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7638675 |
Processes for the isomerization of normal butane to isobutane
In a normal butane isomerization process where the isomerization effluent ( 108, 114 ) is fractionated in a deisobutanizer ( 116 ) operated such that a lower boiling fraction ( 118 ) is provided...
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7638676 |
Processes for the isomerization of feedstocks comprising paraffins of 5 to 7 carbon atoms
In an isomerization process where the isomerization effluent ( 114 ) is fractionated in a deisohexanizer ( 116 ) to provide a lower boiling fraction ( 122 ) containing dimethylbutanes, a higher...
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7638674 |
Processes for the isomerization of paraffins of 5 and 6 carbon atoms with methylcyclopentane recovery
In an isomerization process where the isomerization effluent ( 108 ) is fractionated in a deisohexanizer ( 116 ) to provide an overhead ( 118 ) containing dimethylbutanes and a higher boiling...
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7619129 |
Process for the separation of olefins and paraffins
A process for the separation of olefinic hydrocarbons from a liquid feedstock composition comprising at least one olefinic hydrocarbon and at least one paraffinic hydrocarbon, said process...
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7612246 |
Process for isomerization of a C7 fraction with co-production of an aromatic molecule-rich fraction
Process for the production of a RON isomerate that is at least equal to 80 and that contains less than 1% by weight of aromatic compounds and for co-production of an aromatic fraction that for the...
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7452405 |
Multi stage sulfur removal system and process for an auxiliary fuel system
A system for producing an auxiliary fuel stream containing a low concentration of sulfur compounds from a primary fuel stream includes a first separation stage to separate a portion of a primary...
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7423192 |
Process and system for blending components obtained from a stream
A method and system for blending components obtained from a feed stock. The method includes flowing a first stream through a membrane member, with the membrane member having a first wafer assembly...
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7411108 |
Process for the removal of conjugated olefins from a monoolefin stream
A method for removing conjugated olefins from a composition comprising contacting the composition with a Diels-Alder dienophile to convert conjugated olefins to a Diels-Alder adduct and arresting...
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7411105 |
Process and installation for the oligomerization of olefins that use a membrane separation
This invention relates to a process for the oligomerization of olefins that have 2 to 6 carbon atoms comprising at least:
a) One reaction stage in which a first effluent that comprises...
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7399897 |
Method of separating olefins from mixtures with paraffins
A process for the separation or concentration of olefinic hydrocarbons from mixtures of olefinic and paraffinic hydrocarbons uses a polyimide membrane, The process is well suited to separating...
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7381858 |
Xylene process using perm-selective separations
Processes are disclosed for production of purified products from a fluid mixtures of C 8 aromatics by means of integration of perm-selective separations with purified product recovery operations....
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7361800 |
Process for the separation of olefins from paraffins using membranes
Chitosan membranes chelated with silver or cuprous material may be used to separate olefins from a mixture of olefins and paraffins. The feed stream is humidified, demisted, treated to remove...
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7358414 |
Para-xylene process using perm-selective separations
Processes and apparatus are disclosed for recovery of purified products from a fluid mixture by means of integrated perm-selective separations with purified product recovery operations. More...
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7351873 |
Continuous process to separate colour bodies and/or asphalthenic contaminants from a hydrocarbon mixture
A continuous process to separate color bodies and/or asphalthenic contaminants from a hydrocarbon mixture by passing part of the hydrocarbon mixture through a membrane over which membrane a...
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7329791 |
Hydrogen transport membranes for dehydrogenation reactions
A method of converting C 2 and/or higher alkanes to olefins by contacting a feedstock containing C 2 and/or higher alkanes with a first surface of a metal composite membrane of a sintered...
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7314565 |
Method and apparatus for separating aromatic hydrocarbons in an isothermal system
An isothermal method is provided for separating aromatic hydrocarbons from a feed stream. The method includes flowing the feed stream through a first channel within a first wafer assembly that...
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7276105 |
Separation of water from Fischer-Tropsch product
A method for separating water from a Fischer-Tropsch reactor product stream in a cost effective and energy efficient manner which comprises feeding a Fischer-Tropsch product stream to a separation...
