IPC Subgroup
C01B 32/33 from distillation residues of coal or petroleum; from petroleum acid sludge
Introduced: January 2017
Full Title
Carbon; Compounds thereof > Active carbon > Preparation > characterised by the starting materials > from distillation residues of coal or petroleum; from petroleum acid sludge
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- INORGANIC CHEMISTRY
- Subclass:
- NON-METALLIC ELEMENTS; COMPOUNDS THEREOF