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| Number | Title | Issue Date |
| 8152902 | Packaging material such as film, fiber, woven and nonwoven fabric with adsorbancy The invention relates to compositions that can be used to adsorb low concentration, preferably, for example less than 15 ppm, of unwanted or target substances. Typically the absorbance can be from an enclosed vapor phase. Such absorbency is accomplished in a contain... | 04/10/2012 |
| 8002877 | Method of trapping ethylene Ethylene is a gaseous growth hormone produced by plant which triggers the ripening of fruits and vegetables. Titanium dioxide, positioned on a filter, acts to trap ethylene to remove the ethylene from a vegetation storage container. Sodium silicate is utilized to ab... | 08/23/2011 |
| 7332640 | Light hydrocarbon separation using 8-member ring zeolites The present invention is related to a method for kinetically separating a light hydrocarbon mixture comprising at least two components by preferentially adsorbing a first component on a zeolite adsorbent comprising 8-member rings of tetrahedra as the pore opening co... | 02/19/2008 |
| 7326821 | Removal of oxygenate from an olefin stream This invention is to a process for removing dimethyl ether from an olefin stream. The process includes contacting the olefin stream with a molecular sieve that has improved capacity to adsorb the dimethyl ether from the olefin stream. The molecular sieve used to rem... | 02/05/2008 |
| 7323041 | Gas storage canister A gas storage canister for use in an automotive vehicle, includes a case having first and second end sections which are opposite to each other in a direction of flow of gas. The first end section has a gas inflow port and a gas outflow port. The second end section h... | 01/29/2008 |
| 7309381 | Gas storage canister A vapor storage canister used to treat fuel vapor of an automotive internal combustion engine. The vapor storage canister includes a casing. A granular formed heat accumulative material is disposed in the casing and includes a powdered heat accumulative agent formed... | 12/18/2007 |
| 7169212 | Gas separation process This invention relates to gas separation processes using a Li-rho zeolite, in particular to an air separation process where the Li-rho zeolite is an oxygen selective adsorbent. ... | 01/30/2007 |
| 7166146 | Mixed matrix membranes with small pore molecular sieves and methods for making and using the membranes A mixed matrix membrane is provided which comprises a continuous phase organic polymer and small pore molecular sieves dispersed therein. The molecular sieves have a largest minor crystallographic free diameter of 3.6 Angstroms or less. When these molecular sieves a... | 01/23/2007 |
| 7148392 | Separation of 1-butene from Cfeed streams In a process for selectively separating 1-butene from a C4 feed stream comprising at least 1-butene, cis-2-butene and trans-2-butene, the feed stream is passed through a first bed of an adsorbent comprising a crystalline microporous material to form a sub... | 12/12/2006 |
| 7067597 | Process of making polypropylene from intermediate grade propylene This invention concerns using an intermediate grade propylene stream as feed to a polypropylene forming reaction system. The intermediate grade propylene stream is preferably recovered form the olefin product of an oxygenate to olefins reaction process, and low in d... | 06/27/2006 |
| 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 |
| 6953493 | Method for preparing DDR type zeolite membrane, DDR type zeolite membrane, and composite DDR type zeolite membrane, and method for preparation thereof This invention provides a DDR type zeolite membrane, characterized in that it is formed as a membrane on a substrate and its main component is silica, and that each single gas permeance at room temperature and 100° C. are different, respectively among at least two ... | 10/11/2005 |
| 6901808 | Capacitive manometer having reduced process drift A capacitive manometer includes a flow passage through which gas can enter the manometer, a deflectable diaphragm, and a filter arranged in the flow passage. The filter is capable of removing condensable vapors from the gas so that the condensable vapors do not reac... | 06/07/2005 |
| 6837917 | Process for the removal of ethylene oxide from air A process for removal of ethylene oxide (EO) from ambient air laden with EO is passed through a zeolite-based removal media, which preferrably consists of the acid form of zeolite ZSM-5, herein referred to as “H-ZSM-5.” The process described herein may be applie... | 01/04/2005 |
