1,2,4,5-Tetrachlorobenzene → 2,4,5-Trichlorophenol

HRID 67803

Reaktionsgleichung

Reaktionsgleichung von HRID 67803
[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[C:5]([Cl:9])=[CH:4][C:3]=1Cl.[OH-:11].[Na+]>>[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[C:5]([Cl:9])=[CH:4][C:3]=1[OH:11]

Komponenten

3

Edukt 2

HCID 72701,2,4,5-TetrachlorobenzeneHCID 14798Sodium Hydroxide2×

Produkt 1

HCID 72712,4,5-Trichlorophenol

Versuchsvorschrift

The presently employed technology to produce 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) and 2,4,5-trichlorophenol (2,4,5-TCP) commercially involves the declorination of 1,2,4,5-tetrachlorobenzene with aqueous sodium hydroxide or anhydrous sodium hydroxide in the presence of alcohols under elevated temperatures and pressures to form 2,4,5-TCP according to the flow diagram: ##STR1## Under the conditions of alkalinity, temperature and pressure this process produces between 1 to 100 parts per million of the highly toxic teratogen 2,3,7,8-tetrachloro-dibenzo-p-dioxin (TCDD) according to the reaction: ##STR2##

Quellen und Nachweise

ORD-Eintrag
ord-fae4a4ad09ea4bdbb8114fea4089e1f4
Quelldatensatz
uspto-grants-1982_08
Patentnummer
US04346248

Verknüpfte Notizen

Wird geladen…