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Process for polymerising an olefin monomer in at least one continuous
tubular loop reactor of a multiple reactor system, optionally together
with an olefin comonomer, in the presence of a polymerisation catalyst in
a diluent, to produce a slurry containing solid particulate olefin
polymer and diluent. The average internal diameter of at least 50% of the
total length of the continuous tubular loop reactor is at least 700 mm. A
high molecular weight (HMW) polymer is made in a first reactor and a low
molecular weight (LMW) polymer is made in a second reactor, the first
(HMW) reactor having a space time yield (defined as production of polymer
in kg/h per unit volume of reactor) greater than 100 kg/m.sup.3/h, and
the ratio of space time yield in the first (HMW) reactor to the second
(LMW) reactor is greater than 1.
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< Shear thinning ethylene/.alpha.-olefin interpolymers and their preparation
< Method of restoring catalytic activity to a spent hydroprocessing catalyst, a spent hydroprocessing catalyst having restored catalytic activity, and a hydroprocessing process
> Carrier, a process for preparing the carrier, an olefin epoxidation catalyst, a process for preparing the catalyst, and a process for the production of an olefin oxide, A 1,2-diol, A 1,2-diol ether, or an alkanolamine
> Direct epoxidation process using a mixed catalyst system
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~ 00608
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