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1. (WO1991017972) IMPROVED PROCESS FOR PREPARING AROMATIC FLUORIDES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/017972 International Application No.: PCT/US1991/003370
Publication Date: 28.11.1991 International Filing Date: 14.05.1991
Chapter 2 Demand Filed: 05.12.1991
IPC:
C07B 39/00 (2006.01) ,C07C 17/093 (2006.01)
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
B
GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
39
Halogenation
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
17
Preparation of halogenated hydrocarbons
093
by replacement by halogens
Applicants:
MALLINCKRODT SPECIALTY CHEMICALS COMPANY [US/US]; 16305 Swingley Ridge Road Chesterfield, MO 63107, US
Inventors:
CANTRELL, Gary, L.; US
Agent:
BOONE, Jeffrey, S.; Mallinckrodt Specialty Chemicals Company 16305 Swingley Ridge Drive Chesterfield, MO 63017, US
Priority Data:
527,79623.05.1990US
Title (EN) IMPROVED PROCESS FOR PREPARING AROMATIC FLUORIDES
(FR) PROCEDE AMELIORE DE PREPARATION DE FLUORURES AROMATIQUES
Abstract:
(EN) An improved process is disclosed for preparing aromatic fluorides by diazotization-fluorination in hydrogen fluoride. The improvement includes, prior to the decomposition of the diazonium fluoride, adding to the diazotizing reaction mixture, urea or a salt thereof in an amount sufficient to reduce the vapor pressure of hydrogen fluoride over the diazonium solution. Also disclosed is a process for reducing the vapor pressure over diazonium fluoride solutions.
(FR) Procédé amélioré de préparation de fluorures aromatiques par diazotation-fluorination dans du fluorure d'hydrogène. L'amélioration consiste, avant la décomposition du fluorure de diazonium, à ajouter au mélange de réaction de diazotation, de l'urée ou un sel de celle-ci en une quantité suffisante pour réduire la pression de vapeur du fluorure d'hydrogène sur la solution de diazonium. L'invention concerne également un procédé de réduction de la pression de vapeur sur des solutions de fluorure de diazonium.
Designated States: JP
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)