TREA

D-ALLOSE CRYSTAL AND PRODUCTION METHOD THEREOF

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Information

  • Patent Application
  • 20230295208
  • Publication Number
    20230295208
  • Date Filed
    April 24, 2023
    a year ago
  • Date Published
    September 21, 2023
    8 months ago
Information
Abstract
High-purity hydrous D-allose crystals and a method of efficiently obtaining the crystals are provided. To a D-allose-containing solution having a purity of D-allose of at least 80% (g/g) in a solute, in a metastable region in a supersaturated state of 30° C. or less, D-allose seed crystals are added. Then, the temperature of the solution is lowered by 10° C. or more for cooling and crystallization to initially obtain “hydrous D-allose crystals”, and the crystallization water thereof is removed in a specified temperature zone to obtain novel “anhydrous D-allose crystals”.
Description
Claims
  • 1. An anhydrous D-allose crystal satisfying the following (A) and (B): (A) a purity of 99% or more(B) a repose angle of less than 46 degrees.
  • 2. The anhydrous D-allose crystal according to claim 1, further satisfying the following (C): (C) an aspect ratio of a particle of 1.0 to 10.
  • 3. The anhydrous D-allose crystal according to claim 1, further satisfying the following (D): (D) an average particle size of 200 to 800 µm.
Priority Claims (1)
Number Date Country Kind
2019-222673 Dec 2019 JP national
Divisions (1)
Number Date Country
Parent 17116039 Dec 2020 US
Child 18138510 US