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Citation: SHEN Xianghua, YIN Xiaoshuang, YANG Wenzhong. Synergistic Effects of Organic Phosphorous and Polymer Additives on Sodium(Potassium) Fluosilicate Inhibition[J]. Chinese Journal of Applied Chemistry, ;2014, 31(6): 732-736. doi: 10.3724/SP.J.1095.2014.30360 shu

Synergistic Effects of Organic Phosphorous and Polymer Additives on Sodium(Potassium) Fluosilicate Inhibition

1.
School of Science, Nanjing University of Technology, Nanjing 211816, China

Corresponding author: YIN Xiaoshuang,
Received Date: 18 July 2013
Available Online: 5 September 2013
Fund Project: 国家科技重大专项课题基金资助项目(2013ZX07210001) (2013ZX07210001)

Effects of 2-phosphonobutane-1,2,4-tricarboxylic acid(PBTCA) and N-(2-hydroxypropyl) methacrylamide(HPMA) inhibitors on the sodium(potassium) fluorosilicate crystallization were studied by turbidity and static methods.Mechanism of inhibition was explained according to classic nucleation theory.Morphology and crystal form of sodium(potassium) fluorosilicate were characterized by SEM and XRD.The results show that PBTCA and HPMA can inhibit crystallization precipitation by improving the surface free energy of sodium(potassium) fluorosilicate.The mixture of PBTCA and HPMA has distinct synergy,which can improve surface free energy of Na₂SiF₆ from 108 mJ/m² to 126 mJ/m²,inhibition rate of Na⁺ from 6.2% to 70.3%,surface free energy of K₂SiF₆ from 199 mJ/m² to 230 mJ/m² and inhibition rate of K⁺ from 10.2% to 45.3%,respectively.Particles of sodium(potassium) fluorosilicate are dispersed and diminished in the presence of PBTCA and HPMA.The crystal form is mainly NaKSiF₆ in the blank solution,while they are mainly Na₂SiF₆ and K₂SiF₆ in the presence of PBTCA and HPMA.
- sodium(potassium) fluorosilicate,
- scale inhibition,
- surface free energy,
- induction period
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