Abstract: A process for the separation of one monosaccharide from another. An aqueous feed solution of the monosaccharides is diluted with ethanol and then contacted with a crystalline aluminosilicate adsorbent exhibiting an adsorptive selectivity towards one of the monosaccharides. The one monosaccharide is adsorbed and thereafter recovered.

Abstract: This invention comprises a process for separating a fatty acid from a mixture comprising a fatty acid and a rosin acid, which process comprises contacting the mixture at separation conditions with a molecular sieve comprising silicalite, thereby selectively retaining the fatty acid. The fatty acid may be recovered from the molecular sieve by displacement with a displacement fluid. It is preferred that the displacement fluid comprise a liquid having a minimum polarity index.

Abstract: An improved adsorbent comprising a crystalline aluminosilicate, method of manufacture of the adsorbent and improved process for separating a component from a feed mixture comprising an aqueous solution of a mixture of different components, such as a mixture of saccharides. In the process the mixture is contacted with the adsorbent, which selectively adsorbs a component from the feed mixture. The adsorbed component is then recovered by contacting the adsorbent with a desorbent material such as water to effect the desorption of the adsorbed component from the adsorbent. There is an undesirable tendency for the silicon constituent of the crystalline aluminosilicate to dissolve in the aqueous system. The improvement to the adsorbent and process comprises the coating of the adsorbent with a water permeable organic polymer which substantially reduces the undesirable dissolution.

Abstract: A process for the separation of at least one cresol isomer from a feed mixture containing the cresol and xylenol which process employs a crystalline aluminosilicate adsorbent to selectively adsorb the cresol from the feed mixture. The process employs a desorbent material to recover the cresol. The process may employ a simulated moving bed flow scheme.

Abstract: An adsorptive separation process for separating ethanol from a feed mixture comprising ethanol and water, which process comprises contacting the feed mixture with an adsorbent comprising activated carbon, selectively adsorbing substantially all of the ethanol to be separated to the substantial exclusion of the water and thereafter recovering high purity ethanol. A desorption step is used to desorb the adsorbed ethanol with the desorbent selected being capable of direct blending into motor fuel.

Abstract: A process for isomerizing glucose into fructose having the improvement which comprises the recovery of high purity glucose from the isomerization stage effluent by contacting the mixture with an adsorbent comprising an X zeolite containing potassium cations at the exchangeable cationic sites thereby selectively adsorbing the glucose from the effluent stream mixture, thereafter recovering high purity glucose and recycling the high purity glucose to the isomerization stage.

Abstract: An improved adsorbent comprising a crystalline aluminosilicate, method of manufacture of the adsorbent and improved process for separating a component from a feed mixture comprising an aqueous solution of a mixture of different components, such as a mixture of saccharides. In the process the mixture is contacted with the adsorbent, which selectively adsorbs a component from the feed mixture. The adsorbed component is then recovered by contacting the adsorbent with a desorbent material such as water to effect the desorption of the adsorbed component from the adsorbent. There is an undesirable tendency for the silicon constituent of the crystalline aluminosilicate to dissolve in the aqueous system. The improvement to the adsorbent and process comprises the coating of the adsorbent with ethylcellulose which substantially reduces the undeirable dissolution.

Abstract: A process for separating a normal paraffin from a mixture of the same with another structural class of hydrocarbon selected from the cyclic hydrocarbons having greater than six carbons per molecule and the branched chain hydrocarbons. The process comprises contacting the mixture at adsorption conditions with an adsorbent comprising silicalite. The normal paraffin is selectively adsorbed and will preferably be recovered from the adsorbent by desorption with a desorbent material.

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

Abstract: An adsorptive separation process for separating ethanol from a feed mixture comprising ethanol and water, which process comprises contacting the feed mixture with an adsorbent comprising esterified silica selectively adsorbing substantially all of the ethanol to be separated to the substantial exclusion of the water and thereafter recovering high purity ethanol. A desorption step may be used to desorb the adsorbed ethanol.

