Preparation and properties of aldonic acids and their lactones and basic calcium salts

Abstract

abstract Directions are given for the preparation of the crystalline acids and lactones derived from gluconic, mannonic, galactonic, xylonic, arabonic, and rhamnonic acids. The compositions of the basic calcium salts of mannonic, galactonic, xylonic, arabonic, rhamnonic, lactobionic, and maltobionic acids are reported and their use for the purification of sugar acids is described. The utility of dioxane as a solvent in preparing the free sugar acids and their lactones is emphasized. The method for preparing gluconic acid by crystallization from water is suitable for the manufacture of that substance in large quantity.