Glyoxylic acid separation from products of glyoxal oxidation in the form of its calcium salt M. A. Pozdnyakov, K. V. Rubtsov, L. A. Rasskazova, A. Filimoshkin
Material type:
ArticleSubject(s): глиоксиловая кислота | глиоксаль | оксалаты кальция | щавелевая кислотаGenre/Form: статьи в журналах Online resources: Click here to access online
In:
Advanced Materials Research Vol. 1085. P. 74-78Abstract: Synthesis of glyoxylic acid was carried out by oxidation of glyoxal aqueous solutions by nitric acid. Glyoxylic acid and oxalic acid (as a by-product) were isolated from technological mixtures in the form of their calcium salts in a strictly defined region of pH. Previously, model calcium salts were synthesized from the commercial acids as reference objects. The results of infrared spectroscopy and complexometric titration of precipitates of calcium salts of glyoxylic and oxalic acids, isolated in various pH regions, allow one to construct reliable research strategies of complex mixtures, such as obtained from the oxidation products of aqueous solutions of glyoxal.
Synthesis of glyoxylic acid was carried out by oxidation of glyoxal aqueous solutions by nitric acid. Glyoxylic acid and oxalic acid (as a by-product) were isolated from technological mixtures in the form of their calcium salts in a strictly defined region of pH. Previously, model calcium salts were synthesized from the commercial acids as reference objects. The results of infrared spectroscopy and complexometric titration of precipitates of calcium salts of glyoxylic and oxalic acids, isolated in various pH regions, allow one to construct reliable research strategies of complex mixtures, such as obtained from the oxidation products of aqueous solutions of glyoxal.
There are no comments on this title.