Рефераты

Патент №DE0426649 Process for the stepwise electrodialysis of alkali sulfate-containing aqueous solutions and apparatus for carrying out the process.

For the stepwise electrodialysis of aqueous solutions containing alkali metal sulphate, these solutions being passed through a plurality of electrodialysis cells which operate in series and have an acid chamber and base chamber and include a cation exchanger membrane, the aqueous solutions containing alkali metal sulphate are passed exclusively through acid chambers of the electrodialysis cells which, in their interior, exclusively include cation exchanger membranes and are bounded by bipolar ion exchanger membranes. The invention allows improved electrodialytic processing of solutions containing alkali metal sulphate, such as are obtained in the production of regenerated

Патент us№4227981 Еlectrodialysis of acid whey

Reduction of ash and titratable acidity in liquid whey is accomplished by electrodialysis, without substantial precipitate formation, by passing at least a portion of the whey through a demineralization unit composed of a number of whey streams each bounded on both sides by brine streams, the streams being separated by cation and anion membranes arranged in an alternate sequence; and passing at least a portion of the whey through a deacidification unit composed of a plurality of whey streams bounded by a brine stream on one side and by a caustic solution stream on the other, the streams being separated by the sequence of cation-anion-anion-cation-etc., membranes wherein the whey stream is disposed between a pair of anion membranes.

Патент №ер0315135 а process for the demineralization of whey or a liquid based on whey and for producing an acid mixture and a base mixture useful in food industries

The invention relates to a process for removing at least a portion of salts contained in whey or a liquid based on whey by means of electrolysis while producing an acid mixture and a base mixture usable in food industries, in the process a four-compartment electrolytic cell (1) is used in the electrolysis of the whey or the liquid based on whey. The four compartments (А, В, С, D) between an anode plate (2) and a cathode plate (6) are separated from each other by means of ion exchange membranes (3, 4, 5) and an independent liquid recirculation (7, 8, 9, 10) is connected with each one of the four compartments of the electrolytic cell.

Патент №us5223107 Improved electrodialysis method for demineralization of liquid, whey-based material

A process for demineralization of whey-based material using electrodialysis. The process involves increasing the conductivity of the diluting stream, i.e, the stream containing the material to be demineralized, at one or more points in time during the electrodialysis cycle. When removal of divalent ions is desired, the increased conductivity may occur by the addition of salts of monovalent ions.

Патент №ер2408311 Whey or raw milk demineralisation and fractionation

A process for the demineralisation and fractionation of cheese whey or raw milk comprising the steps of: a) subjecting the whey or raw milk to ultrafiltration to provide a retentate fraction and a permeate fraction; b) concentrating the permeate fraction by means of nanofiltration; c) subjecting the nanofiltration retentate to ion permeation chromatography at elevated temperatures of between 50°C and 80°C using an appropriate resin; and d) eluting the nanofiltration retentate with water in various fractions to obtain fractions which may be low in mineral content and/or high in 3 '-sialyl lactose content and/or high in other desirable components.

Патент №EP2408794 Isolation and purification of components of whey 

 A process for the isolation and/or purification of a desired component, particularly 3'sialyl lactose, from whey, particularly cheese whey, comprising the steps of: optionally subjecting the whey to ultrafiltration to provide a protein concentrate and a whey permeate; contacting the whey or whey permeate with at least one series of ion exchange resins, said series comprising a first weak acid cation resin, a first weak base anion resin, a second strong acid cation resin, a second weak base anion resin to demineralise the whey permeate; contacting this demineralised permeate with two final ion exchange resins comprising a strong acid cation resin and a final weak base anion resin, wherein the desired component, such as 3' sialyl lactose, is taken up on the final anion resin; and eluting the desired component from the final anion resin.