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7217303 Pressure swing reforming for fuel cell systems  
The present invention provides an improvement in the process of producing hydrogen from hydrocarbon-containing streams. A cyclic reforming process, referred to as pressure swing reforming, provides...
7157013 Filtration method  
A method of filtering contaminants from a chemical process stream is disclosed. The method includes a step of passing the process stream over a filtration medium including a plurality of discrete...
7067052 Process for the production of reformate having reduced ethylbenzene content  
A process for reforming a hydrocarbon feed containing precursors of ethylbenzene, e.g., C 8 isoalkane and/or C 8 isoalkene precursors of ethylbenzene, that results in the formation of reduced...
6740228 Process for reforming petroleum hydrocarbon stocks  
Processes for reforming, and in particular aromatising, hydrocarbons from a petroleum source may be carried out by contacting the hydrocarbons with a catalyst of a zeolite KL impregnated with a...
6458266 Catalytic reforming process with inhibition of catalyst deactivation  
A substantially water-free hydrocarbon feed is charged to a multiple-reactor reformer system being operated under reforming conditions and comprising at least two reformer reactors serially...
6398947 Reformate upgrading using zeolite catalyst  
The patent application discloses an integrated process for reformate upgrading. Such a process enables production of a high value product slate, by incorporating the step of reforming along with...
6335474 Process for pre-reforming of oxygen-containing gas  
Process for the catalytic steam reforming of a hydrocarbon feed stock with a content of higher hydrocarbons and oxygen comprising the steps of catalytic pre-reforming the feed stock and steam...
6284128 Reforming with selective reformate olefin saturation  
A process combination is disclosed to selectively upgrade hydrocarbons in a manner to essentially eliminate olefins in product from the combination. Preferably the hydrocarbons comprise naphtha...
6190534 Naphtha upgrading by combined olefin forming and aromatization  
A process combination is disclosed to selectively upgrade naphtha to obtain a component for blending into gasoline. A naphtha feedstock is subjected to formation of olefins from paraffins using a...
6177002 Catalytic reforming process with multiple zones  
A hydrocarbon feedstock is catalytically reformed in a sequence comprising a first bifunctional-catalyst reforming zone, a zeolitic-reforming zone containing a catalyst comprising a platinum-group...
6143166 Process for production of aromatics in parallel reformers with an improved catalyst life and reduced complexity  
This process relates to reforming a full-boiling range hydrocarbon feed in two parallel stages while maximizing the catalyst life of the heavy cut reformer and/or reducing the complexity of the...
6106696 Moving bed reforming process without heating between the combined feed exchanger and the lead reactor  
This invention is a reforming process that employs at least two moving bed reaction zones. One of the reaction zones, called the lead reaction zone, passes catalyst particles and a...
6051128 Split-feed two-stage parallel aromatization for maximum para-xylene yield  
A full boiling hydrocarbon feed is reformed to enhance para-xylene and benzene yields. First, the hydrocarbon feed is separated into a C 5 - cut, a C 6 -C 7 cut, and a C 8 + cut. The C 6 -C 7 ...
6036845 Modified riser-reactor reforming process with prereactor  
A catalytic reforming process comprises a prereactor which provides an intermediate stream to a riser reactor with multiple catalyst injection points to obtain high aromatics yields from a naphtha...
6001241 BTX from naphtha without extraction  
A hydrocarbon feedstock is catalytically reformed in a sequence comprising a zeolitic-reforming zone containing a catalyst comprising a platinum-group metal and a nonacidic L-zeolite and an...
5972207 Catalytic reforming process for heavy cracked naphtha  
A large pore volume catalyst was used for reforming heavy cracked naphtha. The average pore diameter is preferably between about 110 to 150 Angstroms. Improved catalytic stability and improved...
5958217 Two-stage reforming process that enhances para-xylene yield and minimizes ethylbenzene production  
A hydrocarbon feed is reformed to enhance para-xylene yield and to minimize ethylbenzene production. The hydrocarbon feed is subjected to catalytic aromatization at elevated temperatures in the...