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 improved adsorbent comprising a crystalline aluminosilicate, method of manufacture of the adsorbent and improved process for separating a component from a feed mixture comprising an aqueous solution of a mixture of different components, such as a mixture of saccharides. In the process the mixture is contacted with the adsorbent, which selectively adsorbs a component from the feed mixture. The adsorbed component is then recovered by contacting the adsorbent with a desorbent material such as water to effect the desorption of the adsorbed component from the adsorbent. There is an undesirable tendency for the silicon constituent of the crystalline aluminosilicate to dissolve in the aqueous system. The improvement to the adsorbent and process comprises the coating of the adsorbent with ethylcellulose which substantially reduces the undesirable dissolution.

Abstract: Various sugars and particularly sucrose may be separated from mixtures of sugars including glucose, fructose, raffinose, etc. by treating an aqueous solution of the sugar source containing these sugars with an adsorbent which will selectively adsorb sucrose thereon. Thereafter the sucrose may be desorbed from the adsorbent by treatment with a desorbent material. In the process of the present invention the adsorbent will comprise a shaped replicate of a particle aggregate comprising a carbonaceous pyropolymer containing recurring units of at least carbon and hydrogen atoms while the desorbent material will comprise an aqueous alcoholic solution. The preferred alcohols contain methanol and ethanol and will be present in the aqueous alcoholic solution in an amount in the range of from about 10% to about 50% by weight.

Abstract: This invention comprises a process for separating an ester of a fatty acid from a mixture comprising an ester of a fatty acid and an ester of a rosin acid, which process comprises contacting the mixture at adsorption conditions with an adsorbent comprising silicalite, thereby selectively adsorbing the ester of a fatty acid. Preferably the ester of a fatty acid will be recovered from the adsorbent by desorption with a desorbent material.

Abstract: An adsorptive separation process for separating meta-xylene from a feed mixture comprising meta-xylene and the other C.sub.8 aromatics, which process comprises contacting the feed mixture with an adsorbent comprising type Y zeolite containing sodium at the exchangeable cationic sites and having a silica to alumina mole ratio of from about 4.5 to about 5.0, selectively adsorbing substantially all of the meta-xylene isomers to the substantial exclusion of the remaining C.sub.8 aromatics and thereafter recovering high-purity meta-xylene. A desorption step may be used to desorb the adsorbed meta-xylene. The process is carried out preferably in the liquid phase.

Abstract: An improved adsorbent comprising a crystalline aluminosilicate, method of manufacture of the adsorbent and improved process for separating a component from a feed mixture comprising an aqueous solution of a mixture of different components, such as a mixture of saccharides. In the process the mixture is contacted with the adsorbent, which selectively adsorbs a component from the feed mixture. The absorbed component is then recovered by contacting the adsorbent with a desorbent material such as water to effect the desorption of the adsorbed component from the adsorbent. There is an undesirable tendency for the silicon constituent of the crystalline aluminosilicate to dissolve in the aqueous system. The improvement to the adsorbent and process comprises the coating of the adsorbent with a water permeable organic polymer which substantially reduces the undesirable dissolution.

Abstract: Ethanol may be separated from a feed mixture comprising ethanol and water by contacting said feed mixture with an adsorbent comprising a shaped replication of particle aggregates comprising carbonaceous pyropolymers containing recurring units of at least carbon and hydrogen atoms at a temperature in the range of from about 20.degree. to about 230.degree. C. and a pressure in the range of from about atmospheric to about 500 psig, selectively adsorbing substantially all of the ethanol to the substantial exclusion of water and thereafter recovering high purity ethanol by passing a desorbing material over the adsorbent.

Abstract: A process for separating a component from a feed mixture comprising an aqueous solution of a mixture of different components, such as a mixture of saccharides, in which the mixture is contacted with an adsorbent comprising a crystalline aluminosilicate bound with an inorganic oxide binder material which selectively adsorbs a component from the feed mixture. The adsorbed component is then recovered by contacting the adsorbent with a desorbent material such as water to effect the desorption of the adsorbed component from the adsorbent. There is an undesirable tendency for the silicon constituent of the crystalline aluminosilicate to dissolve in the aqueous system. The process comprises the esterification of the crystalline aluminosilicate and/or the binder material with an alcohol at esterification reaction conditions which substantially reduces the undesirable dissolution.

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.