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US 8,557,087 B2Granted
Process for the separation of a hydrocarbon-containing feed stream
AssigneeTotal Petrochemicals Research Feluy
InventorDenis Mignon
Life of this patent
Estimating the term…
Abstract
The present invention relates to a process for the separation by distillation of a hydrocarbon-containing feed stream containing olefin monomer, co-monomer and hydrocarbon diluent. The present invention also relates to a distillation system including a distillation column for carrying out the process according to the invention.
Claims17
A process for the separation of a hydrocarbon-containing feed stream comprising olefin monomer, co-monomer and hydrocarbon diluent, comprising:
- introducing said feed stream to a distillation column;
- subjecting said feed stream to distillation conditions whereby
- a bottom stream comprising substantially olefin-free hydrocarbon diluent is removed from the distillation column and stored in a bottom stream storage vessel;
- a side stream comprising hydrocarbon diluent is removed from the distillation column and stored in a side stream storage vessel;
- and
- an overhead vapor stream comprising olefin monomer, and a component selected from the group consisting of H2, N2, O2, CO, CO2 and formaldehyde is removed;
- removing bottom stream from said bottom stream storage vessel;
- feeding at least part of the bottom stream that is removed from the bottom stream storage vessel to said side stream storage vessel, wherein feeding at least a part of the bottom stream that is removed from the bottom stream storage vessel to said side stream storage vessel is regulated by measuring the level of said bottom stream in said bottom stream storage vessel, comparing said measured level with a pre-determined level, and when said measured level exceeds said pre-determined level, feeding at least part of the bottom stream that is removed from the bottom stream storage vessel to said side stream storage vessel.
5 more elements
A process for the separation of a hydrocarbon-containing feed stream comprising olefin monomer, co-monomer and hydrocarbon diluent, comprising:
- introducing said feed stream to a distillation column;
- subjecting said feed stream to distillation conditions whereby
- a bottom stream comprising substantially olefin-free hydrocarbon diluent is removed;
- a side stream comprising hydrocarbon diluent is removed;
- and
- an overhead vapor stream comprising olefin monomer, and a component selected from the group consisting of H2, N2, O2, CO, CO2 and formaldehyde is removed;
- and
- feeding at least a part of said bottom stream to said side stream, wherein a flow rate of the bottom stream removed from the distillation column is regulated by:
- determining a ratio set point (R′) which is equal to B′/F′, wherein B′ is the flow rate of bottom stream and F′ is a flow rate of the feed stream;
- measuring an actual flow rate (F) of the feed stream which is introduced in the distillation column;
- calculating a theoretical flow rate (B*) of bottom stream by multiplying the actual feed stream flow rate (F) by said ratio set point (R′);
- measuring an actual flow rate (B) of bottom stream which is removed from the distillation column;
- and
- regulating a flow rate of the reflux stream from a condensate vessel to said distillation column for adapting the actual bottom stream flow rate (B) to the theoretical bottom stream flow rate (B*).
11 more elements
A distillation system comprising:
- a distillation column which is configured to separate a hydrocarbon-containing feed stream comprising olefin monomer, co-monomer and hydrocarbon diluent into a bottom stream comprising substantially olefin-free hydrocarbon diluent, a side stream comprising hydrocarbon diluent and an overhead vapor stream comprising olefin monomer, and a component selected from the group consisting of H2, N2, O2, CO, CO2 and formaldehyde, wherein said distillation system comprises:
- a feeding line for feeding said feed stream to said distillation column;
- a removal device for removing said bottom stream from said distillation column, a bottom stream storage vessel operably connected to said removal device for storing removed bottom stream, and a removal line operably connected to said bottom stream storage vessel for removing bottom stream from said bottom stream storage vessel;
- a removal device for removing said side stream from said distillation column, a side stream storage vessel operably connected to said removal device for storing removed side stream, and a removal line operably connected to said side stream storage vessel for removing side stream from said side stream storage vessel;
- a removal device for removing said overhead vapor stream from said distillation column;
- a connecting line connecting said removal line operably connected to said bottom stream storage vessel with said side stream storage vessel;
- and
- a level controller for measuring the level of bottom stream in said bottom stream storage vessel and for regulating feeding of at least a part of said bottom stream to said side stream, and a valve which is provided on said connecting line and operably connected to said level controller.
5 more elements
Dependencies are inferred from the claim text.