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| Number | Title | Issue Date |
| 7692052 | Multi-zone process for the production of xylene compounds A multi-zone process for the conversion of a hydrocarbon feedstock comprising cyclic compounds to produce aromatic compounds, and in particular xylene compounds. A naphtha boiling range stream having a boiling point range from about 71° C. (160° F.) to about 216°... | 04/06/2010 |
| 7629283 | Aromatic isomerization catalyst and isomerization process One exemplary embodiment can be an extruded C8 alkylaromatic isomerization catalyst. The extruded catalyst can include: about 2-about 20%, by weight, of an MTW zeolite; about 80-about 98%, by weight, of a binder in... | 12/08/2009 |
| 7626064 | Transalkylation process This invention embodies a catalyst and a process for transalkylation of C7, C9, and C10 aromatics to obtain a high yield of xylenes. The catalyst comprises a novel UZM-14 catalytic material comprising globular aggregates of crystalli... | 12/01/2009 |
| 7622622 | Process for the high yield production of monoalkylaromatics Disclosed is a process and apparatus for alkylating light olefin with benzene at near but less than full conversion of the olefin. We have found that stopping below full conversion of the olefin maximizes yield of monoalkylbenzene. ... | 11/24/2009 |
| 7622061 | Apparatus for crystallizing polymer particles The present invention is a process and apparatus for conserving loss of heat while forming and crystallizing polymer particles in a liquid. The cooling liquid quenches the polymer during particle molding to facilitate shaping. The cooling liquid cools the polymer pa... | 11/24/2009 |
| 7314551 | Flow distribution apparatus Disclosed is a mixer-distributor-collector apparatus for use between beds of solid particles in a fluid-solid contacting vessel. The apparatus includes a solids retaining screen, fluid deflector, passageway, fluid distributor, and flow manipulator. The flow manipula... | 01/01/2008 |
| 7271303 | Multi-zone process for the production of diesel and aromatic compounds A multi-zone process for the production of low sulfur diesel and aromatic compounds wherein C9+ hydrocarbons are hydrocracked to produce low sulfur diesel and a naphtha boiling range stream which is reformed and transalkylated within reforming ... | 09/18/2007 |
| 7268267 | Alkylation process using UZM-8 zeolite A process for the alkylation of aromatics with olefins using a solid catalyst bed containing UZM-8 zeolite is disclosed. A polyalkylated aromatic is passed to the catalyst bed to reduce the concentration of the olefin at alkylation conditions. A portion of the efflu... | 09/11/2007 |
| 7265252 | Process for xylene production A process for the conversion of a hydrocarbon feedstock to produce xylene compounds. The feedstock is selectively hydrocracked and introduced into a transalkylation zone with a hydrocarbonaceous stream rich in benzene, toluene and C9+ hydrocarb... | 09/04/2007 |
| 7230152 | Process for selective aromatics disproportionation with increased conversion An improved process is disclosed for the selective disproportionation of toluene. The process preferably uses a disproportionation catalyst comprising a pentasil type zeolite such as MFI that is bound with aluminum-phosphate. Running the process at a toluene convers... | 06/12/2007 |
| 7011759 | Vessel head-flush process Pressure is balanced within a partitioned process vessel by flushing the heads of the vessel. Careful handling of the flush purge removed from the head can mitigate the loss of valuable product to this stream. ... | 03/14/2006 |
| 6896812 | Process to compensate for a discrete non-separating section in simulated moving bed adsorptive separation processes Fluctuations, such as perturbations in the quality of the extract and/or raffinate streams removed from the circuit in a simulated moving bed (SMB) adsorptive process having at least one discrete non-separating section are eliminated or significantly reduced. This i... | 05/24/2005 |
| 6883788 | Shielding of heat exchangers in columns Disclosed is a method and an apparatus for exchanging heat in a column by passing a first vapor phase through a heat exchanger in the column to exchange heat with a first stream and produce a second vapor phase in the column. The second vapor phase is passed through... | 04/26/2005 |
| 6783120 | Multiple downcomer fractional distillation tray and process The performance of multiple downcomer fractional distillation trays is improved by intercepting the liquid egressing from the bottom of the downcomers in a manner which directs a portion of the liquid along the major axis of decking of the next lower tray. This is a... | 08/31/2004 |
| 6769672 | Two-phase distribution apparatus and process Vapor and liquid passing downward through a vessel are brought into contact within a plurality of distributor assemblies arranged across a horizontal distribution tray located within the vessel. The distributor assemblies have fluid flow paths with different resista... | 08/03/2004 |
| 6739585 | Multiple downcomer fractionation trays having liquid distribution devices Liquid distributors collect liquid falling out of the spout group at the ends of a downcomer of a fractionation tray. The devices then distribute the liquid against the wall of the column or onto the decking of the next lower tray so to cause uniform liquid flows ac... | 05/25/2004 |
| 6726835 | Fractionation for full boiling range gasoline desulfurization Savings in the processing of a naphtha boiling range feed containing a thiophene are achieved by fractionating the feed stream in a single dividing wall column to yield a C6-minus overhead stream, a side-draw containing the majority of the C6 a... | 04/27/2004 |
| 6706938 | Adsorptive separation process for recovery of para-xylene The performance of an adsorptive separation process recovering para-xylene from a C8 aromatic hydrocarbon feed mixture is improved by operating the process at higher desorbent purity. The improved performance allows for tradeoffs in other operating parame... | 03/16/2004 |
| 6682633 | Apparatus for cocurrent fractional distillation A modular apparatus for fractional distillation and other forms of vapor-liquid contacting is presented. The apparatus performs cocurrent contacting of vapor and liquid in a number of identical structural units which are placed in horizontal layers in a c... | 01/27/2004 |
| 6670519 | Monomethyl paraffin adsorptive separation process The amount of the adsorbent needed to recover a set quantity of monomethyl branched C10 -C15 paraffins from a mixture comprising normal paraffins and other nonnormal hydrocarbons such as di-isoparaffins, di-isoolefins, naphthenes and... | 12/30/2003 |
| 6645350 | Dividing wall column fractionation tray Problems generated by heat transfer through the vertical dividing wall of a trayed "dividing wall column" and into a downcomer of a tray are mitigated by providing a separate vertical isolation wall between the downcomer and dividing wall. The isolation w... | 11/11/2003 |
