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Jayant Kumar Gorawara

Vladislav Ivanov Kanazirev

Henry Rastelli

Charles P Luebke

Dean E Rende

Shain-Jer Doong

Dana K Sullivan

Deng-Yang Jan

Stanley Joseph Frey

Stephen W Sohn

Robert L Bedard

Lubo Zhou

Joseph Edward Zimmermann

Richard Russell Rosin

Gregory F Maher

Gregory J Thompson

Edward C Haun

Zheng Barton Wang

Pijus Kanti Roy

Kiran Bollapragada

Peter K Coughlin

Vasant P Thakkar

John Qianjun Chen

Laura Elise Leonard

David James Shecterle

James A Johnson

Soumendra Mohan Banerjee

Frank S Modica

Wugeng Liang

Dante A Simonetti

Daniel L Ellig

John Markovs

Debarshi Majumder

Jason L Noe

Stephen R Caskey

Nathan A Siedler

Bruce R Beadle

Rustam H Sethna

Thomas J Dangieri

James Robert Gaspar

John Louis Griffiths

Munish Kumar Sharma

Zheng Wang

A process for regenerating a temperature swing adsorption unit comprising: sending a heated purge gas stream through an adsorption bed to remove impurities from said adsorption bed and producing a contaminated stream; sending said contaminated stream to a separator to produce a liquid stream and a vapor stream; returning said vapor stream as at least a portion of said heated purge stream until said vapor stream comprises above a predetermined level of impurities; and purging a portion of said vapor stream until the heated purge stream has a level of impurities below a second predetermined level.

Thermal swing adsorption process with purification

A process is provided for removing contaminants from olefin containing Cstreams. The streams are contacted with an X based zeolite adsorbent comprising greater than 88% X zeolite at a SiO/AlOratio of less than 2.5 and an alkali metal salt present in excess of an amount required to achieve full exchange of cation sites on the X based zeolite. The resulting alkali oxide on a volatile free basis is less than 1% (by mass) of the X based adsorbent. The contaminants that are removed include sulfur, oxygenate, and nitrogen based contaminants.

Adsorbent for contaminant removal from C4 hydrocarbons

A process is presented for the removal of contaminants like sulfur compounds from hydrocarbons. The sulfur compounds are removed from hydrocarbons that may be a feed to cracking units. A feed stream is treated with a clinoptilolite or a barium exchanged zeolite adsorbent to effectively remove carbon disulfides from the feed hydrocarbon. The adsorbent may be regenerated by a hydrogen stream, a hydrocarbon stream or a mixture thereof.

Process for removing sulfur compounds from hydrocarbon streams

Copper adsorbents which are resistant to the reduction by the components of the synthesis gas at normal operation conditions. The adsorbents are produced by admixing small amounts of an inorganic halide, such as NaCl, to the basic copper carbonate precursor followed by calcination at a temperature sufficient to decompose the carbonate. The introduction of the halide can be also achieved during the forming stage of adsorbent preparation. These reduction resistant copper oxides can be in the form of composites with alumina and are especially useful for purification of synthesis gas and the removal of mercury, arsine, phosphine, as well as hydrogen sulfide.

Copper adsorbent for gas purification

This present disclosure relates to processes for removing contaminants from hydrocarbon streams, e.g. removing chlorides, CO, COS, HS, AsH, methanol, mercaptans and other S- or O-containing organic compounds from olefins, paraffins, aromatics, naphthenes and other hydrocarbon streams. The process involves contacting the stream with an adsorbent which comprises a zeolite, an alumina component and a metal component e.g. sodium, in an amount at least 30% of the zeolite's ion exchange capacity.

Process for purifying hydrocarbon streams using low reactivity adsorbents

A process is presented for the removal of contaminants like oxygenates from hydrocarbons. The contaminant oxygenates are removed from hydrocarbons that may be feed to cracking units. A crude feed stream is fed to a water wash column along with water to remove oxygenates and is subsequently treated with an adsorbent to effectively remove all the oxygenates from the crude hydrocarbon. A regenerant medium from a naphtha hydrotreating unit is used to regenerate the adsorbent.

