Recovery of Boron from the Clay Waste of Boron Industry by Leaching

被引：2

作者：

Kipcak, Ilker ^{[1
]}

Ozdemir, Mine ^{[1
]}

机构：

[1] Eskisehir Osmangazi Univ, Dept Chem Engn, TR-26480 Meselik, Eskisehir, Turkey

来源：

INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING | 2012年 / 10卷

关键词：

boron recovery; leaching kinetics; sulfuric acid; clay waste; boric acid; BORAX SLUDGE; WATER;

D O I：

10.1515/1542-6580.2468

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this study, the recovery of boron from the clay waste of boron industry by leaching with sulfuric acid solution was studied in a batch reactor and the subsequent production of boric acid (H3BO3) was investigated. The effects of acid concentration, solid-to-liquid ratio and reaction temperature on the leaching process were examined. Experimental studies were carried out in the ranges of 0.1-1.0 M for acid concentration, 1-10 g/120 mL for solid-to-liquid ratio and 25-75 degrees C for reaction temperature. The analysis of the experimental data showed that the kinetics of the leaching process fitted the Avrami model in the form of X = 1 -exp (-k t (n)). For the production of boric acid, the optimum leaching conditions were determined as follows: acid concentration, 0.1 M; solid-to-liquid ratio, 6 g/120 mL; reaction temperature, 50 degrees C and reaction time, 60 min. Finally, boric acid was produced in the purity of more than 95% by crystallization of the leach solution.

引用

页数：15

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