膜渗透蒸发用于葡萄酒脱醇的实验研究

Experimental Research on Dealcoholization of Wine by Pervaporation

利用自制的PDMS平板复合膜 ,在 40℃ ,1330Pa下游侧压力下 ,φ(C2 H5OH) =11 5 %的红葡萄酒经过渗透蒸发脱醇后可获得 φ(C2 H5OH) =7%、4%、3%等各种低醇红葡萄酒 ,同时渗透液可勾兑成 φ(C2 H5OH) =30 %～ 5 0 %的高醇白兰地 ,平均总渗透通量达 145 5 g/(m2 ·h)。在小试实验中 ,低醇葡萄酒和高醇白兰地的平均生产强度分别是 4830和 780mL/(m2 ·h)。国家资深评酒专家对两种新酒品都给予了高度评价 ,认为有一定的市场经济价值。

A novel flat composite PDMS membrane was used to remove ethanol from wines with φ(C 2H 5OH)=11.5% by pervaporation.At 40 ℃ and 1330 Pa downstream pressure.New wines with φ(C 2H 5OH)=7%,4% and 3% were obtained in varied operation period, and the dialysate can also be used to produce high-alcohol beverage such as brandy with φ(C 2H 5OH)=30%-50%.The average total permeation flux reached 1455 g/(m 2·h).In the miniature industry experiment,the throughput of new low-alcohol wine and high-alcohol brandy reached 4830 and 780 mL/(m 2·h)respectively.Some qualified testers gave marvelous comments on the results.Experiments indicate that wine dealcoholization by pervaporation is greatly promising and has an excellent application perspective in wine industry.