A method for producing erythritol using mother liquor is prepared by mixing a sugar alcohol products

The present invention discloses a method of producing erythritol using mother liquor is prepared by mixing a sugar alcohol products, the waste liquor is diluted erythritol production of sugar added, decolorized with charcoal, then nanofiltration membrane filtration, ion-exchange resins desalted decoloration, concentration crystallization recovering erythritol, the remaining mother liquor was concentrated directly or after the bleaching and concentrated is mixed sugar alcohol crystals, the crystallization mother liquor returns the remaining mother liquor or initial liquor recovered erythritol be recycled, mixed sugar alcohol crystals were dried sugar alcohol products obtained after mixing. The present invention can be an active ingredient erythritol production of complete recovery of the mother liquor, complete elimination of the waste of resources and pollution of the mother liquor, has a broad application prospect.