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

Sulfite cooking of viscose cellulose. VIII. Dependence of the decomposing cooking acid on the shape of the vessel

I. Slávik

Slovak Academy of Sciences, Bratislava

Abstract: SO₂ solns. (2.40 to 4.42%) with 10 g. glucose/l. and 8 g. NaOH/l., or without these addns., were heated up to 150° for 3.5 hrs. in glass test tubes of 2-cm. diam., opened or closed by fusion and in beakers of 11-cm. diam. In narrow tubes, less of SO₂ was decompd., and less of H₂SO₄, thiosulfates, and elementary S was formed than in larger beakers. After cooling in closed tubes, the thiosulfates present remained unchanged, while in the open tubes and beakers they decompd. with the formation of the equiv. amt. of elementary S. A chain reaction during the decompn. of SO₂ at higher temp. causes a greater deactivation of free radicals on the walls of narrow than on the walls of large vessels.

Full paper in Portable Document Format: 133a186.pdf (in Slovak)

Chemical Papers 13 (3) 186–192 (1959)