Abstract:
The present invention relates to a feed distribution device in separation columns and a method of operation. In particular it relates to distillation columns in which the feed stream is substantially liquid phase, or a mixture of gas and liquid upstream of the column, but where the feed vaporizes or vaporizes more when it enters the column. More specifically, the feed distribution device contains a plurality of opening which allow the feed to vaporize inside the column and where the openings are maintained in critical condition during operation. Significant advantage is achieved through the implementation and use of the present feed distribution device.
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.