Distillation: processes – separatory – Adding material to distilland except water or steam per se – Organic compound
Patent
1988-08-30
1990-02-06
Bascomb, Wilbur
Distillation: processes, separatory
Adding material to distilland except water or steam per se
Organic compound
203 73, 570136, 570153, 570178, B01D 334, C07C 1738
Patent
active
048986453
ABSTRACT:
A process is described for the production of pure tetrafluoroethylene from a gas formed in the pyrolysis of a fluorocarbon compound having 1 to 4 carbon atoms, which can contain a hydrogen atom and a chlorine atom. The pyrolysis gas, after hydrogen chloride or hydrogen fluoride and also if necessary steam have been separated off, is condensed under pressure and distilled in a plurality of columns, in the first column the low boilers being distilled off, preferably with a reflux ratio of 6 to 15 kg per kg of tetrafluoroethylene produced, and in the second column tetrafluoroethylene, preferably with a reflux ratio of 3 to 5 kg per kg of tetrafluoroethylene produced. Per kg of tetrafluoroethylene produced, from 0.6 to 2 kg of difluoromonochloromethane are fed into the second column as a distillation aid. The novel process makes it possible to produce pure tetrafluoroethylene at comparatively reduced energy and apparatus costs.
REFERENCES:
patent: 2406794 (1946-09-01), Benning et al.
patent: 3101304 (1963-08-01), Wiist
patent: 3152051 (1964-10-01), Fainberg et al.
patent: 3282801 (1966-11-01), Wiist
Freudenreich Reinhold
Voigt Hartmut
Bascomb Wilbur
Hoechst Aktiengesellschaft
LandOfFree
Process for the production of pure tetrafluoroethylene does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the production of pure tetrafluoroethylene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of pure tetrafluoroethylene will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-440377