Mechanism and kinetics study on removal of Iron from phosphoric acid by cation exchange resin

Xinke Leng; Yanjun Zhong; Dehua Xu; Xinlong Wang; Lin Yang

doi:10.1016/j.cjche.2018.09.012

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Mechanism and kinetics study on removal of Iron from phosphoric acid by cation exchange resin

Separation Science and Engineering | Updated：2026-01-06

- Mechanism and kinetics study on removal of Iron from phosphoric acid by cation exchange resin
- Chinese Journal of Chemical Engineering Vol. 27, Issue 5, Pages: 1050-1057(2019)
- Affiliations：
  
  School of Chemical Engineering, Sichuan University,Chengdu,China,610065
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2018.09.012
  CLC：
- Published：2019
- Accepted：
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Xinke Leng, Yanjun Zhong, Dehua Xu, Xinlong Wang, Lin Yang. Mechanism and kinetics study on removal of Iron from phosphoric acid by cation exchange resin[J]. Chinese Journal of Chemical Engineering, 2019, 27(5): 1050-1057.
DOI：

Xinke Leng, Yanjun Zhong, Dehua Xu, Xinlong Wang, Lin Yang. Mechanism and kinetics study on removal of Iron from phosphoric acid by cation exchange resin[J]. Chinese Journal of Chemical Engineering, 2019, 27(5): 1050-1057. DOI： 10.1016/j.cjche.2018.09.012.

摘要

Abstract

Iron element is one of the main impurities in wet-process phosphoric acid and it has a significant impact on the subsequent phosphorus chemical products. This paper studied the feasibility of using Sinco-430 cation exchange resin for iron removal from phosphoric acid. The specific surface area and the total exchange capacity of resin were 8.91 m

·g

-1

and 5.18 mmol·g

-1

respectively. The sorption mechanism was determined by FTIR and XPS and the results indicated that iron was combined with—SO

H in resin. The removal process was studied as a function of temperature

content and mass ratio between resin and solution. The unit mass of resin to remove iron was 0.058 g·g

-1

resin when the operating parameters were

=50℃

content=27.61 wt% and

S/L

=0.1

respectively. Kinetics study demonstrated that pseudo-second-order reaction model fits this study best and the calculated activation energy of overall reaction is 29.10 kJ·mol

-1

. The overall reaction process was mainly controlled by pore diffusion.

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