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US 4,452,956 AGranted
Discrete spiral flow imparting device
AssigneeUnion Carbide Corporation
InventorsIsaac Moked, Richard H. Handwerk, Hans J. Goettler
Life of this patent
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Abstract
Apparatus for imparting spiral motion to material flowing in a tube comprising a relatively short spiral member anchored to prevent movement relative to said tube, said spiral member having maximum length shorter than said tube, said spiral member capable of imparting spiral motion to the entire amount of material flowing in said tube.
Claims4
A process for manufacturing polyolefin or copolymers of olefin containing up to 60 mole percent of other polymerizable monomer comprising:
- (a) supplying monomer at pressure of at least 15,000 psig to an inlet of a tubular reactor having a length to diameter ratio of at least 500 to 1 and containing a tube in said reactor;
- (b) polymerizing said monomer in presence of free-radical-generating initiator at temperature of at least 100.degree. C.;
- (c) imparting spiral motion to material flowing through said reactor by flowing the material past a spiral member, said spiral member having maximum length shorter than said tube;
- and
- (d) removing polymer and unpolymerized monomer from an outlet of said reactor.
2 more elements
Dependencies are inferred from the claim text.