Purification of hop extracts
阅读：924发布：2021-01-19
专利汇可以提供Purification of hop extracts专利检索，专利查询，专利分析的服务。并且Xanthohumol is removed from a hop extract solution by treatment with a polyamide, for example by passing the solution down a chromatographic column of polyamide or by slurrying together and separating the insoluble polyamide. Polyvinyl pyrrolidone is preferred. The treated extract can be used in brewing with or without further treatment.，下面是Purification of hop extracts专利的具体信息内容。
2. The improvement as claimed in claim 1 wherein the solvent is methanol.
3. A method of removing xaNthohumol from a hop extract which comprises the steps of making a solution of a hop extract in a suitable solvent, contacting the solution with a polyvinyl pyrrolidone in insoluble form to sequester the xanthohumol and separating the solution from the polyvinyl pyrrolidone.
4. A method of separating soft resins and hard resins in a hop extract containing soft and hard resins which comprises the steps of making a solution of the hop extract in methanol, contacting the solution with a polyvinyl pyrrolidone in insoluble form to remove xanthohumol from the solution, separating the solution from the polyvinyl pyrrolidone, and extracting the solution with petroleum spirit to separate the soft resins from the remaining hard resins.
5. A method according to claim 1 wherein the hop extract solution is contacted with the polyvinyl pyrrolidone by passing the solution through a chromatographic column of the polyvinyl pyrrolidone in insoluble form.
6. A method according to claim 5 including the further steps of subsequently eluting the removed xanthohumol from the chromatographic column with water-saturated ethyl acetate.
7. A method according to claim 1 wherein the hop extract solution is contacted with the polyvinyl pyrrolidone by slurrying the solution with the polyvinyl pyrrolidone in insoluble form.
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