C
SECTION C — CHEMISTRY AND METALLURGY
  
CHEMISTRY
 C02
TREATMENT OF WATER, WASTE WATER AND SEWAGE (distilling, filtering, separating B01)
 C02B
TREATMENT OF WATER, e.g. PURIFICATION (adding materials to water to prevent corrosion of metals C23F)
 C02B 1/00
Purifying water; Devices therefor (C02B 3/00 takes precedence; separating suspended particles from water B01D; mechanical purification of boiler feed water F22D; devices for feeding reagents for the treatment of water B01J 4/00)
 C02B 1/02
·  by heating
 C02B 1/04
·  ·  Distillation (in general B01D 3/00)
 C02B 1/06
·  ·  ·  specially adapted for sea water (C02B 1/08 takes precedence)
 C02B 1/08
·  ·  ·  portable apparatus
 C02B 1/10
·  by de-gassing
 C02B 1/12
·  by freezing
 C02B 1/14
·  by adsorption (adsorption in general B01D)
 C02B 1/16
·  ·  using ion-exchange material
 C02B 1/18
·  by chemical means
 C02B 1/20 - 
C02B 1/40

Note(s)

Group C02B 1/40 takes precedence over C02B 1/22-C02B 1/32.

 C02B 1/20
·  ·  Flocculation or precipitation of suspended impurities
 C02B 1/22
·  ·  Softening
 C02B 1/24
·  ·  Removal of dissolved silicon compounds
 C02B 1/26
·  ·  Removal of dissolved iron or manganese compounds
 C02B 1/28
·  ·  ·  by oxidation with air
 C02B 1/30
·  ·  Neutralisation of acids
 C02B 1/32
·  ·  Removal of dissolved radioactive materials
 C02B 1/34
·  ·  Oxidation (C02B 1/28 takes precedence)
 C02B 1/36
·  ·  ·  Adding halogens or compounds of halogens
 C02B 1/38
·  ·  ·  with ozone
 C02B 1/40
·  ·  by ion-exchange (ion exchange in general B01J 1/04)
 C02B 1/42
·  ·  ·  by cation exchange
 C02B 1/44
·  ·  ·  ·  using inorganic exchangers
 C02B 1/46
·  ·  ·  ·  using organic exchangers
 C02B 1/48
·  ·  ·  ·  ·  using alkali metal salts of organic exchangers in general
 C02B 1/50
·  ·  ·  ·  ·  using sulphonated compounds
 C02B 1/52
·  ·  ·  ·  ·  using compounds containing carboxylic or phenolic groups
 C02B 1/54
·  ·  ·  ·  ·  using compounds containing phosphorus
 C02B 1/56
·  ·  ·  by anion exchange
 C02B 1/58
·  ·  ·  ·  using inorganic exchangers
 C02B 1/60
·  ·  ·  ·  using organic exchangers
 C02B 1/62
·  ·  ·  ·  ·  in acid halide-form
 C02B 1/64
·  ·  ·  Batch processes
 C02B 1/66
·  ·  ·  Column processes
 C02B 1/68
·  ·  ·  Multi-bed processes
 C02B 1/70
·  ·  ·  Mixed-bed processes
 C02B 1/72
·  ·  ·  Processes with moving ion-exchange material
 C02B 1/74
·  ·  ·  using ion-exchanging material in the form of sheets, e.g. membranes
 C02B 1/76
·  ·  ·  Regeneration of the exchangers
 C02B 1/78
·  by treatment with vibrations
 C02B 1/80
·  ·  with mechanical oscillations, e.g. ultrasonic vibrations
 C02B 1/82
·  by electrolysis, electro-osmosis, dialysis, or electrodialysis (of liquids in general B01D, B01K)
 C02B 3/00
Sterilisation of water
 C02B 3/02
·  Physical treatment
 C02B 3/04
·  ·  Heat treatment
 C02B 3/06
·  Chemical treatment
 C02B 3/08
·  ·  Oxidation
 C02B 3/10
·  ·  Oligodynamic treatment
 C02B 5/00
Adding scale preventives or scale removers to water, e.g. adding sequestration agents (inhibiting incrustation in apparatus for heating liquids for physical or chemical purposes C23F 14/00)
 C02B 5/02
·  inorganic
 C02B 5/04
·  ·  condensed phosphates
 C02B 5/06
·  organic
 C02B 7/00
Physiological amelioration of potable water by specific additives, e.g. trace elements (medicinal water A61K)
 C02B 9/00
Other treatments of water
 C02B 9/02
·  Non-mechanical aspects of treatment of stretches of water to remove oil pollution (mechanically E02B 15/04)