Treatment of hydrochloric acid with magnesium-aluminum oxide at ambient temperatures

被引：40

作者：

Kameda, Tomohito ^{[1
]}

Yoshioka, Toshiaki ^{[1
]}

Hoshi, Tatsunosuke ^{[1
]}

Uchida, Miho ^{[1
]}

Okuwaki, Akitsugu ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Engn, Dept Appl Chem, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2006年 / 51卷 / 03期

关键词：

hydrochloric acid; hydrotalcite-like compound; magnesium-aluminum oxide; neutralization; ordinary temperature; removal of chloride;

D O I：

10.1016/j.seppur.2006.02.008

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Our results demonstrate that magnesium-aluminum oxide (Mg-Al oxide) can be advantageous in treating hydrochloric acid waste at temperatures between 10 and 30 degrees C, by acting as both a neutralizer and fixative for Cl-. The Mg-Al oxide was prepared by the thermal decomposition of a hydrotalcite-like compound. The extent of Cl- removal by Mg-Al oxide increased with increases of temperature, oxide quantity and Mg/Al molar ratio. The initial pH had little effect on Cl- removal; the pH increased rapidly from the start of the reaction and attained a nearly constant value. The reaction involved in Cl- removal from HCl by Mg-Al oxide proceeded under surface chemical reaction control, with apparent activation energy of 65.6 kJ mol(-1). (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：272 / 276

页数：5

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