Quotables
"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8168845 | Separation process The invention relates to an improved absorption-type separation and/or purification processes having dual rotary valves. ... | 05/01/2012 |
| 8124825 | Method of purifying 2,7-dimethylnaphthalene To provide a method of purifying 2,7-dimethylnaphthalene comprising the step of bringing a raw oil containing a mixture of 1,7-dimethylnaphthalene and 2,7-dimethylnaphthalene together with a developing solvent into contact with L-type zeolite to thereby effect adsor... | 02/28/2012 |
| 8049055 | Process and device for separation in a simulated moving bed with a bypass fluid flow rate that is not regulated automatically Process for separation of a feedstock F by adsorption in a simulated moving bed in an SMB device that comprises a zone 1 for desorption of compounds produced by extraction, a zone 2 for desorption of compounds produced with a raffinate, a zone 3 for adsorption of co... | 11/01/2011 |
| 8013202 | Method for separating aromatic compounds using simulated moving bed operation Disclosed is a method for separating aromatic compounds using a simulated moving bed (SMB) operation, characterized by injecting each raw material having a different composition into each different part of an adsorption chamber so as to improve the recovery rate. Mo... | 09/06/2011 |
| 7977526 | Simulated countercurrent adsorptive separation process A process is described for the separation of a first chemical compound from a liquid feed stream comprising at least first and second chemical compounds by simulated countercurrent adsorptive separation. In the process, the feed stream and a liquid desorbent stream ... | 07/12/2011 |
| 7928276 | Process for producing high purity meta-xylene, comprising simulated moving bed adsorption and crystallization The invention concerns a process for producing high purity meta-xylene, comprising a step for separation by simulated moving bed adsorption starting from an aromatic C8 feed delivering a fraction which is rich in meta-xylene and a fraction which is depleted in meta-... | 04/19/2011 |
| 7915471 | Method for producing paraxylene comprising an adsortion step and two isomerization steps A process for producing para-xylene from a hydrocarbon feed is described in which an adsorption column operating as a simulated moving bed with at least five zones delivers an extract, a 2-raffinate and an intermediate raffinate. The extract is distilled and ... | 03/29/2011 |
| 7838713 | Process for separating para-xylene from a mixture of C8 and C9 aromatic hydrocarbons The process includes at least two adsorptive separation zones to separate para-xylene from a feed stream comprising C8 aromatic hydrocarbons and at least one C9 aromatic hydrocarbon component. An adsorbent comprising X or Y zeolite and a heavy desorbent are used in ... | 11/23/2010 |
| 7838714 | Process and device for improved separation of metaxylene in a simulated moving bed Process for separation of metaxylene, with at least 99% by weight of purity of an aromatic feedstock F, in a single adsorption stage in a simulated moving bed in an SMB device that comprises 12, 13 or 15 adsorbent beds with different numbers of beds being employed i... | 11/23/2010 |
| 7763767 | Adsorption process with on-line adsorbent removal This invention relates to a process for conversion of hydrocarbon feedstock, comprising the steps of (A) feeding the hydrocarbon feedstock to an adsorption unit; (B) adsorbing the hydrocarbon feedstock in the adsorption unit with a solid particulate adsorbent useful... | 07/27/2010 |
| 7759534 | Process and device for improved separation of paraxylene in a simulated moving bed Process for separating paraxylene with a purity that is at least equal to 99.5% by weight from an aromatic feedstock F in a single adsorption stage in a simulated moving bed (SMB), comprising different numbers of beds, allocated to a zone 1 between the supply of the... | 07/20/2010 |
| 7728187 | Adsorbent and process for the separation of meta-xylene from aromatic hydrocarbons Adsorbents and methods for the adsorptive separation of meta-xylene from a mixture containing at least one other C8 aromatic hydrocarbon (e.g., a mixture of ortho-xylene, meta-xylene, para-xylene, and ethylbenzene) are described. Suitable adsorbents compr... | 06/01/2010 |
