CPC Subgroup
C01B 17/76 by contact processes
Full Title
Sulfur; Compounds thereof > Sulfur trioxide; Sulfuric acid > Preparation > by contact processes
6 direct subcodes
Child Classifications
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- C01B 17/765 Multi-stage SO3-conversion
- C01B 17/77 Fluidised-bed processes
- C01B 17/775 Liquid phase contacting processes or wet catalysis processes
- C01B 17/78 characterised by the catalyst used
- C01B 17/80 Apparatus