Separations with ionic liquid solvents

Ethylene separation with pressure swing adsorption

A process for component separation in a polymer production system comprising: (a) separating a polymerization product into a gas stream and a polymer stream; (b) processing the gas stream in distillation columns to yield a light hydrocarbon stream (LHS) comprising ethylene and ethane; (c) contacting LHS with a purged hydrocarbon adsorber to yield a loaded hydrocarbon adsorber and a non-adsorbed gas stream, wherein ethane is adsorbed by the purged hydrocarbon adsorber at a first pressure to yield adsorbed ethane, and wherein the non-adsorbed gas stream comprises recovered ethylene; (d) contacting the loaded hydrocarbon adsorber with a sweeping gas stream at a second pressure to yield an unloaded hydrocarbon adsorber and a recovered adsorbed gas stream comprising the sweeping gas stream and desorbed ethane; and (e) contacting the unloaded hydrocarbon adsorber with the sweeping gas stream at the first pressure to yield the purged hydrocarbon adsorber and a spent sweeping gas.

Separations with ionic liquid solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit.

Separations with ionic liquid solvents

Separations with ionic liquid solvents

A method comprising providing a process stream comprising an acid gas, e.g. carbon dioxide or hydrogen sulphide or mixture, capturing at least a portion of the acid gas from the process stream by an ionic liquid solvent, and recovering at least a portion of a captured acid gas from the ionic liquid solvent. Also disclosed is a process system comprising an acid gas, a separator comprising an ionic liquid solvent, wherein the ionic liquid solvent captures at least a portion of the acid gas, a regenerator to receive the captured stream, wherein the regenerator regenerates the ionic liquid solvent and emits at least a portion of a recovered acid gas. Further disclosed, is wherein a second gas component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gas component maybe recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gas component from the process stream maybe uncaptured by the ionic liquid solvent, and the uncaptured second gas component maybe recovered from a membrane unit.

System and method for rapid dump tank heating

A method of operating a dump tank of a polymer production process by transferring all or a portion of a content of a polymerization reactor into the dump tank, wherein the reactor contents comprise solid polymer, and liquid and gaseous non-product components, and removing at least a portion of the liquid and gaseous non-product components from the dump tank by: reducing a pressure of the dump tank, subjecting the solid polymer to a first cleaning stage comprising heating the solid polymer by introducing a first heated treatment gas into the dump tank, and subjecting the solid polymer to a second cleaning stage comprising purging the solid polymer by introducing a second heated treatment gas into the dump tank.

Separations with ionic liquid solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit.

SYSTEMS AND TECHNIQUES FOR HEATING POLYMER REACTOR FLASHLINES

A polyolefin reactor flashline heater system may include an enclosure, a heating section, and a transformer. The heating section is contained in the enclosure and extends between a first end and a second end. The first end is fluidically coupled to a polyolefin reactor product inlet. The second end is fluidically coupled to a heated product outlet. One or more pipe sections are coupled in series between the first end and the second end. The one or more pipe sections are formed of an electrically conducting material and have a predetermined diameter to transport a polyolefin reactor stream from the first end to the second end. The transformer is electrically coupled to the first end and the second end and configured to heat the heating section by impedance heating. A polymerization system may include a polyolefin reactor coupled to the polyolefin reactor flashline heater system.

Ethylene separation with temperature swing adsorption

A process for component separation in a polymer production system, comprising (a) separating a polymerization product stream into a gas stream and a polymer stream, (b) contacting the polymer stream with a purge gas to yield a purged polymer and a spent purge gas comprising purge gas, ethylene, and ethane, (c) contacting the spent purge gas with a temperature swing adsorber contactor (TSAC) to yield a loaded TSAC, wherein at least a portion of the ethylene is adsorbed by the TSAC at a first temperature to yield TSAC-adsorbed ethylene, wherein a portion of the ethane is adsorbed by the TSAC at the first temperature to yield TSAC-adsorbed ethane, (d) heating the loaded TSAC to a second temperature to yield a regenerated TSAC, and (e) contacting the regenerated TSAC with a sweeping gas stream to yield a recovered adsorbed gas stream comprising sweeping gas, recovered ethylene and recovered ethane.

Separations with ionic liquid solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit.

Separations with ionic liquid solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit.