5954941 Jet engine fuel and process for making same  
The invention concerns a jet engine fuel having the following characteristics: i) distilling range from 140 to 300° C.; ii) cis-decalin/trans-decalin ratio greater than 0.2; iii)...
5935415 Continuous catalytic reforming process with dual zones  
A hydrocarbon feedstock is catalytically reformed in a sequence comprising a continuous-reforming zone, consisting essentially of a moving-bed catalytic reforming zone and continuous regeneration...
5865986 Hydrocarbon conversion  
This is a process for upgrading a petroleum naphtha fraction. The naphtha is subjected to reforming and the reformate is cascaded to a benzene and toluene synthesis zone over a benzene and toluene...
5858205 Multizone catalytic reforming process  
A hydrocarbon feedstock is catalytically reformed in a process which comprises at least three catalyst zones. The feedstock contacts a catalyst comprising platinum, a halogen, and a metal promoter...
5779992 Process for hydrotreating heavy oil and hydrotreating apparatus  
A hydrotreating apparatus comprising (a') a fixed-bed reactor packed with a hydrotreating catalyst for hydrotreating a heavy oil and (b') a suspended-bed reactor packed with a hydrotreating...
5770042 Upgrading of cyclic naphthas  
A process combination is disclosed to selectively upgrade naphtha to obtain an isoparaffin-rich product for blending into gasoline. A naphtha feedstock is subjected to ring cleavage to convert...
5763731 Process for selectively opening naphthenic rings  
Naphthenic rings in naphthenic ring-containing compounds in a feedstream are selectively opened wherein at least about 50 wt. % of the ring compounds in the feedstream are characterized as...
5600046 Combination dehydrocyclodimerization and dehydrogenation process for producing aromatic and olefin products  
This invention deals with a process for converting aliphatic C 2 -C 6 hydrocarbons into C 6 + aromatics and C 3 = /C 4 = olefins. The process involves combining dehydrocyclodimerization (DHCD)...
5565086 Catalyst combination for improved wax isomerization  
The present invention is directed to an improved isomerization process employing a catalyst wherein the catalyst comprises a pair of catalyst particles of different acidity utilized either as...
5562817 Reforming using a Pt/Re catalyst  
Catalytic reforming wherein the lead reactor contains a catalsyt comprised of platinum and a relatively low level of Re on an inorganic oxide support. The tail reactor contains a platinum rhenium...
5552033 Integrated process for increasing C.sub.6 to C.sub.8 aromatics content in reformate prepared from C.sub.9.sup.+ aromatics-containing feed  
An integrated process for increasing C 6 to C 8 aromatics content in reformate prepared from C 9 + aromatics-containing feed comprises: 1) pretreating a raw naphtha feedstream containing C 9...
5507939 Catalytic reforming process with sulfur preclusion  
A hydrocarbon feedstock is catalytically reformed to effect dehydrocyclization of paraffins in a process combination comprising a first reforming zone, a sulfur-removal zone containing a mixed...
5489724 High pressure drop endothermic process  
Aliphatic feeds are converted to olefins and/or aromatics in a multi pressure reactor system. A high pressure first stage reactor generates much or all of the hydrogen needed to reduce catalyst...
5439583 Sulfur removal systems for protection of reforming crystals  
A process is disclosed for removing residual sulfur from a hydrotreated naphtha feedstock. The feedstock is contacted with molecular hydrogen under reforming conditions in the presence of a less...
5417843 Reforming with two fixed-bed units, each having a moving-bed tail reactor sharing a common regenerator  
A process for reforming a gasoline boiling range naphtha stream using a reforming process unit comprised of two independent process units, each of which are operated in two stages. The first stage...
5407558 Method for controlling multistage aromatization process to give high aromatic barrel per calendar day throughput  
A method is provided of selecting operating parameters for an aromatization process having at least penultimate and final stages, each containing a respective catalyst, for optimum aromatic barrel...
5401386 Reforming process for producing high-purity benzene  
Provided is a reforming process for producing a high purity benzene product using a non-acidic zeolitic catalyst. The high purity benzene is extracted from a light fraction of reformate that has...
