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Coalescence material for emulsified water as well as preparation method and application of coalescence material

A technology of coalescing materials and emulsifying water, which is applied in chemical instruments and methods, separation methods, liquid separation, etc., can solve the impact of the oil-water separation without considering the surfactant type and concentration, and the stability of the oil-water emulsion , Analyzing the impact of surfactants and other issues, to achieve the effect of improving the efficiency of oil-water separation

Inactive Publication Date: 2020-02-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN105964014B discloses that the dopamine-mediated layer is sprayed on the stainless steel net to undergo an amidation coupling reaction, so that a stable hydrophilic polymer film is formed on the surface, which has a significant effect for oil-water separation, but it does not consider the type of surfactant Effect of concentration and concentration on the stability of oil-water emulsion
[0005] CN105926020B discloses super-hydrophilic titanium foam used for oil-water separation, which has a remarkable oil-water separation effect, but it does not consider that the existence of surfactants at the oil-water interface will be unfavorable for oil-water separation.
However, in the current examples of oil-water separation, there are few studies on the specific analysis of the impact of surfactants on oil-water separation.

Method used

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  • Coalescence material for emulsified water as well as preparation method and application of coalescence material
  • Coalescence material for emulsified water as well as preparation method and application of coalescence material
  • Coalescence material for emulsified water as well as preparation method and application of coalescence material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] An emulsified water coalescing material, including stainless steel felt with a pore size of 8 μm and a fluorine-containing polyurethane coating coated on the surface of the stainless steel felt, the fluorine-containing polyurethane coating-C 3 f 7 -and-CH 2 CH 2 The molar ratio of O- is 6:1.

[0075] The preparation steps are as follows:

[0076](1) Preparation of fluorine-containing polyurethane emulsion: In a nitrogen atmosphere, under the condition of a constant temperature of 60°C, in parts by weight, add 6 parts of fluorine-containing alcohol (fluorine-containing alcohol structure: X-Y-N(R)-R' OH, wherein the number of carbon atoms in the fluorine-containing alkyl chain X is 3, the transition group Y is sulfoxyl, R and R' are alkyl chains with 3 and 5 carbon atoms respectively), acetone and dibutyltin diacetate , after fully mixing, add 5 parts of HDI, stir at constant temperature at 60°C for 2 hours, make it fully react to obtain the product; continue stirring...

Embodiment 2

[0081] An emulsified water coalescing material comprises a melt-blown polymer fiber filter medium with a pore size of 10 μm and a fluorine-containing polyurethane coating coated on the surface of the melt-blown polymer fiber filter medium. Fluorine-containing polyurethane coating-C 4 f 9 -and-CH 2 CH 2 The molar ratio of O- is 4:1.

[0082] The preparation steps are as follows:

[0083] (1) Preparation of fluorine-containing polyurethane emulsion: under a nitrogen atmosphere, at a constant temperature of 70°C, in parts by weight, add 4 parts of fluorine-containing alcohol (fluorine-containing alcohol structure: X-Y-N(R)-R'OH, Wherein the number of carbon atoms of the fluorine-containing alkyl chain X is 4, the transition group Y is a sulfoxyl group, R and R' are respectively an alkyl chain with 3 and 5 carbon atoms), acetone and dibutyltin diacetate, fully After mixing, add 2 parts of TDI, stir at a constant temperature of 70°C for 1 hour, make it fully react to obtain th...

Embodiment 3

[0088] An emulsified water coalescing material, comprising a stainless steel felt with a pore size of 12 μm and a fluorine-containing polyurethane coating coated on the surface of the stainless steel felt. Fluorine-containing polyurethane coating-C 5 f 11 -and-CH 2 CH 2 The molar ratio of O- is 4:1.

[0089] The preparation steps are as follows:

[0090] (1) Preparation of fluorine-containing polyurethane emulsion: under nitrogen atmosphere, at a constant temperature of 55°C, in parts by weight, add 2 parts of fluorine-containing alcohol (fluorine-containing alcohol structure: X-Y-N(R)-R'OH, The number of carbon atoms in the fluorine-containing alkyl chain X is 5, the transition group Y is sulfoxyl, R and R' are alkyl chains with 3 and 5 carbon atoms respectively), butanone and dibutyltin dilaurate After fully mixing, add 5 parts of TDI, stir at a constant temperature of 55 ° C for 2 hours, make it fully react to obtain the product; continue to stir the above product at a...

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Abstract

The invention relates to a coalescence material for emulsified water as well as a preparation method and application of the coalescence material. The coalescence material for the emulsified water includes a substrate and a fluorine-containing polyurethane coating layer coating the surface of the substrate. The fluorine-containing polyurethane coating layer of the coalescence material contains a hydrophobic fluorine-containing chain segment and a hydrophilic chain segment, thereby having hydrophobic and lipophilic characteristics in the air; the contact angle between the fluorine-containing polyurethane coating layerandwater drops is 100-120 degrees, the contact angle between the fluorine-containing polyurethane coating layerandoil drops is 50-80 degrees, the contact angle of water under oil changes dynamically and decreases from 120-150 degrees to 50-80 degrees within 2 min, so that favorable conditions are provided for demulsification mixingof liquid drops in a water-oil emulsion, andcompared with other fluorocarbon materials in the prior art, the coalescence material provided by the invention has a significantly better coalescence and separation effect on the emulsified water; and the coalescence material is suitable for the separation of the water-oil emulsion containing different types and different concentrations of surfactants, and the water-oil separation efficiency isas high as 91-98%.

Description

technical field [0001] The invention relates to the technical field of oil-water separation materials, in particular to an emulsified water coalescence material and its preparation method and application. Background technique [0002] The national V standard is gradually adopted for vehicle diesel, and the sulfur content in diesel is greatly reduced. The hydrodesulfurization treatment of diesel oil reduces its lubricity and stability, so lubricants, anti-wear agents, stabilizers, preservatives and other substances with surface activity are artificially added to ultra-low sulfur diesel. However, when the temperature difference between day and night is large during diesel transportation or diesel storage, water is easy to enter the oil phase, and the shearing of the oil pump on the engine and the diffusion of surfactants to the oil-water interface form relatively stable and difficult-to-separate emulsified water. . The surfactant in the diesel oil moves to the oil-water inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/022
CPCB01D17/02
Inventor 杨传芳李艳香张倩王莹李蕾
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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