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7267761 |
Method of reducing sulfur in hydrocarbon feedstock using a membrane separation zone
A membrane is used in combination with fractionation and hydrodesulfurization to reduce the sulfur content of hydrocarbon feeds, preferably sulfur-containing naphtha feeds. A membrane separation...
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7255792 |
Method for modifying an organic composition
There is provided a process for modifying a first organic composition comprising (i) at least one first solvent, (ii) at least one solute, and (iii) optionally, at least one second solvent to...
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7211706 |
Process for recovering hydrogen in a gaseous hydrocarbon effluent using a membrane reactor
In order to recover hydrogen from a hydrogen-rich gaseous effluent, a procedure is used that comprises:
in a stage (a), bringing a hydrocarbon-rich gaseous effluent into contact with the...
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7041212 |
Membrane separation for sulfur reduction
A membrane process for the removal of sulfur species from a naphtha feed, in particular, a FCC light cat naphtha, without a substantial loss of olefin yield is disclosed. The process involves...
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7018527 |
Membrane separation for sulfur reduction
A membrane process for the removal of sulfur species from a naphtha feed, in particular, a FCC light cat naphtha, without a substantial loss of olefin yield is disclosed. The process involves...
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6986358 |
Method and composition to decrease iron sulfide deposits in pipe lines
The levels of iron sulfide present in a conduit, such as a pipeline, are reduced by contacting the conduit, on an inner surface, with a composition obtained from an aqueous solution containing at...
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6986802 |
Selective separation of fluid compounds utilizing a membrane separation process
Apparatus and processes are disclosed for economical separation of fluid mixtures utilizing perm-selective membranes. Broadly, apparatus of the invention comprises a plurality of membrane modules...
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6972093 |
Onboard fuel separation apparatus for an automobile
An onboard fuel separation apparatus separates a material fuel (gasoline) into a high-octane fuel having a higher octane value than the material fuel and a low-octane fuel having a lower octane...
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6899743 |
Separation of organic mixtures using gas separation or pervaporation and dephlegmation
A process for treating mixtures of organic components, including azeotropic mixtures. The process includes a gas- or liquid-phase membrane separation step in conjunction with a dephlegmation step...
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6852902 |
Method of removing entrained sulfuric acid from alkylate
An improvement in the alkylation of olefins with isoalkanes in the presence of sulfuric acid wherein the sulfuric acid is removed from the product by a mechanical coalescer means prior to...
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6793711 |
Mixed conducting membrane for carbon dioxide separation and partial oxidation reactions
Gas-impermeable membranes containing a molten salt electrolyte in an electron-conducting matrix provide for mixed ion and electron conduction across the membrane. The membranes mediate transport of...
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6736961 |
Removal of sulfur from a hydrocarbon through a selective membrane
A process for removing sulfur from a hydrocarbon employs a solid membrane. A feed stream is provided containing a feed liquid hydrocarbon and a feed sulfur species and a sweep stream is provided...
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6702945 |
Ionic membranes for organic sulfur separation from liquid hydrocarbon solutions
Methods for the separation of sulfur compounds from a hydrocarbon mixture using an ionic membrane are provided. Preferred ionic membranes are Nafion®-type (polymers of perfluorosulfonic acid)...
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6649061 |
Membrane process for separating sulfur compounds from FCC light naphtha
A process for the separation of sulfur compounds from a hydrocarbon mixture using a membrane is provided. Preferred hydrocarbon mixtures are oil refining fractions such as light cracked naphtha....
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6649062 |
Fluid-membrane separation
A process for the separation of mixture components uses a supercritical fluid that is fresh to at least one side of a nonporous membrane after which the fluid is either recycled to the opposite...
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6646177 |
Method for separation of p-xylene
A method for separating p-xylene by separating and recovering only p-xylene from a p-xylene-containing raw material mixture under high-temperature and high-pressure conditions using a zeolite...
