Organic silicon foam with in-situ demulsification and adsorption function and application of organic silicon foam in oil-water separation

A silicone foam and demulsification technology, applied in the direction of adsorption water/sewage treatment, liquid separation, separation methods, etc., can solve the problems of high treatment cost, single lipophilic and hydrophobic function, unsuitable for steady-state oil pollution control, etc., to achieve Practical effect

Active Publication Date: 2021-04-23
GUANGDONG INST OF ANALYSIS CHINA NAT ANALYTICAL CENT GUANGZHOU
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Problems solved by technology

These methods have two problems: (i) the processing cost is relatively high, whether it is a physical method or a chemical method, it will involve the investment of site equipment and the use of demulsifiers; (ii) there are certain limitations in use, and the equipment required for the physical method is relatively fixed. It cannot be easily moved, and the energy consumption is high. Although the chemical method can be used on a large scale, the addition of demulsifiers will cause secondary pollution
For example, Guojun Liu et al. disclose the Janus method membrane material, by linking polydimethylaminoethyl methacrylate dimethylaminoethyl methacrylate or polyether with demulsification function to one side of the membrane material, and modifying polysiloxane on the other side. Alkanes have obtained the ability to separate O / W emulsions. However, the modified method is to separate in the form of membrane materials, which has great limitations in the treatment of oil-water pollution in natural waters where aquatic organisms exist.
Foam-based adsorption materials have little impact on aquatic organisms when dealing with oil pollution in natural waters, but they only have a single lipophilic and hydrophobic function, and they are powerless against O / W emulsion pollution
Shengyu Feng et al. disclosed a foam-based oil-water separation material. Although it has a demulsification function for O / W emulsions, the foam needs to be squeezed to absorb the emulsion to achieve oil absorption, which is obviously not suitable for steady-state oil pollution control in natural waters.

Method used

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  • Organic silicon foam with in-situ demulsification and adsorption function and application of organic silicon foam in oil-water separation
  • Organic silicon foam with in-situ demulsification and adsorption function and application of organic silicon foam in oil-water separation

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Such as figure 1 As shown, 1g of melamine foam was impregnated in 1×10 -3 mol / L, pH value of 10 dopamine aqueous solution, soak for 4 hours, take out, wash and dry; soak the foam in 1% 2-bromoisobutyryl bromide solution for graft modification for 4 hours, take out and wash drying; 100g tetrahydrofuran, 10g CH 2 =CH-CO-O-(EO) 10 -(CH 2 ) 4 CH 3 , and 1g catalyst (CuBr / Me 6 TREN, CuBr and Me 6 The molar ratio of TREN is 1:1) and mix evenly, add the foam impregnated with 2-bromoisobutyryl bromide dichloromethane solution, N 2 React at 60°C for 5h under atmosphere, add 25g CH 2 =CH-CO-O-(CH 2 ) 3 -[SiO(CH 3 ) 2 ] 29 Si(CH 3 ) 3, continue to react for 5h, and obtain silicone foam with in-situ demulsification and adsorption function.

[0032] 12h foam oil removal rate: cationic 88.3%, anionic 88.2%, non-ionic 87.4%.

[0033] 24h foam oil removal rate: cationic 99.5%, anionic 99.8%, non-ionic 97%.

Embodiment 2

[0045] Immerse 10g foam melamine in 5×10 -3 mol / L, pH value of 7.5 dopamine solution, soak for 48 hours, take out, wash and dry; soak the foam in 1% 2-bromoisobutyryl bromide solution for graft modification for 20 hours, take out and wash drying; 200g dichloromethane, 100g CH 2 =CH-CO-O-(EO) 20 (CH 2 ) 7 CH 3 , and 5g catalyst (CuBr / Me 6 TREN, CuBr and Me 6 The molar ratio of TREN is 1:1) and mix evenly, add the foam impregnated with 2-bromoisobutyryl bromide dichloromethane solution, N 2 Under atmosphere, react at 60°C for 10h, add 90g CH 2 =CH-CO-O-(CH 2 ) 3 -[SiO(CH 3 ) 2 ] 99 Si(CH 3 ) 3 , continue to react for 10h, and obtain silicone foam with in-situ demulsification and adsorption function.

