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Oil-water separation granule and preparation method thereof

A technology of oil-water separation and pellets, which is applied in the direction of separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of complex and cumbersome preparation methods, unstable hydrophobicity, and inability to recycle, and achieves wide application prospects and no heavy metals Residual, easy-to-recycle effect

Inactive Publication Date: 2015-04-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material is not hydrophobic enough to stabilize
[0004] In general, although the superhydrophobic / superoleophilic materials in the prior art can achieve oil-water separation, there are also problems such as complicated and cumbersome preparation methods, high manufacturing costs, poor stability, and cannot be recycled, or introduce heavy metals and other Toxic and harmful components can cause defects such as secondary pollution

Method used

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  • Oil-water separation granule and preparation method thereof
  • Oil-water separation granule and preparation method thereof
  • Oil-water separation granule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1: Mix 2.5g of urea and 6.33g of 37% formaldehyde solution by mass, adjust the pH to 8 with 1mol / L sodium hydroxide, stir and react at 70°C for 1h, and prepare a soluble prepolymer of urea-formaldehyde aqueous solution.

[0031] Step 2: Mix all the urea-formaldehyde prepolymer aqueous solution obtained in step 1 with 75ml of an aqueous solution containing 0.55% ethylene-maleic anhydride copolymer and 0.35% resorcinol to obtain an aqueous phase, and adjust the aqueous phase with an aqueous citric acid solution After the pH reached 1.5, 10 g of hexamethylene diisocyanate was added dropwise, and stirred at room temperature for 20 minutes at a speed of 600 rpm, then reduced to 200 rpm and reacted at 25°C for 40 minutes, then heated to 55°C for 1 hour, and cooled to room temperature to terminate the reaction. The resulting product was washed with water, filtered, and dried at room temperature for 48 hours for later use.

[0032] Step 3: Mix the dry product obtained in ...

Embodiment 2

[0038] Step 1: Mix 2.5g of urea and 6.33g of 37% formaldehyde solution by mass, adjust the pH to 8 with 1mol / L sodium hydroxide, stir and react at 70°C for 1h, and prepare a soluble prepolymer of urea-formaldehyde aqueous solution.

[0039] Step 2: Mix all the urea-formaldehyde prepolymer aqueous solution obtained in step 1 with 75ml of an aqueous solution containing 0.55% ethylene-maleic anhydride copolymer and 0.35% resorcinol to obtain an aqueous phase, and adjust the aqueous phase with an aqueous citric acid solution After the pH reached 1.5, 10 g of hexamethylene diisocyanate was added dropwise, and stirred at room temperature for 20 minutes at a speed of 800 rpm, then reduced to 200 rpm and reacted at 25°C for 40 minutes, then heated to 55°C for 1 hour, and cooled to room temperature to terminate the reaction. The resulting product was washed with water, filtered, and dried at room temperature for 48 hours for later use.

[0040] Step 3: Mix the dry product obtained in ...

Embodiment 3

[0046] Step 1: Mix 2.5g of urea and 6.33g of 37% formaldehyde solution by mass, adjust the pH to 8 with 1mol / L sodium hydroxide, stir and react at 70°C for 1h, and prepare a soluble prepolymer of urea-formaldehyde aqueous solution.

[0047] Step 2: Mix all the urea-formaldehyde prepolymer aqueous solution obtained in step 1 with 75ml of an aqueous solution containing 0.55% ethylene-maleic anhydride copolymer and 0.35% resorcinol to obtain an aqueous phase, and adjust the aqueous phase with an aqueous citric acid solution After the pH reached 1.5, 10g of 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane was added dropwise, and stirred at room temperature for 20min at a speed of 700rpm, then reduced to 200rpm and reacted at 25°C for 40min, then heated to 55°C ℃ for 1 h, cooled to room temperature to terminate the reaction, the resulting product was washed with water, filtered, and dried at room temperature for 48 h for use.

[0048] Step 3: Mix the dry product obtained in Step 2 wit...

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Abstract

The invention discloses an oil-water separation granule and a preparation method thereof. The oil-water separation granule is of a micron-nanometer multi-stage surface structure and a hollow or porous internal structure, and the average diameter of the granule can be controlled to be 10-1,000 microns. The preparation method comprises the following steps: adding a surfactant and a water solution containing polyphenol into a urea-formaldehyde pre-polymer water solution, regulating the pH value through acid, and adding liquid-state oil; and performing stirring, washing and drying, mixing the product with an aprotic solvent or a poly-functional protic solvent in the ratio, and then performing washing, filtering and drying. The contact angle between the surface of the oil-water separation granule and water is greater than 150 degrees, and the contact angle between the surface of the oil-water separation granule and oil is approximate to 0 degree, so that super-hydrophobicity and super-lipophilicity are represented; according to the hollow or porous internal structure, oil can be efficiently and quickly absorbed by the granule, the separation efficiency of an oil-water mixture is high, the separation amount of the oil-water mixture is large, and the performance is stable. The oil-water separation granule can be widely applied to the fields of large-scale separation and purification of industrial oil and water, abatement of oil-spilled pollution and the like. The preparation method is simple and efficient as well as large in preparation amount and low in cost.

Description

technical field [0001] The invention relates to an oil-water separation granular material and a preparation method thereof, belonging to the technical field of functional material preparation. Background technique [0002] The quality of oil products is directly affected by the moisture and impurity content in oil products. Therefore, it is an important research field of separation technology to seek economical, practical, continuous and high-throughput methods to remove water in oil products. In addition, the discharge of emulsified oil and water in industrial production and the leakage during oil transportation and transportation have caused serious environmental pollution, especially the pollution of the water body environment, which seriously endangers human health, which makes the separation of oil and water important in environmental protection. field is also very important. [0003] Utilizing the special wetting property of superhydrophobicity, the separation of oil-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D17/022
Inventor 吴刚向勇吴露孔梓玮叶涛
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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