Processing of boric acid from borax by a wet chemical method

被引：45

作者：

Mergen, A ^{[1
]}

Demirhan, MH ^{[1
]}

Bilen, M ^{[1
]}

机构：

[1] Eti Holding AS, Ar Ge Dairesi Baskanligi, Istanbul Yolu Uzeri, Ankara, Turkey

来源：

ADVANCED POWDER TECHNOLOGY | 2003年 / 14卷 / 03期

关键词：

boric acid; borax; crystallization; wet chemical method; rafination;

D O I：

10.1163/15685520360685947

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Boric acid crystals were obtained from borax (Na2B4O7 . 10H(2)O) solutions which were prepared from borax ore. The concentration of borax solutions was varied from 1120 to 1240 kg/m(3) and 1180 kg/m(3) was determined to be the optimum concentration value for boric acid production from a relation between borax solution concentration and boric acid production yield and boric acid purity. Boric acid production yield was around 91% for a borax solution of 1180 kg/m(3). Boric acid purity ranged from 94 to 97% for different concentrations before refining, and a high purity boric acid over 99.6% with low sulfate and sodium was obtained after refining. Boric acid crystals were characterized by X-ray diffraction, differential thermal and thermograrimetric analysis, and scanning electron microscopy observation.

引用

页码：279 / 293

页数：15