Process for preparing a particularly pure glycolic acid

C - Chemistry – Metallurgy – 07 – C

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C07C 59/06 (2006.01) C07C 51/367 (2006.01) C07C 51/42 (2006.01)

Patent

CA 2194739

The present invention relates to a process for preparing a particularly pure glycolic acid by saponification with chloroacetic acid with an excess of alkali metal hydroxide, with the resulting alkali metal chloride being filtered off, and the 20 to 70% strength by weight glycolic acid solution being subsequently subjected to anelectrodialysis at 20 to 40°C and a cell voltage of 0.5 to 2.5 V per cell pair. The process of the invention permits optimum removal of sodium chloride and chloroacetic acid as necessary for preparing a particularly pure glycolic acid. Other organic acids, nitrogen compounds, aldehydes and salts are not produced in this process and thus do not affect the product quality.

La présente invention concerne un procédé de préparation d'acide glycolique particulièrement pur par saponification avec de l'acide chloracétique en présence d'un excès d'hydroxyde de métal alcalin; le chlorure de métal alcalin résultant est éliminé par filtration et la solution d'acide glycolique de concentration de 20 à 70 % en poids est soumise à une électrodialyse à 20 à 40 degrés C et sous une tension de bain de 0,5 à 2,5 V par paire de cellules d'électrodialyse. Le procédé de la présente invention permet l'élimination optimale du chlorure de sodium et de l'acide chloracétique comme l'exige la préparation d'un acide glycolique particulièrement pur. D'autres acides organiques, composés azotés, aldéhydes et sels ne sont pas produits au cours de ce procédé et, par conséquent, n'ont pas d'incidence sur la qualité du produit.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Process for preparing a particularly pure glycolic acid does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing a particularly pure glycolic acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing a particularly pure glycolic acid will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1515670

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.