Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – By addition of entire unsaturated molecules – e.g.,...
Patent
1991-12-20
1993-10-19
Pal, Asok
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
By addition of entire unsaturated molecules, e.g.,...
585800, C07C 222
Patent
active
052547841
ABSTRACT:
The invention relates to a method for removing a boron trifluoride from the exhaust gases of a vacuum pump, which gases have been obtained when polymerizing .alpha.-olefines by using a BF.sub.3 -alcohol complex as a catalyst. In a vacuum distillation, the underpressure is achieved by means of a pump sealed with a fluid ring or by means of fluid jet with a torque or ejector pump, possibly assisted by a mechanical blaster, such as a propellant circulating pump. In this pump, the fluid ring or the fluid jet is formed by a cocatalyst forming a complex with the BF.sub.3 catalyst, which cocatalyst is an alcohol, preferably butanol.
REFERENCES:
patent: 4263467 (1981-04-01), Madgarker et al.
patent: 4956512 (1990-09-01), Nissfolk et al.
patent: 4982042 (1991-01-01), Akatsu et al.
Happonen Vesa-Matti
Linnaila Raimo
Nissfolk Fredrik
Nurminen Matti
Neste Oy
Pal Asok
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