Removal of heavy metal ions from wine and wine-like beverages
AssigneeBASF SE
InventorsJuergen Detering, Axel Sanner, Bernhard Fussnegger
Life of this patent
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Abstract
A process for removing heavy metal ions from wine and wine-like beverages, which entails treating each 100 l of the beverage with from 5 to 250 g of a polymer which contains, as copolymerized units, from 50 to 99.5% by weight of at least one basic vinylheterocycle with a pK.sub.a of not less than 3.8 and from 0 to 49.5% by weight of another copolymerizable monomer, and which has been prepared with the exclusion of oxygen and of polymerization initiators and in the presence of from 0.5 to 10% by weight, based on the monomers, of a crosslinker.
Claims8
A process for removing heavy metal ions from wine or wine made from drupes, pomes or berries, which comprises contacting, for not less than one minute, each 100 l of said wine or said wine made from drupes, pomes or berries with 5 to 250 g of a polymer which contains, as copolymerized units, from 50 to 99.5% by weight of at least one basic vinylheterocycle with a pK.sub.a of not less than 3.8, and from 0 to 49.5% by weight of another copolymerizable monomer and which has been prepared with the exclusion of oxygen and of polymerization initiators and in the presence of from 0.5 to 10% by weight, based on the monomers, of a crosslinker;
- and then separating said polymer from said wine or said wine made from drupes, pomes or berries.
Dependencies are inferred from the claim text.