| 摘要 |
The invention relates to a method for producing polylactic acid, comprising the steps of obtaining lactic acid from starchy agricultural products by fermentation, ultrapurification of the lactic acid by ultrafiltration, nanofiltration and/or electrodialysis, concentration of the lactic acid and production of a prepolymer, cyclizing depolymerisation to dilactide, purification of the dilactide, ring-opening polymerisation of the dilactide and demonomerisation of the polylactide. |
| 申请人 |
INVENTA-FISCHER GMBH & CO. KG;GERKING, LUEDER;HAGEN, RAINER;RICHTER, KLAUS;IDLER, FRANK;REIMANN, WINFRIED;HANZSCH, BERND |
发明人 |
GERKING, LUEDER;HAGEN, RAINER;RICHTER, KLAUS;IDLER, FRANK;REIMANN, WINFRIED;HANZSCH, BERND |
