Industrial process for production of high-purity diol

Details Industrial process for production of high-purity diol Industrial process for production of high-purity diol

2006-12-28

2011-12-06

Witherspoon, Sikarl (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C422S211000, C202S152000

Reexamination Certificate

active

08071819

ABSTRACT:
The invention provides an apparatus and process for producing high-purity diol by taking cyclic carbonate and aliphatic monohydric alcohol as starting materials, continuously feeding the starting materials into column A, carrying out reactive distillation in column A, continuously withdrawing a low boiling point reaction mixture containing a produced dialkyl carbonate and the aliphatic monohydric alcohol from an upper portion of column A, continuously withdrawing a high boiling point reaction mixture containing a produced diol from a lower portion of column A, continuously feeding the high boiling point reaction mixture into distillation column C, distilling off material having a lower boiling point than that of the diol contained in the high boiling point reaction mixture ABas a column top component and/or a side cut component so as to obtain a column bottom component, continuously feeding the column bottom component into distillation column E, and obtaining the diol.

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