I need to remove Hydroquinone inhibitors from Acrylic acid prior to use. For that I need to do vaccum distillation of Acrylic Acid under reduced pressure with copper shavings in the distillation flask. However, I am unable to find the specific temperature at which the distillation can be done. Boiling point of Acrlyic acid is 144 degree however it is also mentioned in some places that acrylic acid can be explosive if excessive heating is done. But any specific or recommended temperature for distillation is not mentioned anywhere. Have been searching for past 2 weeks. Kindly Help.
Dear Bhuman, many thanks for sharing this interesting chemical problem with the RG community. Indeed, I would not suggest to distil acrylic acid at normal pressure. Please find cited below a protocol which has been published in "Organic Syntheses". The procedures published there are always very reliable because they have been checked by independent chemists. The boiling point of acrylic acid is given here as 69–71°/50 mm or 53–56°/25 mm.
http://www.orgsyn.org/demo.aspx?prep=CV3P0030 (Acrylic acid)
(please see attached pdf file).
Good luck with your work and best wishes, Frank Edelmann
Hello Bhuman,
set the pressure to a range, that the Acrylic Acid destills at about 60 - 70 °C and don't use an inert gas like Nitrogen or Argon. Oxigen must be pressend in traces to avoid polymerisation!
Good luck!
Andreas
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