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公开(公告)号：US11066518B2
公开(公告)日：2021-07-20
申请号：US16140667
申请日：2018-09-25
申请人： Technip Zimmer GmbH
发明人： Stefan Deiss , Raimund Schwarz , Martin Baumert , Gerald Kriesche , Maurice Koch
摘要： The present invention relates to a method for the production of polyamide 6 with low extract content and a device for it. Here, a melt of non-extracted polyamide 6 is cleaned from monomer and oligomers in a degasification device in vacuum, wherein the vapor being withdrawn from the degasification device by the vacuum generation device is cleaned from monomer, oligomers and optionally water at first in a direct condenser which is operated with liquid ε-caprolactam and subsequently in a pre-separator which is cooled with a coolant, before it reaches the vacuum generation device. A particularly preferable variant of the method envisages the usage of the melt of polyamide 6 with low extract content so prepared in a direct process of spinning into textile fibers and/or filaments.
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公开(公告)号：US20200071463A1
公开(公告)日：2020-03-05
申请号：US16140667
申请日：2018-09-25
申请人： Technip Zimmer GmbH
发明人： Stefan Deiss , Raimund Schwarz , Martin Baumert , Gerald Kriesche , Maurice Koch
摘要： The present invention relates to a method for the production of polyamide 6 with low extract content and a device for it. Here, a melt of non-extracted polyamide 6 is cleaned from monomer and oligomers in a degasification device in vacuum, wherein the vapor being withdrawn from the degasification device by the vacuum generation device is cleaned from monomer, oligomers and optionally water at first in a direct condenser which is operated with liquid ε-caprolactam and subsequently in a pre-separator which is cooled with a coolant, before it reaches the vacuum generation device. A particularly preferable variant of the method envisages the usage of the melt of polyamide 6 with low extract content so prepared in a direct process of spinning into textile fibers and/or filaments.
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