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Class 585/831 - Cyclic sorbate


Subclass of Class 585 - Chemistry of hydrocarbon compounds
Definition: Subject matter in which an aromatic or alicyclic hydrocarbon
No. of patents: 56
Last issue date: 11/28/2006


1    
NumberTitleIssue Date
7141631Non-conjugated cyclic diene, non-conjugated cyclic diene composition and method of producing polymer based on non-conjugated cyclic diene
It is an object of the present invention to provide a non-conjugated cyclic diene and a non-conjugated cyclic diene composition which enable the production of a polymer based on non-conjugated cyclic diene which makes it possible to produce a (co)polymer at a high d...
11/28/2006
7102044Process for removal of oxygenates from a paraffin stream
The present invention comprises a process for removal of oxygenates from a paraffin-rich or olefin-rich paraffin stream which comprises passing a feed stream, comprising one or more C10 to C15 feed paraffins or C10 to C15 ...
09/05/2006
7041616Enhanced selectivity of zeolites by controlled carbon deposition
A method for carbonizing a zeolite comprises depositing a carbon coating on the zeolite pores by flowing an inert carrier gas stream containing isoprene through a regenerated zeolite at elevated temperature. The carbonized zeolite is useful for the separation of lig...
05/09/2006
6924406Process for separating mixtures of hydrocarbon isomers in gas phase on molecular sieves
A process for separating mixtures of hydrocarbon isomers on molecular sieves, including providing columns which include molecular sieves and function alternatively as secondary adsorption, primary adsorption, and desorption devices, feeding the mixtures of hydrocarb...
08/02/2005
6784334Process for separating multibranched paraffins using a zeolitic adsorbent with a mixed structure
A process for separating multibranched paraffins comprised in a hydrocarbon feed comprising hydrocarbons containing 5 to 8 carbon atoms per molecule comprises a separation unit functioning by adsorption and contains at least one zeolitic adsorbent with a mixed struc...
08/31/2004
6696615Method of separating polycyclic aromatic hydrocarbons by means of chromatography
The invention relates to an effective method of separating polycyclic aromatic hydrocarbons by means of a chromatographic separation method. This is achieved by using, according to the invention, calixarene-modified separation phases as stationary phase f...
02/24/2004
6673979Process for separating alkylaromatic hydrocarbons
A process for separating at least one C8 alkylaromatic hydrocarbon from a mixture containing at least one C8 alkylaromatic hydrocarbon and at least one C9 or C10 alkylaromatic hydrocarbon using dealuminated sodi...
01/06/2004
6483002Integrated fractional distillation for adsorptive separation process
Construction and operational costs of simulated moving bed adsorptive separation process units are reduced by recovering desorbent from both the extract and raffinate streams of the process in a single column. Both streams are fractionated to recover deso...
11/19/2002
6410815Agglomerated zeolite adsorbents, process for their preparation, and their use for adsorbing paraxylene from aromatic C8 fractions
The present invention relates to agglomerated zeolite adsorbents based on faujasite with an Si/Al ratio such that 1ࣘSi/Alࣘ1.15, at least 70% exchanged with barium and optionally with potassium, and on a binder, preferably a zeolitizable binder. They a...
06/25/2002
6403856Process for separating alkylaromatic hydrocarbons
A process for separating at least one C8 alkylaromatic hydrocarbon from a mixture containing at least one C8 alkylaromatic hydrocarbon and at least one C9 or C10 alkylaromatic hydrocarbon using sodium zeolite Y,...
06/11/2002
6395951Adsorptive separation product recovery by fractional distillation
Construction and operational costs of recovering the extract or raffinate product of a simulated moving bed adsorptive separation process units are reduced by employing a dividing wall column to perform the separation. The raffinate or extract stream is p...
05/28/2002
6348636Purification of polymeric dispersions by stripping in the presence of adsorbent materials
The present invention relates to methods for removing VOCs from an aqueous polymer dispersion (e.g., an SBR latex) in which the dispersion is contacted with a stripping medium in the presence of a particulate adsorbent such as activated carbon. This proce...
02/19/2002
6348637Multifunction fractionation column for adsorptive separation processes
Construction and operational costs of simulated moving bed adsorptive separation process units are reduced by recovering desorbent from both the extract and raffinate streams of the process in a single column. Both streams are fractionated in the same col...
