ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
A cyclic preparation of thiosulfate and formation of polythio acids
Abstract: To prep. Na2S2O3, a gaseous mixt. of H2S:SO2 (1:0.8) is introduced into a NaOH soln. NaOH decreases the soly. of Na2S2O3 only slightly. By adding NaOH soln. to a satd. soln. of Na2S2O3, and changing the NaOH into Na2S2O3 with the H2S-SO2 mixt., a supersaturated soln. of Na2S2O3 forms, and Na2S2O3 ppts. The concn. of Na2S2O3 can be chosen so that a satd. soln. forms at higher temp. Upon cooling Na2S2O3.5H2O crystallizes. The resulting satd. soln. is used to dissolve more NaOH.
Full paper in Portable Document Format: 69-10a547.pdf (in Slovak)
Chemical Papers 6 (9-10) 547–560 (1952)