Patent ID: 6913776

Claim:
Process for the separation of undesirable substances from wine, said undesirable substances comprising one or more of acetic acid, ethyl acetate, acetaldehyde, sulphur dioxide, and sulphurated organic compounds, said process comprising: preparing wine to be treated (V) inside a container ( 2 ); conveying said wine (V) to be treated to a unit ( 3 ) with at least one porous hydrophobic membrane ( 4 ) having holes ( 5 ) for trapping gas (G) and able to be passed along, on a first side ( 4 ′) of said hydrophobic membrane, by said wine to be treated (V) and, on a second side ( 4 ″) of said membrane, by an extraction liquid (L) having an alcoholic content similar to that of said wine (V) to be treated and made to circulate inside a purification circuit ( 8 ); removing undesirable volatile substances from said wine to be treated (V) by evaporation on said first side ( 4 ′) of the membrane ( 4 ) and subsequent diffusion thereof in said gas (G) trapped in said membrane ( 4 ) and consequent condensation of said volatile substances on said second side ( 4 ″) of the membrane ( 4 ), with the formation of a contaminated liquid (L′) which is formed by said extraction liquid (L) and by the permeated volatile substances, and a retained fraction which is formed by said treated wine (V′) purified of said permeated volatile substances; conveying said contaminated liquid (L′) into a separation unit ( 9 ) by said purification circuit ( 8 ); removing in said separation unit ( 9 ) said volatile substances from said contaminated liquid (L′) with consequent regeneration of said extraction liquid (L) and obtaining a regenerated extraction liquid (L); re-introducing said regenerated extraction liquid (L) into said purification circuit ( 8 ); the quantity of said extrction liquid (L) not exceeding the ratio of 1/50 th of the quantity of said wine to be treated (V).