System and method for rapid dump tank heating

A method of operating a dump tank of a polymer production process by transferring all or a portion of a content of a polymerization reactor into the dump tank, wherein the reactor contents comprise solid polymer, and liquid and gaseous non-product components, and removing at least a portion of the liquid and gaseous non-product components from the dump tank by: reducing a pressure of the dump tank, subjecting the solid polymer to a first cleaning stage comprising heating the solid polymer by introducing a first heated treatment gas into the dump tank, and subjecting the solid polymer to a second cleaning stage comprising purging the solid polymer by introducing a second heated treatment gas into the dump tank.

Hydrocarbon recovery with pressure swing adsorption

A process for component separation in a polymer production system comprising: (a) separating a polymerization product into a gas stream and a polymer stream; (b) processing the gas stream in distillation columns to yield a light hydrocarbon stream (LHS) comprising ethylene and ethane; (c) contacting LHS with a purged hydrocarbon adsorber to yield a loaded hydrocarbon adsorber and a non-adsorbed gas stream, wherein ethane is adsorbed by the purged hydrocarbon adsorber at a first pressure to yield adsorbed ethane, and wherein the non-adsorbed gas stream comprises recovered ethylene; (d) contacting the loaded hydrocarbon adsorber with a sweeping gas stream at a second pressure to yield an unloaded hydrocarbon adsorber and a recovered adsorbed gas stream comprising the sweeping gas stream and desorbed ethane; and (e) contacting the unloaded hydrocarbon adsorber with the sweeping gas stream at the first pressure to yield the purged hydrocarbon adsorber and a spent sweeping gas.

Hydrocarbon recovery with pressure swing adsorption

A process for component separation in a polymer production system comprising: (a) separating a polymerization product into a gas stream and a polymer stream; (b) processing the gas stream in distillation columns to yield a light hydrocarbon stream (LHS) comprising ethylene and ethane; (c) contacting LHS with a purged hydrocarbon adsorber to yield a loaded hydrocarbon adsorber and a non-adsorbed gas stream, wherein ethane is adsorbed by the purged hydrocarbon adsorber at a first pressure to yield adsorbed ethane, and wherein the non-adsorbed gas stream comprises recovered ethylene; (d) contacting the loaded hydrocarbon adsorber with a sweeping gas stream at a second pressure to yield an unloaded hydrocarbon adsorber and a recovered adsorbed gas stream comprising the sweeping gas stream and desorbed ethane; and (e) contacting the unloaded hydrocarbon adsorber with the sweeping gas stream at the first pressure to yield the purged hydrocarbon adsorber and a spent sweeping gas.

Ethylene separation with temperature swing adsorption

A process for component separation in a polymer production system, comprising (a) separating a polymerization product stream into a gas stream and a polymer stream, (b) contacting the polymer stream with a purge gas to yield a purged polymer and a spent purge gas comprising purge gas, ethylene, and ethane, (c) contacting the spent purge gas with a temperature swing adsorber contactor (TSAC) to yield a loaded TSAC, wherein at least a portion of the ethylene is adsorbed by the TSAC at a first temperature to yield TSAC-adsorbed ethylene, wherein a portion of the ethane is adsorbed by the TSAC at the first temperature to yield TSAC-adsorbed ethane, (d) heating the loaded TSAC to a second temperature to yield a regenerated TSAC, and (e) contacting the regenerated TSAC with a sweeping gas stream to yield a recovered adsorbed gas stream comprising sweeping gas, recovered ethylene and recovered ethane.

Component Separations in Polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.

Ethylene Recovery by Absorption

A process for recovery of ethylene from a polymerization product stream of a polyethylene production system, comprising separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein the contacting the light gas stream with the absorption solvent system occurs at a temperature in a range of from about 40° F. to about 110° F., wherein at least a portion of the unreacted ethylene from the light gas stream is absorbed by the absorption solvent system, and recovering unreacted ethylene from the absorption solvent system to yield recovered ethylene. 1. A process for the recovery of ethylene from a polymerization product stream of a polyethylene production system , the process comprising:separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene;contacting the light gas stream with an absorption solvent system, wherein the contacting the light gas stream with the absorption solvent system occurs at a temperature in a range of from about 40° F. to about 60° F., wherein at least a portion of the unreacted ethylene from the light gas stream is absorbed by the absorption solvent system; andrecovering unreacted ethylene from the absorption solvent system to yield recovered ethylene.2. The process of claim 1 , wherein the absorption solvent system comprises copper chloride claim 1 , aniline claim 1 , and N-methylpyrrolidone.3. The process of claim 1 , wherein the contacting the light gas stream with the absorption solvent system occurs at a temperature in a range from about 45° F. to about 55° F.4. The process of claim 1 , wherein the contacting the light gas stream with the absorption solvent system comprises bubbling the light gas stream through a packed bed in the absorption solvent system.5. The process of claim 1 , wherein the contacting the ...

