发明名称 |
PROCESS FOR THE GAS-PHASE POLYMERIZATION OF OLEFINS |
摘要 |
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. |
申请公布号 |
US2015232588(A1) |
申请公布日期 |
2015.08.20 |
申请号 |
US201314429585 |
申请日期 |
2013.09.05 |
申请人 |
BASELL POLIOLEFINE ITALIA S.R.L. |
发明人 |
Balestra Enrico;Caputo Tiziana;Dorini Maurizio;Mazzucco Antonio;Soffritti Silvia |
分类号 |
C08F10/06;B01J19/24 |
主分类号 |
C08F10/06 |
代理机构 |
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代理人 |
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主权项 |
1. A process for producing olefin polymers, which comprises the steps of:
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 bottom 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. |
地址 |
Milano IT |