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Biodegradable polymer heavy oil demulsifier and preparation method thereof

A technology of biodegradation and polymer, applied in chemical dehydration/demulsification, treatment of hydrocarbon oil, petroleum industry, etc., can solve the problems of ecological system and human society, high oil content in water, damage to natural environment, etc., to achieve Alleviate the pressure on the ecological environment, high dehydration rate, and the effect of being friendly to the ecological environment

Inactive Publication Date: 2020-09-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the existing alkylphenol-modified polyether demulsifiers have good demulsification and dehydration effects, they suffer from yellowing of the extracted water, high oil content in the water, and serious environmental pollution while causing waste of oil resources.
In addition, most of the alkylphenols are processed from precious petroleum resources. Not only is the preparation cost expensive and wastes resources, but also it is not easy to biodegrade after use, which seriously pollutes and destroys the natural environment, causing direct impact and harm to the ecological system and human society.

Method used

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  • Biodegradable polymer heavy oil demulsifier and preparation method thereof
  • Biodegradable polymer heavy oil demulsifier and preparation method thereof
  • Biodegradable polymer heavy oil demulsifier and preparation method thereof

Examples

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Effect test

Embodiment 1

[0058] A preparation method of a green biodegradable polymer heavy oil demulsifier, comprising addition polymerization of cardanol polyoxyethylene acrylate and acrylic acid to obtain a green biodegradable polymer heavy oil demulsifier, the specific process is :

[0059] Step 1, in two clean beakers, weigh 15g cardanol polyoxyethylene acrylate (BGFAA) and 6g acrylic acid (AA) respectively;

[0060] Step 2, weigh 0.315g of initiator azobisisobutyronitrile (AIBN) in a small beaker, and dissolve it with the acrylic acid weighed in step 1 to obtain solution a;

[0061] Step 3, adding cardanol polyoxyethylene acrylate (BGFAA) weighed in step 1 and 12.6 g of toluene solvent into a three-necked flask together to obtain solution b;

[0062] Step 4, after stirring the solution b in step 3 and raising the temperature to 50°C, use a constant pressure dropping funnel to add solution a dropwise, and after 30min all the addition is completed, continue to stir and heat up to 120°C;

[0063]...

Embodiment 2

[0068] A preparation method of a green biodegradable polymer heavy oil demulsifier, comprising addition polymerization of cardanol polyoxyethylene acrylate and acrylic acid to obtain a green biodegradable polymer heavy oil demulsifier, the specific process is :

[0069] Step 1, in two clean beakers, weigh 15g cardanol polyoxyethylene acrylate (BGFAA) and 3g acrylic acid (AA) respectively;

[0070] Step 2, weigh 0.306g of the initiator azobisisobutyronitrile (AIBN) in a small beaker, and dissolve it with the acrylic acid weighed in step 1 to obtain solution a;

[0071] Step 3, adding cardanol polyoxyethylene acrylate (BGFAA) weighed in step 1 and 10.8 g of toluene solvent into a three-necked flask together to obtain solution b;

[0072] Step 4: Stir the solution b in step 3 and raise the temperature to 55°C, then add the solution a dropwise with a constant pressure dropping funnel, and after 30 minutes, continue to stir and raise the temperature to 130°C;

[0073] Step 5, tim...

Embodiment 3

[0078] A preparation method of a green biodegradable polymer heavy oil demulsifier, comprising addition polymerization of cardanol polyoxyethylene acrylate and acrylic acid to obtain a green biodegradable polymer heavy oil demulsifier, the specific process is :

[0079] Step 1, in two clean beakers, weigh 12g cardanol polyoxyethylene acrylate (BGFAA) and 4g acrylic acid (AA) respectively;

[0080] Step 2, weigh 0.256g of initiator azobisisobutyronitrile (AIBN) in a small beaker, and dissolve it with the acrylic acid weighed in step 1 to obtain solution a;

[0081] Step 3, adding cardanol polyoxyethylene acrylate (BGFAA) weighed in step 1 and 11.2 g of toluene solvent into a three-necked flask together to obtain solution b;

[0082] Step 4, after stirring the solution b in step 3 and raising the temperature to 60°C, use a constant pressure dropping funnel to add solution a dropwise, and after 25 minutes, continue to stir and raise the temperature to 120°C;

[0083] Step 5, ti...

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Abstract

The invention provides a biodegradable polymer heavy oil demulsifier and a preparation method thereof. The preparation method includes the following steps: under the initiation of azodiisobutyronitrile, acrylic cardanol polyoxyethylene ester and acrylic acid are subjected to an addition polymerization reaction, and then the product is separated to obtain the biodegradable polymer heavy oil demulsifier. Addition and polymerization of the degradable acrylic acid cardanol polyoxyethylene ester (BGFAA) and acrylic acid (AA) increase molecular weight, weaken and thin an oil-water interface film andimprove the demulsification and dehydration performance, so the pressure of the ecological environment is relieved, and the concept of low-carbon economy and cyclic utilization of resources is met; and multiple aromatic groups contained in the product structure are similar to natural emulsifiers such as colloid and asphaltene in thick oil in structure, the aromatic groups can be rapidly dissolvedand diffused to the oil-water interface to play a demulsification role, the dehydration rate is high, the use amount is small, and oil-water separation is rapid.

Description

technical field [0001] The invention belongs to the technical field of oil field chemicals, and relates to the dehydration treatment of heavy oil emulsion, in particular to a biodegradable polymer heavy oil demulsifier and a preparation method thereof. Background technique [0002] In recent years, the proportion of viscous oil production has increased rapidly, and heavy oil is rich in condensed aromatic hydrocarbons such as colloids and asphaltenes. As a natural emulsifier, the presence of colloidal asphaltene will make the emulsion formed by oil production fluid very stable. However, the petroleum components extracted under different geographical environments and mining methods in different regions are very different, and the requirements for crude oil demulsifiers are also different. Conventional crude oil demulsifiers can no longer meet the needs of today's heavy oil demulsifiers. Therefore, there is an urgent need to develop a targeted viscous oil demulsifier with stro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/30C08F220/06C10G33/04
CPCC10G33/04C10G2300/208C08F220/306C08F220/06
Inventor 郭睿马丽娟闫育蒙徐康张晓飞
Owner SHAANXI UNIV OF SCI & TECH
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