Separations With Ionic Liquid Solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit. 1. A method comprising:providing a process stream comprising an olefin;capturing at least a portion of the olefin from the process stream by an ionic liquid solvent; andrecovering at least a portion of a captured olefin from the ionic liquid solvent.2. The method of claim 1 , wherein the ionic liquid solvent comprises a cation and an anion; wherein the cation comprises an ethylmethylimidazolium cation claim 1 , a butylmethylimidazolium cation claim 1 , a butylmethylpyridinium cation claim 1 , or combinations thereof; wherein the anion comprises a bis(trifluoromethanesulfonyl)amide anion claim 1 , a hexafluorophosphate anion claim 1 , a trifluoromethanesulfonate anion claim 1 , a dicyanamide anion claim 1 , a tetrafluoroborate anion claim 1 , a thiocyanate anion claim 1 , a nitrate anion claim 1 , a sulfonate anion claim 1 , a methylsulfate anion claim 1 , or combinations thereof.3. The method of claim 1 , wherein the ionic liquid solvent comprises a Ag(I) salt claim 1 , a Cu(I) salt claim 1 , or combinations thereof.4. The method of claim 3 , wherein the Ag(I) salt comprises silver(I) bis(trifluoromethanesulfonyl)amide claim 3 , silver(I) trifluoromethanesulfonate claim 3 , silver(I) nitrate claim 3 , or combinations thereof.5. The method of claim 3 , wherein the Cu(I) salt comprises ...

Ethylene Separation with Temperature Swing Adsorption

A process for component separation in a polymer production system, comprising (a) separating a polymerization product stream into a gas stream and a polymer stream, (b) contacting the polymer stream with a purge gas to yield a purged polymer and a spent purge gas comprising purge gas, ethylene, and ethane, (c) contacting the spent purge gas with a temperature swing adsorber contactor (TSAC) to yield a loaded TSAC, wherein at least a portion of the ethylene is adsorbed by the TSAC at a first temperature to yield TSAC-adsorbed ethylene, wherein a portion of the ethane is adsorbed by the TSAC at the first temperature to yield TSAC-adsorbed ethane, (d) heating the loaded TSAC to a second temperature to yield a regenerated TSAC, and (e) contacting the regenerated TSAC with a sweeping gas stream to yield a recovered adsorbed gas stream comprising sweeping gas, recovered ethylene and recovered ethane. 1. A process for component separation in a polymer production system , comprising:(a) separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises unreacted ethylene monomer, optional unreacted comonomer, and ethane;(b) processing at least a portion of the gas stream in one or more distillation columns to form a light hydrocarbon stream comprising ethylene and ethane;(c) contacting at least a portion of the light hydrocarbon stream with a temperature swing adsorber contactor (TSAC) to yield a loaded TSAC and a non-adsorbed gas stream, wherein at least a portion of the ethylene is adsorbed by the TSAC at a first temperature to yield TSAC-adsorbed ethylene, wherein a portion of the ethane is adsorbed by the TSAC at the first temperature to yield TSAC-adsorbed ethane, wherein the loaded TSAC comprises TSAC-adsorbed ethylene and TSAC-adsorbed ethane, and wherein the TSAC is characterized by an adsorption selectivity of ethylene versus ethane at the first temperature of equal to or greater than about 5;(d) heating at least a ...

Separations With Ionic Liquid Solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit. 1. A method comprising:providing a process stream comprising an olefin;capturing at least a portion of the olefin from the process stream by an ionic liquid solvent; andrecovering at least a portion of a captured olefin from the ionic liquid solvent.2. The method of claim 1 , wherein the ionic liquid solvent comprises a cation and an anion; wherein the cation comprises an ethylmethylimidazolium cation claim 1 , a butylmethylimidazolium cation claim 1 , a butylmethylpyridinium cation claim 1 , or combinations thereof; wherein the anion comprises a bis(trifluoromethanesulfonyl)amide anion claim 1 , a hexafluorophosphate anion claim 1 , a trifluoromethanesulfonate anion claim 1 , a dicyanamide anion claim 1 , a tetrafluoroborate anion claim 1 , a thiocyanate anion claim 1 , a nitrate anion claim 1 , a sulfonate anion claim 1 , a methylsulfate anion claim 1 , or combinations thereof.3. The method of claim 1 , wherein the ionic liquid solvent comprises a Ag(I) salt claim 1 , a Cu(I) salt claim 1 , or combinations thereof.4. The method of claim 3 , wherein the Ag(I) salt comprises silver(I) bis(trifluoromethanesulfonyl)amide claim 3 , silver(I) trifluoromethanesulfonate claim 3 , silver(I) nitrate claim 3 , or combinations thereof.5. The method of claim 3 , wherein the Cu(I) salt comprises ...

