Lei Jun-feng
2006
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Journal
Environmental Science & Technology
Abstract
The content and ingredient as well as origins of impurity in bromoethane made from dregs of bromine at a pharmaceutical manufacturer was analysed through GC and GC-MS. The best technical condition of reclaiming sodium bromide was determined by measuring solubility of sodium bromide and sodium carbonate in ethanol of various temperature and concentration. Experiment results showed that dregs of bromine was dissolved by 60% ethanol at 50℃ twice, with first recovery rate of sodium bromide up to 98.0% and that of second 99.0%. The reclaimed sodium bromide was used to prepare bromoethane, with purity up to 98.0% and efficiency of reclaiming 79.6% when the proportion of sodium bromide, water, ethanol and vitriol was 1:5.00:1.30:2.13, which can satisfy the industrialized production.