Patent application number | Description | Published |
20090152170 | Mixed Matrix Adsorbent for Separation of Gasoline Components - A mixed matrix adsorbent is found for use in the removal of light alkanes from a gasoline stream. The mixed matrix comprises two adsorbents with one adsorbent having an LTA type structure and the other adsorbent having an MFI structure. | 06-18-2009 |
20090299015 | Crosslinked Organic-Inorganic Hybrid Membranes and Their Use in Gas Separation - The present invention is for crosslinked membranes and in particular for crosslinked poly(ethylene oxide)-cellulose acetate-silsesquioxane (PEO-CA-Si) organic-inorganic hybrid membranes and their use in gas separation. These crosslinked PEO-CA-Si membranes were prepared by in-situ sol-gel co-condensation of crosslinkable PEO-organotrialkoxysilane and CA-organotrialkoxysilane polymers in the presence of acetic acid catalyst during the formation of membranes. The crosslinkable PEO- and CA-organotrialkoxysilane polymers were synthesized via the reaction between the hydroxyl groups on PEO (or on CA) and the isocyanate on organotrialkoxysilane to form urethane linkages under mild conditions. The crosslinked PEO-CA-Si membranes exhibited both increased selectivity of CO | 12-03-2009 |
20090326308 | BINDERLESS ADSORBENTS COMPRISING NANO-SIZE ZEOLITE X AND THEIR USE IN THE ADSORPTIVE SEPARATION OF PARA-XYLENE - Adsorbents and methods for the adsorptive separation of para-xylene from a mixture containing at least one other C | 12-31-2009 |
20090326309 | BINDERLESS ADSPRBENTS AND THEIR USE IN THE ADSORPTIVE SEPARATION OF PARA-XYLENE - Adsorbents and methods for the adsorptive separation of para-xylene from a mixture containing at least one other C | 12-31-2009 |
20090326310 | 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 C | 12-31-2009 |
20100270234 | PLASTICIZATION RESISTANT MEMBRANES - This invention discloses a composition of, a method of making, and an application of high plasticization-resistant chemically cross-linked organic-inorganic hybrid membranes such as cross-linked cellulose acetate-cellulose triacetate-polyurethanepropylsilsesquioxane membranes. These cross-linked membranes with covalently interpolymer-chain-connected hybrid networks were prepared via a sol-gel condensation polymerization of cross-linkable organic polymer-organosilicon alkoxide precursor membrane materials. CO | 10-28-2010 |
20100288122 | CROSSLINKED ORGANIC-INORGANIC HYBRID MEMBRANES AND THEIR USE IN GAS SEPARATION - The present invention is for crosslinked membranes and in particular for crosslinked poly(ethylene oxide)-cellulose acetate-silsesquioxane (PEO-CA-Si) organic-inorganic hybrid membranes and their use in gas separation. These crosslinked PEO-CA-Si membranes were prepared by in-situ sol-gel co-condensation of crosslinkable PEO-organotrialkoxysilane and CA-organotrialkoxysilane polymers in the presence of acetic acid catalyst during the formation of membranes. The crosslinkable PEO- and CA-organotrialkoxysilane polymers were synthesized via the reaction between the hydroxyl groups on PEO (or on CA) and the isocyanate on organotrialkoxysilane to form urethane linkages under mild conditions. The crosslinked PEO-CA-Si membranes exhibited both increased selectivity of CO | 11-18-2010 |
20100326273 | PLASTICIZATION RESISTANT MEMBRANES - This invention discloses a composition of, a method of making, and an application of high plasticization-resistant chemically cross-linked organic-inorganic hybrid membranes such as cross-linked cellulose acetate-cellulose triacetate-polyurethanepropylsilsesquioxane membranes. These cross-linked membranes with covalently interpolymer-chain-connected hybrid networks were prepared via a sol-gel condensation polymerization of cross-linkable organic polymer-organosilicon alkoxide precursor membrane materials. CO | 12-30-2010 |
20110245556 | Ethylene Production By Steam Cracking of Normal Paraffins - A simulated moving bed adsorptive separation process for preparing the separate feed streams charged to naphtha reforming unit and a steam cracking unit has been developed. The feed stream to the overall unit is passed into the adsorptive separation unit. The desorbent in the adsorptive separation is C12 hydrocarbons. The simulated moving bed adsorptive separation separates the components of the feed stream into a normal paraffin stream, which is charged to the steam cracking process, and non-normal hydrocarbons which are passed into a reforming zone. The desorbent is readily separated from the normal paraffin stream and from the non-normal paraffin stream and the simulated moving bed adsorption zone is operated at an A/Fn ratio of from about 0.90 to about 0.92. | 10-06-2011 |
20110295052 | PROCESSES FOR OLEFIN/PARAFFIN SEPARATION UTILIZING POROUS, HYDROPHOBIC POLY(ETHER ETHER KETONE) MEMBRANES - Processes for olefin/paraffin separation utilizing porous, hydrophobic poly(ether ether ketone) (PEEK) membranes are provided. In accordance with an exemplary embodiment, a process for olefin/paraffin separation comprises providing a porous membrane formed of PEEK polymer functionalized with hydrophobic groups, the porous membrane having a first surface and a second surface. The first surface of the porous membrane is contacted with a feed comprising an olefin and a paraffin and a permeate is caused to flow from the second surface of the porous membrane. The permeate has a concentration of the paraffin that is higher than a concentration of the paraffin of the feed. | 12-01-2011 |
20120004491 | Adsorptive Process for Separation of C8 Aromatic Hydrocarbons - A method for separating a xylene from a feed mixture by contacting the feed mixture with a bed of adsorbent comprising metal organic framework crystals selective to the xylene. | 01-05-2012 |