Separations With Ionic Liquid Solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit. 1. A method comprising:providing a process stream comprising an olefin;capturing at least a portion of the olefin from the process stream by an ionic liquid solvent; andrecovering at least a portion of a captured olefin from the ionic liquid solvent,{'sub': '2', 'wherein the ionic liquid solvent has a total solubility of the olefin greater than the total solubility of the olefin in [emim][TfN]-Ag.'}2. The method of claim 1 , wherein the ionic liquid solvent comprises a cation and an anion;wherein the cation comprises a butylethylimidazolium cation, a butylmethylimidazolium cation, butyldimethylimidazolium cation, decaethylimidazolium cation, a decamethylimidazolium cation, a diethylimidazolium cation, dimethylimidazolium cation, an ethyl-2,4-dimethylimidazolium cation, an ethyldimethylimidazolium cation, an ethylimidazolium cation, an ethylmethylimidazolium cation, an ethylpropylimidazolium cation, an ethoxyethylmethylimidazolium cation, an ethoxydimethylimidazolium cation, a hexadecylmethylimidazolium cation, a heptylmethylimidazolium cation, a hexylethylimidazolium cation, a hexylmethylimidazolium cation, a hexyldimethylimidazolium cation, a methoxyethylmethylimidazolium cation, a methoxypropylmethylimidazolium cation, a methylimidazolium cation, dimethylimidazolium cation, a ...

Hydrocarbon Recovery with Pressure Swing Adsorption

A process for component separation in a polymer production system comprising: (a) separating a polymerization product into a gas stream and a polymer stream; (b) processing the gas stream in distillation columns to yield a light hydrocarbon stream (LHS) comprising ethylene and ethane; (c) contacting LHS with a purged hydrocarbon adsorber to yield a loaded hydrocarbon adsorber and a non-adsorbed gas stream, wherein ethane is adsorbed by the purged hydrocarbon adsorber at a first pressure to yield adsorbed ethane, and wherein the non-adsorbed gas stream comprises recovered ethylene; (d) contacting the loaded hydrocarbon adsorber with a sweeping gas stream at a second pressure to yield an unloaded hydrocarbon adsorber and a recovered adsorbed gas stream comprising the sweeping gas stream and desorbed ethane; and (e) contacting the unloaded hydrocarbon adsorber with the sweeping gas stream at the first pressure to yield the purged hydrocarbon adsorber and a spent sweeping gas.

Component Separations in Polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof. 1. A system comprising:a first polymerization reactor for polymerizing olefin monomers to yield a mid-polymerization product stream;a separator for separating the mid-polymerization product stream into a mid-gas stream and a mid-polymer stream; anda second polymerization reactor for polymerizing the mid-polymer stream,wherein the mid-gas stream comprises ethane, unreacted ethylene, and hydrogen.2. The system of claim 1 , wherein the separator comprises a flash tank for reducing a pressure of the mid-polymerization product stream so as to flash ethane claim 1 , unreacted ethylene; hydrogen claim 1 , or combinations thereof.3. The system of claim 1 , wherein the mid-polymerization product stream comprises hydrogen claim 1 , ethane claim 1 , unreacted ethylene claim 1 , isobutane claim 1 , and polyethylene; and wherein the mid-polymer stream comprises polyethylene and isobutane.4. The system of claim 1 , further comprising:an absorption reactor for contacting the mid-gas stream with an absorption solvent system to absorb at least a portion of the unreacted ethylene from the mid-gas stream and to yield ethane in a waste gas stream.5. The system of claim 4 , further comprising:a processing device to receive ethane from the absorption reactor and to convert ethane ...

Component Separations in Polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof. 1. A process for component separation in a polymer production system , comprising:polymerizing olefin monomers in a first polymerization reactor to yield a mid-polymerization product stream;flashing, in a flash tank, the mid-polymerization product stream to yield a mid-polymer stream;distilling a vapor stream recovered from the flash tank to yield a mid-gas stream; andpolymerizing the mid-polymer stream in a second polymerization reactor,wherein the mid-polymerization product stream comprises hydrogen, ethane, unreacted ethylene, isobutane, and polyethylene,wherein the mid-polymer stream comprises the polyethylene and the isobutane, andwherein the mid-gas stream comprises the unreacted ethylene and the ethane.2. The process of claim 1 , wherein the vapor stream comprises hydrogen claim 1 , ethane claim 1 , unreacted ethylene claim 1 , and optionally unreacted comonomer.3. The process of claim 1 , wherein the mid-polymerization product stream further comprises unreacted comonomer.4. The process of claim 1 , wherein the mid-gas stream further comprises unreacted comonomer.5. The process of claim 1 , further comprising:contacting the mid-gas stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the mid-gas stream is ...

