Preparation of color stable glycosides

Abstract

Abstract PROCESSES FOR PRODUCING COLOR STABLE GLYCOSIDES ARE DISCLOSED. THE PROCESSES USED MAY BE DIVIDED INTO TWO SEPARATE TYPES, (1) AQUEOUS PROCESSES AND (2) NONAQUEOUS PROCESSES. THE AQUEOUS PROCESSES CONTEMPLATED GENERALLY COMPRISE DISSOLVING A SACCHARIDE IN AN EXCESS OF ALCOHOL AND REACTING THESE TWO INGREDIENTS IN THE PRESENCE OF AN ACID CATALYST AT ELEVATED TEMPERATURES TO THEREBY FORM A CRUDE GLYCOSIDE-ALCOHOL MIXTURE. THIS MIXTURE IS THEN COLLED AND NEUTRALIZED WHEREINAFTER THE ALCOHOL IN THE MIXTURE IS PARTIALLY REPLACED BY WATER. THIS WATER-GLYCOSIDE MIXTURE IS THEN RUN THROUGH AN ANIONIC EXCHANGE RESIN OF A SELECTED TYPE TO REMOVE SUBSTANTIALLY ALL OF THE REDUCING MATERIALS AND OTHER IMPURITIES THEREFROM TO THEREBY YIELD AN ALKALI COLOR STABLE GLYCOSIDE PRODUCT. THE NONAQUEOUS PROCESS ARE CONDUCTED IN SUBSTANTIALLY THE SAME MANNER AS THE AQUEOUS PROCESSES EXCEPT THAT THE ALCOHOL IN THE MIXTURE IS NOT REPLACED BY WATER. THIS PRODUCT COMING FROM THE ANION EXCHANGE RESIN MAY BE DIRECTLY CRYSTALLIZED TO YIELD A COLOR STABLE SOLID GLYCOSIDE. THE MOTHER LIQUID FROM THE CRYSTALLIZATION STEP MAY BE FURTHER PROCESSED TO THEREBY ACHIEVE A MORE ECONOMIC YIELD.

Inventors

• 👤 Hyman Max Molotsky
• 👤 Arthur Kott

Bibliographic Details