Uop Lcc

James W Priegnitz

Richard W Neuzil

Santi Kulprathipanja

Anil Rajaram Oroskar

Stephen W Sohn

Bipin Virpal Vora

Gavin Paul Towler

Bryan K Glover

Beth McCulloch

Arthur M Landis

Kenneth J Stippich

Kurt M Vanden Bussche

Hermann A Zinnen

Linda Shi Cheng

Jack Hurst

Michael H Quick

Beth Mc Culloch

Kurt Vanden Bussche

Armand J deRosset

Darryl M Johnson, Sr

Scott E Commissaris

Adsorbents and methods for the adsorptive separation of para-xylene from a mixture containing at least one other Caromatic hydrocarbon (e.g., a mixture of ortho-xylene, meta-xylene, para-xylene, and ethylbenzene) are described. Suitable binderless adsorbents (e.g., formulated with the substantial absence of an amorphous material that normally reduces selective pore volume), particularly those with a water content from about 3% to about 5.5% by weight, improve capacity and/or mass transfer. These properties are especially advantageous for improving productivity in low temperature, low cycle time adsorptive separation operations in a simulated moving bed mode.

Binderless adsorbents and their use in the adsorptive separation of para-xylene

The present invention comprises a process for removal of oxygenates from a paraffin-rich or olefin-rich paraffin stream which comprises passing a feed stream, comprising one or more Cto Cfeed paraffins or Cto Colefin-rich paraffin stream and one or more oxygenates through an adsorbent bed comprising one or more adsorbents selected from silica gel, activated alumina and sodium x zeolites to remove essentially all of said oxygenates; and recovering said paraffins. A second adsorbent bed may be employed to more thoroughly remove these oxygenates.

Process for removal of oxygenates from a paraffin stream

A process and apparatus are disclosed for the operation of a fuel cell to generate electric power from a feed stream comprising a hydrocarbon or an alcohol. The fuel cell comprises a proton exchange membrane which produces electric power from a hydrogen product stream which comprises essentially no carbon monoxide. The hydrogen product stream is produced from the feed stream in a novel steam reforming zone containing a steam reforming catalyst disposed in a bell-shaped catalyst zone. The bell-shaped catalyst zone is disposed over a combustion zone such that the exhaust gas from the combustion flows around the bell-shaped catalyst zone to heat the catalyst from the inside and the outside of the catalyst zone. Furthermore, the bell-shaped catalyst zone maintains a high inlet and a high outlet temperature to avoid methane slippage in the steam reforming zone. Heat for the steam reforming zone is provided by a fuel stream and at least a portion of the anode waste gas stream from the fuel cell.

Apparatus for generation of pure hydrogen for use with fuel cells

Process for the generation of pure hydrogen for use with fuel cells

Resolution of a mixture of organic materials by simulated moving bed chromatography using a weakly interacting adsorbent as a stationary phase can be routinely effected with a liquid mobile phase characterized by atypically low values of k' with recoveries of at least 95% and a purity of at least 95%. In particular, values in the range 0.1&lt;k'&lt;1.0 are recommended with a resulting savings in mobile phase consumption, inventory, and recovery.

Separations by simulated moving bed chromatography operating at low k'

Separations by simulated moving bed chromatography operating at low K'

Various chemicals such as pharmaceuticals and petrochemicals are chromatographically separated in pilot plant quantities using an apparatus comprising a number of chambers containing an adsorbent linked together with valving necessary to simulate the continuous countercurrent flow of the adsorbent and liquid phases. The apparatus preferably comprises five multiport rotary valves, each having at least one port for each column. The fifth rotary valve provides a serial interconnection between the columns and also ensures the desired unidirectional flow of fluid in the apparatus.

Small scale simulated moving bed separation process

Resolution of a racemic mixture of organic materials by simulated moving bed chromatography using a chiral stationary phase can be routinely effected at atypically low values of k' with recoveries of at least 95% and an optical purity of at least 95%. In particular, values in the range 0.1&lt;k'&lt;1.0 are recommended with a resulting savings in mobile phase consumption, inventory, and recovery.

Chiral separations by simulated moving bed chromatography operating at

Small scale simulated moving bed separation apparatus and process

The separation of free fatty acids from triglycerides is performed by an adsorptive chromatographic process in liquid phase with silica gel as the adsorbent. A ketone, having from 3 to 8 carbon atoms, such as 2-heptanone, an ester or an ether can be selected as the desorbent.

Process for separating fatty acids and triglycerides

Citric acid is separated from a fermentation broth by using an adsorbent comprising a water-insoluble macroreticular or gel weakly basic anionic exchange resin possessing tertiary amine functional groups or pyridine functional groups, said anionic exchange resin comprising a cross-linked acrylic or styrene resin matrix. Citric acid is desorbed by water or dilute sulfuric acid. The pH of the feed is maintained below the first ionization constant (pKa.sub.1) of citric acid to maintain selectivity.

Separation of citric acid from fermentation broth with a weakly basic

A process for the recovery of glucose from an aqueous mixture of glucose and polysaccharides. The mixture is contacted with an X zeolite containing potassium cations at exchangeable cationic sites and selectively adsorbing glucose in the zeolite. The polysaccharides are removed from the zeolite and the adsorbed glucose recovered by means of a desorbent liquid. Preferred systems for effecting the process are countercurrent and co-current simulating moving beds.

Process for separating glucose from polysaccharides by selective

This invention comprises a process for separating p-toluidine from a feed mixture comprising p-toluidine and o- or m-toluidine, which process comprises contacting the mixture at adsorption conditions with an adsorbent comprising an X or Y-type zeolite cation exchanged with a cation in the group Fe, Mn, Co, Ni or Zn, thereby selectively adsorbing the p-toluidine. The remainder of the feed mixture is removed from the adsorbent and the p-toluidine is recovered by desorption at desorption conditions with a desorbent material comprising aniline or an alkyl amine excluding alkyl amines having eight or more carbon atoms per molecule when the adsorbent comprises an X-type zeolite.

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Elgin, IL, United States of America

James W Priegnitz