Patent ID: 7045110
Filing Date: 2006-05-16
Classification: C01B,C01D

Abstract:
1. A batch process for co-producing anhydrous hydrogen bromide and a purified bisulfate salt comprising: (a) charging a batch reactor with a bromide salt slurry, wherein the slurry is more than 50% by weight bromide salt; (b) adding hydrogen bromide to the reactor; (c) reacting the slurry with sulfuric acid in a batch reaction wherein bromide salt is consumed to produce crude aqueous hydrogen bromide and crude bisulfate salt, the crude bisulfate salt containing bromide; (d) purifying the crude hydrogen bromide by distillation to produce anhydrous hydrogen bromide; and (e) removing bromide from the crude bisulfate salt to form a purified bisulfate salt, wherein at least a portion of the hydrogen bromide that is added to the reactor is a product, or derived from a product, of: (i) the distillation of the crude hydrogen bromide; (ii) the purification of the crude bisulfate salt; (iii) or combinations thereof.