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7610775 |
Distillation process using microchannel technology
The disclosed invention relates to a distillation process for separating two or more components having different volatilities from a liquid mixture containing the components. The process employs...
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7437891 |
Recovery and purification of ethylene
A process for the recovery and purification of ethylene and optionally propylene from a stream containing lighter and heavier components that employs an ethylene distributor column and a partially...
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7305850 |
Distillation process using microchannel technology
The disclosed invention relates to a process for distilling a fluid mixture in a microchannel distillation unit, the microchannel distillation unit comprising a plurality of microchannel...
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7185514 |
Method and installation for fractionating gas derived from pyrolysis of hydrocarbons
The invention relates to a method for fractionating a gas produced by the pyrolysis of hydrocarbons ( 1 ) for the recovery of C 2 and higher hydrocarbons, in particular ethylene and ethane,...
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7100399 |
Enhanced operation of LNG facility equipped with refluxed heavies removal column
Improved methodology for starting up a LNG facility employing a refluxed heavies removal column. The improved methodology involves varying the temperature of the feed to the heavies removal column...
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6978638 |
Nitrogen rejection from condensed natural gas
Method for the rejection of nitrogen from condensed natural gas which comprises (a) introducing the condensed natural gas into a distillation column at a first location therein, withdrawing a...
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6925837 |
Enhanced operation of LNG facility equipped with refluxed heavies removal column
Improved methodology for starting up a LNG facility employing a refluxed heavies removal column. The improved methodology involves varying the temperature of the feed to the heavies removal column...
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6923016 |
Refrigeration cycle apparatus
In a refrigerant cycle apparatus, an energy-saving operation is performed by using a refrigerant which is used in a supercritical state. A refrigeration cycle apparatus is constituted by a main...
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6564580 |
Process for recovering ethane and heavier hydrocarbons from methane-rich pressurized liquid mixture
The invention is an absorption process for recovering C 2+ components from a pressurized liquid mixture comprising C 1 and C 2+ . The pressurized liquid mixture is at least partially vaporized by...
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6560989 |
Separation of hydrogen-hydrocarbon gas mixtures using closed-loop gas expander refrigeration
A method for the recovery of hydrogen and one or more hydrocarbons having one or more carbon atoms from a feed gas containing hydrogen and the one or more hydrocarbons, which process comprises...
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6539747 |
Process of manufacturing pressurized liquid natural gas containing heavy hydrocarbons
The invention relates to a process of manufacturing a pressurized multi-component liquid from a pressurized, multi-component stream, such as natural gas, which contains C 5+ components and at...
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6513338 |
Refrigerant mixture for a mixture-throttling process
A refrigerant mixture for a mixture throttle process contains from 0.06 mol/mol to 0.20 mol/mol propane, from 0.26 mol/mol to 0.36 mol/mol nitrogen and from 0.20 mol/mol to 0.38 mol/mol methane,...
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6401486 |
Enhanced NGL recovery utilizing refrigeration and reflux from LNG plants
The present invention is directed to methods and apparatus for improving the recovery of the relatively less volatile components from a methane-rich gas feed under pressure to produce an NGL...
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6363744 |
Hydrocarbon separation process and apparatus
A process is described for separating the heavier hydrocarbons from a gaseous hydrocarbon feed wherein a first separator is employed to separate partially condensed gaseous feed and wherein the...
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6334334 |
Process for liquefying a hydrocarbon-rich stream
In the liquefaction of a hydrocarbon by indirect heat exchange with the refrigerant mixture of a refrigerant mixture cycle, the refrigerant mixture being compressed in multiple stages, the...
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6286335 |
Processes for multicomponent separation
An efficient and easier to operate distillation process separates mixtures containing three of more components into streams enriched in one of the components. The invention converts a two-way...
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6266977 |
Nitrogen refrigerated process for the recovery of C2+ Hydrocarbons
C 2 and C 3 hydrocarbons, particularly ethylene and propylene, are recovered from refinery or petrochemical plant gas mixtures by cooling and fractionating a feed gas mixture containing these...
