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公开(公告)号:US5998634A
公开(公告)日:1999-12-07
申请号:US270194
申请日:1999-03-15
IPC分类号: C07D307/62
CPC分类号: C07D307/62
摘要: A method is provided for producing L-ascorbic acid (Vitamin-C) in a single process step. Starting material, particularly a mixture of compounds from the group consisting of glucose, sorbitol, sorbose, and 2-keto-L-gulonic acid, is catalytically oxidized in aqueous solution by hypochlorous acid. L-ascorbic acid then can be separated from the aqueous solution, and the unconverted reactants recycled for greater conversion. The reaction occurs in the aqueous state at ambient temperature near a pH of 5.5 when an optimum amount of hydrous cobalt-oxide is present in the solution.
摘要翻译: 提供了在单一工艺步骤中生产L-抗坏血酸(维生素C)的方法。 原料,特别是葡萄糖,山梨糖醇,山梨糖和2-酮-L-古洛糖酸组成的组的混合物在水溶液中被次氯酸催化氧化。 然后可以将L-抗坏血酸与水溶液分离,并且将未转化的反应物再循环以获得更大的转化率。 当溶液中存在最佳量的含水钴氧化物时,反应在环境温度接近pH 5.5的水性状态下发生。