Purifying agent for oilfield sewage treatment and preparation method of purifying agent

An oilfield sewage and purifying agent technology, which is applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. Improved contact area and good thermal stability

Inactive Publication Date: 2018-12-14
ZHENGZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the cleaning agent treats sewage, it is necessary to demulsify the inorganic unit first, and then add the organic unit to remove oil. The steps are cumbersome, and the COD removal rate is only 30%, and the sewage purification effect is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]A purifying agent for oilfield sewage treatment, the components and contents thereof are shown in Table 1, wherein the surfactant is sorbitan oleate.

[0034] The preparation method of described modified expanded graphite comprises the following steps:

[0035] S1: Add expanded graphite to a phosphoric acid solution with a mass fraction of 3-5%, stir at room temperature for 20 minutes at a speed of 200r / min, add sucrose and coupling agent, keep the speed constant, and continue stirring for 18 minutes to obtain a mixed solution one;

[0036] S2: Put the mixed solution obtained in step S1 in an oven for 6 hours at 80°C, add a zinc chloride solution with a mass fraction of 20%, place it in a reaction kettle, fill it with nitrogen, and keep the pressure at 0.8-1.2MPa, After stirring for 3 hours at 60°C at a speed of 200r / min, the mixed solution 2 was obtained;

[0037] S3: Place the mixed solution 2 obtained in step S2 in a sodium carbonate solution with a mass fraction of...

Embodiment 2

[0048] A purifying agent for oilfield sewage treatment, the components and contents thereof are shown in Table 1, wherein the surfactant is polyoxyethylene alkylphenol ether.

[0049] The preparation method of described modified expanded graphite comprises the following steps:

[0050] S1: Add expanded graphite to a phosphoric acid solution with a mass fraction of 3-5%, stir at room temperature for 18 minutes at a speed of 230r / min, add sucrose and coupling agent, keep the speed constant, and continue stirring for 17 minutes to obtain a mixed solution one;

[0051] S2: Put the mixed solution obtained in step S1 in an oven for 6 hours at 80°C, add a zinc chloride solution with a mass fraction of 20%, place it in a reaction kettle, fill it with nitrogen, and keep the pressure at 0.8-1.2MPa, After stirring at 250r / min at 60°C for 2.5h, the mixed solution 2 was obtained;

[0052] S3: Place the mixed solution 2 obtained in step S2 in a sodium carbonate solution with a mass fracti...

Embodiment 3

[0063] A purifying agent for oilfield sewage treatment, the components contained and their contents are shown in Table 1, wherein the surfactant is a mixture of sorbitan oleate and polyoxyethylene alkylphenol ether, by weight The ratio of sorbitan oleate:polyoxyethylene alkylphenol ether is 1:3.

[0064] The preparation method of described modified expanded graphite comprises the following steps:

[0065] S1: Add expanded graphite to a phosphoric acid solution with a mass fraction of 3-5%, stir at room temperature for 15 minutes at a speed of 250r / min, add sucrose and coupling agent, keep the speed constant, and continue stirring for 15 minutes to obtain a mixed solution one;

[0066] S2: Put the mixed solution obtained in step S1 in an oven for 6 hours at 80°C, add a zinc chloride solution with a mass fraction of 20%, place it in a reaction kettle, fill it with nitrogen, and keep the pressure at 0.8-1.2MPa, After stirring for 2 hours at 60°C at a speed of 300r / min, the mixe...

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Abstract

The invention discloses a purifying agent for oilfield sewage treatment and a preparation method of the purifying agent, and belongs to the technical field of sewage treatment. The purifying agent isprepared from the following components in parts by weight: 22-28 parts of modified expanded graphite, 5-8 parts of cobalt nitrate hexahydrate, 12-16 parts of zinc sulfate, 5.5-9 parts of a surfactant,3-5 parts of chitosan, 2.5-5 parts of methylacryloyloxyethyl trimethyl ammonium chloride and 40-50 parts of water. According to the invention, through organic combination of all the materials, the sewage purifying agent is prepared under a synergistic effect of all the components, and the purifying agent has a large specific surface area, a large micropore volume, a developed microporous structure, high capability of adsorbing impurities such as heavy metal ions and suspended matter, and remarkable oil removal and decontamination effects. The removal rate of chemical oxygen demand (COD) is larger than or equal to 96.6%, the removal rate of suspended solids is larger than or equal to 97.2%, the oil removal rate is larger than or equal to 98%, and the removal rate of the heavy metal ions islarger than or equal to 94.7%. Purified water is clear and transparent, and requirements for purification treatment of the oilfield sewage are met.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a purifying agent for oilfield sewage treatment and a preparation method thereof. Background technique [0002] Oilfield sewage mainly includes crude oil dehydration, drilling sewage and other types of oily sewage in the station. There are many ways to treat oilfield sewage according to factors such as oilfield production and environment. When the oil field needs water injection, the oil field sewage is treated and reinjected into the formation. At this time, it is necessary to strictly control the suspended solids, oil and other indicators in the water to prevent it from causing damage to the formation. Therefore, the calcium, magnesium, etc. in the water must be strictly controlled. The ion content that is easy to scale, and the oil content in the water, etc. After the oilfield enters the high water-cut development period, measures such as water shutoff, acidification...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/54C02F1/40C02F1/28B01J23/75C02F101/20
CPCB01J20/20C02F1/281C02F1/40C02F1/54B01J23/75C02F2101/20
Inventor 郭晓琴李钦奎谢光辉李玉玲
Owner ZHENGZHOU INST OF TECH
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