| 6797038 | Adsorbents, method for the manufacture thereof and process for the separation of unsaturated hydrocarbons from gas mixture An adsorbent for selective adsorption of unsaturated hydrocarbons from its mixture with saturated hydrocarbons, carbon dioxide, carbon monoxide, permanent gases or mixture thereof. The adsorbent includes a silver or copper compound in an amount of 1 to 70 wt % and a... | 09/28/2004 |
| 6733572 | Separation of propylene and dimethylether from hydrocarbon mixtures The present invention is a process for separating propylene and dimethylether from a mixture comprising propylene, dimethylether, and propane. The mixture is passed through a bed of an adsorbent comprising a porous crystalline material having (i) diffusion time cons... | 05/11/2004 |
| 6730142 | Separation of propylene from hydrocarbon mixtures In a process for separating propylene from a mixture comprising propylene and propane, the mixture is passed through a bed of an adsorbent comprising a porous crystalline material having (i) a diffusion time constant for propylene of at least 0.1 sec−1,... | 05/04/2004 |
| 6726746 | Apparatus and method for removing and fractionating sorbates from sorbents A method for removing a first sorbate having a first desorption activation energy and a second sorbate having a second desorption activation energy from a sorbent, involves a two-stage desorber. In a first stage, the first sorbate, second sorbate and the sorbent are... | 04/27/2004 |
| 6706857 | Recovery of olefin monomers In a process for the production of a polyolefin, an olefin monomer is polymerised said polyolefin and residual monomer is recovered. A gas stream comprising the monomer and nitrogen is subjected to a PSA process in which said monomer is adsorbed on a periodically re... | 03/16/2004 |
| 6652627 | Process for separating a fluid component from a fluid mixture using microchannel process technology This invention relates to a process for separating a fluid component from a fluid mixture comprising the fluid component, the process comprising: (A) flowing the fluid mixture into a microchannel separator; the microchannel separator comprising a pluralit... | 11/25/2003 |
| 6641788 | Absorbent for a hydrocarbon, and exhaust gas-purifying catalyst An adsorbent for a hydrocarbon, comprising a calcined ଲ-type zeolite showing a powder X-ray diffraction such that the sum of X-ray diffraction intensities at lattice spacings d=1.15&#b1;0.03 nm and d=0.397&#b1;0.01 nm, is at least 90% of the diffrac... | 11/04/2003 |
| 6592650 | Gas separation using organic-vapor-resistant membranes and PSA A process for separating a gas from a gas mixture containing an organic compound gas or vapor by a hybrid separation combining adsorption with membrane gas separation, using membranes selective for the gas over the organic compound. The membranes use a se... | 07/15/2003 |
| 6576043 | Recovery of nitrogen and light hydrocarbons from polyalkene purge gas A method for the separation of a gas mixture comprises (a) obtaining a feed gas mixture comprising nitrogen and at least one hydrocarbon having two to six carbon atoms; (b) introducing the feed gas mixture at a temperature of about 60° F. to about 105° ... | 06/10/2003 |
| 6530974 | Method for the separation of molecules in the gas phase by adsorption by means of agglomerated solid inorganic adsorbents with a narrow and calibrated mesopore distribution The present invention relates to a novel family of inorganic solids with a narrow and calibrated mesopore distribution which are agglomerated with a binder; these solids can advantageously be used as adsorbents for the industrial separation of gas-phase c... | 03/11/2003 |
| 6517611 | Olefin separations employing CTS molecular sieves Separation of ethylene from ethane is achieved by feeding a mixture of the C2 hydrocarbons in contact with a CTS-1 crystalline titanium silicate molecular sieve which has a controlled pore size to selectively adsorb ethylene and size exclude et... | 02/11/2003 |
| 6491740 | Metallo-organic polymers for gas separation and purification The present invention provides for methods and compositions for gas separation and purification utilizing a metallo-organic polymer adsorbent in processes for separating carbon dioxide, water, nitrogen oxides and hydrocarbons from gas streams. The metallo... | 12/10/2002 |
| 6488741 | Light hydrocarbon separation using 8-member ring zeolites A method of selectively adsorbing propylene in mixtures of propylene/propane and propylene/olefins through the use of zeolites having structures with a maximum of 8-member rings of tetraheda controlling the diffusion rate. Suitable zeolite adsorbents are ... | 12/03/2002 |
