C
CHEMISTRY; METALLURGY
C
CHEMISTRY; METALLURGY
C01
INORGANIC CHEMISTRY
C01
INORGANIC CHEMISTRY
C01B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF;; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
C01B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF;; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
C01B13/00
Oxygen; Ozone; Oxides or hydroxides in general
C01B13/00
Oxygen; Ozone; Oxides or hydroxides in general
C01B13/02
Preparation of oxygen
C01B13/02
Preparation of oxygen
C01B13/0229
Purification or separation processes
C01B13/0229
Purification or separation processes
C01B13/0248
Physical processing only
C01B13/0248
Physical processing only
C01B13/0259
by adsorption on solids
C01B13/0259
by adsorption on solids