公开(公告)号：US20200376458A1

公开(公告)日：2020-12-03

申请号：US16636774

申请日：2018-07-17

Applicant: BASELL POLIOLEFINE ITALIA S.R.L.

Inventor： GIAN LUCA BONACCORSI ,  GIUSEPPE PENZO ,  ENRICO BALESTRA ,  MAURIZIO DORINI ,  RICCARDO RINALDI

IPC: B01J19/06 ,  B01J19/24

Abstract: A manhole for a polymerization unit having a through-hole formed with a shoulder matching a corresponding shoulder of a plug of a closure member operatively inserted in the through-hole. The through-hole can be closed with a minimum clearance, such that polymer particles do not deposit in the gap between the wall of the unit and the plug of the closure member.

公开(公告)号：US20190336930A1

公开(公告)日：2019-11-07

申请号：US16477283

申请日：2017-12-15

Applicant: BASELL POLIOLEFINE ITALIA S.R.L.

Inventor： ENRICO BALESTRA ,  TIZIANA CAPUTO ,  MASSIMO COVEZZI ,  MAURIZIO DORINI ,  ANTONIO MAZZUCCO ,  GABRIELE MEI ,  RICARDO RINALDI

IPC: B01J8/24 ,  B01J8/18 ,  C08F2/01 ,  C08F2/44

Abstract: A fluid is fed into a polymer bed of a fluidized bed gas phase polymerization reactor by introducing the fluid into the polymer bed through a distributor protruding into the fluidized bed zone of the reactor and terminating with a discharge end positioned so that the following equation is fulfilled: d/D>0.002 wherein d is the distance of the distributor's discharge end from the wall of the reactor, and D is the diameter of the reactor in the fluidized bed zone.