The present invention relates to a method for effectively utilizing fructose raffinate obtained in the process for separating psicose conversion product with a high purity chromatography in the process for preparing psicose, and more specifically, it is utilized for preparation of fructose-containing raw material solution for preparing psicose by supplying the fructose raffinate obtained in the separation step of psicose preparation into the psicose conversion reaction.

Disclosed is a process for recovering paraxylene in which a first simulated moving bed adsorption unit is used to produce two extract streams—one rich in paraxylene and a paraxylene-rich extract stream that is lean in ethylbenzene and an ethylbenzene-rich extract stream that is lean in paraxylene- and a paraxylene-depleted raffinate stream. A significant amount of the ethylbenzene is removed in the ethylbenzene-rich extract stream (at least enough to limit buildup in the isomerization loop), so the paraxylene-depleted raffinate stream may be isomerized in the liquid phase. Avoiding vapor phase isomerization saves energy and capital, as liquid phase isomerization requires less energy and capital than the vapor phase isomerization process due to the requirement of vaporizing the paraxylene-depleted stream and the use of hydrogen, which requires an energy and capital intensive hydrogen recycle loop.

This disclosure relates to a method and a system for processing grapes. An example system includes a simulated moving bed (SMB) device configured to receive a feed stream and an eluent stream as inputs and provide an extract stream and a raffinate stream as outputs. The feed stream includes a grape juice, the extract stream includes a high-sugar grape juice, and the raffinate stream includes a low-sugar grape juice. The system also includes fermentation equipment configured to produce a low-alcohol wine from the low-sugar grape juice.

The present invention relates to a method of preparing kestose-containing fructooligosaccharide, and more specifically, a method of preparing kestose-containing fructooligosaccharide having a high content of kestose and excellent storage stability.

The present invention advantages over conventional methods and products. In an aspect, a method comprises separating a mixture of allulose, fructose, glucose, and gluco-oligosaccharides, wherein the separating comprises using simulated moving bed chromatography, and recovering allulose at a high purity and yield. In an aspect, the simulated moving bed (“SMB”) chromatography to separate a fraction enriched with allulose from a fraction enriched with fructose and glucose, and to separate a fraction enriched with fructose from a fraction enriched with glucose. In an aspect, the method provides separation of an allulose from a mixture of allulose, fructose, and D-glucose, wherein the mixture is produced from high fructose corn syrup (“HFCS”) when HFCS is contacted with an allulose epimerase. In an aspect, the method produces a high quality allulose product. In an aspect, the fraction enriched with fructose can be recycled to contact the allulose epimerase.

A method for purifying a mixture in a multicolumn chromatography system. The method successively and cyclically collects a raffinate, injects the mixture to be separated, collects an extract, and injects eluent. The mixture to be separated contains fructose and has a dry matter mass concentration of 45 to 55%. The method is carried out at a temperature of 50 to 62° C.

A method of recovering a sugar by separating a fermentation inhibitor and the sugar from a sugar solution containing the fermentation inhibitor, the method including: bringing the sugar solution containing the fermentation inhibitor into contact with a basic anion exchange resin filled into a column, followed by separation of the fermentation inhibitor and the sugar by a difference in retention time therebetween through use of water as an eluent, and separate recovery of a fraction containing the fermentation inhibitor and a fraction containing the sugar, wherein the basic anion exchange resin is previously treated with a solution containing the fermentation inhibitor.

The present invention relates to a method for fractionating a feedstock into two or more fractions enriched with different components, and more particularly to a method for fractionating a feedstock into two or more fractions by a chromatographic sequential simulated moving bed (SMB) system, wherein the SMB system comprises a separation loop comprising at least 2 compartments; and wherein the method comprises a separation cycle comprising at least one feeding step, at least one circulating step and at least one eluting step; wherein the dissolved substances in the feedstock form a separation profile as they progress through the separation loop; and the separation profile is progressed more than once or less than once through the separation loop in each separation cycle; and wherein at least two flow paths are present in the separation loop during each feeding step of the separation cycle; and at least one of said flow paths is an active flow path and at least one of said flow paths is an inactive flow path.

A method for producing high purity D-psicose crystals having a purity of 98% (w/w) or more and a grain size of MA200 or more. The method includes: removing impurities from a D-psicose solution to obtain a purified D-psicose solution; concentrating the purified D-psicose solution; cooling the concentrated D-psicose solution to 30° C. to 40° C. through a heat exchanger; seed crystallizing the D-psicose solution at 30° C. to 40° C. to obtain a seed crystallized massecuite; and full-scale crystallizing the seed crystallized massecuite. The method can produce pure D-psicose crystals in a suitable form for industrial application through an economical crystallization process from the D-psicose solution without using organic solvents.

The present invention relates to a zeolite-based adsorbent comprising at least one zeolite of FAU structure of LSX type and comprising barium and/or potassium, in which the outer surface area of said zeolite-based adsorbent, measured by nitrogen adsorption, is between 20 m.sup.2.Math.g.sup.−1 and 100 m.sup.2.Math.g.sup.−1, limits inclusive. The present invention also relates to the use of such a zeolite-based adsorbent as an adsorption agent, and also to the process for separating para-xylene from aromatic isomer fractions containing 8 carbon atoms.