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BOROHYDRIDE [6 records]

Record 1 2011-09-29

English

Subject field(s)
  • Medical and Surgical Equipment
  • Bioengineering
  • Blood
OBS

Term(s) taken from a Canadian laboratory-equipment company's catalogue.

French

Domaine(s)
  • Équipement médico-chirurgical
  • Technique biologique
  • Sang
OBS

Terme(s) tiré(s) du catalogue d'une compagnie canadienne d'équipement de laboratoire.

Spanish

Save record 1

Record 2 2011-03-21

English

Subject field(s)
  • Chemical Elements and Compounds
  • Pulp Preparation (papermaking)
  • Plastics Manufacturing
Universal entry(ies)
NaBH4
formula, see observation
BH4Na
formula, see observation
CONT

sodium borohydride. Properties: White crystalline powder; soluble in water, ammonia, amines, pyridine, and dimethyl ether of diethylene glycol; insoluble in other ethers, hydrocarbons and alkyl chlorides. ... Derivation: By reaction of sodium hydride and trimethyl borate at 250°C ... Uses: Source of hydrogen and other borohydrides. Reduces aldehydes, ketones and acid chlorides; bleaching wood pulp; blowing agent for plastics; precipitation of mercury from waste effluent (by reduction); decolorizer for plasticizers ...

OBS

Chemical formula: NaBH4 or BH4Na

Key term(s)
  • sodium borohydride salts

French

Domaine(s)
  • Éléments et composés chimiques
  • Préparation de la pâte à papier
  • Plasturgie
Entrée(s) universelle(s)
NaBH4
formula, see observation
BH4Na
formula, see observation
CONT

Blanchiment réducteur. Ce projet explore les pouvoirs de blanchiment et d'inhibition de la réversion de blancheur d'agents réducteurs dérivés du bore. Le borohydrure de sodium (NaBH4) est un agent réducteur connu, mais son coût est trop élevé pour qu'il soit utilisé dans l'industrie des pâtes et papiers.

OBS

Formule chimique : NaBH4 ou BH4Na

Spanish

Save record 2

Record 3 1998-08-12

English

Subject field(s)
  • Chemical Elements and Compounds
  • Pulp Preparation (papermaking)
DEF

A lignin-preserving, powerful bleaching agent which brightens pulp by reducing carbonyl groups, thereby increasing the brightness stability.

OBS

Its high cost makes commercial application prohibitive. However, it is widely used for on-site manufacture of sodium hydrosulphite.

OBS

Can be sodium borohydride or potassium borohydride.

French

Domaine(s)
  • Éléments et composés chimiques
  • Préparation de la pâte à papier
DEF

Agent de blanchiment puissant qui blanchit la pâte en réduisant les carbonyles tout en protégeant la lignine. Il permet de stabiliser la blancheur.

OBS

Son coût élevé a rendu son utilisation commerciale inabordable. Il demeure très utilisé dans la fabrication en usine de l'hydrosulfite de sodium.

Spanish

Save record 3

Record 4 1987-12-17

English

Subject field(s)
  • Chemistry

French

Domaine(s)
  • Chimie

Spanish

Save record 4

Record 5 1986-02-01

English

Subject field(s)
  • Chemistry

French

Domaine(s)
  • Chimie

Spanish

Save record 5

Record 6 1986-02-01

English

Subject field(s)
  • Chemistry

French

Domaine(s)
  • Chimie

Spanish

Save record 6

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