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ALCOYLE [9 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2012-10-19

English

Subject field(s)
  • Chemical Elements and Compounds
  • Chemical Engineering
OBS

Irium® is Pepsodent's registered trademark for purified alkyl sulfate.

Key term(s)
  • Irium

French

Domaine(s)
  • Éléments et composés chimiques
  • Génie chimique

Spanish

Save record 1

Record 2 2012-01-04

English

Subject field(s)
  • Chemical Elements and Compounds

French

Domaine(s)
  • Éléments et composés chimiques
DEF

Groupe qui renferme un groupe alkyle (en anglais : «alkyl group»), c'est-à-dire un groupe univalent CnH2n+1 résultant formellement de l'arrachement d'un atome d'hydrogène à un alcane.

Spanish

Save record 2

Record 3 2011-03-21

English

Subject field(s)
  • Chemical Elements and Compounds
  • Petrochemistry
DEF

A paraffinic hydrocarbon group which may be derived from an alkane by dropping one hydrogen from the formula. Examples are methyl, ... ethyl, ... propyl, ... isopropyl ... Such groups are often represented in formulas by the letter R and have the generic formula CnH2n+1.

DEF

alkyl groups: Univalent groups derived from alkanes by removal of a hydrogen atom from any carbon atom -CnH2n+.

OBS

The [alkyl] groups derived by removal of a hydrogen atom from a terminal carbon atom of unbranched alkanes form a subclass of normal alkyl (n-alkyl) groups H[CH2]n. The groups RCH2, RxCH (R [not equal to] H, and R3C (R [not equal to] H are primary, secondary and tertiary alkyl groups, respectively.

OBS

n-alkyl: The letter "n" must be italicized.

Key term(s)
  • alkyl groups

French

Domaine(s)
  • Éléments et composés chimiques
  • Chimie du pétrole
DEF

Groupe monovalent dérivé des alcanes par enlèvement d'un atome d'hydrogène à l'un quelconque des atomes de carbone : -CnH2n+1.

OBS

[Les groupes alkyles] qui dérivent des alcanes linéaires par enlèvement d'un atome d'hydrogène à un atome de carbone terminal constituent la sous-classe des alkyles normaux (n-alkyles) : H[CH2]n-. Les groupes RCH2-, R2CH-(R[non égal à]H) et R3C-(R[non égal à]H) sont nommés respectivement groupes alkyles primaires, secondaires et tertiaires.

OBS

Ne pas confondre avec le terme voisin «groupe alkylé» (en anglais : «alkylated group»), qui désigne les groupes qui renferment un groupe alkyle.

Key term(s)
  • groupes alkyle
  • groupes alcoyle
  • alkyle
  • alkyles
  • alcoyle
  • alcoyles

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
  • Petroquímica
CONT

Se usa la designación de amina primaria secundaria o terciaria para referirnos al número de grupos alquilos que están unidos al nitrógeno. Así, si la amina tiene un grupo alquilo y dos hidrógenos se le conoce como primaria, si tiene dos alquilos y un hidrógeno, secundaria y con tres grupos alquilo sin hidrógeno, terciaria.

CONT

Los halogenuros de alquilo tienen la fórmula general RX, donde R representa un grupo alquilo o alquilo sustituido.

CONT

Bencenos sustituidos por grupos alquilo se nombran de dos formas diferentes dependiendo del tamaño del grupo alquilo.

Key term(s)
  • grupos alquilo
  • grupos alquilos
  • alquilo
  • alquilos
Save record 3

Record 4 2003-02-06

English

Subject field(s)
  • Chemical Elements and Compounds
  • Aromatic Hydrocarbons

French

Domaine(s)
  • Éléments et composés chimiques
  • Hydrocarbures aromatiques
OBS

naphta de pétrole (fraction des alkylés lourds).

Spanish

Save record 4

Record 5 2001-02-01

English

Subject field(s)
  • Chemical Elements and Compounds
  • Pollutants
CONT

Alkyl lead compounds ... are produced mainly as lead additives for gasoline. ... Levels of alkylated lead in the environment have decreased since 1981 ... The presence of alkyl lead in the terrestrial environment, especially in urban areas, has been associated with adverse effects on children.

French

Domaine(s)
  • Éléments et composés chimiques
  • Agents de pollution
CONT

La présente directive, qui est la première directive particulière au sens de l'article 8 de la directive 80/1107/CEE, a pour objet la protection des travailleurs contre les risques pour leur santé, y compris la prévention de tels risques, découlant ou pouvant découler d'une exposition, pendant le travail, au plomb métallique et à ses composés ioniques; ne sont pas visés les composés alkylés du plomb.

Spanish

Save record 5

Record 6 2001-01-03

English

Subject field(s)
  • Chemical Elements and Compounds
  • Pollutants
CONT

During the last 150 years the industrial use of lead has increased enormously and since the mid- 1920's the use of alkyl lead derivatives as anti-knock agents in petrol has caused a further massive increase in distribution, only recently curbed by the substitution of "lead free" petrol.

French

Domaine(s)
  • Éléments et composés chimiques
  • Agents de pollution
CONT

Composés organiques visés à l'annexe III [intitulée «Facteurs d'impact directs»] : acétaldéhyde, acide acrylique, [...] biphényles, chloroacétaldéhyde, chloroforme (trichlorométhane), chlorométhane (chlorure de méthyle), chlorotoluène (chlorure de benzyle), Crésol, 2,4-diisocyanate de toluylène, dérivés alkylés du plomb, dichlorométhane (chlorure de méthylène), [...]

Spanish

Save record 6

Record 7 1992-09-16

English

Subject field(s)
  • Chemical Elements and Compounds

French

Domaine(s)
  • Éléments et composés chimiques
OBS

Gr. Larousse.

Spanish

Save record 7

Record 8 1981-01-26

English

Subject field(s)
  • Chemistry
  • Water Treatment (Water Supply)
CONT

All the strongly-basic resins used for demineralization purposes belong to two main groups commonly known as type I and type II. The former consists of simply quaternary ammonium radicals, the latter of alkylated quaternary ammonium radicals.

French

Domaine(s)
  • Chimie
  • Traitement des eaux
CONT

Toutes les résines fortement basiques utilisées en déminéralisation dérivent de deux schémas généraux [...]. Le premier comporte des radicaux ammoniums quaternaires simples, le second des radicaux ammoniums quaternaires alcoyles.

Spanish

Save record 8

Record 9 1976-06-19

English

Subject field(s)
  • Chemistry

French

Domaine(s)
  • Chimie
OBS

269 b Canada

Spanish

Save record 9

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