US Patent No. 10,920,257

METHOD OF PRODUCING HIGH PURITY D-PSICOSE


Patent No. 10,920,257
Issue Date February 16, 2021
Title Method Of Producing High Purity D-psicose
Inventorship Joo Hang Lee, Ansan (KR)
Min Hoe Kim, Incheon (KR)
Seong Bo Kim, Seongnam (KR)
Seung Won Park, Yongin (KR)
Assignee CJ CHEILJEDANG CORPORATION, Seoul (KR)

Claim of US Patent No. 10,920,257

1. A method of producing D-psicose, comprising:subjecting D-fructose to D-psicose epimerization to produce a D-psicose-containing solution,
subjecting the D-psicose-containing solution to first cooling and ion exchange purification,
subjecting the purified D-psicose-containing solution to first concentration and second cooling,
subjecting the D-psicose-containing solution, which has been subjected to first concentration and second cooling, to chromatography to obtain a D-fructose-containing mother liquor and a D-psicose-containing separated solution, and
subjecting the D-psicose-containing separated solution to second concentration and third cooling to crystallize D-psicose and thereby obtaining D-psicose crystals produced through D-psicose crystallization and a mother liquor containing a remaining D-psicose,
wherein the D-fructose-containing mother liquor produced by chromatography is reused in the D-psicose epimerization, and
wherein the mother liquor containing the remaining D-psicose is reused in the first cooling and ion purification, the first concentration and second cooling, or the chromatography.