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US 10,766,984 B2Granted
High pressure polyethylene product cooling
AssigneeExxonMobil Chemical Patents Inc.
InventorsHenri A. Lammens, Paul J. Clymans, Cindy Dewitte
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Abstract
This disclosure relates to systems and processes for cooling polymer product mixtures manufactured at high pressure. The processes of the invention involve cooling and then subsequently reducing the pressure of the product mixture from the reactor. In the systems of the invention, a product cooler is located downstream of the high pressure reactor and upstream of a high pressure let down valve.
Claims24
A process for producing an ethylene-based polymer, the process comprising:
- a. compressing ethylene monomer to a pressure of at least 122 MPa;
- b. in a high pressure reactor, forming a product mixture comprising an ethylene-based polymer from the compressed ethylene monomer;
- and
- c. cooling the product mixture in a product cooler located downstream of the high pressure reactor and subsequently reducing a pressure of the product mixture in a high-pressure let down valve downstream of the product cooler.
1 more element
A system for producing an ethylene-based polymer, the system comprising:
- a. a compressor system adapted to compress ethylene monomer to a pressure of at least 122 MPa;
- b. a reactor in which a product mixture comprising the ethylene-based polymer is formed;
- c. a high pressure let down valve downstream of the reactor;
- and
- d. a product cooler downstream of the reactor and upstream of the high pressure let down valve, and through which the product mixture is passed.
2 more elements
Dependencies are inferred from the claim text.