| 摘要 |
The present invention relates to an apparatus and a process for polymerisation, and, in particular, provides an apparatus for gas phase fluidised bed polymerisation of olefins, which apparatus comprises:
A) a first section which is an upright cylindrical section having a diameter, D 1 , and cross-sectional area, A 1 , and
B) a second section, provided vertically above the first section and centred about a common vertical axis to the upright cylindrical first section, the base of the second section having a cylindrical cross-section of diameter D 1 and being joined to the top of the first section, and the horizontal cross-sectional area of the second section above its base being greater than the cross-sectional area of the first section, characterised in that:
i) D 1 is greater than 4.5 metres, and
ii) the second section has a maximum horizontal cross-sectional area, A 2 , which is between 3.2 and 6 times the cross-sectional area, A 1 , of the first section. |
