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

Sulfite cooking of viscose cellulose. VII. The influence of formic acid on the decomposition of cooking acid at higher temperatures

I. Slávik

Slovak Academy of Sciences, Bratislava

Abstract: cf. C.A. 53, 9657a. In sulfite cooking the effect of HCOOH on SO₂ solns. at higher temp. under pressure was studied. HCO₂H reduces SO₂ with the formation of thiosulfates and elementary S and is oxidized to CO₂. The decompn. of SO₂ by HCO₂H is more rapid in solns. buffered with NaOH. The detrimental effect of HCO2H is explained if present in the cooking acid before cooking. Under certain conditions HCO₂H as a reducing agent accelerates sulfite cooking.

Full paper in Portable Document Format: 131a47.pdf (in Slovak)

Chemical Papers 13 (1) 47–50 (1959)