Oil field sewage flocculant and preparation method thereof

An oilfield sewage and flocculant technology, applied in separation methods, flocculation/sedimentation water/sewage treatment, mining wastewater treatment, etc., can solve the problems of clogging of cationic flocculants, affecting people's health, loss and other problems

Pending Publication Date: 2021-06-18
西安威弗莱环境控制技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that polyacrylamide, a commonly used oilfield sewage flocculant, has a decline or even loss of flocculation and settling performance in a high-salt environment, the degradation products of polyacrylamide affect people's health, cationic flocculants block pipelines, and oily oil insoluble in water exists in oilfield sewage. Substances and technical problems of poor flocculation effect of natural polymer flocculants

Method used

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  • Oil field sewage flocculant and preparation method thereof
  • Oil field sewage flocculant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A flocculant for oilfield sewage, characterized in that it comprises the following components in mass percent: polymer 88%, silica airgel / diethylenetriaminopropyl trimethoxysilane / glycidyl trimethyl chloride Ammonium 12%; the polymer is composed of sunflower oleyl pyridine quaternary ammonium salt / ethylenediamine modified oxidized walnut powder, vinyl(trifluoromethyl)dimethylsilane and 2-acrylamido-methylpropanesulfonate polymerized by acid.

[0032] Preferably, the preparation method of the sunflower oil base pyridinium quaternary ammonium salt / ethylenediamine modified oxidized walnut powder comprises the steps:

[0033] Step I, preparation of oxidized walnut shell powder: crush the walnut shell, pass through a 50-mesh sieve, soak in water for 36 hours, filter, add 1mol / L sodium hydroxide solution, alkalinize for 24 hours, filter, and wash the filter cake with water , dried to obtain walnut shell powder, then added to isopropanol, ultrasonicated for 5 minutes, added s...

Embodiment 2

[0045] A flocculant for oilfield sewage, characterized in that it comprises the following components in mass percent: polymer 89%, silica airgel / diethylenetriaminopropyl trimethoxysilane / glycidyl trimethyl chloride Ammonium 11%; the polymer is composed of sunflower oleyl pyridinium quaternary ammonium salt / ethylenediamine modified oxidized walnut powder, vinyl(trifluoromethyl)dimethylsilane and 2-acrylamido-methylpropanesulfonate polymerized by acid.

[0046] Preferably, the preparation method of the sunflower oil base pyridinium quaternary ammonium salt / ethylenediamine modified oxidized walnut powder comprises the steps:

[0047] Step I, preparation of oxidized walnut shell powder: crush the walnut shell, pass through a 60-mesh sieve, soak in water for 39 hours, filter, add 1mol / L sodium hydroxide solution, alkalinize for 27 hours, filter, and wash the filter cake with water , dried to obtain walnut shell powder, then added to isopropanol, ultrasonicated for 6 minutes, added...

Embodiment 3

[0059] A flocculant for oilfield sewage, characterized in that it comprises the following components in mass percent: polymer 90%, silica airgel / diethylenetriaminopropyl trimethoxysilane / glycidyl trimethyl chloride Ammonium 10%; the polymer is composed of sunflower oleyl pyridinium quaternary ammonium salt / ethylenediamine modified oxidized walnut powder, vinyl(trifluoromethyl)dimethylsilane and 2-acrylamido-methylpropanesulfonate polymerized by acid.

[0060] Preferably, the preparation method of the sunflower oil base pyridinium quaternary ammonium salt / ethylenediamine modified oxidized walnut powder comprises the steps:

[0061] Step I, preparation of oxidized walnut shell powder: crush the walnut shell, pass through a 70-mesh sieve, soak in water for 42 hours, filter, add 1mol / L sodium hydroxide solution, alkalinize for 30 hours, filter, and wash the filter cake with water , dried to obtain walnut shell powder, then added to isopropanol, ultrasonicated for 7 minutes, added...

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Abstract

The invention belongs to the technical field of oil field chemicals, and particularly relates to an oil field sewage flocculant which is characterized by comprising the following components in percentage by mass: 88-92% of a polymer and 8-12% of silicon oxide aerogel / diethylenetriamine propyl trimethoxy silane / glycidyl trimethyl ammonium chloride. The polymer is prepared by polymerizing sunflower seed oil-based pyridine quaternary ammonium salt / ethylenediamine modified oxidized walnut powder, vinyl (trifluoromethyl) dimethylsilane and 2-acrylamido-methylpropanesulfonic acid. The invention also provides a preparation method of the oil field sewage flocculant. The invention develops the oil field sewage flocculant which is salt-resistant, not easy to generate oil-containing flocs, good in oil displacement and flocculation effect, wide in raw material source, low in price, easy to biodegrade, safe and non-toxic.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemicals, in particular to an oilfield sewage flocculant and a preparation method thereof. Background technique [0002] In tertiary oil recovery technology, chemical flooding technology plays an important role. Due to the large difference between my country's geological reservoirs and foreign countries, polymer flooding technology is often used in the development of oil fields in the middle and later stages in China. Polymer flooding refers to adding a certain amount of water-soluble polymers to the displacement fluid to make the displacement The viscosity of the replacement phase increases, the permeability of the water phase decreases, and the swept volume of the displacement phase increases, thereby increasing crude oil production and income. With the expansion of the application of polymer flooding technology in various oil fields in my country, oil fields have also brought difficulties in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/40C02F103/10
CPCC02F1/40C02F1/56C02F2103/10
Inventor 姚静孙九立何秉涛周应学
Owner 西安威弗莱环境控制技术有限责任公司
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