| 7718842 | Process for separating meta-xylene from a feed of aromatic hydrocarbons by liquid phase adsorption using tetraline as a desorbant The invention concerns a process for separating meta-xylene from a hydrocarbon feed comprising isomers containing 8 carbon atoms, comprising: a step for bringing said feed into contact with a faujasite type zeolite adsorbant, the p... | 05/18/2010 |
| 7683233 | Process for producing para-xylene In a process for producing a para-xylene enriched product from a gaseous mixture comprising at least para-xylene, meta-xylene and ortho-xylene, the gaseous mixture is contacted with an adsorbent capable of selectively adsorbing para-xylene and comprising a crystalli... | 03/23/2010 |
| 7649124 | Simulated moving bed adsorptive separation process using a plurality of adsorption chambers in parallel and crystallizer and device used therein Provided is a process for adsorptive separation of p-xylene from an aromatic hydrocarbon mixture comprising other isomers of xylene, and a device used therein. More specifically, the present invention provides a separation process employing simulated moving bed (SMB... | 01/19/2010 |
| 7638677 | Mixed matrix adsorbent for para-xylene separation A process for separating C8 aromatics is disclosed. The process uses at least two adsorbents, and in particular a BaX zeolite and a KY zeolite, for the separation of para-xylene from a mixture of C8 aromatics. ... | 12/29/2009 |
| 7635795 | Simulated moving bed adsorptive separation process comprising preparation of feed by using single adsorption chamber and device used therein Provided is a process for adsorptive separation of p-xylene from an aromatic hydrocarbon mixture comprising other isomers of xylene, and a device used therein. More specifically, the present invention provides a separation process employing simulated moving bed (SMB... | 12/22/2009 |
| 7576253 | Method of separating dimethylnaphthalene isomers Use of mordenite zeolite and zeolite Y as adsorbents enables a dimethylnaphthalene isomer mixture to be efficiently separated. A feedstock oil containing a dimethylnaphthalene isomer mixture including an α,α-isomer, an α,β-isomer, and a β,β-isomer is passed th... | 08/18/2009 |
| 7468468 | Process for separating meta-xylene from a feed of aromatic hydrocarbons by liquid phase adsorption The invention concerns a process for separating meta-xylene from a hydrocarbon feed comprising isomers containing 8 carbon atoms, comprising: a step for bringing said feed into contact with a faujasite type zeolite adsorbant, the w... | 12/23/2008 |
| 7396973 | Simulated moving bed adsorptive separation process for handling multiple feedstocks The present invention discloses a means to improve the production capacity and feedstock handling flexibility of a simulated moving bed adsorptive separation process by introducing a second feed stream to the adsorbent chamber, such second feed stream comprising a f... | 07/08/2008 |
| 7371913 | Selective aromatics isomerization process A process for isomerizing xylenes while retaining ethylbenzene in a C8-aromatics stream in liquid phase uses a gallium-substituted pentasil zeolite in the absence of hydrogen. ... | 05/13/2008 |
| 7368620 | Two-stage aromatics isomerization process This invention is drawn to a process for isomerizing a non-equilibrium mixture of alkylaromatics in two sequential zones, the first zone operating in the absence of hydrogen using a platinum-free catalyst and the second zone using a catalyst comprising a molecular s... | 05/06/2008 |
| 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 particularly, integrated processes of the invention comprise separations by... | 04/15/2008 |
| 7332080 | Apparatus for salt free water softening A water softening system and process for softening water on an as needed basis is disclosed. The system and process softens water without the addition of a substitute metal exchange cation. ... | 02/19/2008 |
| 7301064 | Ethylbenzene conversion and xylene isomerization processes and catalysts therefor Catalysts comprising a combination of molecular sieve having a pore diameter of from about 4 to 8 angstroms and a catalytically-effective amount of molybdenum hydrogenation component in an amorphous aluminum phosphate binder provide processes for isomerizing xylene ... | 11/27/2007 |
| 7270792 | Process for producing para-xylene A process and a system for increasing para-xylene production from a C8 aromatic feedstream by coupling at least one xylene isomerization reactor with at least one pressure swing adsorption unit or temperature swing absorption unit to produce a product hav... | 09/18/2007 |
