Process for the preparation of 1,4-dioxane-2,5-diones, new piperazonium salts of alpha-hydroxycarboxylic acids and fermentation process for the production of organic aminium lactates

摘要

the invention concerns a process for the production of 1,4 - dioxane - 2.5 - dionen of general formula i $f1 in the r1 and r2 independently hydrogen or a branched or unbranched alkylrest with 1 to 10 c atoms of $a $a new piperazoniumsalze mean of - hydroxycarboxylic acids.the use of heterocyclischen secondary and tertiary amines and aminozuckern for isolation of - hydroxycarboxylic acids, in particular of lactic acid from fermentation media, and a new fermentationsverfahren for manufacture of organic aminiumlactaten.