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Citation: PENG Xiao-Hong, JIANG Yong-Hua. Synthesis and Flocculation of Amphoteric Polyacrylamide Emulsion Used as Mineral-dressing Agent[J]. Chinese Journal of Applied Chemistry, ;2006, 23(9): 988-991. shu

Synthesis and Flocculation of Amphoteric Polyacrylamide Emulsion Used as Mineral-dressing Agent

PENG Xiao-Hong ^, ,
JIANG Yong-Hua

1.
College of Material Science and Engineering, South China University of Technology, Guangzhou 510640

Corresponding author: PENG Xiao-Hong,
Received Date: 15 September 2005
Available Online: 13 March 2006
Fund Project: 广东省重点科技计划(B40502)资助 (B40502)

Amphoteric polyacrylamide emulsion,which has an intrinsic viscosity up to 26.7 dL/g,was synthesized by inverse emulsion copolymerization,with latex particle size of 0.6~8 μm based on SEM.By means of FTIR measurement,it is demonstrated that the synthesized amphoteric polyacrylamide is composed of chain units of acrylamide(AM),sodium acrylate(NaAA),and acryloyloxyethyl trimethylammonium chloride (DAC).The effects of DAC/NaAA feeding ratio,polymer intrinsic viscosity and dosage on the flocculability of bauxite red mud were studied.The amphoteric polyacrylamide emulsion is quickly dissolved in water,and the flocculating efficiency of it to the bauxite red mud is obvious.When the mass percent of the APPAME was 0.005%,the precipitating time was only 3 min,with the deposited thinkness less than 40%,and the transmittance of fall-off liquid could reach 65%. Synergetic effect of electrostatic interaction and adsorption-bridging action between amphoteric polyacrylamide and slurry particles can further improve flocculating efficiency.
- amphoteric polyacrylamide,
- emulsion mineral-dressing agent,
- bauxite red mud,
- flocculation mechanism
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