Recycle of HBr to bromine is highly desirable both from an economic and an environmental standpoint. Catalytic oxidation offers the potential to recycle HBr from contaminated waste streams to bromine. This chapter illustrates that the oxidation catalyst is stable against deactivation by a wide range of contaminants found in waste HBr streams. Strategies to deal with the contaminants will depend on the recycle applications in which the catalytic oxidation unit serves. In the case of HCl-contaminated feeds, it is expected that the most economical operating mode will achieve less than complete HBr conversion. This will yield bromine that is essentially free of chlorine contamination and eliminate the need to purify the bromine by distillation. The process effluent stream will then be a mixed HCI-HBr stream, where the ratio of the two acids depends on the starting HC1 concentration and the actual conversion level chosen. The feasibility of using, selling, or disposing of this stream is site specific. © 1995, Elsevier B.V.
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