FIELD: equipment cleaning operations. SUBSTANCE: inside walls are treated by oxidative reagent: chlorine trifluoride-nitrogen mixture (1:99 to 10: 90) which is then removed while drainage gases are absorbed by saturated calcium oxalate solution in 3-5% hydrochloric acid. EFFECT: improved environmental condition.
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Authors
Dates
1998-07-20—Published
1993-06-24—Filed