Abstract: A process for producing polyamides makes flow guidance within the process more efficient. In some respects, the process is based on the polymerization of lactam to a polyamide-containing polymer melt, the subsequent granulation of the polymer melt to polyamide granules using granulation liquid, and the subsequent extraction of monomeric and oligomeric constituents from the PA granules in an extraction column. In some examples, a temperature of the granulation liquid before being fed into an extraction liquid stream is lower than a temperature of the extraction liquid stream before the granulation liquid is fed into the extraction liquid stream. The invention relates also to a device for carrying out processes such as this one.

Abstract: The present invention relates to a polymerization device for the production of melts of thermoplastic polymers in which the heat of the discharged product can be recovered and used for preheating of the usable raw materials. In addition, the present invention relates to a corresponding method for the production of thermoplastic polymers.

Abstract: The invention relates to a reactor in the form of a VK tube (VK: simplified continuous), for the polymerisation of polyamides, the reactor being subdivided into an upper and lower reactor region, which are controllable independently of each other. Likewise, the invention relates to a method for the production of polyamides in which such a reactor is used.

Abstract: A process for producing polyamides makes flow guidance within the process more efficient. In some respects, the process is based on the polymerization of lactam to a polyamide-containing polymer melt, the subsequent granulation of the polymer melt to polyamide granules using granulation liquid, and the subsequent extraction of monomeric and oligomeric constituents from the PA granules in an extraction column. In some examples, a temperature of the granulation liquid before being fed into an extraction liquid stream is lower than a temperature of the extraction liquid stream before the granulation liquid is fed into the extraction liquid stream. The invention relates also to a device for carrying out processes such as this one.

Abstract: The present application relates to an extraction reactor with which granular material, in particular granular polyamide, can undergo extraction, soluble components being dissolved out of the granular material with an extraction liquid during the extraction. In the case of polyamide materials, these are for example oligomeric or monomeric components which have remained in the granular material during the polycondensation reaction for the production of the polyamide materials.

Abstract: The invention relates to a conveying device for conveying granular material that is stored in a source (10), for example polyamide 6 (PA6) granules, to multiple receiving points (11, 12, 13, . . . ), the conveying device having a number of injectors (11, 12, 13, . . . ) corresponding to the number of receiving points. Also disclosed is a method for conveying granular material, for example PA6 granules, from a source (10) to multiple receiving points.

Abstract: The invention relates to a reactor in the form of a VK tube (VK: simplified continuous), for the polymerisation of polyamides, the reactor being subdivided into an upper and lower reactor region, which are controllable independently of each other. Likewise, the invention relates to a method for the production of polyamides in which such a reactor is used.

Abstract: The present invention relates to a polymerisation device for the production of melts of thermoplastic polymers in which the heat of the discharged product can be recovered and used for preheating of the usable raw materials. In addition, the present invention relates to a corresponding method for the production of thermoplastic polymers.

Abstract: The invention relates to a conveying device for conveying granular material that is stored in a source (10), for example polyamide 6 (PA6) granules, to multiple receiving points (11,12,13, . . . ), the conveying device having a number of injectors (11,12,13, . . . ) corresponding to the number of receiving points. Also disclosed is a method for conveying granular material, for example PA6 granules, from a source (10) to multiple receiving points.

Abstract: The present disclosure relates to an extraction reactor with which granular material, in particular granular polyamide, can undergo extraction, soluble components being dissolved out of the granular material with an extraction liquid during the extraction. In the case of polyamide materials, these are for example oligomeric or monomeric components which have remained in the granular material during the polycondensation reaction for the production of the polyamide materials.