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44 results about "Galactitol" patented technology

Galactitol (dulcitol) is a sugar alcohol, the reduction product of galactose. It has a slightly sweet taste. In people with galactokinase deficiency, a form of galactosemia, excess dulcitol forms in the lens of the eye leading to cataracts.

Preparation method for coproducing high-purity galactooligosaccharide and galactitol

ActiveCN103667391AHigh purityLow in miscellaneous sugarsFermentationChromatographic separationLactase
The invention relates to a preparation method for coproducing high-purity galactooligosaccharide and galactitol, which comprises the following steps: a) enabling galactosy transferase to act on a lactose solution, thus generating a galactooligosaccharide mixed saccharide solution; b) purifying galactooligosaccharide and miscellaneous saccharide components containing lactose, glucose and the like through a chromatographic separation technology, wherein the purity of the galactooligosaccharide is up to 90% or above; c) degrading the purified and separated miscellaneous saccharides by using lactase; d) by taking skeletal nickel as a catalyst, under the conditions that the temperature is 80-130 DEG C and the pressure is 8-12 Mpa, performing hydrogenation reaction on the enzyme-degraded miscellaneous saccharide components, thus preparing mixed saccharide alcohol; e) performing chromatographic separation and purification on the hydrogenated mixed saccharide alcohol solution, thus producing high-purity galactitol and miscellaneous alcohol components containing sorbitol and the like; and f) respectively performing activated carbon decoloring, ion exchange desalting and vacuum concentration on the galactooligosaccharide, galactitol and sorbitol after chromatographic separation, thus obtaining corresponding products.
Owner:SHANDONG BAILONG CHUANGYUAN BIO TECH

Polyester Copolymer

ActiveUS20210403640A1Improved (bio-) degradabilityEasy to processPolyesterIditol
A polyester copolymer, having a number average molecular weight of equal to or more than 5000 grams/mole and having a glass transition temperature of less than 160° C., containing:
    • (a) in the range from equal to or more than 25 mole % to equal to or less than 49.9 mole %, based on the total amount of moles of monomer units within the polyester copolymer, of one or more bicyclic diol monomer units, wherein such one or more bicyclic diol monomer units is/are derived from one or more bicyclic diols chosen from the group consisting of isosorbide, isoidide, isomannide, 2,3:4,5-di-O-methylene-galactitol and 2,4:3,5-di-O-methylene-D-mannitol;
    • (b) in the range from equal to or more than 45 mole % to equal to or less than 50 mole %, based on the total amount of moles of monomer units within the polyester copolymer, of an oxalate monomer unit;
    • (c) in the range from equal to or more than 0.1 mole % to equal to or less than 25 mole %, based on the total amount of moles of monomer units within the polyester copolymer, of one or more linear C2-C12 diol monomer units, wherein such one or more linear C2-C12 diol monomer units is/are derived from one or more linear C2-C12 diols; and
    • (d) optionally equal to or more than 0 mole % to equal to or less than 5 mole %, based on the total amount of moles of monomer units within the polyester copolymer, of one or more additional monomer units.
A process for producing such a polyester copolymer, a composition containing such polyester copolymer, a method for manufacturing an article comprising the use of one or more of such polyester copolymers and an article obtained or obtainable by such a method.
Owner:AVANTIUM KNOWLEDGE CENT BV

A kind of preparation method of high-purity galacto-oligosaccharide co-production galactitol

ActiveCN103667391BHigh purityLow in miscellaneous sugarsFermentationChromatographic separationLactase
The invention relates to a preparation method for coproducing high-purity galactooligosaccharide and galactitol, which comprises the following steps: a) enabling galactosy transferase to act on a lactose solution, thus generating a galactooligosaccharide mixed saccharide solution; b) purifying galactooligosaccharide and miscellaneous saccharide components containing lactose, glucose and the like through a chromatographic separation technology, wherein the purity of the galactooligosaccharide is up to 90% or above; c) degrading the purified and separated miscellaneous saccharides by using lactase; d) by taking skeletal nickel as a catalyst, under the conditions that the temperature is 80-130 DEG C and the pressure is 8-12 Mpa, performing hydrogenation reaction on the enzyme-degraded miscellaneous saccharide components, thus preparing mixed saccharide alcohol; e) performing chromatographic separation and purification on the hydrogenated mixed saccharide alcohol solution, thus producing high-purity galactitol and miscellaneous alcohol components containing sorbitol and the like; and f) respectively performing activated carbon decoloring, ion exchange desalting and vacuum concentration on the galactooligosaccharide, galactitol and sorbitol after chromatographic separation, thus obtaining corresponding products.
Owner:SHANDONG BAILONG CHUANGYUAN BIO TECH

Polyester copolymer

InactiveCN110914334APolyesterIditol
A polyester copolymer, having a number average molecular weight of equal to or more than 4000 grams / mole and having a glass transition temperature of less than 160 DEG C, containing: (a) in the rangefrom equal to or more than 45 mole % to equal to or less than 50 mole %, based on the total amount of moles of monomer units within the polyester copolymer, of one or more bicyclic diol monomer units,wherein such one or more bicyclic diol monomer units is / are derived from one or more bicyclic diols chosen from the group consisting of isosorbide, isoidide, isomannide, 2,3:4,5-di-O-methylene-galactitol and 2,4:3,5-di-O-methylene-D-mannitol; (b) in the range from equal to or more than 25 mole % to equal to or less than 49.9 mole %, based on the total amount of moles of monomer units within the polyester copolymer, of an oxalate monomer unit; (c) in the range from equal to or more than 0.1 mole % to equal to or less than 25 mole %, based on the total amount of moles of monomer units within the polyester copolymer, of one or more linear C3-C12 dicarboxylate monomer units; and (d) optionally equal to or more than 0 mole % to equal to or less than 5 mole %, based on the total amount of molesof monomer units within the polyester copolymer, of one or more additional monomer units. A process for producing such a polyester copolymer, a composition containing such polyester copolymer, a method for manufacturing an article comprising the use of one or more of such polyester copolymers and an article obtained or obtainable by such a method.
Owner:AVANTIUM KNOWLEDGE CENT BV

Immobilized sorbitol dehydrogenase as well as immobilization method and application of immobilized sorbitol dehydrogenase

The invention discloses immobilized sorbitol dehydrogenase as well as an immobilization method and application of immobilized sorbitol dehydrogenase. A mesoporous material SBA15 with an adaptive pore diameter is used as a carrier and free sorbitol dehydrogenase is immobilized under a proper pH (Potential of Hydrogen) condition to obtain immobilized enzyme of the sorbitol dehydrogenase; and the prepared immobilized sorbitol dehydrogenase is used as a catalyst, and 20U-300U of NADH (Nicotinamide Adenine Dinucleotide Hydrogen) oxidase and 0.05mmol/L-0.5mmol/L of NAD<+> are added under the conditions that the concentration of a primer (sorbitol or D-galactitol or L-iditol) is 1.5g/L-100g/L and react for 3h-12h under the conditions that the pH is 8.0-9.0, the temperature is 20 DEG C-30 DEG C and the speed is 180rpm-280rpm, so as to obtain D-fructose (or D-tagatose or L-sorbose); after reaction is finished, a solution is filtered and the sorbitol dehydrogenase is recycled; and 75% of catalytic activity can still be kept after the sorbitol dehydrogenase is repeatedly used for 5 times. According to the immobilized sorbitol dehydrogenase disclosed by the invention, immobilization condition optimization is carried out through computer simulation, the immobilization efficiency is high and the protein supporting quantity reaches 545mg/g.
Owner:NANJING UNIV OF TECH
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