Apparatus and method for the production of polyethylene and...

Details Apparatus and method for the production of polyethylene and... Apparatus and method for the production of polyethylene and...

2006-10-26

2009-11-24

Teskin, Fred M (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S064000, C526S920000, C422S131000

Reexamination Certificate

active

07622536

ABSTRACT:
The invention relates to an apparatus for the high pressure polymerisation of ethylene which comprises a high pressure reactor; a conduit for the supply of ethylene to the reactor, the conduit being provided with a preheater for heating the ethylene; a waste heat boiler for the production of medium pressure steam; a source of high pressure steam; and a steam distribution system comprising a medium pressure steam net for the distribution of medium pressure steam from the waste heat boiler, in which the preheater comprises first, second and third sections and the steam distribution system is such that the first section can be supplied with steam from the medium pressure steam net, the second section can be supplied with steam from the medium pressure steam net or with high pressure steam and the third section can be supplied with high pressure steam.

REFERENCES:
patent: 3810975 (1974-05-01), Brooke
patent: 7435784 (2008-10-01), Lee et al.
patent: 2004/0214968 (2004-10-01), Berhalter et al.
patent: 1008597 (1977-04-01), None
patent: 2134121 (1984-08-01), None

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