Modeling of the dissolution of calcium hydroxyde in the preparation of hydroxyapatite by neutralization

被引：42

作者：

Bernard, L

Freche, M

Lacout, JL

Biscans, B

机构：

[1] ENSIGC, INPT, UPS, CNRS,UMR 5503,Lab Genie Chim, F-31078 Toulouse 4, France

[2] ENSCT, INPT, UPRESA 5071, Lab Mat, F-31400 Toulouse, France

来源：

CHEMICAL ENGINEERING SCIENCE | 2000年 / 55卷 / 23期

关键词：

dissolution; kinetics; calcium hydroxide; dynamics; model;

D O I：

10.1016/S0009-2509(00)00205-0

中图分类号：

TQ [化学工业];

学科分类号：

0817 [化学工程与技术];

摘要：

In order to control the properties of hydroxyapatite particles, the method based on neutralization of a suspension of lime with orthophosphoric acid is studied. The dissolution of lime is the first step in the process and is described here. After a preliminary study of the hydrodynamics of the reactor, a kinetic model, based on diffusion theory; was developed. It describes the increase of calcium concentration in a dynamic system. The effects of stirring rate, temperature and acid flow rate on the dissolution of lime were determined experimentally. The acid flow rate influenced the reaction rate the most. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：5683 / 5692

页数：10

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[4]

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