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6223558 |
Method of refrigeration purification and power generation of industrial waste gas and the apparatus therefor
This invention relates to a method of refrigeration purification and power generation of industrial gas and apparatus therefor. The apparatus is comprised of two parts, the front part of which is...
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6192705 |
Reliquefaction of pressurized boil-off from pressurized liquid natural gas
A process is disclosed for reliquefying boil-off gas produced by pressurized liquid natural gas. In this process, refrigeration duty is provided to a heat exchanger by means of a refrigeration...
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6158241 |
LPG recovery from reformer treat gas
LPG and gasoline are recovered from catalytic reformer plant treat gas and net gas by refrigeration-induced condensation and separation, using reformer plant waste heat to produce the refrigeration...
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5983665 |
Production of refrigerated liquid methane
A high purity methane product is recovered from a feed gas mixture containing methane and one or more hydrocarbons heavier than methane by cooling, condensing, and rectifying the feed in a...
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5956971 |
Process for liquefying a natural gas stream containing at least one freezable component
This invention relates to a process for producing pressurized liquid rich in methane from a multi-component feed stream containing methane and a freezable component having a relative volatility...
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5950453 |
Multi-component refrigeration process for liquefaction of natural gas
This invention relates to a process for liquefying a pressurized gas stream rich in methane in which the liquefication of the gas stream occurs in a heat exchanger being cooled by a closed-loop...
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5924306 |
Method for demethanizing gas mixtures
A method for gas mixture demethanization is suitable for decreasing the loss of the target product (ethylene) and power requirements for gas mixture demethanization process. The gas mixture...
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5832746 |
Ultra-high purity nitrogen trifluoride production method, and unit therefor
An ultra-high purity nitrogen trifluoride production method comprises: pressurizing a nitrogen trifluoride feed gas, eliminating moisture and carbon dioxide from the feed gas, and cooling down the...
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5749245 |
Refrigerant separation system
The present invention relates to a system for separating a mixture containing at least two components, each component having a different volatility. The separation is achieved through the use of a...
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5701761 |
Method and installation for the liquefaction of natural gas
A pressurized natural gas is liquefied through at least one cooling cycle, in which a mixture of cooling fluids is used, comprising at least the following steps: a) at least some of the said...
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5657643 |
Closed loop single mixed refrigerant process
An improved closed loop single mixed refrigerant process and system for cooling a fluid material through a temperature range exceeding 200° F. by heat exchange with a single mixed refrigerant in a...
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5626034 |
Mixed refrigerants in ethylene recovery
The present invention is a process of high efficiency rectification zone separation of cracked or other ethylene-containing gas chilled primarily by two closed mixed refrigerant loops and at least...
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5600969 |
Process and apparatus to produce a small scale LNG stream from an existing NGL expander plant demethanizer
This invention concerns a novel process and apparatus for producing relatively small quantities of liquefied natural gas (LNG) by processing a side stream at a conventional NGL expander gas plant.
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5588306 |
Process for obtaining an ethane-rich fraction for refilling an ethane-containing refrigerant circuit of a process for liquefaction of a hydrocarbon-rich fraction
An ethane-rich fraction for refilling the refrigerant circuit, using an ethane-containing refrigerant in a process for liquefaction of a hydrocarbon-rich fraction, is obtained by removing a partial...
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5566555 |
Vapor recovery system with refrigeration and regeneration cycles
A vapor recovery system is provided which includes a vapor recovery cycle and a regeneration cycle. The vapor recovery is condensation of the vapors in an air-vapor mixture utilizing a chiller...
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5502972 |
Mixed refrigerant cycle for ethylene recovery
A closed-loop mixed refrigerant cycle provides efficient low-level refrigeration for recovering ethylene from a mixed gas feed. Compressed mixed refrigerant vapor is condensed at -20° F. to -50°...
