SETT VID POLYMERISATION AV ETEN I EN RORFORMIG, MED SIDOGRENAR FORSEDD REAKTOR

摘要

A method for avoiding decomposition of ethylene during polymerization in a tube form reactor having one or more side branches opening into the reactor wherein the diameter of the side branches is made to be not greater than about 12 mm and a flow number is maintained at between about 0.20 m2/sec. and 0.55 m2/sec, the flow number being defined as the product of the internal diameter of the tube reactor and the rate of flow of the reactant through the reactor. Flow numbers greater than 0.55 m2/sec can be used as long as the diameter of the side branches is reduced to not more than 10 mm.