Bromine in Nature available in Sea water in PPM levels.Sea Brine-bittern formed in Salt farms after removal of salts contains Bromine in 2-6 GPL Level. Highest bromine content available in the Dead Sea at Israel and Jorden. Bromine is extracted from salt brines by reactive stripping.
Bromine recovery From Sea bittern
Brief process Description :
Process divides into three steps:
Displacement of Elemental Bromine from Sea Bittern in Oxidation reaction by Chlorine
Steam Stripping of Bromine and condensation
Purification of Bromine to remove chlorine and moisture.
Main Reaction Column is Combined Reactive Stripping Column. First, two steps carried out in the same column. Step 3 –Purification involves separate Distillation Column.
Design of Plant is carried out considering varied Bromine content in feed ad varied flow rates. Due to this design, it is possible to run the plant in different seasons with consistent purity.
Product Quality Specification:
Strictly adheres with Indian Government standard IS 2142
Bromine –Wt%: 99.5%
Chlorine- Wt % > 0.05% -0.08%
Bromine Recovery from Industrial Solutions We Design, Supply and Commissioned the glass Plant for IS Quality Bromine from Industrial Bromide Solution.
Bromine being a highly reactive material finds wide applications in many Chemical Industries like Organic Intermediates, Dyestuffs, Agrochemical, Fire retardants etc for Bromination
The reactions to form the chemicals usually generate hydrogen bromide as a by-product as in the following example :
R – H + Br2 ^ R – Br + HBr
Clearly, no more than half the bromine added ends up in the product – the rest being rejected as hydrogen bromide gas and as dissolved bromides such as Sodium Bromide, Potassium Bromide (often rejected in washing solutions). But bromine is an expensive raw material and economic good sense suggests that it should be recovered. Hydrogen bromide in water and then recover the bromine from this solution as well as from other aqueous waste streams. We can then purify the bromine to give a product (typically better than 99.5% bromine) to re-use in the reactors.
Aqueous Bromide solution is reacted with chlorine gas in reaction or Stripping column. The Chlorine liberates elemental bromine from the dissolved bromide. This is stripped out by the live steam feed from the bottom of the column.
Crude bromine is then distilled to get Bromine purity of minimum 99.5%. The solution is not always so simple though, as feeds are often contaminated with organic material from the process. These organic impurities have to be removed by pre-treatment before feeding to the plant.
Overview of the System
The system consists of Stripping / Reaction Column – Glass Cooling / Chilling Heat Exchangers Phase Separator – Glass Bromine Purification Column Pure Bromine Condenser – Glass Vent / Guard Condenser – Glass Bromine Reboiler – Glass Bromine Product Cooler – Glass
Crude / Pure Bromine Collecting Receiver – Glass