5401388 Selective upgrading of naphtha  
A process combination is disclosed to selectively upgrade naphtha to obtain gasoline which is in accordance with current standards for reformulated fuels. A naphtha feedstock is fractionated to...
5382350 High hydrogen and low coke reforming process  
A low severity continuous reforming process that operates at conditions to provide a low coke production provides an improved reformulated gasoline fuel. The conditions for the reforming operation...
5376259 Staged catalyst processing to produce optimum aromatic barrel per calendar day aromatic production  
A naphtha feed is contacted in a penultimate aromatic forming stage under catalytic aromatic forming conditions with a first catalyst. The effluent from the penultimate stage is contacted in a...
5368720 Fixed bed/moving bed reforming with high activity, high yield tin modified platinum-iridium catalysts  
A two stage process for reforming a naphtha feed at low severities with tin modified platinum-iridium catalysts. In particular, both high selectivity, and high activity are manifested by such...
5358631 Dehydrocyclization or catalytic reforming using sulfur tolerant zeolite catalyst  
A process is provided for catalytic reforming or dehydrocyclization of hydrocarbons using a catalyst comprising a noble metal, and an intermediate pore size crystalline silicate having a high...
5354451 Fixed-bed/moving-bed two stage catalytic reforming  
A two stage process for catalytically reforming a gasoline boiling range hydrocarbonaceous feedstock. The reforming is conducted in two stages wherein the first stage is operated in a fixed-bed...
5342506 Reforming using a PT-low RE catalyst in the lead reactor  
Catalytic reforming wherein the lead reactor contains a catalyst comprised of platinum and a relatively low level of Re on an inorganic oxide support. The tail reactor contains a tin modified...
5292427 Staged-acidity reforming (C-2705)  
Staged-Acidity Naphtha Reforming provides increased C 5 + liquid yields by systematically adjusting catalyst acidity within a multireactor reformer to match the different acid strengths required...
5269907 Process for reforming at low severities with high-activity, high-yield, tin modified platinum-iridium catalysts  
A process for reforming a naphtha feed at low severities with tin modified platinum-iridium catalysts. In particular, both high selectivity, and high activity are manifested by such catalysts in...
5259946 Sulfur removal system for protection of reforming catalysts  
A process for removing residual sulfur from a hydrotreated naphtha feedstock is disclosed. The feedstock is contacted with molecular hydrogen under reforming conditions in the presence of a less...
5246567 Benzene removal in an isomerization process  
A process is provided for the hydrogenation of benzene and the isomerization of a light naphtha feedstock consisting essentially of a stream having a boiling range of from about 50° F. to about...
5242576 Selective upgrading of naphtha fractions by a combination of reforming and selective isoparaffin synthesis  
A process combination is disclosed to selectively upgrade naphtha to obtain gasoline which is in accordance with current standards for reformulated fuels. A naphtha feedstock is fractionated to...
5221463 Fixed-bed/moving-bed two stage catalytic reforming with recycle of hydrogen-rich stream to both stages  
A two stage process for catalytically reforming a gasoline boiling range hydrocarbonaceous feedstock. The reforming is conducted in two stages wherein the first stage is operated in a fixed bed...
5211838 Fixed-bed/moving-bed two stage catalytic reforming with interstage aromatics removal  
A two stage process for catalytically reforming a gasoline boiling range hydrocarbonaceous feedstock. The reforming is conducted in two stages wherein the first stage is operated in a fixed bed...
5203988 Multistage reforming with ultra-low pressure cyclic second stage  
Disclosed is a process for catalytically reforming a gasoline boiling range hydrocarbonaceous feedstock. The reforming is conducted in multiple stages with heavy aromatics removal between the first...
5196110 Hydrogen recycle between stages of two stage fixed-bed/moving-bed unit  
A two stage catalytic reforming process. The first stage is comprised of two separate fixed-bed reforming units each comprised of one or more serially connected fixed-bed reforming zones. The...
Matches 1 - 50 out of 313 1 2 3 4 5 6 7 >