Sulfo-phosphoric attack of the phosphate ore: energetic contribution of each phenomenon intervening during the attack and effect of the time of addition of the sulfuric acid

被引：0

作者：

Brahim, Khemaies ^{[1
]}

Manai, Maher ^{[1
]}

Soussi-Baatout, Amira ^{[1
]}

Khattech, Ismail ^{[1
]}

机构：

[1] Univ Tunis El Manar, Fac Sci Tunis, Chem Dept, LR15SE01 Mat Crystal Chem & Appl Thermodynam Lab, Tunis 2092, Tunisia

来源：

JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS | 2023年 / 46卷 / 02期

关键词：

Chang; Jo-Shu; Energetic contribution; phosphate ore; addition time; optimal condition; DIFFERENTIAL REACTION CALORIMETER; DISSOLUTION KINETICS; LEACHING KINETICS; FLUORAPATITE; CRYSTALLIZATION; THERMODYNAMICS; PURIFICATION; FILTRATION; DIHYDRATE; GYPSUM;

D O I：

10.1080/02533839.2022.2161940

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The energetic contribution of various phenomena involved in the reaction between the Tunisia phos-phate ore and a mixture of phosphoric and sulfuric acids was studied calorimetrically. The enthalpies of the sulfuric acid ionization (delta Hion), the H2PO4- neutralization (delta H-neut), and the phosphate ore dissolution in phosphoric acid alone (delta H-dPN) or in the mixture of the latter with sulfuric acid (delta H-dSPh) were determined and equal to -58.7 +/- 0.7 kJ mol(-1), 12.7 +/- 1.3 kJ mol(-1)H(2)SO(4), -186.2 +/- 2.2 J g(-1) and - 425.6 +/- 3.3 J g(-1), respectively. The addition time of the sulfuric acid was systematically investigated to reduce the loss of P-2 O-5 in gypsum and the optimal condition for a better yield was deduced.

引用

页码：177 / 186

页数：10

共 45 条

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