02/19/2002
6329562Separation process for separating cycloalkenes having at least 2 double bonds from a reaction mixture
A process for separating off cycloalkenes having at least two double bonds from a reaction mixture in hydrocarbon solution formed during the metathesis of cycloalkamonoenes or cyclomonoene/cyclopolyene mixtures comprising the steps of treating the reactio...
12/11/2001
6281406Adsorption process for paraxylene purifacation using Cs SSZ-25 adsorbent with benzene desorbent
An adsorption process for the recovery of paraxylene from mixed xylenes using a molecular sieve adsorbent comprising SSZ-25, MCM-22, PSH-3, ERB-1, or ITQ-1. A preferred desorbent for the process is benzene. A hybrid adsorption/crystallization PX purificat...
08/28/2001
6274784Process for separating alkylaromatic hydrocarbons
A process for separating at least one C8 alkylaromatic hydrocarbon from a mixture containing at least one C8 alkylaromatic hydrocarbon and at least one C9 or C10 alkylaromatic hydrocarbon using zeolite Y or zeol...
08/14/2001
5900523Process for adsorptive separation of metaxylene from xylene mixtures
Metaxylene is recovered from admixture with other C8 aromatic hydrocarbons including orthoxylene by liquid phase adsorptive separation using a sodium exchanged Y zeolite as the adsorbent. Performance is improved by maintaining the adsorbent in ...
05/04/1999
5849981Adsorptive separation of para-xylene using isopropylbenzene desorbent
The cost of separating para-xylene from other xylene isomers and C9 aromatics by adsorption on zeolitic molecular sieves is reduced by the use of 1,4 diisopropylbenzene as a relatively high boiling desorbent. The desorbent has surprisingly high...
12/15/1998
5643442Membrane process for enhanced distillate or hydrotreated distillate aromatics reduction
Distillate or hydrotreated distillate effluent is separated into an aromatics rich permeate and an aromatics lean retentate by use of a permselective membrane with the aromatic rich permeate being sent to a hydrotreater, thereby increasing the quantity of...
07/01/1997
5629467Process and apparatus for the separation of p-xylene in C8 aromatic hydrocarbons with a simulated moving bed adsorption and a crystallization
To continuously produce and separate high purity p-xylene from a C8 aromatic hydrocarbon charge, successive use is made in combination of (1) a stage of separating low-purity p-xylene (75 to 98%) by simulated moving bed adsorption chromatograph...
05/13/1997
5453560Process for adsorptive separation of ethylbenzene from aromatic hydrocarbons
Ethylbenzene is recovered from a mixture of C8 aromatic hydrocarbons including xylenes by adsorptive separation in a narrow temperature range using a cesium exchanged X zeolite as the adsorbent. A mixture of diethylbenzene and toluene is the pr...
09/26/1995
5414191Method of removing alkyltetralins from an alkylbenzene mixture
According to the method of the invention, it is possible to separate and selectively remove alkyltetralins coexisting in a small amount in a LAB mixture which is an intermediate raw material for surfactants for detergents, the method conveniently being ca...
05/09/1995
5382747Process for the adsorptive separation of metaxylene from aromatic hydrocarbons
Metaxylene is recovered from a mixture of C8 aromatic hydrocarbons including other xylenes by liquid phase adsorptive separation using a sodium or sodium and lithium exchanged Y zeolite as the adsorbent. Performance is improved by maintaining t...
01/17/1995
5336837Separation of diethylbenzene isomers on silicalite in the presence of high pressure carbon dioxide and propane
A process for separating p-diethylbenzene from a diethylbenzene isomers mixture by selective adsorption of p-diethylbenzene on a silicalite adsorbent is disclosed in the present invention, wherein a compressed high pressure CO2 or propane is us...
08/09/1994
5329060Integrated selective adsorption and crystallization process for para-xylene recovery
The eutectic limit of para-xylene crystallization is overcome by enriching the concentration of para-xylene of the crystallization feed. This is accomplished by passing the crystallization feed stream through a selective adsorption zone to produce a para-...
07/12/1994
5300721Method for separating 2,6-diethylnaphthalene
This invention provides a method for separating 2,6-diethylnaphthalene from a mixture of diethylnaphthalene isomers by contacting said mixture with zeolite producing the same powder X-ray diffraction pattern as faujasite and the method can efficiently sep...
