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PCE
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DIFF Subgroup
C01B 17/82

of sulfuric acid using a nitrogen oxide process

Introduced: September 1968

Full Title

Sulfur; Compounds thereof > Sulfur trioxide; Sulfuric acid > Preparation > of sulfuric acid using a nitrogen oxide process

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

Child Classifications

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  • C01B 17/84 Chamber process IPC+CPC Available in IPC and CPC
  • C01B 17/86 Tower process IPC+CPC Available in IPC and CPC