Component Separations in Polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof. 1. A process for component separation in a polymer production system , comprising:separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene;distilling the gas stream into a light hydrocarbon stream and a side stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, wherein the side stream comprises isobutane;contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system; andrecovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.2. The process of claim 1 , further comprising:regenerating the absorption solvent system to yield recovered ethylene.3. The process of claim 1 , further comprising:processing the waste gas stream in a processing device.4. The process of claim 3 , wherein the processing device comprises a cracker claim 3 , catalytic cracker claim 3 , scrubber claim 3 , converter claim 3 , treater claim 3 , dehydrogenator claim 3 , deoxygenator claim 3 , flare or combinations thereof.5. The process of ...

System and Method for Rapid Dump Tank Heating

A method of operating a dump tank of a polymer production process by transferring all or a portion of a content of a polymerization reactor into the dump tank, wherein the reactor contents comprise solid polymer, and liquid and gaseous non-product components, and removing at least a portion of the liquid and gaseous non-product components from the dump tank by: reducing a pressure of the dump tank, subjecting the solid polymer to a first cleaning stage comprising heating the solid polymer by introducing a first heated treatment gas into the dump tank, and subjecting the solid polymer to a second cleaning stage comprising purging the solid polymer by introducing a second heated treatment gas into the dump tank. 1. A method of operating a dump tank of a polymer production process , the method comprising:transferring all or a portion of a content of a polymerization reactor into the dump tank, wherein the reactor contents comprise solid polymer, and liquid and gaseous non-product components; and reducing a pressure of the dump tank, whereby a flash gas comprising a first portion of the at least a portion of the liquid and gaseous non-product components is recovered from the dump tank;', 'subjecting the solid polymer to a first cleaning stage comprising heating the solid polymer by introducing a first heated treatment gas comprising primarily one or more hydrocarbons into the dump tank until a first cleaning stage temperature of the solid polymer is attained and recovering a first gas comprising at least a portion of the first heated treatment gas and a second portion of the at least a portion of the liquid and gaseous non-product components from the dump tank during the first cleaning stage; and', 'removing a portion of the one or more hydrocarbons from the first gas to yield recovered hydrocarbons and a treated first gas., 'removing at least a portion of the liquid and gaseous non-product components from the dump tank by2. The method of further comprising recycling a ...

Component Separations in Polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof. 1. A process for component separation in a polymer production system , comprising:separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene;distilling the gas stream into a light hydrocarbon stream and a bottoms stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, and wherein the bottoms stream comprises isobutane;contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system; andrecovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.2. The process of claim 1 , further comprising:regenerating the absorption solvent system to yield recovered ethylene.3. The process of claim 1 , further comprising:processing the waste gas stream in a processing device.4. The process of claim 3 , wherein the processing device comprises a cracker claim 3 , catalytic cracker claim 3 , scrubber claim 3 , converter claim 3 , treater claim 3 , dehydrogenator claim 3 , deoxygenator claim 3 , flare or combinations thereof.5. The ...

Ethylene Recovery by Absorption

A process for recovery of ethylene from a polymerization product stream of a polyethylene production system, comprising separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein the contacting the light gas stream with the absorption solvent system occurs at a temperature in a range of from about 40° F. to about 110° F., wherein at least a portion of the unreacted ethylene from the light gas stream is absorbed by the absorption solvent system, and recovering unreacted ethylene from the absorption solvent system to yield recovered ethylene. 1. A process comprising:contacting ethylene and a polymerization catalyst in a first loop slurry reactor and in a second loop slurry reactor connected in series with the first loop slurry reactor, under suitable reaction conditions to yield a polymerization product stream flowing from the second loop slurry reactor, wherein the polymerization product stream comprises a bimodal polymer;separating a gas stream from the polymerization product stream, wherein the gas stream comprises unreacted ethylene and ethane;separating, using an absorption solvent system at a temperature in a range of from about 40° F. to about 110° F., at least one gaseous component from the gas stream to form a recycle stream comprising unreacted ethylene and a waste stream comprising ethane; andrecycling the unreacted ethylene of the recycle stream to the first loop slurry reactor, the second loop slurry reactor, or both the first loop slurry reactor and the second loop slurry reactor.2. The process of claim 1 , wherein the bimodal polymer comprises a high molecular weight polymer and a low molecular weight polymer.3. The process of claim 2 , wherein the high molecular weight polymer has a low density claim 2 , and wherein the low molecular weight polymer has a high density.4. The process of claim 1 , ...

