Device for feeding reactor initiators

Details Device for feeding reactor initiators Device for feeding reactor initiators

2005-10-04

2005-10-04

Cheung, William K. (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymerizing in tubular or loop reactor

C526S352000, C422S129000, C422S132000, C422S137000

Reexamination Certificate

active

06951908

ABSTRACT:
In a process for preparing polyethylene in tube reactors with or without autoclaves, where a free-radical initiator is introduced with or without cold ethylene into a flowing ethylene- and comonomer-containing medium, rotation is generated between two streams (61, 62) to be mixed at an angle (66) or by provision of a swirl element (20, 80) in the flow cross section (27, 28). In the region of a feed point (72, 81) for a free-radical initiator, there is provided a cross-sectional constriction (63, 67, 71) at which the free-radical initiator is introduced through an optimized off-center outlet opening (44) of an introduction finger (40) into the rotating flow (61, 62, 70).

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patent: 96/35506 (1996-11-01), None
patent: WO 96/35506 (1996-11-01), None

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