| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 062630000 | Plural columns | 21 |
| 20080209942 | Process for recovering lower carbon olefins from product gas for production of olefins - The present invention concerns a process for recovering lower carbon olefins from MTO or DTO product gas. Said process primarily comprises the product gas compressing, pre-deethanizing, demethanizing and ethylene recovering apparatus, depropanizing column, ethylene rectification column, propylene rectification column and the like. In addition, the process of the present invention needs no independent ethylene cooling system, and the ethylene recovery rate may achieve 99.5%. | 09-04-2008 |
| 20090188279 | METHOD AND APPARATUS FOR TREATING A HYDROCARBON STREAM - The present invention relates to a method of treating a hydrocarbon stream such as a natural gas stream, the method at least comprising the steps of: (a) supplying a partially condensed feed stream ( | 07-30-2009 |
| 20100011810 | NGL Recovery Methods and Configurations - Contemplated plants and methods for NGL recovery from feed gases having a carbon dioxide content equal or greater than about 2% employ temperature control configurations that allow high-level and flexible recovery of ethane and heavier components while avoiding freezing of the carbon dioxide in the process. Where the feed gas has a significant fraction of C3+ components and moderate carbon dioxide content, a single column configuration with an intermediate reflux condenser may be used, while two-column configurations may be used for feed gases with high carbon dioxide content and relatively low C3+ component concentration. | 01-21-2010 |
| 20100199718 | Storage Enclosure, Method And Apparatus For Producing Carbon Monoxide And/Or Hydrogen By Means Of Cryogenic Separation, Including One Such Enclosure - A storage enclosure and an apparatus and method for producing carbon monoxide and/or hydrogen by means of cryogenic separation, including one such enclosure is provided. | 08-12-2010 |
| 20100206003 | Configurations And Methods For Improved Natural Gas Liquids Recovery - Contemplated plants for recovery of NGL from natural gas employ alternate reflux streams in a first column and a residue gas bypass stream, wherein expansion of various process streams provides substantially all of the refrigeration duty in the plant. Contemplated plants not only have flexible recovery of ethane between 2% and 90% while recovering at least 99% of propane, but also reduce and more typically eliminate the need for external refrigeration. | 08-19-2010 |
| 20110041551 | PROCESS FOR SEPARATING OFF NITROGEN - The invention relates to a process for separating off C | 02-24-2011 |
| 20110138854 | FRACTIONATION OF HYDROGEN SULFIDE RICH SOUR GAS AND METHODS OF USE - Methods and systems are provided for treating hydrogen sulfide rich sour gas through a series of fractionation columns. The processes disclosed herein and the variations thereof provide optimized processes for the removal of hydrogen sulfide from sour gas through the introduction of innovative azeotrope breakers, novel configurations of process equipment, and optimized operating conditions. Advantages of certain embodiments of the present invention include reduced equipment requirements, improved process efficiencies, reduced operating costs, and reduced capital costs. Other advantages include better process suitability to certain environmental conditions such as the arctic cold when compared to conventional amine treatment processes. | 06-16-2011 |
| 20110209499 | METHOD FOR REMOVING NITROGEN - A process is described for separating off a nitrogen-rich fraction from a feed fraction containing essentially nitrogen and hydrocarbons, wherein the feed fraction is separated by rectification into a nitrogen-rich fraction and a methane-rich fraction and wherein the methane-rich fraction for the purpose of cold generation is vaporized and superheated at a pressure as high as possible against the feed fraction which is to be cooled. | 09-01-2011 |
| 20110277500 | NITROGEN REMOVAL FROM NATURAL GAS - The invention relates to a method for the separation of a hydrocarbon-rich, nitrogen-containing feed fraction ( | 11-17-2011 |
