Innovative findings about ferrous oxalate dihydrate crystallization in simulated dihydrate phosphoric acid product

被引：1

作者：

Abdel-Ghafar, H. M. ^{[1
]}

Ibrahim, M. A. M. ^{[2
]}

El-Shall, H. ^{[3
,4
]}

Ismail, A. K. ^{[1
]}

机构：

[1] CMRDI, POB 87, Cairo, Egypt

[2] Ain Shams Univ, Fac Sci, Dept Chem, Cairo, Egypt

[3] Cairo Univ, Fac Engn, Giza, Egypt

[4] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

来源：

WATER SCIENCE AND TECHNOLOGY | 2018年 / 77卷 / 12期

关键词：

cetyl pyridinium chloride; crystallization; ferrous oxalate dihydrate; nucleation; phosphoric acid; CALCIUM-SULFATE DIHYDRATE; PURIFICATION; GYPSUM; IRON; NUCLEATION;

D O I：

10.2166/wst.2018.294

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The basic fundamentals of ferrous oxalate dihydrate (FeC2O4.2H(2)O) crystallization including supersaturation, nucleation and crystal growth in simulated dihydrate phosphoric acid product with and without cetyl pyridinium chloride (CPC) additive were studied. Oxalic acid and ferrous sulfate heptahydrate crystals were mixed with dilute phosphoric acid (28% P2O5) at 60 degrees C and the turbidity of the reaction mixture was measured at different time intervals. Induction time of ferrous oxalate dihydrate crystals was calculated at different supersaturation ratios ranging from 2.5 to 6.7. With increasing the supersaturation ratio, the induction time decreased. The nucleation rates are 46.4 x 10(28) nuclei cm(-3)s(-1) and 50.2 x 10(28) nuclei cm(-3)s(-1) at supersaturation ratio 6.7 with and without CPC addition, respectively. The surface energy increases with CPC addition compared to the baseline. In addition, the formed crystals are modified from cubic shape to rod-like shape with increasing CPC dose.

引用

页码：2940 / 2945

页数：6

共 25 条

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