TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

DISPERSING AGENT [5 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2016-03-07

English

Subject field(s)
  • Mineral Processing (Metallurgy)
  • Processing of Mineral Products
DEF

An agent that prevents fine soil particles or clay particles in suspension from coalescing to form flocs.

OBS

dispersing agent: Reagents added to flotation circuits to prevent flocculation, especially of objectionable colloidal slimes.

Key term(s)
  • deflocculation agent

French

Domaine(s)
  • Minéralurgie (Métallurgie)
  • Préparation des produits miniers
CONT

Agent défloculant. (Les acides ou les bases sont souvent des défloculants, car ils imposent l'apparition de charges sur les grains du colloïde étudié, d'où des répulsions entre grains.)

Spanish

Campo(s) temático(s)
  • Explotación de minerales (Metalurgia)
  • Preparación de los productos mineros
Save record 1

Record 2 2016-02-29

English

Subject field(s)
  • Chemical Engineering
  • Anti-pollution Measures
  • Water Pollution
  • Solvents and Petroleum Spirits
CONT

Oil slick dispersants. When oil ... is treated with a suitable surface active agent and agitation applied, the oil is broken up into particles ... so small that they constitute an oil-in-water emulsion ... Dispersants serve to increase the surface area of an oil spill and disperse oil globules throughout the layer volume water. This causes an accelerated degradation of oil by microbiological action.

OBS

The chemicals used to disperse the oil are emulsifiers. Although a chemist would never confuse the terms dispersant and emulsifier, the former designating a product which encourages the distribution of finely divided solids in a fluid, either liquid or gas, the latter referring to a product which encourages the colloidal dispersion of one liquid in another, the terms are synonymous in the field of oil pollution control. This is explained by the following sentence taken from "The Control of oil pollution on the sea and inland waters", edited by J. Wardley-Smith (source COCOB): "It was found ... [that the product] when sprayed on to the oil, effectively softened and dispersed it by means of emulsification ..." The dispersion is accomplished by products which emulsify the oil, i.e., emulsifiers. Dispersion is used in its general sense and hence dispersant simply means a product that causes spreading. Also dispersant is used more frequently than emulsifier.

French

Domaine(s)
  • Génie chimique
  • Mesures antipollution
  • Pollution de l'eau
  • Solvants et essences spéciales (Pétrole)
DEF

Produit contenant des solvants et des tensioactifs qui, répandu sur une nappe de pétrole en mer, provoque le fractionnement de celle-ci en gouttelettes et facilite sa dispersion.

CONT

Produits émulsifiants ou dispersants. Ces produits [...] sont pratiquement tous des produits chimiques. Leur action [...] consiste à répartir une pollution de surface dans le volume de la mer, sous forme de fines particules. L'on espère, par ce procédé, favoriser l'action des bactéries et accélérer la biodégradation naturelle des hydrocarbures.

Key term(s)
  • agent de dispersion

Spanish

Campo(s) temático(s)
  • Ingenieria química
  • Medidas contra la contaminación
  • Contaminación del agua
  • Solventes y bencinas especiales (Petróleo)
DEF

Agente tensioactivo adicionado a un medio en suspensión para originar la separación uniforme de partículas sólidas muy finas.

Save record 2

Record 3 2011-08-19

English

Subject field(s)
  • Chemistry
  • Paints and Varnishes (Industries)
  • Rubber
DEF

A surface-active agent used to promote uniform and maximum separation of colloidal size solid particles.

OBS

dispersing agent: term standardized by ISO.

French

Domaine(s)
  • Chimie
  • Peintures et vernis (Industries)
  • Caoutchouc
DEF

Substance tensioactive utilisée pour faciliter la dispersion d'ingrédients de mélange solides dans un système aqueux. [Définition normalisée par l'ISO.]

DEF

Produit apte à promouvoir la formation d'une dispersion.

OBS

agent dispersant; dispersant : termes normalisés par l'ISO.

OBS

agent dispersant : terme normalisé par l'AFNOR.

Spanish

Campo(s) temático(s)
  • Química
  • Pinturas y barnices (Industrias)
  • Caucho
DEF

Sustancia que entra en la composición de ciertas pinturas y cuya presencia facilita la dispersión de las partículas sólidas que las mismas contienen en suspensión.

Save record 3

Record 4 2003-10-30

English

Subject field(s)
  • Food Additives
DEF

A substance used to stabilize colloidal suspensions.

OBS

An example in the food industry is dioctyl sodium sulfosuccinate.

French

Domaine(s)
  • Additifs alimentaires
CONT

Un agent dispersant, comme le stéarate d'aluminium, agit rarement sur la tension superficielle du liquide auquel il est ajouté.

Spanish

Campo(s) temático(s)
  • Aditivos alimentarios
Save record 4

Record 5 2003-10-23

English

Subject field(s)
  • Crop Protection
DEF

Any substance, solid or liquid, that, when added to a pesticide, enables it to spread better over the surfaces on which it is deposited.

French

Domaine(s)
  • Protection des végétaux
DEF

[...] adjuvant dans les concentrés émulsionnables et les poudres mouillables qui a la propriété de favoriser la dispersion et la suspension des particules solides ou liquides en réalisant autour des particules un réseau qui les empêche de s'agglomérer.

Spanish

Campo(s) temático(s)
  • Protección de las plantas
Save record 5

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