发明名称 |
Process for preparing 1,6- beta -D-anhydroglucopyranose (levoglucosan) in high purity |
摘要 |
Process of preparing 1,6- beta -D-anhydroglucopyranose (levoglucosan) in high purity is described, where the starting material with a water-content, adjusted to max. 20%, is pyrolyzed, the volatile components are condensed and this distillate is neutralized. After filtration and optional treatment with an adsorbent, the mixture is chromatographically separated over an ion-exchange resin with water as eluent. Levoglucosan containing fractions are concentrated and crystalline levoglucosan is obtained by an evaporation - and/or cooling crystallization from a supersaturated water solution.
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申请公布号 |
US5023330(A) |
申请公布日期 |
1991.06.11 |
申请号 |
US19890302885 |
申请日期 |
1989.01.30 |
申请人 |
SUEDZUCKER-AKTIENGESELLSCHAFT |
发明人 |
GANDER, MICHAEL;RAPP, KNUT M.;SCHIWECK, HUBERT |
分类号 |
C07H3/10;C07H1/08;C07H19/01 |
主分类号 |
C07H3/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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