Barium oxalate as a selective solid reagent for the absorption of sulphur trioxide.
Barium and calcium oxalate monohydrates have been shown to be more suitable absorbents for sulphur trioxide than either anhydrous or hydrated oxalic acid. All four compounds are selective absorbents for the trioxide and do not absorb sulphur dioxide. Similarly all are elective absorbents for sulphuric acid aerosol, although the calcium salt may be decarboxylated under these conditions. Lead oxalate and formate may be suitable for the absorption of SO(3) and H(2)S, and SO(3), H(2)S and SO(2) respectively.
Belcher
R
R
Department of Chemistry, University of Birminghan P.O. Box 363, Birmingham, U.K.
Morris
S J
SJ