| Patent application number | Description | Published |
| 20100249364 | CLEANING DEVICE FOR SEPARATING DILACTIDE FROM MIXTURES, POLYMERISATION DEVICE, METHOD FOR SEPARATING DILACTIDE FROM MIXTURES AND USE THEREOF - The present invention relates to a device for separating a biodegradable, intermolecular cyclic diester of an alpha-hydroxycarboxylic acid from material mixtures which contain in addition the alpha-hydroxycarboxylic acid of the diester corresponding thereto. In particular, the diester is thereby dilactide and the acid lactic acid. Furthermore, the present invention relates to a method for separating dilactide from material mixtures, which is based on a modified, distillative method. In addition, the present invention describes a polymerisation device, in particular for preparing polylactide. Likewise, purposes of use of both the devices and of the method are indicated. | 09-30-2010 |
| 20100252076 | CONDENSATION AND WASHING DEVICE, POLYMERISATION DEVICE AND METHOD FOR CLEANING PROCESS STEAM DURING THE PRODUCTION OF THE POLYLACTIDE - The present invention relates to a condensation and washing device with which in particular the process vapours which occur during the production of polylactide can be processed and cleaned. Furthermore, the present invention relates to a polymerisation device for the production of polylactide and also to a method for processing process vapours which occur during the production of polylactide; possibilities for use of both the condensation and washing devices and of the method are likewise mentioned. | 10-07-2010 |
| 20100261838 | POLYMERISATION REACTOR, POLYMERISATION DEVICE, METHOD FOR PRODUCING BIO-DEGRADEABLE POLYESTER AND USES - The present invention relates to a polymerisation reactor for continuous polymerisation, the reactor being constructed in two stages and comprising a prepolymerisation stage which is configured as a stirred vessel or as a loop-type bubble column and also a main polymerisation stage which is configured as a tubular reactor. Furthermore, the present invention relates to a method for the production of biodegradable polyester, in particular polylactide, the reactor according to the invention being used. Likewise, the invention relates to a polymerisation device which comprises further components in addition to the polymerisation reactor. | 10-14-2010 |