CPC Subgroup
C01B 17/50 Preparation of sulfur dioxide
Full Title
Sulfur; Compounds thereof > Sulfur dioxide; Sulfurous acid > Preparation of sulfur dioxide
7 direct subcodes
Child Classifications
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- C01B 17/52 by roasting sulfides (preliminary treatment of ores or scrap C22B1/00)
- C01B 17/54 by burning elemental sulfur
- C01B 17/56 Separation; Purification
- C01B 17/58 Recovery of sulfur dioxide from acid tar or the like
- C01B 17/60 Isolation of sulfur dioxide from gases