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Preparation method of oily sewage treatment filter material modifier

A technology of modifier and oily sewage, which is applied in the field of preparation of filter material modifiers for oily sewage treatment, which can solve the problems of difficult filter material, increased filter resistance, increased filter pressure, etc., and achieve good durability

Active Publication Date: 2021-01-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The agglomeration and compaction of the filter material lead to an increase in filtration resistance, a decrease in flux, and an increase in filtration pressure;
[0004] 2. After the filter material is agglomerated, its relative density is reduced. During backwashing, the lighter the density, the more serious the puffing. After the expansion height exceeds the screen tube, a large amount of filter material and oil directly enter the water distribution screen tube and the filter tube without blocking. The dead angle between the tank tops will block the water distribution screen, resulting in a sharp rise in backwash pressure, a rapid drop in backwash water output, ineffective backwashing, and difficulty in regeneration of filter materials, forming a vicious circle;
[0005] 3. After the water distribution screen is blocked, the backwash pressure is too high and even the screen is broken, and a large amount of filter material is lost at the same time, so the filter cannot continue to operate
However, the patent does not explain the oil and water wettability of the filter material in oily sewage and the chemical stability of acid and alkali resistance.

Method used

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  • Preparation method of oily sewage treatment filter material modifier
  • Preparation method of oily sewage treatment filter material modifier
  • Preparation method of oily sewage treatment filter material modifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 10 g of microcrystalline cellulose with a size of ~20 microns was added to 100 ml of sulfuric acid solution with a volume concentration of 64%, and mechanically stirred at 45° C. for 4 hours to fully hydrolyze it. Add water to wash off excess acid by centrifugation, and then add water to dilute until it is just neutral to obtain an aqueous solution of cellulose nanocrystals. Add 5g of acidic chain silica sol (pH=2~4, diameter 10~15nm, chain length 80~120nm, mass concentration 15~16%) into 20g cellulose nanocrystal aqueous solution, at 50°C at 300r / min Stir magnetically at a high speed for 1 hour, then add 0.75g of water-based epoxy resin, 0.75g of acrylic resin, and 0.1% of N,N-methylenebisacrylamide curing agent, heat to 50°C and fully react for 24 hours, then spray on the glass On the chip, after drying at 80 °C, a superhydrophilic coating was obtained. The surface of the coating is dense and smooth as figure 1 As shown, it is superhydrophilic in air ( figure 2 a)...

Embodiment 2

[0040] 20 g of microcrystalline cellulose with a size of ~50 microns was added to 200 ml of sulfuric acid solution with a volume concentration of 50%, and mechanically stirred at 60° C. for 6 hours to fully hydrolyze it. Add water to wash off excess acid by centrifugation, and then add water to dilute until it is just neutral to obtain an aqueous solution of cellulose nanocrystals. Add 15g of acidic spherical silica sol (pH=2~4, diameter 4~7nm, mass concentration 20%) into 3g of cellulose nanocrystal aqueous solution and 17g of water, stir magnetically at a speed of 300r / min at 50°C for 1h, then Add 0.75g of water-based polyurethane, 0.75g of water-based epoxy resin, and 0.1% of N,N-methylenebisacrylamide curing agent, heat to 50°C and fully react for 24 hours, then spray it on a glass slide, and after drying at 80°C, Get a super-hydrophilic coating. It is super-hydrophilic in air, with a water contact angle of 8°. It is super oleophobic under water, and the underwater conta...

Embodiment 3

[0042] 5 g of microcrystalline cellulose with a size of ~80 μm was added to 50 ml of hydrochloric acid solution with a volume concentration of 64%, and mechanically stirred at 30° C. for 6 h to fully hydrolyze it. Add water to wash off excess acid by centrifugation, and then add water to dilute until it is just neutral to obtain an aqueous solution of cellulose nanocrystals. Add 15g of alkaline spherical silica sol (pH=9~11, diameter 8-11nm, mass concentration 20%) into 3g cellulose nanocrystal aqueous solution and 17g water, and stir magnetically at 300r / min at 50°C for 1h, Then add 1.5g of water-based epoxy resin and 0.1% of divinylbenzene curing agent, heat to 50°C and fully react for 12h, then spray it on a glass slide and dry at 80°C to obtain a super-hydrophilic coating. It is super-hydrophilic in air, with a water contact angle of 12°. It is super oleophobic under water, and the underwater contact angle is 149°. It is super-hydrophilic under oil, and the water contact...

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Abstract

The invention discloses a preparation method of an oilfield oily sewage treatment filter material modifier. The preparation method comprises three steps of preparing a cellulose nanocrystalline aqueous solution, preparing a modified nano silica sol aqueous solution and preparing the filter material modifier. The surface of the modified filter material produced by the method has an underwater self-cleaning effect, the oil pollution resistance is high, and the maintenance frequency of the filter can be reduced. The formed under-oil super-hydrophilic coating is stable in physicochemical propertyfor a long time, can be effectively applied to up-to-standard treatment of oilfield reinjection sewage, reduces the treatment cost, and has good economic benefits.

Description

technical field [0001] The invention belongs to the technical field of new materials for oily sewage treatment in oil fields, and in particular relates to a preparation method of a filter material modifier for oily sewage treatment. Background technique [0002] At present, the domestic oilfield oily sewage reinjection water treatment is generally divided into three stages: sedimentation, oil removal, and filtration. The filtration stage is still dominated by conventional pressure filter material filtration devices. The filter material generally uses walnut shells, quartz sand, emery, fiber balls, etc. . With the deepening of oil field development, the physical and chemical properties of oily sewage have changed. During the use of conventional filters, the filter materials filled in the filter, such as walnut shells, quartz sand, etc., will be suspended with a large amount of mineral oil and solids as the filter progresses. Particles and other pollutants are attached to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D101/04C09D163/00C09D133/04C09D175/04C09D1/00C02F1/40
CPCC09D101/04C09D175/04C09D163/00C09D1/00C02F1/40C08L2205/03C08L63/00C08L33/04C08L1/04C08L75/04
Inventor 林刚时维才庄建全纪艳娟
Owner CHINA PETROLEUM & CHEM CORP
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