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HEXAMETAPHOSPHATE [8 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2003-02-06

English

Subject field(s)
  • Chemical Elements and Compounds
DEF

A phosphate regarded as being a salt of hexametaphosphoric acid, (HPO3)6; ...

OBS

Used loosely to designate a glassy, water-soluble sodium salt (also known as Graham’s salt) having an approximate empirical formula Na2O·P2O5 and used industrially to soften water.

CONT

The polymetaphosphates have a cyclic structure.... The best-known members are : trimetaphosphate... and hexametaphosphate...

CONT

Continuous treatment of water with hexametaphosphate at the rate of 4 to 5g/m³ makes it possible to remove this type of scale from hot water systems.

French

Domaine(s)
  • Éléments et composés chimiques
DEF

Nom générique des sels et éthers-sels de l'acide hexamétaphosphorique.

CONT

Les polymétaphosphates ont une structure cyclique [...]. Les termes les plus connus sont : le trimétaphosphate [...] et l'hexamétaphosphate [...]

CONT

Le traitement continu de l'eau à l'hexamétaphosphate à la dose de 4 à 5 g/m³ permet de détacher [le] tartre des circuits d'eau chaude.

CONT

hexamétaphosphate de sodium Na6(PO3)6·10H2O

Spanish

Save record 1

Record 2 1999-08-25

English

Subject field(s)
  • Chemical Elements and Compounds
  • Food Additives
  • Water Treatment (Water Supply)
DEF

A sodium salt widely used in the food industry (juices, ice cream, cereals, etc.) as a water softener, emulsifying and sequestering agent, etc. Also used in pharmacy (dentifrices).

French

Domaine(s)
  • Éléments et composés chimiques
  • Additifs alimentaires
  • Traitement des eaux
DEF

Sel sodique très employé en alimentation (jus, crème glacée, céréales, etc.) en tant qu'adoucisseur d'eau, émulsifiant, chélateur, etc.

OBS

L'industrie pharmaceutique en fait également usage (dentifrices).

Spanish

Save record 2

Record 3 1998-12-17

English

Subject field(s)
  • Chemical Elements and Compounds
  • Water Treatment (Water Supply)
  • Dyes and Pigments (Industries)
  • Textiles: Preparation and Processing
DEF

Trademark for a sodium phosphate glass cleaner(commonly called sodium hexametaphosphate).

OBS

Derivation: From food-grade phosphoric acid and commercial soda ash by a thermal process. Forms: Powder, agglomerated particles, and broken glassy plates, either pure or adjusted with mild alkalies. ... Use: Softening water without precipitate formation, as in dyeing, laundering, textile processing, and washing operations; corrosion inhibitor in de-icing salt preparations; frozen desserts; pretanning hides in the manufacture of leather, dispersing clays and pigments; threshold treatment for scale; and corrosion prevention.

French

Domaine(s)
  • Éléments et composés chimiques
  • Traitement des eaux
  • Teintures et pigments (Industries)
  • Apprêt et traitements divers (Textiles)
DEF

Type de phosphate de sodium souvent appelé «hexamétaphosphate de sodium», contenant au minimum 65 % de pentoxyde de phosphore P2O5 et de rapport moléculaire oxyde de sodium/pentoxyde de phosphore égal à 1,1.

OBS

Le Calgon est préparé à partir d'acide phosphorique pur et de carbonate de sodium en opérant par voie sèche. [...] il possède des propriétés séquestrantes, dispersantes et défloculantes. En très faible concentration, il ralentit la corrosion de l'acier et empêche la précipitation de composés capables de former du tartre [...] Le Calgon est utilisé pour le blanchissage et le traitement des tissus, pour l'adoucissement de l'eau, notamment en vue d'éviter la formation de tartre, ou comme agent dispersant des argiles et des pigments.

Spanish

Save record 3

Record 4 1994-01-31

English

Subject field(s)
  • Photography
CONT

There are also one or two substances [...] which [...] help give clean negatives. These include water softeners like Calgon(sodium hexametaphosphate) [...] Calgon prevents the formation of a precipitate in a developer solution.

French

Domaine(s)
  • Photographie
CONT

Le plus utilisé est l'hexamétaphosphate de sodium (ou calgon), qui [...] empêche la précipitation des sels de calcium qui se déposent sur l'émulsion.

Spanish

Save record 4

Record 5 1986-06-04

English

Subject field(s)
  • Water Treatment (Water Supply)
DEF

The prevention of the deposition of calcium carbonate in water, after softening treatment, by the addition of a small quantity of sodium hexametaphosphate.

French

Domaine(s)
  • Traitement des eaux
DEF

Emploi de l'hexamétaphosphate de sodium, ou de produits analogues, en très faible quantité, pour prévenir la formation du tartre.

Spanish

Save record 5

Record 6 1981-01-26

English

Subject field(s)
  • Chemical Elements and Compounds
CONT

The polymetaphosphates have a cyclic structure and correspond to... The best-known members are : trimetaphosphate... and hexametaphosphate...

French

Domaine(s)
  • Éléments et composés chimiques
CONT

Les polymétaphosphates ont une structure cyclique [...] Les termes les plus connus sont: le trimétaphosphate [...] et l'hexamétaphosphate [...]

Spanish

Save record 6

Record 7 1981-01-26

English

Subject field(s)
  • Pipes and Fittings
  • Water Treatment (Water Supply)
CONT

The sodium alkalinity of the sodium hypochlorite precipitates the hardness of the dilution water in preparation tanks; it can result in the furring of pipes and feeding equipment. This can be remedied... by placing in the tank on the occasion of each filling approximately 50g of hexametaphosphate of sodium to 100 litres of water.

French

Domaine(s)
  • Tuyauterie et raccords
  • Traitement des eaux
CONT

L'alcalinité sodique de l'hypochlorite de sodium précipite la dureté de l'eau de dilution dans les bacs de préparation; il peut en résulter un entartrage des canalisations et des doseurs. On y remédie [...] en introduisant dans le bac avant chaque remplissage environ 50g d'hexamétaphosphate de sodium pour 100 litres d'eau.

Spanish

Save record 7

Record 8 1975-03-11

English

Subject field(s)
  • Photography
  • Chemistry
OBS

proprietary name for sodium hexametaphosphate. It is to soften hard water.

French

Domaine(s)
  • Photographie
  • Chimie
OBS

(hexamétaphosphate de sodium). Permet l'utilisation des eaux calcaires sans qu'il soit nécessaire de les faire bouillir.

Spanish

Save record 8

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