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1. 发明授权

US4187370A Polymerization and recovery of 2-pyrrolidone with acid treatment 失效
标题翻译：用酸处理聚合和回收2-吡咯烷酮
公开(公告)号：US4187370A
公开(公告)日：1980-02-05
申请号：US842758
申请日：1977-10-17
申请人： Byron E. Anshus , Kiyoshi Katsumoto , Ira M. Serkes
发明人： Byron E. Anshus , Kiyoshi Katsumoto , Ira M. Serkes
IPC分类号： B01D3/34 , C07D201/16 , C07D207/26 , C07D207/267 , C08G69/24
CPC分类号： C07D207/267 , B01D3/34 , C07D201/16 , C08G69/24
摘要： An alkaline-catalyzed process for preparing poly-2-pyrrolidone characterized by the step of treating the polypyrrolidone reaction product mixture with an acid to prevent polymer agglomeration and prevent base-catalyzed polymer degradation. In another embodiment, unreacted poly-2-pyrrolidone is recovered by washing the acid-treated polymer reaction product mixture with water and the resulting wash water recovered, treated with further acid, and then subjected to a two-stage evaporation process. Poly-2-pyrrolidone is known as nylon 4, and can be shaped into filaments and various molded articles.
摘要翻译：一种碱催化的制备聚-2-吡咯烷酮的方法，其特征在于用酸处理聚吡咯烷酮反应产物混合物以防止聚合物凝聚并防止碱催化聚合物降解的步骤。在另一个实施方案中，通过用水洗涤酸处理的聚合物反应产物混合物来回收未反应的聚-2-吡咯烷酮，并将所得洗涤水回收，再用酸处理，然后进行两阶段蒸发处理。聚-2-吡咯烷酮被称为尼龙4，并且可以成形为长丝和各种模制品。

2. 发明授权

US4115399A Preparation of catalyst for the polymerization of 2-pyrrolidone 失效
标题翻译： 2-吡咯烷酮聚合催化剂的制备
公开(公告)号：US4115399A
公开(公告)日：1978-09-19
申请号：US668888
申请日：1976-03-22
申请人： Byron E. Anshus
发明人： Byron E. Anshus
IPC分类号： B01J31/02 , C07D207/26 , C08G69/24
CPC分类号： B01J31/0252 , B01J31/0239 , B01J31/0247 , B01J31/4092 , C07D207/26 , C08G69/24 , Y02P20/584
摘要： A catalyst solution for the anionic polymerization of 2-pyrrolidone is produced by contacting an alkali metal hydroxide and excess 2-pyrrolidone. The catalyst solution is dehydrated under stripping conditions.
摘要翻译：通过使碱金属氢氧化物和过量的2-吡咯烷酮接触来制备2-吡咯烷酮的阴离子聚合催化剂溶液。催化剂溶液在汽提条件下脱水。

3. 发明授权

US4139696A Continuous polymerization of 2-pyrrolidone 失效
标题翻译： 2-吡咯烷酮的连续聚合
公开(公告)号：US4139696A
公开(公告)日：1979-02-13
申请号：US792421
申请日：1977-04-29
申请人： Byron E. Anshus , Kiyoshi Katsumoto , Ira M. Serkes
发明人： Byron E. Anshus , Kiyoshi Katsumoto , Ira M. Serkes
IPC分类号： B01D3/34 , C07D201/16 , C07D207/26 , C07D207/267 , C08G69/24
CPC分类号： C07D207/267 , B01D3/34 , C07D201/16 , C08G69/24
摘要： 2-Pyrrolidone is continuously polymerized to a high-molecular-weight particulate product by the stirred polymerization of the carbonated alkaline polymerizate. The polymerizate is prepared by contacting an aqueous hydroxide with excess 2-pyrrolidone, maintaining the resultant alkaline mixture at an elevated temperature for sufficient time to reduce the 2-pyrrolidone dimer content of the mixture to within the desired limits, dehydrating the alkaline mixture to reduce the water content to within the desired limits, and contacting the alkaline mixture with carbon dioxide to form the carbonated alkaline polymerizate. The paste of particular polypyrrolidone and liquid polymerizate is continuously withdrawn from the reactor, neutralized with aqueous acid and washed with warm water.
摘要翻译：通过碳酸化碱性聚合物的搅拌聚合将2-吡咯烷酮连续聚合成高分子量颗粒产物。通过使氢氧化钠与过量的2-吡咯烷酮接触来制备聚合物，将得到的碱性混合物保持在升高的温度下足够的时间以将混合物的2-吡咯烷酮二聚体含量降低至所需限度内，使碱性混合物脱水以减少水含量达到所需限度内，并使碱性混合物与二氧化碳接触以形成碳酸化的碱性聚合物。将特定聚吡咯烷酮和液体聚合物的糊料从反应器中连续取出，用酸水溶液中和，并用温水洗涤。

4. 发明授权

US4050994A Recovery of 2-pyrrolidone from dilute alkaline solutions 失效
标题翻译：从稀碱溶液中回收2-吡咯烷酮
公开(公告)号：US4050994A
公开(公告)日：1977-09-27
申请号：US745501
申请日：1976-11-26
申请人： Byron E. Anshus
发明人： Byron E. Anshus
IPC分类号： C08G69/00 , B01D3/34 , C07D201/16 , C07D207/26 , C07D207/267 , C08G69/24 , C07D207/12
CPC分类号： C07D207/267 , B01D3/34 , C07D201/16
摘要： A two-stage evaporative method for recovering polymerizable 2-pyrrolidone from alkaline aqueous solutions such as those obtained by washing the catalyst from an incompletely reacted polypyrrolidone polymerizate, includes the steps of neutralizing the base with mineral acid, removing most of the water in an initial reduced pressure evaporation and recovering the pyrrolidone from a salt/pyrrolidone slurry by vaporization under reduced pressure.
摘要翻译：从由不完全反应的聚吡咯烷酮聚合物洗涤催化剂得到的碱性水溶液中回收可聚合的2-吡咯烷酮的两阶段蒸发方法包括以无机酸中和碱的步骤，初始地除去大部分水减压蒸发并通过在减压下汽化从盐/吡咯烷酮浆液中回收吡咯烷酮。

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