ISSN:
0009-286X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Regeneration of spent sulphuric acid. Several processes are available for the regeneration of spent sulphuric acid. Generally, the dilute acids containing at least 20% of H2SO4 are preconcentrated to 60 - 70% and then either further concentrated to over 90% or decomposed to SO2. Purifying operations can be combined with these steps. Spent sulphuric acid highly contaminated with inorganic and organic compounds can frequently only be regenerated after a prior purification step, e. g. by extraction of electrolysis. Dilute spent sulphuric acid containing less than 20% of H2SO4 can also be regenerated, but the costs incurred by evaporation increase out of proportion with decreasing sulphuric acid concentration.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cite.330500106
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