Abstract:
A system and method for integrating the removal of volatiles from a liquid hydrocarbon feed to the polyolefin polymerization system and the recovery of hydrocarbons from a polyolefin production process vent stream is provided. Th method and the system remove gases dissolved in the monomer feed to a polymerisation rector by means of a stripping column. The dissoled gases are oxygen, carbon monoxide or carbon dioxide and can be a poison for the catalys used in the poymerisation reaction. The stripping gas is a vent gas coming from the poymerisation process / apparatus or the resin purging. Possibly one single stripping column is used to remove the gases in the combined feed to the polymerisation reactor. The system and the method can be used for producing polyethylene.
Abstract:
A method and system for removing volatiles from liquid hydrocarbons being fed to a polyolefin polymerization system is provided. More specifically, a system and method for integrating the removal of volatiles from a liquid hydrocarbon feed to the polyolefin polymerization system and the recovery of hydrocarbons from a polyolefin production process vent stream is also provided.
Abstract:
Systems and methods for removing a volatile catalyst poison from a liquid hydrocarbon are provided. In one embodiment, a process vent (106) can be introduced to a vent recovery system (108) to provide a recycle gas (110). A first portion of the recycle gas (112) and a liquid hydrocarbon (102) can be introduced to a stripper column (104) to provide a stripper vent gas (114) and a degassed liquid hydrocarbon (116) that can be introduced to a polymerization process.
Abstract:
A process for integrating the recovery of hydrocarbons from a vent stream and the production of a nitrogen-rich liquid by: providing a vent to recovery including a monomer, wherein the vent to recovery originates from a polymerization process; separating the vent to recovery to form a primary recovered hydrocarbon and a primary recovered gas; separating the primary recovered gas to form a secondary recovered hydrocarbon and a warm residual gas, wherein the separation is by condensing the secondary recovered hydrocarbon, wherein an open-loop refrigeration cycle supplies cooling for the condensation, and wherein the open-loop refrigeration cycle produces a nitrogen- rich liquid; and recycling the primary recovered hydrocarbon to the polymerization process.
Abstract:
A process for integrating the recovery of hydrocarbons from a vent stream and the production of a nitrogen-rich liquid by: providing a vent to recovery including a monomer, wherein the vent to recovery originates from a polymerization process; separating the vent to recovery to form a primary recovered hydrocarbon and a primary recovered gas; separating the primary recovered gas to form a secondary recovered hydrocarbon and a warm residual gas, wherein the separation is by condensing the secondary recovered hydrocarbon, wherein an open-loop refrigeration cycle supplies cooling for the condensation, and wherein the open-loop refrigeration cycle produces a nitrogen- rich liquid; and recycling the primary recovered hydrocarbon to the polymerization process.