Separations With Ionic Liquid Solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit. 1. A method comprising:providing a process stream comprising an olefin;capturing at least a portion of the olefin from the process stream by an ionic liquid solvent; andrecovering at least a portion of a captured olefin from the ionic liquid solvent.2. The method of claim 1 , wherein the ionic liquid solvent comprises a cation and an anion; wherein the cation comprises an ethylmethylimidazolium cation claim 1 , a butylmethylimidazolium cation claim 1 , a butylmethylpyridinium cation claim 1 , or combinations thereof; wherein the anion comprises a bis(trifluoromethanesulfonyl)amide anion claim 1 , a hexafluorophosphate anion claim 1 , a trifluoromethanesulfonate anion claim 1 , a dicyanamide anion claim 1 , a tetrafluoroborate anion claim 1 , a thiocyanate anion claim 1 , a nitrate anion claim 1 , a sulfonate anion claim 1 , a methylsulfate anion claim 1 , or combinations thereof.3. The method of claim 1 , wherein the ionic liquid solvent comprises a Ag(I) salt claim 1 , a Cu(I) salt claim 1 , or combinations thereof.4. The method of claim 3 , wherein the Ag(I) salt comprises silver(I) bis(trifluoromethanesulfonyl)amide claim 3 , silver(I) trifluoromethanesulfonate claim 3 , silver(I) nitrate claim 3 , or combinations thereof.5. The method of claim 3 , wherein the Cu(I) salt comprises ...

System and Method for Rapid Dump Tank Heating

A method of operating a dump tank of a polymer production process by transferring all or a portion of a content of a polymerization reactor into the dump tank, wherein the reactor contents comprise solid polymer, and liquid and gaseous non-product components, and removing at least a portion of the liquid and gaseous non-product components from the dump tank by: reducing a pressure of the dump tank, subjecting the solid polymer to a first cleaning stage comprising heating the solid polymer by introducing a first heated treatment gas into the dump tank, and subjecting the solid polymer to a second cleaning stage comprising purging the solid polymer by introducing a second heated treatment gas into the dump tank. 1. A method of operating a dump tank of a polymer production process , the method comprising:transferring all or a portion of a content of a polymerization reactor into the dump tank, wherein the reactor contents comprise solid polymer, and liquid and gaseous non-product components; and reducing a pressure of the dump tank, whereby a flash gas comprising a first portion of the at least a portion of the liquid and gaseous non-product components is recovered from the dump tank;', 'subjecting the solid polymer to a first cleaning stage comprising heating the solid polymer by introducing a first heated treatment gas comprising primarily one or more hydrocarbons into the dump tank until a first cleaning stage temperature of the solid polymer is attained and recovering a first gas comprising a second portion of the at least a portion of the liquid and gaseous non-product components from the dump tank during the first cleaning stage; and', 'subjecting the solid polymer to a second cleaning stage comprising purging the solid polymer by introducing a second heated treatment gas comprising primarily nitrogen into the dump tank and recovering a second gas comprising a third portion of the at least a portion of the liquid and gaseous non-product components from the dump ...

Component separations in polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.

Component separations in polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.

Ethylene recovery by absorption

A process for recovery of ethylene from a polymerization product stream of a polyethylene production system, comprising separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein the contacting the light gas stream with the absorption solvent system occurs at a temperature in a range of from about 40° F. to about 110° F., wherein at least a portion of the unreacted ethylene from the light gas stream is absorbed by the absorption solvent system, and recovering unreacted ethylene from the absorption solvent system to yield recovered ethylene.

Component separations in polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.

Component separations in polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.

Ethylene recovery by absorption

A process for recovery of ethylene from a polymerization product stream of a polyethylene production system, comprising separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein the contacting the light gas stream with the absorption solvent system occurs at a temperature in a range of from about 40° F. to about 110° F., wherein at least a portion of the unreacted ethylene from the light gas stream is absorbed by the absorption solvent system, and recovering unreacted ethylene from the absorption solvent system to yield recovered ethylene.

Component separations in polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.

