150results about "Purification using ion-exchange materials" patented technology

A reverse phase column chromatographic process of purification of 6-acetyl-4,1′,6′trichlorogalactose and 4,1′,6′trichlorogalactose is described which uses silanized silica as stationary phase and water or predominatly aqeous mixture derived from water and small proportion of organic solvents as a mobile phase.

An acid recovery system used in a hydrolysis operation includes a chromatographic unit to provide initial separation of sugar and acid. The sugar product provided by the chromatographic unit is processed to produce higher value products, such as ethanol. The remaining acid is contaminated by sugar. A nanofiltration unit containing a nanofilter membrane processes the sugar contaminated acid. The acid is allowed to permeate across the nanofilter membrane while sugar is rejected. The permeate is provided to a conventional acid recovery system and recycled for use in the hydrolysis process.

The invention relates to a system and a process for fractionating a solution into two or more fractions. The system of the invention comprises at least two compartments having a diameter of at least about one meter and including a uniform packing of a polymer-based ion exchange resin with a bead size in the range of about 50 to about 250 mum. The mixing volume of the fluid fronts in the system of the invention is not more than 5% of the volume of the compartment.

The invention discloses a technology for refining saccharose. The technology comprises specific steps of juicing, pretreating, micro-filtering by a membrane, pre-concentrating, decoloring through ion exchange, desalting, evaporating and concentrating through MVR (mechanical vapor recompression), crystallizing, separating through centrifuging, and drying so as to obtain the saccharose crystal. The technology has the advantages that ceramic microfiltration substitutes for sedimentation by sheet frames and lime, so that the step of ultrafiltration is saved; due to concentration by the membrane, the evaporation capacity of evaporation and concentration equipment is reduced, the energy consumption is lowered, and part of inorganic salt is removed; the technology of decoloring and removing impurities through ion exchange substitutes for the technology of stoving, so that the problem of residual sulphur in the saccharose is solved, and the quality of the product is improved; the manner of ion exchange can effectively remove the salt in cane juice; energy consumption is effectively lowered due to the MVR; by adopting the membrane concentration and separation and ion exchange equipment, the floor space of the equipment is reduced, and investment of capital construction is lowered.

Surface-treated carboxyalkylated polysaccharides comprising a biobased content of at least 82% are described herein. The surface-treated carboxyalkylated polysaccharides comprise a CRC of at least 18 g/g, a FSC of at least 26 g/g, and an AUL at 0.7 psi of at least 14 g/g. Processes for the manufacture of surface-treated carboxyalkylated polysaccharides are also described herein.

The invention relates to the use of a weakly acid cation exchange resin for chromatographic separation of carbohydrates. In the invention the hydrophilic/hydrophobic interaction of carbohydrates, sugars and sugar alcohols with the weakly acid cation exchange resin is utilized. The weakly acid cation exchange resin is used for separation of hydrophobic saccharides, such as deoxy, methyl and anhydrosugars and anhydrosugaralcohols from more hydrophilic saccharides.

The present invention relates to a chromatographic separation process for fractionating solutions containing sugars, sugar alcohols, sugar acids and/or betaine by utilizing fractions comprising parts of the separation profile as a substituent of the eluent in a novel and inventive manner. The starting solutions are typically multicomponent plant-based extracts and hydrolysates, stillages, and fermentation products and derivatives thereof. The process prow vides improved separation capacity and separation efficiency without affecting the yield or purity of product components, such as sugars, sugar alcohols, sugar acids, and betaine. The process can especially be applied to sequential SMB separation systems.

A method for separating sucrose and a second dissolved component from a sucrose-containing solution, preferably a beet-derived sucrose-containing solution, wherein the solution is subjected to a first fractionation by a continuous or sequential chromatographic simulated moving bed process to yield a sucrose-enriched fraction and a fraction enriched with the second dissolved component. The resulting fraction enriched with the second component is subjected to a second chromatographic fractionation that is a simulated moving bed or batch type process, to yield a second sucrose-enriched fraction and a second fraction enriched with the second dissolved component wherein both fractions have an improved yield or purity.

