FIELD: chemistry.
SUBSTANCE: method for isolating caprolactam from caprolactam- and its oligomer-containing polymers, consists in the process of removing caprolactam and drying the polyamide-6 granulate using nitrogen as a caprolactam transfer agent in a laminar mode. Polyamide-6 is treated with a stream of nitrogen heated to a temperature of 140-160°C, with a feed rate of 14-40 l/h.
EFFECT: elimination of the oligomer losses with simultaneous improvement of the process due to the elimination of contamination of the pipelines by the crystallized oligomers.
2 cl, 1 tbl, 12 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF SYNTHESIS OF CAPROLACTAM FROM CAPROLACTAM-CONTAINING POLYMERS (VARIANTS) AND DEVICE FOR ITS REALIZATION | 1995 |
|
RU2154059C2 |
| METHOD OF PREPARING CAPROLACTAM BY DEPOLYMERIZATION OF MIXTURES WHICH COMPRISE POLYMERS OF MOLDED THERMOPLASTIC MATERIALS | 1995 |
|
RU2160253C2 |
| METHOD OF RECOVERING CAPROLACTAM FROM CAPROLACTAM CONTAINING POLYMERS, AND DEVICE FOR A CARRYING IT THROUGH | 1995 |
|
RU2159233C2 |
| METHOD OF PREPARING CAPROLACTAM | 1995 |
|
RU2167862C2 |
| PROCESS FOR THE RECOVERY OF ε-CAPROLACTAM FROM EXTRACT WATER | 2014 |
|
RU2652114C2 |
| METHOD FOR PRODUCTION OF COPOLYAMIDES | 1992 |
|
RU2072369C1 |
| METHOD FOR EXTRACTION OF WATER IN PRODUCTION OF POLYAMIDE-6 | 2016 |
|
RU2605694C1 |
| THERMOPLASTIC POLYMER COMPOSITION CONTAINING HYPER-BRANCHED POLYMER AND PRODUCTS MANUFACTURED FROM THIS COMPOSITION | 2002 |
|
RU2318007C2 |
| METHOD OF PRODUCING POLYAMIDE-6 | 2023 |
|
RU2814244C1 |
| 0 |
|
SU283942A1 |
