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CATION-EXCHANGE RESIN [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2016-02-26

English

Subject field(s)
  • Chemical Engineering
  • Water Treatment (Water Supply)
  • Electrochemistry
  • Wastewater Treatment
DEF

A resin that holds and swaps only cations. Cation resins contain hydrogen ions (H+) to remove positively-charged, dissolved ionic contaminants such as calcium, sodium, magnesium and potassium.

CONT

Other important applications of ion exchange are water softening and the demineralization of water. ... In the second [application], all ionic impurities contained in water are removed by exchange for hydrogen and hydroxyl ions during passage of the water successively through cation- and anion-exchange resins in the acid and base form.

French

Domaine(s)
  • Génie chimique
  • Traitement des eaux
  • Électrochimie
  • Traitement des eaux usées
DEF

Résine qui échange uniquement les cations.

CONT

Les échangeurs d'ions [...] [utilisés] dans l'adoucissement des eaux [...] sont maintenant constitués par des résines synthétiques. Ces résines échangeuses de cations et d'anions sont des composés organiques, de structure macro-ionique [...] C'est ainsi qu'une eau naturelle contenant des impuretés ioniques [...] échange, en passant sur ces résines, les ions qu'elle renferme contre des ions H- ou OH- lesquels se combinent en donnant de l'eau; celle-ci se trouve donc purifiée (désionisée).

Spanish

Campo(s) temático(s)
  • Ingenieria química
  • Tratamiento del agua
  • Electroquímica
  • Tratamiento de aguas residuales
DEF

Separa los cationes de una solución, intercambiándolos por iones sodio (ciclo del sodio) o por iones hidrógeno (ciclo del hidrógeno).

CONT

La resina de intercambio catiónico se regenera con un ácido fuerte tal como el sulfúrico o el clorhídrico.

CONT

Las resinas de intercambio catiónico en el ciclo hidrógeno son de ácidos débiles o fuertes. La mayoría de las resinas ácidas empleadas en el tratamiento de la contaminación del agua son resinas con ácidos fuertes.

Save record 1

Record 2 2011-05-31

English

Subject field(s)
  • Analytical Chemistry
  • Biotechnology
DEF

An exchanger containing cations which are exchangeable for other cations present in the solution.

OBS

The term cation-exchanger resin may be used in the case of solid organic polymers.

OBS

The early cation exchangers were naturally occurring zeolites but these have been almost completely superseded by the synthetic organic ion exchangers. The synthetic cation exchangers are classified into two main groups, the weak cation exchangers and the strong cation exchanger. In the former the main functional groups are carboxylic acid groups and in the latter they are sulphonic acid groups.

French

Domaine(s)
  • Chimie analytique
  • Biotechnologie
DEF

Échangeur d'ions dont les contre-ions sont des cations.

OBS

L'expression résine échangeuse de cations peut être utilisée dans le cas de polymères organiques solides.

Spanish

Campo(s) temático(s)
  • Química analítica
  • Biotecnología
Save record 2

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