Dispersible flocculant, preparation method and application thereof
A flocculant and dispersive technology, applied in the field of dispersive flocculant and its preparation, can solve the problems of reducing the apparent viscosity of the dispersion system and forming gel, so as to improve the solubility and relative molecular weight, and reduce the excessive heat of reaction , Reduce the effect of cross-linking phenomenon
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Embodiment 1
[0033] 1. Using the water dispersion polymerization method, add acrylamide (AM) monomer and dimethyl diallyl ammonium chloride (DMDAAC ) monomer, polydimethyldiallylammonium chloride (PDMDAAC) as a dispersant, inorganic salt (NH 4 ) 2 SO 4 and NaCl, make it dissolve completely with deionized water, and ensure that the mass percentage of AM monomer and DMDAAC monomer in the final reaction system is 18%, and n(DMDAAC):n(AM)=15: 85 (mol / mol) (i.e. the ratio of the amount of substance of DMDAAC monomer and AM monomer is 15:85); The mass percentage that dispersant PDMDAAC accounts for the sum of AM monomer and DMDAAC monomer is 3.5%; (NH 4 ) 2 SO 4 The mass percentage in the final reaction system is 20%; the mass percentage of NaCl in the final reaction system is 0.5%, the resulting solution is placed in a 55°C constant temperature water bath and stirred, and the pH value of the reaction system is adjusted to be equal to 6 , after 20 minutes of deoxygenation by nitrogen gas, t...
Embodiment 2
[0038] Except changing the mass percent of AM monomer and DMDAAC monomer and in the final reaction system is 15%, repeat the step of embodiment 1, the relative molecular mass that obtains the CPAM polymkeric substance in the CPAM dispersion is 1.29 * 10 7 , the apparent viscosity of the system is 318.19mPa·s.
Embodiment 3
[0040] In addition to changing n(DMDAAC):n(AM)=20:80 (mol / mol) in the reaction system (i.e. the ratio of the amount of substance of DMDAAC monomer and AM monomer is 20:80), repeat the process of Example 1 step, the result is that the relative molecular mass of the CPAM polymer in the CPAM dispersion is 1.31×10 7 , the apparent viscosity of the system is 325.5mPa·s.
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