|  | C |
SECTION C — CHEMISTRY AND METALLURGY

CHEMISTRY

|  | C02 |
TREATMENT WATER, WASTE WATER AND SEWAGE (distilling, filtering, separating Fulltext... Hierarchy... Expanded...B01)

|  | C02B |
TREATMENT OF WATER, e.g. PURIFICATION (adding materials to water to prevent corrosion of metals Fulltext... Hierarchy... Expanded...C23F)

|  | C02B 1/00 |
Purifying water; Devices therefor (Fulltext... Hierarchy... Expanded...C02B 3/00 takes precedence; separating suspended particles from water Fulltext... Hierarchy... Expanded...B01D; devices for feeding reagents for the treatment of water Fulltext... Hierarchy... Expanded...B01J 4/00)

|  | C02B 1/02 |
· | by heating

|  | C02B 1/04 |
· · | Distillation (in general Fulltext... Hierarchy... Expanded...B01D 3/00)

|  | C02B 1/06 |
· · · | specially adapted for sea water (Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...B01D)

|  | C02B 1/16 |
· · | using ion-exchange material

|  | C02B 1/18 |
· | by chemical means

|  | C02B 1/20 |
· · | Flocculation or precipitation of suspended impurities

|  | C02B 1/22 - C02B 1/32 |
Note(s) Group Fulltext... Hierarchy... Expanded...C02B 1/40 takes precedence over Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C02B 1/22-C02B 1/32.

|  | C02B 1/22 |
· · | Softening

|  | C02B 1/23 |
· · | Removal of specific dissolved compounds [2]

|  | C02B 1/24 |
· · · | silicon compounds

|  | C02B 1/26 |
· · · | 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 (Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...B01D, Fulltext... Hierarchy... Expanded...B01K, Fulltext... Hierarchy... Expanded...C25)

|  | 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 |
Preventing scale; Adding scale preventives or scale removers to water, e.g. adding sequestering agents (inhibiting incrustation in apparatus for heating liquids for physical or chemical purposes Fulltext... Hierarchy... Expanded...C23F 14/00)

|  | C02B 5/02 |
· | by using inorganic compounds

|  | C02B 5/04 |
· · | condensed phosphates

|  | C02B 5/06 |
· | by using organic compounds

|  | C02B 7/00 |
Physiological amelioration of potable water by specific additives, e.g. trace elements (medicinal water Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...E02B 15/04)