| 6468329 | Adsorbents and methods for the separation of ethylene and propylene and/or unsaturated hydrocarbons from mixed gases Adsorbents useful in the selective adsorption of unsaturated hydrocarbons, the manufacture of the adsorbents, and processes for the separation of unsaturated hydrocarbons using the adsorbents.... | 10/22/2002 |
| 6432171 | Thermal swing adsorption process The present invention provides for a thermal swing adsorption process for the removal of trace impurities such as oxides of nitrogen and hydrocarbons from air prior to its separation by cryogenic distillation. The process may utilize three adsorbent layer... | 08/13/2002 |
| 6425937 | Process for purifying air by adsorption over a barium-exchanged zeolite A process for purifying a gas stream containing at least one impurity chosen from the group formed by propane, nitrogen protoxide and ethylene, in which process: (a) the gas stream to be purified is brought into contact with at least one adsorbent includi... | 07/30/2002 |
| 6425941 | Oxidation resistant granular activated carbon The present invention is directed to an activated carbon composition that is resistant to oxidation and the activated carbon bed fires that can result from uncontrolled oxidation of the activated carbon bed. The activated carbon composition of the present... | 07/30/2002 |
| 6409800 | Temperature swing adsorption process Nitrogen oxides and low molecular weight hydrocarbons are removed from air by subjecting the air to a temperature swing adsorption process using as the adsorbent a composite zeolite product containing both zeolite A and zeolite X. The composite zeolite pr... | 06/25/2002 |
| 6406521 | Process for purifying propylene A process is provided for the concentration and recovery of propylene from propane by a pressure swing adsorption (PSA) process using an adsorbent comprising AlPO-14. A PSA process is used to remove propylene from a C3 hydrocarbon stream compri... | 06/18/2002 |
| 6391092 | Thermal swing adsorption process for the removal of dinitrogen oxide, hydrocarbons and other trace impurities from air The present invention provides for a process for purifying atmospheric air prior to its separation by cryogenic distillation. The process utilizes three adsorbent layers, the first primarily removes water; the second primarily removes CO2 ; and... | 05/21/2002 |
| 6315816 | Adsorbents, method for the preparation and method for the separation of unsaturated hydrocarbons for gas mixtures A group of solid adsorbents in the form of powder, granules or pellets having improved adsorptive capacity and selectivity for ethylene and/or propylene is disclosed. These adsorbents comprise (a) a silver compound and (b) a bentonite clay support bulk of... | 11/13/2001 |
| 6296688 | Vacuum swing adsorption process for separating propylene from propane A vacuum swing adsorption process is provided for the separation of propylene from a feedstream comprising propylene and propane using an adsorbent comprising AlPO-14 to produce a high purity propylene product stream at high recovery. The vacuum swing ads... | 10/02/2001 |
| 6293999 | Process for separating propylene from propane A process is provided for the concentration and recovery of propylene from propane using an adsorbent comprising AlPO-14 at adsorption temperatures less than 120° C. and an adsorption pressure comprising a propylene partial pressure between about 0.5 bar... | 09/25/2001 |
| 6270557 | Process for purifying air by adsorption before cryogenic distillation Process for separating at least carbon dioxide (CO2) contained in a gas stream, preferably air, in which at least carbon dioxide is adsorbed on a zeolite-X having a Si/Al ratio of approximately 1 to 1.5 and containing at most 35% of K+ | 08/07/2001 |
| 6200366 | Separation of alkenes and alkanes Ethene is separated from a gas mixture containing ethane by a pressure swing adsorption process carried out at a temperature in the range of about 50 to about 200° C., wherein the adsorption step of the process is conducted by passing the gas mixture thr... | 03/13/2001 |
| 6168652 | Process for purifying halosilanes A process for purifying halosilanes consisting of contacting a mixture comprising a halosilane and a hydrocarbon with silica gel, thereby reducing the hydrocarbon content of the mixture. The present process is particularly useful for removing hydrocarbon ... | 01/02/2001 |