Ethylene recovery by absorption

A process for recovery of ethylene from a polymerization product stream of a polyethylene production system, comprising separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein the contacting the light gas stream with the absorption solvent system occurs at a temperature in a range of from about 40° F. to about 110° F., wherein at least a portion of the unreacted ethylene from the light gas stream is absorbed by the absorption solvent system, and recovering unreacted ethylene from the absorption solvent system to yield recovered ethylene.

Component separations in polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.

Ethylene separation with pressure swing adsorption

A process for component separation in a polymer production system comprising: (a) separating a polymerization product into a gas stream and a polymer stream; (b) processing the gas stream in distillation columns to yield a light hydrocarbon stream (LHS) comprising ethylene and ethane; (c) contacting LHS with a purged hydrocarbon adsorber to yield a loaded hydrocarbon adsorber and a non-adsorbed gas stream, wherein ethane is adsorbed by the purged hydrocarbon adsorber at a first pressure to yield adsorbed ethane, and wherein the non-adsorbed gas stream comprises recovered ethylene; (d) contacting the loaded hydrocarbon adsorber with a sweeping gas stream at a second pressure to yield an unloaded hydrocarbon adsorber and a recovered adsorbed gas stream comprising the sweeping gas stream and desorbed ethane; and (e) contacting the unloaded hydrocarbon adsorber with the sweeping gas stream at the first pressure to yield the purged hydrocarbon adsorber and a spent sweeping gas.

Ethylene separation with pressure swing adsorption

Ethylene recovery by absorption

A process for recovery of ethylene from a polymerization product stream of a polyethylene production system, comprising separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein the contacting the light gas stream with the absorption solvent system occurs at a temperature in a range of from about 40° F to about 110° F, wherein at least a portion of the unreacted ethylene from the light gas stream is absorbed by the absorption solvent system, and recovering unreacted ethylene from the absorption solvent system to yield recovered ethylene.

Ethylene separation with pressure swing adsorption

Component separations in polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.

Component separations in polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.

Component separations in polymerization.

La presente invención se refiere a un proceso para la separación de componente en un sistema de producción de polímero, que comprende separar una corriente de producto de polimerización en una corriente de gas y una corriente de polímero, en donde la corriente de gas comprende etano y etileno sin reaccionar, destilar la corriente de gas en una corriente de hidrocarburo ligero, en donde la corriente de hidrocarburo ligero comprende etano y etileno sin reaccionar, poner en contacto la corriente de hidrocarburo ligero con un sistema de solvente de absorción, en donde al menos una porción del etileno sin reaccionar a partir de la corriente de hidrocarburo ligero es absorbida por el sistema de solvente de adsorción, y recuperar una corriente de gas residual a partir del sistema de solvente de adsorción, en donde la corriente de gas residual comprende etano, hidrógeno, o combinaciones de los mismos.

Component separations in polymerization

A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.

Ethylene recovery by absorption.

La presente invención se refiere a un proceso para la recuperación de etileno a partir de una corriente de producto de polimerización de un sistema de producción de polietileno, que comprende separar una corriente de gas ligero a partir de la corriente de producto de polimerización, en donde la corriente de gas ligero comprende etano y etano sin reaccionar, poner en contacto la corriente de gas ligero con un sistema de solvente de absorción, en donde el contacto de la corriente de gas ligero con el sistema de solvente de absorción ocurre a una temperatura en un intervalo desde aproximadamente 4.44°C (40°F) hasta aproximadamente 43.44°C (110°F), en donde al menos una porción del etileno sin reaccionar a partir de la corriente de gas ligero es absorbida por el sistema de solvente de absorción, y recuperar el etileno sin reaccionar a partir del sistema de solvente de absorción para proporcionar etileno recuperado.

Ethylene recovery by absorption

A process for recovery of ethylene from a polymerization product stream of a polyethylene production system, comprising separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein the contacting the light gas stream with the absorption solvent system occurs at a temperature in a range of from about 40° F to about 110° F, wherein at least a portion of the unreacted ethylene from the light gas stream is absorbed by the absorption solvent system, and recovering unreacted ethylene from the absorption solvent system to yield recovered ethylene.

