| 摘要 |
The concentration of hydrogen fluoride in crude glycolic acid made by the hydrogen fluoride-catalyzed reaction of formaldehyde and carbon monoxide can be reduced to less than about 1% by weight by removing the HF from the crude gylcolic acid by distillation or stripping with inert gas at a temperature above about 130 DEG C., thereby producing a polyglycolide subsequently convertible to glycolic acid by hydrolysis.
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