[0046] 12h foam oil removal rate: cationic 89.3%, anionic 86.5%, non-ionic 88.3%.

[0047] 12h foam oil removal rate: cationic 98.5%, anionic 97.8%, non-ionic 96.5%.

Embodiment 3

[0049] Dip 5g of polyurethane foam into 1×10 -1 mol / L, pH value of 9 dopamine solution, soak for 40 hours, take out, wash and dry; soak the foam in 2-bromoisobutyryl bromide solution with a mass fraction of 20% for graft modification for 4 hours, take out and wash drying; 200g toluene, 100g CH 2 =CCH 3 -CO-O-(EO) 20 , and 4g catalyst (CuBr / Me 6 TREN, CuBr and Me 6 The molar ratio of TREN is 1:1) and mix evenly, add the foam impregnated with 2-bromoisobutyryl bromide dichloromethane solution, N 2 React at 100°C for 5h under atmosphere, add 40g CH 2 =CH-CO-O-(CH 2 ) 3 -[SiO(CH 3 ) 2 ] 29 Si(CH 3 ) 3 , continue to react for 10h, and obtain silicone foam with in-situ demulsification and adsorption function.

[0050] 12h foam oil removal rate: cationic 55.5%, anionic 53.8%, non-ionic 50.7%.

[0051] 24h foam oil removal rate: cationic 78.5%, anionic 74.6%, non-ionic 71.5%.

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Abstract

The invention discloses organic silicon foam with an in-situ demulsification and adsorption function and application of the organic silicon foam in oil-water separation. The organic silicon foam is prepared by the steps of at room temperature, soaking 1-10 parts by mass of foam in a dopamine aqueous solution, taking out after soaking, cleaning and drying; dipping the foam dipped by dopamine into a 2-bromo isobutyryl bromide dichloromethane solution for graft modification for 4-20 hours, taking out, cleaning and drying; uniformly mixing 100-200 parts by mass of a solvent, 10-100 parts by mass of a single-ended unsaturated polyether monomer and 1-5 parts by mass of a catalyst, adding foam impregnated with the 2-bromo isobutyryl bromide dichloromethane solution, reacting for 5-10 hours at the temperature of 60-100 DEG C in an N2 atmosphere, adding 25-90 parts by mass of single-ended unsaturated organic silicon, and continuously reacting for 5-10 hours to prepare the foam with the in-situ demulsification and adsorption function. The organic silicon foam with the in-situ demulsification and adsorption function has broad-spectrum demulsifying property and can form demulsification and adsorption on anionic, cationic and non-ionic emulsions.

Description

technical field [0001] The invention relates to the technical field of oil-water separation, in particular to a silicone foam with in-situ demulsification and adsorption function and its application in oil-water separation. Background technique [0002] In the process of urban catering, industrial production and petroleum production, illegal discharge or leakage of oil often occurs, which reduces the oxygen content of the water body, increases the content of toxic and harmful substances, causes a large number of aquatic organisms to die and even leads to ecological disasters. The dispersion state of oil in water can be divided into three states: incompatible state (slick oil), unsteady state (dispersed oil) and stable state (emulsified oil). For the incompatible state and some unsteady state oil pollution problems, it can be solved by simple physical adsorption, fence burning and other methods. For the problem of steady-state oil pollution, oil is dispersed in water in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/40
CPCB01J20/265B01J20/28045C02F1/285C02F1/40Y02A20/204
Inventor 刘海峰孙一峰王建业陈中慧
Owner GUANGDONG INST OF ANALYSIS CHINA NAT ANALYTICAL CENT GUANGZHOU
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