Magnetically recyclable nano magnetic polyacrylic acid microsphere catalyst as well as preparation method and application thereof
A polyacrylic acid microsphere, nano-magnetic technology, applied in catalytic reactions, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve obvious economic and social benefits, good thermodynamic stability, and large reaction area.
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[0040] Such as figure 1 The preparation method of the shown magnetic recyclable nano-magnetic polyacrylic acid microsphere catalyst comprises the following steps,
[0041] (1) Nano-Fe 3 o 4 / HD ferrofluid with as figure 2 Styrene shown, such as image 3 Acrylic as shown, such as Figure 4 p-divinylbenzene as shown, when mixed to form an oily phase;
[0042] (2) deionized water and sodium lauryl sulfate are mixed to form an aqueous phase;
[0043] (3) Under stirring conditions, the oil phase is added dropwise to the water phase to obtain a black suspension;
[0044] (4) Put the black suspension in an ice-water bath, and use a 100-300W cell pulverizer to micro-emulsion for 10-30 minutes to obtain a micro-emulsion;
[0045] (5) Pour the miniemulsion into a new reaction vessel, add K in the reaction vessel 2 S 2 o 8 , under the protection of nitrogen, stirring and polymerizing at a temperature of 60-80°C for 12-24 hours to obtain ethanol demulsification;
[0046] (6) W...
Embodiment 1
[0060] Preparation method of magnetically recyclable nano-magnetic polyacrylic acid microsphere catalyst;
[0061] (1) 10g nanometer Fe 3 o 4 / HD magnetic fluid mixed with 9.1g styrene, 4.4g acrylic acid and 0.45g p-divinylbenzene to form an oil phase, ultrasonically dispersed for 10min, then 300mL deionized water and 1.8g sodium lauryl sulfate were mixed to form a water phase, Under the condition of stirring (300rpm), the oil phase was added dropwise to the water phase, and stirred for 2h to obtain a black suspension;
[0062] (2) Place the black suspension in an ice-water bath, use a 300W cell pulverizer to finely milk 30min to obtain a fine emulsion, then pour the fine emulsion into a reaction vessel, stir at a speed of 300rpm, replace the air with nitrogen for 30min, and add 0.075g K 2 S 2 o 8 , N 2 Stir under protection, raise the temperature to 70°C for constant temperature polymerization for 18 hours, break the emulsification with ethanol, wash with deionized water...
Embodiment 2
[0064] Preparation method of magnetically recyclable nano-magnetic polyacrylic acid microsphere catalyst;
[0065] (1) 7.2g nanometer Fe 3 o 4 / HD magnetic fluid mixed with 3.6g styrene, 1.44g acrylic acid and 0.22g p-divinylbenzene to form an oil phase, ultrasonically dispersed for 10min, then 270mL deionized water and 1.8g sodium lauryl sulfate were mixed to form a water phase, Under the condition of stirring (300rpm), the oil phase was added dropwise to the water phase, and stirred for 2h to obtain a black suspension;
[0066] (2) Place the black suspension in an ice-water bath, use a 300W cell pulverizer to finely milk 30min to obtain a fine emulsion, then pour the fine emulsion into a reaction vessel, stir at a speed of 300rpm, replace the air with nitrogen for 30min, and add 0.055g K 2 S 2 o 8 , N 2 Stir under protection, raise the temperature to 70°C for constant temperature polymerization for 18 hours, break the emulsion with ethanol, wash with deionized water, an...
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