Polymer stream transfer

Details Polymer stream transfer Polymer stream transfer

2011-05-17

2011-05-17

Boykin, Terressa M (Department: 1765)

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

Synthetic resins

Treating polymer containing material or treating a solid...

C422S144000, C422S145000, C526S065000, C526S348000, C526S351000, C526S352000, C528S480000

Reexamination Certificate

active

07943727

ABSTRACT:
Process for heating a polymer-containing stream being transferred from a polymerization reactor to a degassing vessel operating at a pressure between 6 bara and 12 bara. The process includes passing the stream through a heater comprising a transfer line for the stream and a device for heating the transfer line. The ratio of the stream velocity at the outlet of the heater to that at the inlet, Vo/Vi, is at least 1.1, typically between 1.2 and 4, and the total specific heat transfer area of the transfer line is at least 0.5 m2per tonne/h of production of polymer. The pressure drop across the length of the heater is less than 0.5 bar per tonne/h of polymer, such that at least 90 mol % of the hydrocarbon fluids withdrawn from the polymerization reactor operation are vaporized before entry into the degassing vessel.

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PCT International Preliminary Report on Patentability; PCT International No. PCT/EP2007/008601; Int'l Filing Date Oct. 4, 2007.

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