초록 ▼

For selective removal of volatile substances from liquids, the initial liquid is fed to a crosscurrent diaphragm separation device (2), in which the permeate consisting of water and volatile substances is separated by increased transdiaphragm pressure and concentration difference. Then, the permeate

For selective removal of volatile substances from liquids, the initial liquid is fed to a crosscurrent diaphragm separation device (2), in which the permeate consisting of water and volatile substances is separated by increased transdiaphragm pressure and concentration difference. Then, the permeate is fed into a further liquid-volatile separation device (8), in which the alcohol is distilled out. The permeate now only consisting of water, salts, acids and extracts is then fed back into the crosscurrent diaphragm separation device (2), where it flows through the permeate side in countercurrent to the flow of the retenate. Excess permeate can be introduced into the dealcoholized initial liquid. By the process according to the invention the economic efficiency of the unit and the quality of the end product are significantly improved.

대표청구항 ▼

Process for selective removal of volatile substances from liquids including alcohol from wine, beer and fermented fruit juices by diaphragm separation processes and at least one additional separation process, the steps comprising subjecting the liquid to a diaphragm separation process in which a tra

Process for selective removal of volatile substances from liquids including alcohol from wine, beer and fermented fruit juices by diaphragm separation processes and at least one additional separation process, the steps comprising subjecting the liquid to a diaphragm separation process in which a transdiaphragm pressure is increased beyond that of a dialysis process such that a permeate consisting mainly of water and volatile substances is separated from the liquid by the increased transdiaphragm pressure and the difference in concentrations, subjecting the permeate to a liquid-volatile separation process to remove a volatile substance therefrom, and feeding back at least partially a residue resulting from the liquid-volatile separation process into the permeate side of the diaphragm separation process.