ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

A cyclic preparation of thiosulfate and formation of polythio acids

F. Hanic

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)