Ethylene separation with pressure swing adsorption

A process for component separation in a polymer production system comprising: (a) separating a polymerization product into a gas stream and a polymer stream; (b) processing the gas stream in distillation columns to yield a light hydrocarbon stream (LHS) comprising ethylene and ethane; (c) contacting LHS with a purged hydrocarbon adsorber to yield a loaded hydrocarbon adsorber and a non-adsorbed gas stream, wherein ethane is adsorbed by the purged hydrocarbon adsorber at a first pressure to yield adsorbed ethane, and wherein the non-adsorbed gas stream comprises recovered ethylene; (d) contacting the loaded hydrocarbon adsorber with a sweeping gas stream at a second pressure to yield an unloaded hydrocarbon adsorber and a recovered adsorbed gas stream comprising the sweeping gas stream and desorbed ethane; and (e) contacting the unloaded hydrocarbon adsorber with the sweeping gas stream at the first pressure to yield the purged hydrocarbon adsorber and a spent sweeping gas.

Ethylene separation with pressure swing adsorption.

La presente invención se refiere a un proceso para la separación de componente en un sistema de producción de polímero que comprende: (a) separar un producto de polimerización en una corriente de gas y una corriente de polímero; (b) procesar la corriente de gas en columnas de destilación para proporcionar una corriente de hidrocarburo ligero (LHS) que comprende etileno y etano; (c) poner en contacto la LHS con un adsorbedor de hidrocarburo purgado para proporcionar un adsorbedor de hidrocarburo cargado y una corriente de gas no adsorbido, en donde el etano es adsorbido por el adsorbedor de hidrocarburo purgado en una primera presión para proporcionar etano adsorbido, comprende etileno recuperado; (d) poner en contacto el adsorbedor de hidrocarburo cargado con una corriente de gas de barrido y etanol desorbido; y (e) poner en contacto el adsorbente de hidrocarburo cargado con la corriente de gas de barrido a una segunda presión para proporcionar un adsorbedor de hidrocarburo descargado y una corriente de gas adsorbido recuperado que comprende la corriente de gas de barrido y etano adesorbido; y (e) poner en contacto el adsorbedor de hidrocarburo descargado con la corriente de gas de barrido a la primera presión para proporcionar el adsorbedor de hidrocarburo descargado con la corriente de gas de barrido a la primera presión para proporcionar el adsorbedor de hidrocarburo purgado y un gas de barrido agotado.

ethylene separation with pressure swing adsorption

Ethylene separation with pressure swing adsorption

A process for component separation in a polymer production system comprising: (a) separating a polymerization product into a gas stream and a polymer stream; (b) processing the gas stream in distillation columns to yield a light hydrocarbon stream (LHS) comprising ethylene and ethane; (c) contacting LHS with a purged hydrocarbon adsorber to yield a loaded hydrocarbon adsorber and a non-adsorbed gas stream, wherein ethane is adsorbed by the purged hydrocarbon adsorber at a first pressure to yield adsorbed ethane, and wherein the non-adsorbed gas stream comprises recovered ethylene; (d) contacting the loaded hydrocarbon adsorber with a sweeping gas stream at a second pressure to yield an unloaded hydrocarbon adsorber and a recovered adsorbed gas stream comprising the sweeping gas stream and desorbed ethane; and (e) contacting the unloaded hydrocarbon adsorber with the sweeping gas stream at the first pressure to yield the purged hydrocarbon adsorber and a spent sweeping gas.

Separations with ionic liquid solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit.

Separations with ionic liquid solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit.

Separations with ionic liquid solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit.

Separations with ionic liquid solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit.

System and method for rapid dump tank heating

A method of operating a dump tank of a polymer production process by transferring all or a portion of a content of a polymerization reactor into the dump tank, wherein the reactor contents comprise solid polymer, and liquid and gaseous non-product components, and removing at least a portion of the liquid and gaseous non-product components from the dump tank by: reducing a pressure of the dump tank, subjecting the solid polymer to a first cleaning stage comprising heating the solid polymer by introducing a first heated treatment gas into the dump tank, and subjecting the solid polymer to a second cleaning stage comprising purging the solid polymer by introducing a second heated treatment gas into the dump tank.

Separations with ionic liquid solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit.

Separations with ionic liquid solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit.

Separations with ionic liquid solvents

Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit.

Systems and techniques for heating polymer reactor flashlines

A polyolefin reactor flashline heater system may include an enclosure, a heating section, and a transformer. The heating section is contained in the enclosure and extends between a first end and a second end. The first end is fluidically coupled to a polyolefin reactor product inlet. The second end is fluidically coupled to a heated product outlet. One or more pipe sections are coupled in series between the first end and the second end. The one or more pipe sections are formed of an electrically conducting material and have a predetermined diameter to transport a polyolefin reactor stream from the first end to the second end. The transformer is electrically coupled to the first end and the second end and configured to heat the heating section by impedance heating. A polymerization system may include a polyolefin reactor coupled to the polyolefin reactor flashline heater system.