发明名称 |
Multi-stage glycolic acid crystallization |
摘要 |
The present invention relates to a high yield process to prepare high purity crystalline glycolic acid using a multi-loop crystallization process characterized by high liquid and/or solid recycle, said process suitable for large scale purification and producing high purity glycolic acid with low diglycolic acid content.
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申请公布号 |
US7439391(B2) |
申请公布日期 |
2008.10.21 |
申请号 |
US20070974346 |
申请日期 |
2007.10.11 |
申请人 |
E.I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
GALLAGHER F. GLENN;HACKMAN ROD K.;GREEN DANIEL ALBERT |
分类号 |
C07C51/43 |
主分类号 |
C07C51/43 |
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