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6592749 |
Hydrogen/hydrocarbon separation process, including PSA and membranes
An improved process for separating hydrogen from hydrocarbons. The process includes a pressure swing adsorption step, a compression/cooling step and a membrane separation step. The membrane step...
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6559348 |
Process for treating gas flows of polyolefin manufacturing
The invention relates to a process for the treatment of a gas stream obtained from the production of polyolefins and containing unreacted compounds. According to the process, uncondensed compounds...
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6525236 |
Membrane-augmented manufacture of cumene
A process for manufacturing cumene by reacting propylene with benzene, including treating a vent stream from the reaction zone, to recover propylene for return to the reactor. The process involves...
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6517611 |
Olefin separations employing CTS molecular sieves
Separation of ethylene from ethane is achieved by feeding a mixture of the C 2 hydrocarbons in contact with a CTS-1 crystalline titanium silicate molecular sieve which has a controlled pore size...
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6410811 |
Selective hydrogenation process comprising partial separation of hydrogen by a membrane upstream of a reactive column
The process of the invention is a process for selective hydrogenation of a hydrocarbon feed containing hydrogen and C 2 + hydrocarbons, characterized in that it comprises at least one step for...
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6380452 |
Isomerization process using membrane for recovery of halides
A process for recovering halides from hydrocarbon containing streams is disclosed using a sulfonated hexafluro bis-A-polysulfone membrane of polymers and copolymers having the polymer repeat unit...
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6316684 |
Filled superglassy membrane
A membrane and membrane separation process useful in gas, vapor and liquid separations. The membrane comprises a separating layer of a polymer that is characterized by a high glass transition...
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6281405 |
Alkylation process using membrane for recovery of halides
A process for recovering halides from hydrocarbon containing streams is disclosed using a sulfonated hexafluro bis-A-polysulfone membrane of polymers and copolymers having the polymer repeat unit...
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6248931 |
Membrane process for the recovery of halides from hydrocarbon-containing streams
A process for recovering halides from hydrocarbon containing streams is disclosed using a sulfonated hexafluro bis-A-polysulfone membrane of polymers and copolymers having the polymer repeat unit...
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6190540 |
Selective purging for hydroprocessing reactor loop
A process for hydroprocessing a fluid stream containing at least hydrogen and hydrocarbons. The process uses a hydrocarbon-selective membrane to reduce the concentration of hydrocarbons and...
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6190536 |
Catalytic cracking process
Processes and apparatus for providing improved catalytic cracking, specifically improved recovery of olefins, LPG or hydrogen from catalytic crackers. The improvement is achieved by passing part of...
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6187987 |
Recovery of aromatic hydrocarbons using lubricating oil conditioned membranes
Permselective separation of aromatic hydrocarbons from non-aromatic hydrocarbons in a feed stream is accomplished using improved asymmetric membranes. The preferred membranes are fashioned from a...
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6179996 |
Selective purge for hydrogenation reactor recycle loop
Processes and apparatus for providing improved contaminant removal and hydrogen recovery in hydrogenation reactors, particularly in refineries and petrochemical plants. The improved contaminant...
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6171472 |
Selective purge for reactor recycle loop
Processes and apparatus for providing improved contaminant removal and hydrogen reuse in reactors, particularly in refineries and petrochemical plants. The improved contaminant removal is achieved...
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6165350 |
Selective purge for catalytic reformer recycle loop
Processes and apparatus for providing improved catalytic reforming, specifically improved recovery of reformate and hydrogen from catalytic reformers. The improvement is achieved by passing...
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6156950 |
Process for separating a C5-C8 feed or an intermediate feed into three effluents, respectively rich in straight chain, non-branched and multi-branched paraffins
For producing three effluents which are respectively rich in straight chain paraffins, in mono-branched paraffins, and in di-branched and tri-branched paraffins possibly with naphthenic and/or...
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6153100 |
Removing iron salts from NGL streams
The aqueous wash stream of an electrolytic precipitation system treating natural gas liquid (NGL) is maintained at a pH sufficiently basic to decrease the solubility of iron sulfide in the aqueous...
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