公开(公告)号：EP2897987A1

公开(公告)日：2015-07-29

申请号：EP13760006.0

申请日：2013-09-05

Applicant: Basell Poliolefine Italia S.r.l.

Inventor： BALESTRA, Enrico ,  CAPUTO, Tiziana ,  DORINI, Maurizio ,  MAZZUCCO, Antonio ,  SOFFRITTI, Silvia

IPC: C08F10/00 ,  C08F2/34 ,  C08F2/01 ,  B01J8/24

CPC classification number: C08F10/06 ,  B01J8/24 ,  B01J8/26 ,  B01J8/388 ,  B01J19/24 ,  B01J2208/00274 ,  B01J2208/00283 ,  B01J2208/00734 ,  B01J2219/00164 ,  B01J2219/24 ,  C08F10/00 ,  C08F210/06 ,  C08F2/34 ,  C08F2/005 ,  C08F2/001 ,  C08F210/16 ,  C08F2500/12 ,  C08F2/01

Abstract: A process and apparatus for producing olefin polymers are disclosed, comprising: a. polymerizing one or more olefins in the gas phase, in the presence of an olefin polymerization catalyst, whereby growing polymer particles flow along a cylindrically- shaped downward path in densified form under the action of gravity so as to form a densified bed of downward-flowing polymer particles b. allowing said polymer particles to flow through a restriction of the densified bed, such restriction being positioned in a restriction zone extending from the bed upward to a distance of 15% of the total height of the densified bed; and c. metering an antistatic agent through a feed line connected to the densified bed at a feed point being located in a feed zone extending from the top of the restriction upward, to a distance five times the diameter of the section of the densified bed above the restriction.

公开(公告)号：EP2613873A1

公开(公告)日：2013-07-17

申请号：EP11751905.8

申请日：2011-09-02

Applicant: Basell Poliolefine Italia S.r.l.

Inventor： SOFFRITTI, Silvia ,  RINALDI, Riccardo ,  DORINI, Maurizio ,  PENZO, Giuseppe

IPC: B01J8/00 ,  B01J8/18 ,  B01J8/24 ,  B01J8/38 ,  B01J8/44

CPC classification number: B01J8/0085 ,  B01J8/0055 ,  B01J8/1827 ,  B01J8/388 ,  B01J8/44 ,  B01J2208/00274 ,  B01J2208/00292 ,  B01J2208/00557 ,  B01J2208/00584 ,  B01J2208/00681 ,  B01J2208/0069 ,  B01J2208/00707 ,  B01J2219/0077 ,  C08F10/02 ,  C08F110/06 ,  C08F210/06 ,  C08F2/34 ,  C08F2/001 ,  C08F2500/12 ,  C08F2500/24 ,  C08F210/16

Abstract: A gas-phase polymerization reactor having interconnected polymerization zones comprising:—a riser through which the polymer particles flow upwards under fast fluidization conditions or transport conditions;—a downcomer through which the polymer particles flow downward in a densified form under the action of gravity, the bottom of said downcomer being connected to the lower region of said riser by means of a transport section, said transport section being designed as a bend descending from the downcomer to the riser.

Abstract translation: 具有相互连通的聚合区的气相聚合反应器包括： - 提升管，其中聚合物颗粒在快速流化条件或输送条件下向上流动; - 降液管，聚合物颗粒在重力作用下以致密化形式向下流动， 所述降液管的底部借助于运输部分连接到所述提升管的下部区域，所述输送部分被设计成从降液管下降到提升管的弯道。

公开(公告)号：EP2585501A1

公开(公告)日：2013-05-01

申请号：EP11726108.1

申请日：2011-06-09

Applicant: Basell Poliolefine Italia S.r.l.

Inventor： BALESTRA, Enrico ,  CAPUTO, Tiziana ,  MAZZUCCO, Antonio ,  RINALDI, Riccardo ,  SOFFRITTI, Silvia

IPC: C08F210/06 ,  C08F2/34 ,  C08F2/00

CPC classification number: C08F2/01 ,  C08F210/06 ,  C08F2/001 ,  C08F2/34 ,  C08F210/14 ,  C08F210/16

Abstract: A process for the gas-phase copolymerization of: (a)propylene, (b) at least one C
4 -C
8 α-olefin, and (c) optionally ethylene, the process being carried out in a reactor having two interconnected polymerization zones, wherein the growing polymer particles flow through the first of said polymerization zones (riser) under fast fluidization conditions, leave said riser and enter the second of said polymerization zones (downcomer) through which they flow downward in a densified form, leave said downcomer and are reintroduced into said riser, thus establishing a circulation of polymer between the riser and the downcomer, the gas mixture present in the riser being at least partially prevented from entering the downcomer by introducing into the upper part of said downcomer a liquid barrier having a composition different from the gaseous mixture present in the riser and comprising at least one C
4 -C
8 α-olefin in a total amount of from 0.1% to 35% by mol.

公开(公告)号：EP2225022B1

公开(公告)日：2011-06-08

申请号：EP08863810.1

申请日：2008-12-17

Applicant: Basell Poliolefine Italia S.r.l.

Inventor： MAZZUCCO, Antonio ,  RINALDI, Riccardo ,  SOFFRITTI, Silvia ,  BALESTRA, Enrico ,  PENZO, Giuseppe ,  MEI, Gabriele

IPC: B01J19/24 ,  C08F10/00

CPC classification number: B01J19/2435 ,  B01J2219/00164 ,  B01J2219/00166 ,  B01J2219/00173 ,  C08F10/00 ,  C08F110/06 ,  C08F210/06 ,  C08F2/34 ,  C08F2/001 ,  C08F2500/05 ,  C08F210/16

Abstract: A process for the gas-phase polymerization of α-olefms carried out in two interconnected polymerization zones, wherein the growing polymer particles flow through the first of said polymerization zones (riser) under fast fluidization conditions, leave said riser and enter the second of said polymerization zones (downcomer) through which they flow downward in a densified form, the process being characterized in that: (a) the gas mixture present in the riser is totally or partially prevented from entering the downcomer by introducing into the upper part of said downcomer a liquid stream LB having a composition different from the gaseous mixture present in the riser; (b) the ratio R between the flow rate Fp of polymer circulated between said downcomer and said riser and the flow rate LB of said liquid being adjusted in a range from 10 to 50.