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A method for the crystallization of fructose


, : A method for the crystallization of fructose. European Patent Application (EP 293 680): 7

Crystalline fructose is obtained by adding ethanol to a concentrated solution of fructose containing at least 90 (95) % fructose w/w, evaporating the mixture to supersaturation at least 1.02 (1.05), adding anhydrous fructose seed crystals of particle size about 40-50 microns, and removing ethanol-water as an azeotrope at reduced pressure, 100-700 (480 millibars), while maintaining the solution at substantially constant temperature in the range 50-75 degrees C, preferably about 65 degrees C.


Accession: 001738367

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Related references

Liaw, G.C.; Gaddy, J.M.; Mallee, F.M.; Reust, S.J., 1991: Method for crystallization of fructose. A fructose solution is crystallized to produce a 1st massecuite, most of which is centrifuged to give crystalline product and mother liquor. The remaining massecuite (the 'heel') is mixed with 1st dry crystalline seed (finer than the exi...

Ivchuk, N.P.; Petrushevskii, V.V.; Odorod' ko, N.I.; Arkhipovich, N.A., 1988: Method of fructose crystallization. Fructose syrup (e.g. 90 degrees Bx, purity 93-94) is cooled (e.g. from 75 to 50 degrees C) to a supersaturated state, seeded (with 10% crystals of size about 0.2 mm, or 25-30% w/w of the preceding massecuite) and crystallized for 75-150 h with add...

Istvan, E.S.; Hasemann, C.A.; Kurumbail, R.G.; Uyeda, K.; Deisenhofer, J., 1995: Crystallization and preliminary X-ray analysis of fructose 6-phosphate, 2-kinase:fructose 2,6-bisphosphatase. Diffraction-quality crystals of the bifunctional enzyme fructose 6-phosphate, 2-kinase:fructose 2,6-bisphosphatase from rat testis have been obtained. The crystals were grown in the presence of ATP-gamma-S, fructose 6-phosphate, the detergent n-oc...

Lake, Brian D., 1965: The histochemical detection of fructose -I-phosphate aldolase and fructose I-6-diphosphate aldolase, and the application of the method to a case of fructose intolerance. A histochemical method for the determination of the 2 aldolases is presented. It incorporates the requirements for the biochemical estimation of the enzymes and had been applied to various frozen tissues including a liver biopsy from a case of fru...

Lake, B.D., 1965: The histochemical demonstration of fructose-1-phosphate aldolase and fructose-1-6-diphosphate aldolase, and application of the method to a case of fructose intolerance. Journal. Royal Microscopical Society 85(4): 489-498

Kaufmann, U.; Froesch, E.R., 1973: Inhibition of phosphorylase-a by fructose-1-phosphate, alpha-glycerophosphate and fructose-1,6-diphosphate: explanation for fructose-induced hypoglycaemia in hereditary fructose intolerance and fructose-1,6-diphosphatase deficiency. European Journal of Clinical Investigation 3(5): 407-413

Jiang, Y.; Huang, Z.; Ma, K.; Chen, X., 1989: Resorcinol-spectrophotometric method for determination of fructose in fructose-glucose syrup. Fructose-glucose syrup is diluted with aqueous HCl, resorcinol is added, and the mixture is heated at 100 degrees C for 8 minutes. The red coloration that forms is measured at 473 nm. A sample of honey was shown to contain 35.0 micro g fructose/ml...

Shin, Y.S.; Moro, V.; Doliwa, H.; Endres, W., 1983: A radioisotopic method for fructose-1-phosphate aldolase assay that facilitates diagnosis of hereditary fructose intolerance. A sensitive new method in which D-[U-14C]fructose-1-phosphate is used for fructose-bisphosphate aldolase (EC 2.1.2.13) assay is described. The radioactive fructose-1-phosphate compound was prepared from [U-14C]fructose by use of partly purified fr...

Prado, F.-Eduardo; Sampietro, A.-Rodolfo, 1994: A method for the determination of fructose using a single enzyme: Production and properties of fructose dehydrogenase from Gluconobacter industrius. A simple method for the production, solubilization and purification of fructose dehydrogenase from Gluconobacter industrius has been developed. G. industrius was grown in a liquid medium with sucrose. The enzyme was solubilized using Triton X-100,...

Binder, T.P.; Logan, R.M., 1990: Aqueous-alcohol fructose crystallization. Various processes are claimed for crystallizing fructose from aqueous ethanol. Aqueous fructose magma (typically 90-93 degrees Bx, fructose purity 95-98%) from a continuous vacuum crystallizer is fed at e.g. 100-130 (116) degrees F to a vacuum eva...