Patent · US Active

Method and apparatus for controlling the recovery of solid polyolefin from a continuous reaction zone

US8026322B2 · kind B2 · utility

1Cited by

1References

1Claims

0Family size

Assignee

Total Petrochemicals Research Feluy · BE

Inventor

Mark Verleysen · Ekeren, BE

Key dates

Filing date	Feb 9, 2005
Grant date	Sep 27, 2011
Priority date	—
Expiry date	May 5, 2027

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2208/00769
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A Polymerisation process and a loop reactor comprising polymerising olefins in a liquid diluent to produce a liquid slurry containing particles of normally solid polymer within the loop reactor, allowing the polymer to settle in a settling leg, periodically opening a 180° rotating product take-off valve located at the end of the settling leg to allow a charge of particles to flow out of the settling leg, the product take-off valve being operated by a pneumatically driven double-acting actuator, the pneumatic system being regulated by a system comprising pneumatic control valves, the improvement which consists in using automatic control valves, which are automatic v-ball valves.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.