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5502971 |
Low pressure recovery of olefins from refinery offgases
A low pressure cryogenic process is disclosed for recovering C 2 and heavier hydrocarbons and particularly olefins from a refinery offgas containing hydrogen, methane, nitrogen oxide in addition...
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5339641 |
Cryogenic liquid nitrogen production system
A system for producing liquid nitrogen from a nitrogen-containing hydrocarbon stream wherein excess refrigeration existing in a nitrogen rejection unit or in an integrated nitrogen rejection...
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5295356 |
Process and apparatus for the production of carbon monoxide and hydrogen
The heating and/or the cooling of the three columns is ensured by a closed nitrogen cycle. Carbon monoxide is withdrawn in liquid form from the third column, then is brought through a pump at the...
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5114451 |
Liquefied natural gas processing
A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbons from a liquefied natural gas (LNG) stream is disclosed. At least a portion of the LNG feed stream is...
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5090977 |
Sequence for separating propylene from cracked gases
A process sequence for treating cracked gases of heavy feedstocks which preferentially produces propylene to the exclusion of propane, butanes and butenes. The process eliminates the need for a...
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4987744 |
Cryogenic distillation with unbalanced heat pump
A cryogenic distillation system wherein a first heat exchange fluid transfers heat in part from a process stream to the bottom of a column, and in part from a process stream to a second heat...
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4778498 |
Process to produce high pressure methane gas
A process to produce methane gas product with reduced product compression requirements comprising pumping liquid methane from a cryogenic nitrogen rejection plant to a high pressure thereby...
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4767428 |
Nitrogen removal system
A process for separating a nitrogen rich hydrocarbon stream is disclosed. The process includes cooling the stream in a series of indirect heat exchanges to separate successively lighter components...
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4738699 |
Process for recovering ethane, propane and heavier hydrocarbons from a natural gas stream
A process for economically recovering ethane, propane and heavier hydrocarbon components from methane and lighter constituents of natural gas streams is disclosed. The separation process of the...
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4734115 |
Low pressure process for C.sub.3.sup.+ liquids recovery from process product gas
The invention provides a liquids recovery process useful for the separation and recovery of C 3 + liquid hydrocarbons from gas mixtures containing high concentrations of lighter components such as...
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4662919 |
Nitrogen rejection fractionation system for variable nitrogen content natural gas
The present invention is directed to a gas separation system for separating or rejecting nitrogen from a natural gas feed containing nitrogen, over a wide range of nitrogen concentrations, under...
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4608068 |
Recovery of C.sub.3+ hydrocarbons
In the recovery of C 3 + hydrocarbons from a feed stream containing hydrogen and C 1 to at least C 5 hydrocarbons, e.g., a refinery waste gas, comprising cooling and partially condensing the feed...
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4592767 |
Process for separating methane and nitrogen
A process for the separation of methane and nitrogen in a cryogenic distillation column driven by a closed loop recirculating fluid heat pump wherein additional column refrigeration is generated by...
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4582517 |
Separation of ethane and higher hydrocarbons from natural gas
Ethane and higher hydrocarbons are separated by rectification from natural gas under elevated pressure. To obtain higher ethane yields, even for gases poor in ethane, an open mixture cycle with...
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4526596 |
Process for recovering butane and propane from crude gas
In a process for recovering or fractionating a mixture composed mainly of butane and propane and present in a crude gas, using an external mechanical cooling loop, the mixture itself constitutes...
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4504295 |
Nitrogen rejection from natural gas integrated with NGL recovery
A process is set forth for the recovery of methane, nitrogen and natural gas liquids (C 2 +) from a natural gas feed stream wherein the recovery can be made at high pressure by the integration of a...
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4501600 |
Process to separate nitrogen from natural gas
A cryogenic process to more efficiently separate nitrogen from a nitrogen-containing hydrocarbon stream wherein the separate recovery of natural gas liquids is increased and the final nitrogen...
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