Formation of aminium lactates in lactic acid fermentation preparation and characterization of 1,4‐piperazinium‐(L,L)‐dilactate obtained from L(+)‐lactic acid (part I)

摘要: The potential for the production of 1,4-piperazinium-(L, L)-dilactate from L(+)-lactic acid preparations obtained by fermentation was studied. Piperazinium dilactate found to be a very suitable source material poly(lactic acid) production. In novel polymerization process, intermediate dilactide directly formed in salt melt at moderate temperature. High-performance cultivation Lactobacillus paracasei on glucose-MRS medium carried out using high-viability inocula. After cell mass had been removed broth centrifugation and/or ultrafiltration, lactic solution concentrated 45% [w/w] two-stage electrodialysis process. Two methods preparing 1,4-piperazinium were developed: first medium-concentrated (45%) and second highly-concentrated (85%) evaporation one. Because there no physical data specialized literature, pure product characterized according its solubility characteristics, melting point spectroscopic analysis.