Process for removing oxygenates from naphtha

A process is presented for the purification of an olefins feed stream to a benzene alkylation unit. The process removes heavy aromatics in an adsorbent system comprising at least two adsorbent units. The unit passes the olefins feed stream to a first adsorbent unit, while the second adsorbent unit is either in regeneration mode, or standby mode. The process switches the feed stream to the second adsorbent unit and displaces the fluid in the second adsorbent unit, while maintaining the flow of the purified feed stream to the benzene alkylation unit.

Two-bed paraffin to olefin enhancement process

A process is presented for the purification of an olefins feed stream to a benzene alkylation unit. The process removes heavy aromatics in a two adsorbent unit system. The unit passes the olefins feed stream to a first adsorbent unit, while the second adsorbent unit is either in regeneration mode, or standby mode. The process switches the feed stream to the second adsorbent unit and displaces the fluid in the second adsorbent unit, while maintaining the flow of the purified feed stream to the benzene alkylation unit.

Methods for operating an adsorption separation zone are described. A trim bed is used with two adsorption beds in a swing bed arrangement. The trim bed will catch small amounts of treated feed remaining in the adsorption bed during the switch over from the spent adsorption bed to the fresh adsorption bed. In addition, any adsorbed material that desorbs from the spent adsorption bed during the displacement step of regeneration would be adsorbed onto the trim bed.

Trim bed for adsorption separation zone

A process for the providing a regenerant gas stream for a regenerable adsorbent used to remove water and hydrogen sulfide from a reactor effluent in a catalytic dehydrogenation process is described. The reactor effluent is compressed in a compressor to provide a compressed effluent. The compressed effluent may be treated to remove chlorides, and then passed to a dryer zone having a regenerable adsorbent. A regenerant gas stream is used to desorb the water and hydrogen sulfide and the spent regenerant stream may be passed to a cleaning zone having a sorbent configured to remove hydrogen sulfide from the spent regenerant stream. The cleaned regenerant gas stream may be recycled to the dryer zone to desorb and/or regenerate the regenerable adsorbent.

Processes for removing contaminants from a dehydrogenation effluent

A process for removal of trace chloride contaminants from a reactor effluent in a catalytic dehydrogenation process is described. The reactor effluent is compressed in a compressor to provide a compressed effluent. The compressed effluent is introduced from the compressor into a chloride treater. In the chloride treater, trace chloride contaminants in the compressed effluent are adsorbed to provide a treated effluent. The treated effluent is cooled in a cooler.

Process for high temperature removal of trace chloride contaminants in a catalytic dehydrogenation process

The invention relates to a process for removing and recovering mercury, an impurity, from a hydrocarbon feedstream containing oxygen, such as introduced during hydraulic fracturing. Mercury is selectively removed to very low levels of concentration from fluid streams such as natural gas, cracked gas, hydrogen or naphtha by passage of the stream through an adsorbent bed containing particles of a zeolitic molecular sieve preferably having pore diameters of at least 3.0 angstroms and in which the zeolite crystallites are formed into an aggregate (cylindrical or beads) which contain ionic or elemental silver. These adsorbent particles maintain their capacity for removal of mercury despite the presence of oxygen.

Process for the removal of mercury from hydrocarbon streams containing oxygen

A process for the removal of sulfur compounds from a feed stream. A first separation zone removes sulfur compounds and produces a partially cleaned stream. A first adsorption zone adsorbs the remaining organic sulfur compounds on a regenerable adsorbent a produces a treated gas stream. A portion of the treated gas stream may regenerate the adsorbent in the first adsorption zone by removing organic sulfur compounds. The organic sulfur compound rich stream can be passed to a non-regenerable adsorption zone. The non-regenerable adsorption zone will separate out the organic sulfur compounds and provide a re-treated gas stream which may be recycled to a portion of the process. The non-regenerable adsorption zone may include regenerable adsorbent, but the zone is not operated to regenerate the adsorbent while it is in the non-regenerable adsorption zone.

Process for removing sulfur compounds from natural gas streams

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Buffalo Grove, IL, United States of America

Jayant Kumar Gorawara