Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Patent
1986-09-18
1988-07-26
Evans, J. E.
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
570241, 570245, 570254, 570262, C07C 1702, C07C 17154, C07C 1738
Patent
active
047602074
ABSTRACT:
In a process for producing 1,2-dichloroethane or ethylene dichloride ("EDC") in a high temperature direct chlorination ("HTDC") reactor in which ethylene is reacted with wet chlorine having a water content more than 100 ppm but no more than 1% by wt of the chlorine, the water leaves the reactor with the EDC product draw-off, either in the vapor overhead (if the HTDC is a boiling reactor), or, as a liquid sidestream (if the HTDC is a non-boiling reactor). In a subsequent step, the EDC draw-off is distilled in a product distillation column in which the water leaves in the overhead which is condensed to remove condensables in a first stage, and vent a non-condensable vent streams. The vent stream is corrosive due to the presence of minor amounts of chlorine, HCl and water, along with oxygen which is injected into the HTDC to improve selectivity of the reaction. The vent gases from the first stage are further cooled to a temperature in the range from about -30.degree. C. to about 0.degree. C. to condense condensables and freeze water without plugging the liquid lines. Plugging is avoided provided the vent stream contains less than 1.5% by wt of water, based on the weight of the vent stream. The essentially moisture-free non-condensables remaining are relatively non-corrosive and may be recycled to an oxychlorination reactor, also for the production of EDC, without unduly sacrificing the vent compressor and other carbon steel equipment in the recycle line.
REFERENCES:
patent: 4046822 (1977-09-01), Severino
patent: 4590317 (1986-05-01), Linczyk
Lange, "Handbook of Chemistry" 10th Ed. (1961), pp. 256 and 257.
B.F. Goodrich Company
Evans J. E.
LandOfFree
Recovery of ethylene, chlorine and HCl from vented waste gas fro does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Recovery of ethylene, chlorine and HCl from vented waste gas fro, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recovery of ethylene, chlorine and HCl from vented waste gas fro will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-259012