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摘要

PROBLEM TO BE SOLVED: To provide a method for producing highly pure erythritol crystals, comprising processes successively containing a cell-separating process, a chromatographic separation process and a crystallization process and improved so that the chromatographic separation process and/or the crystallization process can efficiently be carried out. ;SOLUTION: This method for producing highly pure erythritol crystals comprises disposing a concentration process under conditions comprising an operation pressure of 70-300 Torr and a liquid temperature of 45-80°C between a cell-separating process and a chromatographic separation process and/or between the chromatographic separation process and a crystallization process.;COPYRIGHT: (C)1999,JPO