When using activated carbon to treat wine, the amount of activated carbon must be controlled
In liquor production, the basic requirements for selecting activated carbon are:
(1) After turbidity removal treatment The high-quality liquor can not only maintain the flavor of the original liquor, but also stop being turbid within a certain low temperature range. Different activated carbons have different adsorption effects on the main fragrance substances ethyl hexanoate and higher fatty acid ethyl ester. Only by choosing activated carbon with a pore size greater than 2.0nm can we meet the requirements of the production process, remove turbidity and maintain quality
(2) The adsorbent should not dissolve in liquor, nor should there be any leachables. Ethanol solution is a good solvent, and it is extremely difficult for the chemical components of the adsorbent not to dissolve in it, but at least the solubility of the adsorbent in it should be very small [3]. Therefore, when choosing activated carbon to treat low-alcohol liquor, the adsorption and chemical properties of each batch of products should be verified based on actual conditions such as wine quality, alcohol content, and wine temperature to ensure the stability of product quality during its shelf life.
4.2 According to the precipitation formation mechanism, the chemical reaction formula of the precipitate in wine can be expressed as "anion (A-) + metal cation (B+) → salt substance", when [A-][B+] > When SCP, that is, when the product of the concentration of anions and cations is greater than its (article source: Huaxia Wine News·China Wine News Network) solubility product (SCP), precipitation will gradually occur under a certain temperature and time. The results of the wine body verification test show that when the concentration product of phosphorus and iron ions in wine is ≥0.80, a chemical reaction can occur under certain conditions, producing a white flocculent precipitate during the shelf life. The higher the alcohol content and temperature, the longer the storage time. , the precipitation phenomenon is more obvious. Due to technical limitations, the impact of other metal element contents on precipitation needs further analysis and research.