In:
Recueil des Travaux Chimiques des Pays-Bas, Wiley, Vol. 73, No. 4 ( 1954-01), p. 287-324
Abstract:
Some physico‐chemical properties of the system HNO 3 ‐SO 3 are described. From the melting point curve the existence of some crystalline compounds could be derived. The very stable compound HNO 3 . 2SO 3 was isolated (m.p. 112° C), a compound ‐ possibly 2HNO. 3SO 3 ‐ was found (m.p. 106° C), and a compound HNO 3 . 3SO 3 could be isolated (m.p. 41° C). Liquid HNO 3 and SO 3 are not completely miscible. Between 90% SO 3 and nearly 100% SO 3 there exists a miscibility gap. The vapour pressure diagram of the system HNO 3 ‐SO 3 was also determined. The minimum in this diagram corresponds to HNO 3 . 2SO 3 . The vapour of mixtures on the HNO 3 side of this minimum contains HNO 3 and N 2 O 5 . On the SO 3 side of the minimum of vapour contains SO 3 . It is posible to absorb most of SO 3 from contact gas in mixtures with 80‐82% of SO 3 at 25° C. In molten HNO 3 . 2SO 3 at 110° C the absorption of contact gas proceeds with a yield of over 90%.
Type of Medium:
Online Resource
ISSN:
0165-0513
,
0165-0513
DOI:
10.1002/recl.19540730404
Language:
English
Publisher:
Wiley
Publication Date:
1954
Bookmarklink