Method for preparing cationic polyacrylamide through photo-initiating system
A technology for polyacrylamide and acrylamide monomers is applied in the field of preparing cationic polyacrylamide by a novel photoinitiating system, which can solve the problems of high thermal initiation energy consumption, many types of additives, low production efficiency and the like, and achieves low reaction energy consumption, Easy to select and fast response effects
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[0025] Example 1:
[0026] A method for preparing CPAM flocculant by photo-initiated system, the specific steps are as follows:
[0027] In the first step, 25.5 ml of deionized water, 7.2 g of acrylamide monomer (accounting for 90% of the total monomer mass, and the total monomer accounting for 20% of the total mass of the reaction system), 0.8 g of DMC monomer ( Accounted for 10% of the total monomer mass), 2.0ml cosolvent urea (solution concentration 8.0×10 -3 g / ml, accounting for 2.0‰ of the total monomer mass), after complete dissolution, adjust the pH of the above solution to 3 with weak acid or weak base.
[0028] In the second step, while filling the reaction device with high-purity nitrogen to remove the air in the reaction device, 0.5ml of V-044 (solution concentration 9.6×10 -4 g / ml, accounting for 0.06‰ of total monomer mass), 2.0ml potassium persulfate (solution concentration 2.0×10 -3 g / ml, accounting for 0.5‰ of total monomer mass), 2.0ml of sodium bisulfite (solution c...
Example Embodiment
[0031] Example 2:
[0032] A method for preparing CPAM flocculant by photo-initiated system, the specific steps are as follows:
[0033] In the first step, 15.0ml of deionized water, 4.0g of acrylamide monomer (accounting for 20% of the total monomer mass, 50% of the total mass of the reaction system), 16.0g of DMC monomer (accounting for Total monomer mass 80%), co-solvent urea 1.0ml (solution concentration 1.0×10 -2 g / ml, accounting for 0.5‰ of the total monomer mass), after completely dissolved, adjust the pH of the above solution to 9 with a weak acid or weak base.
[0034] In the second step, while filling the reaction device with high-purity nitrogen to eliminate the air in the reaction device, adding 2.0ml of V50 (solution concentration 6.0×10 -3 g / ml, accounting for 0.6‰ of total monomer mass), 1.0ml of ammonium persulfate (solution concentration 6.0×10 -4 g / ml, accounting for 0.03‰ of total monomer mass), 1.0ml sodium sulfite (solution concentration 1.2×10 -3 g / ml, accountin...
Example Embodiment
[0037] Example 3:
[0038] A method for preparing CPAM flocculant by photo-initiated system, the specific steps are as follows:
[0039] In the first step, 30.0ml of deionized water, 4.2g of acrylamide monomer (accounting for 70% of the total monomer mass and 15% of the total mass of the reaction system), 1.8g of DMDAAC monomer (accounting for Total monomer mass 30%), co-solvent urea 1.0ml (solution concentration 2.4×10 -3 g / ml, accounting for 0.4‰ of the total monomer mass), after completely dissolved, adjust the pH of the above solution to 6 with a weak acid or a weak base.
[0040] In the second step, the reaction device was filled with high-purity nitrogen to remove the air in the reaction device, and 1.0ml of V50 (solution concentration 1.2×10 -3 g / ml, accounting for 0.2‰ of total monomer mass), 1.0ml potassium persulfate (solution concentration 2.4×10 -4 g / ml, accounting for 0.04‰ of total monomer mass), 1.0ml sodium bisulfite (solution concentration 7.2×10 - 4 g / ml, accounting...
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