| 20120067081 | Process And Plant For Recovering Argon In A Separation Unit For A Purge Gas Used In The Synthesis Of Ammonia - A plant for producing an argon-rich stream from a mixture formed by a purge fluid in an ammonia production plant comprises: at least one phase separator; a methane scrubbing column; a methane separation column; a nitrogen/argon separation column; a line for sending the mixture into at least one phase separator, to produce at least a hydrogen-enriched gas and a hydrogen-depleted liquid; a line for sending at least a portion of the hydrogen-depleted liquid into the bottom of the methane scrubbing column, to form an overhead gas and a bottoms liquid; a line for sending at least a portion of the bottoms liquid from the methane scrubbing column to the methane separation column, to produce a methane-enriched bottoms liquid and a methane-depleted overhead gas; a line for sending at least a portion of the methane-depleted overhead gas to the nitrogen/argon separation column, to form a nitrogen-enriched fluid as overhead of said column; a line for withdrawing an argon-rich liquid as bottoms of said column, serving as product; and a line for sending at least a portion of the methane-enriched bottoms liquid to the top of the methane scrubbing column. | 03-22-2012 |
| 20120324943 | Two Step Nitrogen and Methane Separation Process - A system and method for removing nitrogen and producing a high pressure methane product stream from natural gas feed streams is disclosed. A system for also producing natural gas liquids in conjunction with nitrogen removal from natural gas feed streams is also disclosed. The system and method of the invention are particularly suitable for use with feed streams in excess of 50 MMSCFD and up to 750 MMSCFD and containing up to 75 ppm carbon dioxide. Typical power requirements for compressing the methane product stream to produce a suitably high pressure stream for sale are reduced according to the system and method of the invention. | 12-27-2012 |
| 20130213088 | Systems And Methods For Separating Hydrocarbons Using One Or More Dividing Wall Columns - Methods and systems for separating hydrocarbons using one or more dividing wall columns are provided. The method can include introducing a hydrocarbon fluid to a first dividing wall column. A first overhead comprising methane, ethane, or a combination thereof, a first intermediate comprising ethane, a second intermediate comprising ethane, and a first bottoms comprising one or more hydrocarbons having three or more carbon atoms per molecule can be recovered from the first dividing wall column. The first overhead can be introduced to a process for producing a liquefied natural gas. The first bottoms can be introduced to a second dividing wall column. A second overhead comprising propane, a third intermediate comprising butane, and a second bottoms comprising one or more hydrocarbons having five or more carbon atoms per molecule can be recovered from the second dividing wall column. The second overhead can be introduced to the process for producing a liquefied natural gas. | 08-22-2013 |
| 20140060114 | CONFIGURATIONS AND METHODS FOR OFFSHORE NGL RECOVERY - A natural gas two-column processing plant allows for recovery of at least 95% of C4 and heavier hydrocarbons, and about 60 to 80% of C3 hydrocarbons from a rich feed gas stream in which the first column (absorber) operates at a higher pressure than the second column, with the absorber receiving a compressed gas from the second column, and a turboexpander discharging a two-phase stream to the top of the absorber. Most typically, contemplated configurations and methods operate without the use of external refrigeration. | 03-06-2014 |
| 20140069142 | Two Step Nitrogen and Methane Separation Process - A system and method for removing nitrogen and producing a high pressure methane product stream from natural gas feed streams is disclosed. A system for also producing natural gas liquids in conjunction with nitrogen removal from natural gas feed streams is also disclosed. The system and method of the invention are particularly suitable for use with feed streams in excess of 50 MMSCFD and up to 750 MMSCFD and containing up to 75 ppm carbon dioxide. Typical power requirements for compressing the methane product stream to produce a suitably high pressure stream for sale are reduced according to the system and method of the invention. | 03-13-2014 |