The invention relates to a method for separating betaine from fermentation process solutions, vinasse and other sugar beet based solutions on a weakly acid cation exchange resin in H⁺-form in the chromatographic separation process. The present invention relates also to use of a weakly acid cation exchange resin in H⁺-form for the chromatographic separation of betaine.

The invention provides a production process and a production device of golden sugar. The production process comprises the following steps: pressing sugarcane or beets to obtain cane sugar juice; pre-filtering the cane sugar juice through a coarse filter and feeding the pre-filtered crane sugar juice into a microfiltration membrane for filtering to obtain clear cane sugar juice; pre-concentrating the clear cane sugar juice to obtain a pre-concentrated solution; feeding the pre-concentrated solution into ion exchange resin for desalting to obtain a permeation solution; feeding the permeation solution into an evaporator for concentrating to obtain cane sugar concentrated liquid; heating the cane sugar concentrated liquid to be oversaturated, adding crystal seeds, naturally cooling and crystallizing, and centrifuging the obtained crystals to obtain golden sugar crystals; drying the golden sugar crystals to obtain a finished product of the golden sugar. The production device comprises the coarse filter, a microfiltration membrane filter, a nanofiltration membrane filter, an anion exchange resin bed, a cation exchange resin bed and the evaporator which are connected in sequence. The production method provided by the invention is capable of continuously producing high-quality golden sugar, the chromatic value of the obtained product is 800-3,000, the desalting rate is high, and the yield is high.

The invention relates to the recovery of deoxy sugars, such as fucose from biomass-derived solutions, such as spent liquors obtained from pulping processes. The invention is based on the use of chromatographic fractionation with specific column packing materials and combinations thereof. The deoxy sugar product obtained from the chromatographic fractionation may be further purified by crystallization. The invention also provides a novel crystalline fucose product and a novel process for the crystallization of fucose.

A method for purifying a sucrose material already in a high purity liquid, crystalline or other form of sucrose, such as raw sugar, utilizing chromatography, or utilizing chromatography in connection with other methods of purification.

The invention provides a purification method for HFCS (high fructose corn syrup) in a fructose production process. According to the purification method, the HFCS is obtained after cane juice is subjected to neutralization-hydrolysis in a medicinal anhydrous crystalline fructose production process adopting sugarcane as a raw material, the HFCS is decolorized with activated carbon, subjected to ion exchange twice and then separated through chromatography, a fructose rich liquid is obtained, the fructose rich liquid enters a nanofiltration membrane system, a high-purity fructose dialysate and a high fructose corn concentrated solution are filtered out respectively, the high-purity fructose dialysate is used for producing 99.9% crystalline fructose, and the high fructose corn concentrated solution is applied to beverage-grade high fructose corn. According to the purification method, devices and technological parameters of all working procedures are comprehensively optimized and reasonably matched to meet industrial production requirements, equipment input and production cost are greatly reduced, the one-time yield of industrially produced crystalline fructose products is up to 50%, the technical content of fructose production is increased, and the problem about the situation of heavy dependence on import of high-quality medicinal fructose is solved.

The invention relates to a separation process of fractionating a solution comprising betaine and sucrose by subjecting said solution to chromatographic fractionation and nanofiltration and recovering a fraction enriched in betaine and optionally a fraction enriched in sucrose. The solution to be fractionated in accordance with the present invention is typically a sugar beet-derived solution, for instance a molasses solution.

An apparatus for softening, desalting, dealkalizing, decoloring and refining the sugar juice of beet is disclosed. It can be used to perform such steps as pretreating, high-acidity cationic exchanging for softening it, mixing with the pressure water containing CO2 and CaO, low-basicity anionic exchanging for converting the inorganic salts of Ca and Mg to dicarbonate or hydroxide, depositing for desalting, filtering, low-acidity cationic exchanging for dealkalizing, and low-basicity anionic exchanging for decoloring.