Multi-stage glycolic acid crystallization
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.
E.I. du Pont de Nemours and Company
B C B B B
B01D C07C B01D B01D B01D
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F. Glenn Rod K. Daniel Albert
Gallagher Hackman Green