Method of pump-around cooling reaction mass during polymerizatio

Details Method of pump-around cooling reaction mass during polymerizatio Method of pump-around cooling reaction mass during polymerizatio

1976-09-30

1978-05-16

Davis, Jr., Albert W.

Heat exchange

Regenerator

Checker brick structure

23285, 23288E, 23288K, 165DIG5, 260695, B01J 100

Patent

active

040893650

ABSTRACT:
Cooling the highly viscous reaction mass during catalytic polymerization of liquid olefins to polyolefins by pumping it to and from the reactor through the tubes of a heat transfer single pass cooler rather than a heat transfer multi-pass cooler as has been done in the past, increasing the number of the tubes in the single pass cooler as compared to the multi-pass cooler, reducing the diameter of the tubes and increasing the pump capacity. The number of tubes and pump capacity are increased sufficiently and the internal diameters of the tubes are decreased sufficiently so that the heat transfer coefficient of the single pass cooler is between 10 and 20 BTU/ft.sup.2 hr. .degree. F.

REFERENCES:
patent: 2984657 (1961-05-01), Grundmann et al.
patent: 3529940 (1970-09-01), Shima et al.

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