A kind of preparation method of colorless transparent sodium polyacrylate dispersant
A technology of sodium polyacrylate and dispersant, which is applied in the field of preparation of sodium polyacrylate to achieve the effect of increasing shelf life, reducing production cost and preventing mold
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Embodiment 1
[0030] Step (1): Add a 3.4% sodium hypophosphite aqueous solution into the reactor as an initial solution, the liquid level of the initial solution is higher than the stirring blades of the reactor, and the temperature of the reactor is adjusted to 80°C;
[0031] Step (2): Add the acrylic acid aqueous solution, the ammonium persulfate aqueous solution and the sodium hypophosphite aqueous solution into the reactor at a constant speed and in parallel, wherein the mass ratio of the acrylic acid and ammonium persulfate is 40; the acrylic acid and sodium hypophosphite The mass ratio is 20; the stirring speed is kept at 300rpm during the dropping process, and the temperature of the reactor is maintained at 85°C until the dropping process ends;
[0032] Step (3): Adjust and maintain the temperature of the reactor at 70°C, add benzoyl peroxide to the reactor, wherein the mass ratio of acrylic acid to benzoyl peroxide is 300, when benzoyl peroxide After the acyl is fully stirred evenly...
Embodiment 2
[0034] Step (1): Add 3.4% sodium hypophosphite aqueous solution into the reaction kettle as the initial solution, the liquid level of the initial solution is higher than the stirring blade of the reaction kettle, and the temperature of the reaction kettle is adjusted to 60°C;
[0035] Step (2): Acrylic acid aqueous solution, benzoyl peroxide aqueous solution and sodium hypophosphite aqueous solution are respectively added in the reaction kettle at a constant speed in parallel, wherein the mass ratio of the acrylic acid and benzoyl peroxide is 40; acrylic acid and The mass ratio of sodium hypophosphite is 20; the stirring speed is kept at 300rpm during the dropping process; light is used for the first stage of irradiation in the reactor, and a 50W high-pressure mercury lamp is used for irradiation, the main wavelength is 365nm, and the irradiation area of the light is the inside of the reactor 3 / 4 of the cross-sectional area, the distance between the reactor and the light emit...
Embodiment 3
[0038] Step (1): Add a 3.4% aqueous solution into the reaction kettle as an initial solution, the liquid level of the initial solution is higher than the stirring blade of the reaction kettle, and adjust the temperature of the reaction kettle to 80°C;
[0039] Step (2): Add the acrylic acid aqueous solution, the ammonium persulfate aqueous solution and the sodium hypophosphite aqueous solution into the reactor at a constant speed and in parallel, wherein the mass ratio of the acrylic acid and ammonium persulfate is 40; the acrylic acid and sodium hypophosphite The mass ratio is 20; the stirring speed is kept at 300rpm during the dropping process, and the temperature of the reactor is maintained at 85°C until the dropping process ends;
[0040] Step (3): The reaction kettle is irradiated with light in the second stage, using a 75W fluorescent lamp for irradiation, the main wavelength range is 450nm, and the irradiation area of the light is 3 / 4 of the internal cross-sectional a...
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