Abstract: A process for separating a ketose from a feed mixture comprising a ketose and an aldose which process comprises contacting the mixture with an adsorbent comprising a Y or X zeolite containing one or more selected cations at the exchangeable cationic sites thereby selectively adsorbing a ketose from the feed mixture and thereafter recovering the ketose. Preferably the ketose will be recovered by desorption from the adsorbent with a desorbent material.

Abstract: An adsorptive separation process for separating water from a feed mixture comprising ethanol and water, which process comprises contacting the feed mixture with an adsorbent comprising corn meal, selectively adsorbing substantially all of the water to be separated to the substantial exclusion of the ethanol and thereafter recovering high purity ethanol. The used corn meal may be fermented to provide a source of ethanol. The process may employ a countercurrent moving bed or simulated moving bed countercurrent flow system.

Abstract: An adsorptive separation process for separating ortho or para-nitrotoluene from a feed mixture comprising the isomer to be separated and at least one other isomer of nitrotoluene, or for separating ortho and para-nitrotoluene from a mixture of all three isomers of nitrotoluene, which process comprises contacting the feed mixture with an adsorbent comprising a type X or type Y zeolite, whichever is appropriate, containing at the exchangeable cationic sites the appropriate cations, selectively adsorbing substantially all of the nitrotoluene to be separated to the substantial exclusion of the remaining isomers and thereafter recovering high-purity ortho, para or ortho and para isomers. A desorption step may be used to desorb the adsorbed isomers.

Abstract: An adsorptive separation process for separating ortho-chloronitrobenzene from a feed mixture comprising ortho-chloronitrobenzene and at least one other isomer of chloronitrobenzene, which process comprises contacting the feed mixture with an adsorbent comprising a type X or type Y zeolite containing at the exchangeable cationic sites one or more cations selected from the group consisting of Groups IA, IIA and the transition metals of the Periodic Table of Elements, selectively adsorbing substantially all of the said ortho-chloronitrobenzene to the substantial exclusion of the remaining isomers and thereafter recovering high-purity ortho-chloronitrobenzene. A desorption step may be used to desorb the adsorbed ortho-chloronitrobenzene.

Abstract: An adsorptive separation process for separating the ortho, meta and para isomers of chloronitrobenzene from a feed mixture comprising said isomers, which process comprises contacting the feed mixture in a first adsorption stage with a certain selected adsorbent, selectively adsorbing therein substantially all of the ortho-chloronitrobenzene to the substantial exclusion of the other isomers and thereafter recovering high-purity orthochloronitrobenzene, passing the unadsorbed isomers to a second adsorption stage where they are contacted with another selected adsorbent, selectively adsorbing therein substantially all of one of the isomers and thereafter recovering in high purity that isomer as well as the isomer unadsorbed in the second stage. A desorption step may be used to desorb the adsorbed isomers in each stage.

Abstract: A process for separating a ketose from a feed mixture comprising a ketose and an aldose which process comprises contacting the mixture with an adsorbent comprising a X zeolite containing one or more selected cations at the exchangeable cationic sites thereby selectively adsorbing a ketose from the feed mixture and thereafter recovering the ketose. Preferably the ketose will be recovered by desorption from the adsorbent with a desorbent material.