Chlorine is the eleventh most abundant element in the lithosphere. It is highly reactive and hence rarely found in the free state. It exists mainly in the form of chlorides. In seawater it is present as 2.9 wt% NaCl and 0.3 wt% MgCl2. In salt deposits formed by evaporation of seawater, chlorine is present in large quantities as rock salt (NaCl) and Sylrite (KCl), together with bischofite (MgCl2 . 6 H2O), Carnallite (KCl MgCl2 . 6 H2O), Tachhydrite (CaCl2 . 2MgCl2 . 12 H2O) and others. Occasionally it is also found as heavy metal chlorides, usually in the form of double salts such as atacamite (CuCl2 .3Cu(OH)2). Plants and animals always contain chlorine in the form of chlorides or free HCl.

Introduction

Properties&uses

Methods of Production

Material Balance

Energy Balance

Design of Equipments

Pollution control&Safety

Cost Estimation&Economics

Plant Location&Layout

Bibliography