IPC Subgroup
C01B 17/765 Multi-stage SO-conversion
Introduced: January 1980
Last revised: January 2006
Full Title
Sulfur; Compounds thereof > Sulfur trioxide; Sulfuric acid > Preparation > by contact processes > Multi-stage SO-conversion
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- INORGANIC CHEMISTRY
- Subclass:
- NON-METALLIC ELEMENTS; COMPOUNDS THEREOF