04/05/1994
5294334Benzene removal and conversion from gasoline boiling range streams
A totally contained adsorption process for the substantial total removal and conversion of benzene to cyclohexane in gasoline boiling range streams. At least a portion of the gasoline boiling range stream is passed through an adsorption zone containing an...
03/15/1994
5284992Process and apparatus for the separation of p-xylene in C8 aromatic hydrocarbons with a simulated moving bed absorption and a crystallization
To continuously produce and separate high purity p-xylene from a C8 aromatic hydrocarbon charge, successive use is made in combination of (1) a stage of separating low-purity p-xylene (75 to 98%) by simulated moving bed adsorption chromatograph...
02/08/1994
5278344Integrated catalytic reforming and hydrodealkylation process for maximum recovery of benzene
The present invention is an integrated catalytic reforming/hydrodealkylation process that maximizes benzene recovery by incorporating refrigeration and pressure swing adsorption separation units. In the refrigeration separation unit, liquid reformate is u...
01/11/1994
5268523Selective sorption of dialkylated multinuclear aromatic compounds
The invention relates to a process for the separation cf various dialkyl multinuclear aromatic compounds from a feed stream of mixed isomers of those compounds. A shape selective adsorbent is employed resulting in a process that is more efficient than pro...
12/07/1993
5245108Cycloolefin purification method
A process for selectively reducing the 5-isopropenyl-2-norbornene content of a dicyclopentadiene composition by contacting a 5-isopropenyl-2-norbornene containing DCPD composition with an acid clay....
09/14/1993
5223589Process for separating durene from substituted benzene hydrocarbons
The separation of durene in high purity from coal tar or petroleum fractions by an adsorptive chromatographic process and liquid phase with lithium-exchanged X zeolite as the adsorbent and liquid aromatic desorbents....
06/29/1993
5220099Purification of a hydrocarbon feedstock using a zeolite adsorbent
A process for purifying linear paraffins in which a hydrocarbon stream containing linear paraffins contaminated with aromatics, sulfur-, nitrogen-, and oxygen-containing compounds, and color bodies, but essentially free of olefins, is contacted with a zeo...
06/15/1993
5210333Benzene removal from hydrocarbon streams
A method for the separation of benzene from a hydrocarbon stream, such as a gasoline boiling range stream, which comprises contacting the hydrocarbon stream with an adsorbent capable of selectively adsorbing the benzene from the stream, hydrogenating the ...
05/11/1993
5202516Process of recovering monoalkylbenzene and pure 1,3,5-trialkylbenzene from a mixture of dialkyl- and trialkylbenzenes
A process of recovering monoalkylbenzene and pure 1,3,5-trialkylbenzene from an isomeric mixture containing dialkyl- and trialkylbenzenes. The process comprises transalkylating a monocyclic aromatic compound with a mixture of dialkyl- and trialkyl-benzene...
04/13/1993
5146040Process for separating dimethylnaphthalene isomers with zeolite L agglomerates
Zeolite L in very small crystalline form is prepared by a process in which an alkaline reaction mixture comprising water, a source of silicon (SiO2), a source of alkali metal (M) (KOH) and a source of aluminium (Al2 O3.3H.sub.2
09/08/1992
5019667Process for purification of hydrocarbons
Clinoptilolites, including both natural and synthetic clinopilolites which have been ion-exchanged with metal cations such as lithium, sodium, potassium, calcium, magnesium, barium, strontium, zinc, copper, cobalt, iron and manganese, are useful for the r...
05/28/1991
5004853Continuous process for the production of 2,6-dimethylnaphthalene
A continuous process is presented for the production and recovery of a high purity stream of 2,6-dimethylnaphthalene. The process comprises the general steps of: fractionating a hydrocarbon feed stream to recover a process stream rich in the various isome...
04/02/1991
4962273Purification of alpha naphthol-containing feedstock by adsorption
An adsorptive separation process useful in the purification of alpha naphthol-containing feed mixtures, said process comprising the employment of a type X, type Y or a de-aluminated type Y zeolite material and a desorbent material comprising a primary alc...
10/09/1990
4835334Two-stage adsorptive separation process for purifying 2,6 Dimethylnaphthalene
A two stage adsorptive separation process for recovering purified 2,6 Dimethylnaphthalene ["2,6 DMN"] from a fresh feed mixture comprising 2,6 DMN and at least one isomer thereof, which process comprises a first stage, employing a first stage adsorbent an...
05/30/1989
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