| 7271305 | Method of obtaining para-xylene Disclosed herein is an improved method for making and obtaining para-xylene from a mixture of xylene isomers, and various embodiments of the method. The method generally includes contacting a mixture comprising xylene isomers and ethylbenzene with a para-xylene sele... | 09/18/2007 |
| 7262147 | Method for preparing dehydrocyclodimerization catalyst This invention relates to a process for reactivating a dehydrocyclodimerization catalyst. Dehydrocyclodimerization catalysts which contain an aluminum phosphate binder can be deactivated when they are exposed to hydrogen at temperatures above 500° C. The instant pr... | 08/28/2007 |
| 7229558 | Chromatographic separation method A method for fractionating a solution into two or more fractions. More particularly the invention relates to a method for fractionating a solution by a chromatographic simulated moving bed (SMB) process in which the dissolved substances present in the feedstock are ... | 06/12/2007 |
| 7208651 | Product recovery from simulated-moving-bed adsorption Product purity from or capacity of a simulated-moving-bed adsorptive separation process is increased by flushing the contents of the transfer line previously used to remove the raffinate stream away from the adsorbent chamber, preferably into the raffinate column us... | 04/24/2007 |
| 7192526 | Method of optimizing the operation of a xylene separation unit using simulated countercurrent Method of optimizing the operation of a unit intended for separation of the components of a feed (xylenes) by simulated countercurrent in hybrid operating mode. The method allows to minimize the solvent ratio and to maximize the capacity of the separation uni... | 03/20/2007 |
| 7022229 | Adsorption separation system An apparatus is presented for separating chemicals using adsorption separation methods. The apparatus uses a plurality of adsorption units holding adsorbent, where the adsorption units are serially connected and are moved to shift the relative position of the feeds ... | 04/04/2006 |
| 7011695 | Barium-and calcium-based zeolitic adsorbent for gas purification in particular air Zeolite adsorbent, and method of production, exchanged with calcium and barium cations, for purifying or separating a gas or gas mixture, in particular air, so as to remove therefrom the impurities found therein, such as hydrocarbons and nitrogen oxides (Nx | 03/14/2006 |
| 6979402 | Miniature actual moving bed assembly An apparatus is presented for separating chemicals using adsorption separation methods. The apparatus uses a plurality of adsorption units holding adsorbent, where the adsorption units positioned in a cylindrical spool, are serially connected and the spool is rotate... | 12/27/2005 |
| 6924406 | Process 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 |
| 6884918 | Agglomerated zeolitic adsorbents, method for obtaining same uses thereof The present invention relates to agglomerated zeolitic adsorbents based on zeolite X with an Si/Al ratio such that 1.15 | 04/26/2005 |
| 6878855 | Process for producing para-xylene A process and a system for increasing para-xylene production from a C8 aromatic feedstream by coupling at least one xylene isomerization reactor with at least one pressure swing adsorption unit or temperature swing absorption unit to produce a product hav... | 04/12/2005 |
| 6841714 | Process for co-production of paraxylene, metaxylene and/or orthoxylene A process for co-production of paraxylene, metaxylene and/or orthoxylene from a hydrocarbon feedstock (1) that comprises [1] a separation stage of the feedstock in a simulated moving bed in a chromatographic column (9) that contains a number of beds of... | 01/11/2005 |
| 6838588 | Process for co-producing para-xylene and metaxylene, comprising two separation steps A process is described for co-producing metaxylene and paraxylene from a hydrocarbon feed comprising two separation steps. The first step of the process is a counter-current simulated moving bed system in a chromatographic column containing at least five zones, comp... | 01/04/2005 |
| 6828470 | Coproduction process for para-xylene and ortho-xylene comprising two separation steps A coproduction process for ortho-xylene and para-xylene starting with a batch of hydrocarbons comprises a simulated counter-current fluidized bed system in a chromatographic column (6) containing at least five zones, comprising injection (1) of the bat... | 12/07/2004 |
