg of heated functional demulsifier AP121 in batches at a stirring speed of 120 r / min. Kilogram, 200 kilograms of BASOROL P DB-9947, 200 kilograms of BASOROL701, finally add 5.5 kilograms of additive dodecylbenzenesulfonic acid, and continue to stir to obtain the final product after 15 minutes.

[0028] The performance index of obtained crude oil emulsion low temperature demulsifier is as follows:

...

Embodiment C

[0031] Crude oil emulsion low temperature demulsifier composition: phenolic resin type polyether demulsifier (brand: BASOROL P DB-9935), 15%: PO / EO block polyether demulsifier (brand: BASOROL 150R1), 15%; multifunctional type Polyether demulsifier (brand: BASOROL E9289), 20%; dodecylbenzenesulfonic acid, 0.5%; mixed aromatic hydrocarbon solvent (brand: S-1500), 48%; isopropanol, 1.5%.

[0032] Heat the demulsifier dry agent to 80°C in a water bath to make it have better fluidity. Add 480 kg of mixed aromatic solvent S-1500 and 15 kg of isopropanol into a reaction kettle with a heat preservation jacket, and add the heated functional demulsifier BASOROL P DB in batches at a stirring speed of 120 r / min -9935 counts 150 kg, BASOROL 150R1 counts 150 kg, BASOROL P E9289 counts 200 kg, finally adds 5 kg of additive dodecylbenzenesulfonic acid, and continues stirring for 15 minutes to obtain the final product.

[0033] The performance index of obtained crude oil emulsion low temperat...

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Abstract

The invention discloses a demulsifier used for oil-water separation of storage tank crude oil. The demulsifier basically comprises 35-65% of functional demulsifier, 1-10% of low temperature complex agents, 0.5-5% of additives and 35-65% of organic solvents. A production method of the demulsifier is characterized by being produced by compounding in a reaction kettle with a jacket. The low temperature demulsifier is suitable for different types of crude oil and has better application performances than existing varieties of low temperature demulsifiers.

Description

technical field [0001] The invention belongs to the field of petrochemical technology, and in particular relates to a demulsifier for the separation of crude oil-water emulsion in storage tanks, which is suitable for use in the low-temperature dehydration of oilfield production fluid and the low-temperature pretreatment process of oil-water emulsion in crude oil storage tanks in refineries Background technique [0002] Oilfield production fluid is a kind of crude oil emulsion. Generally, after thermal chemical sedimentation dehydration and electric dehydration treatment, the water content of crude oil is less than 0.5%, which meets the requirements for export. According to the characteristics of different crude oil emulsions, low-temperature demulsifiers are selected to reduce the operating temperature of thermochemical sedimentation and electric dehydration processes, which can save a lot of heat energy consumption. Similarly, crude oil will be mixed with a certain amount o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
Inventor 韦伟姚磊
Owner 江苏三星能源装备有限公司