| 20140075987 | CONFIGURATIONS AND METHODS FOR NGL RECOVERY FOR HIGH NITROGEN CONTENT FEED GASES - A low cost and efficient design is used to convert a propane recovery process based on low nitrogen content feed gas to an ethane recovery process based on a high nitrogen feed gas while achieving over 95 mole % ethane recovery while maintaining a 99% propane recovery, and achieved without additional equipment. | 03-20-2014 |
| 20140182331 | INTEGRATED PROCESS FOR NGL (NATURAL GAS LIQUIDS RECOVERY) AND LNG (LIQUEFACTION OF NATURAL GAS) - The invention relates to an integrated process and apparatus for liquefaction of natural gas and recovery of natural gas liquids. In particular, the improved process and apparatus reduces the energy consumption of a Liquefied Natural Gas (LNG) unit by using a portion of the already cooled overhead vapor from a fractionation column from an NGL (natural gas liquefaction) unit to, depending upon composition, provide, for example, reflux for fractionation in the NGL unit and/or a cold feed for the LNG unit, or by cooling, within the NGL unit, a residue gas originating from a fractionation column of the NGL unit and using the resultant cooled residue gas to, depending upon composition, provide, for example, reflux/feed for fractionation in the NGL and/or a cold feed for the LNG unit, thereby reducing the energy consumption of the LNG unit and rendering the process more energy-efficient. | 07-03-2014 |
| 20140238076 | NITROGEN REJECTION UNIT - Methods and systems for removing nitrogen during liquefaction of natural are provided. Methods of removing nitrogen include warming a predominantly methane stream in a methane cold box to provide a warmed predominantly methane stream; conducting at least a portion of the warmed predominantly methane stream from the methane cold box to a nitrogen removal unit comprising at least a first nitrogen removal column and a last nitrogen removal column, wherein the first nitrogen removal column is located upstream of the last nitrogen removal column; passing the warmed predominantly methane stream through the last nitrogen removal column to provide a refluxed warmed predominantly methane stream; and routing at least a portion of the refluxed warmed predominantly methane stream to the last nitrogen removal column. | 08-28-2014 |
| 20150143845 | DISTILLATION APPARATUS - A distillation apparatus includes a first distillation column and one or more second distillation columns. A higher-pressure part of the first distillation column includes at least part of a rectifying section, and performs gas-liquid contact at a relatively high pressure. A lower pressure-part of the first distillation column includes at least part of a stripping section and performs gas-liquid contact at a relatively low pressure. A vapor line, which includes a pressurizing means, directs a vapor discharged from a column top of the lower-pressure part to a column bottom of the higher-pressure part. A liquid line directs a liquid discharged from the column bottom of the higher-pressure part to the column top of the lower pressure part. Corresponding heat exchange structures transfer heat in both directions between the rectifying section of the first distillation column and at least one second distillation column. | 05-28-2015 |
| 20160187057 | LIQUEFIED NATURAL GAS FROM RICH NATURAL GAS - Rich natural gas is dried in a water scavenger unit, and then purified in a refluxed absorber. The refluxed stream for the absorber is a stream of predominantly methane condensed by cryogenic refrigeration. The refluxed absorber is operated below the critical point of methane, to allow condensation to occur. Liquefied natural gas is condensed in a cryogenic box, and then further cooled. Natural gas liquid from the refluxed absorber is stabilized for storage and transport. | 06-30-2016 |
| 062631000 | Recycle | 2 |
| 20090301132 | OPTIMIZED HEAVIES REMOVAL SYSTEM IN AN LNG FACILITY - An LNG facility employing an optimized heavies removal system. The optimized heavies removal system can comprise at least one distillation column and at least two separate heat exchangers. The heat exchangers can be operable to heat a liquid stream withdrawn from a distillation column to thereby provide predominantly vapor and/or liquid streams that can be reintroduced into the column. | 12-10-2009 |
| 20100043489 | Method For Separating A Mixture Of Carbon Monoxide, Methane, Hydrogen And Optionally Nitrogen by Cryogenic Distillation - A method for separating a mixture of carbon monoxide, methane, hydrogen and optionally nitrogen by cryogenic distillation is provided. | 02-25-2010 |
