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1. 发明授权

US4429107A Continuous preparation of polycaprolactam wherein constant composition is maintained 失效
标题翻译：连续制备保持恒定组成的聚己内酰胺
公开(公告)号：US4429107A
公开(公告)日：1984-01-31
申请号：US410880
申请日：1982-08-24
申请人： Hugo Strehler , Werner Hoerauf , Guenter Valentin , Friedrich Urbanek
发明人： Hugo Strehler , Werner Hoerauf , Guenter Valentin , Friedrich Urbanek
IPC分类号： C08G69/16 , C08G69/46
CPC分类号： C08G69/46 , C08G69/16
摘要： An improved process for the continuous preparation of polycaprolactam, in which .epsilon.-caprolactam is partially polymerized, with the addition of a water-containing agent and acetic acid or propionic acid as a chain regulator, at a nylon-forming temperature, in a mechanically mixed zone in a vertical tubular reactor through which the reaction mixture flows downwards, and is then polymerized further, in additional heat exchange zones, until the desired degree of polymerization is reached, and polycaprolactam is then discharged as a melt, wherein a gaseous mixture of caprolactam, water and acetic acid or propionic acid is removed at the top of the tubular reactor and is fed to the middle of a column, water is removed at the top of the column, the bottom of the column is maintained at from 125.degree. to 145.degree. C., and the mixture obtained at the bottom of the column, and comprising caprolactam, acetic acid or propionic acid and a small amount of water, is recycled to the top of the tubular reactor.
摘要翻译：在尼龙形成温度下以机械混合的方式连续制备聚己内酰胺的改进方法，其中ε-己内酰胺部分聚合，加入含水试剂和乙酸或丙酸作为链调节剂反应混合物向下流动，然后在另外的热交换区中进一步聚合，直到达到所需的聚合度，然后将聚己内酰胺作为熔体排出，其中己内酰胺的气体混合物，在管式反应器的顶部除去水和乙酸或丙酸，并将其加入柱的中间，在塔的顶部除去水，塔的底部保持在125°至145° 并将在柱底部获得的包含己内酰胺，乙酸或丙酸和少量水的混合物再循环到小管的顶部 r反应堆。

2. 发明授权

US4436897A Preparation of polycaprolactam with aqueous extract containing caprolactam and caprolactam oligomers 失效
标题翻译：用含己内酰胺和己内酰胺低聚物的含水提取物制备聚己内酰胺
公开(公告)号：US4436897A
公开(公告)日：1984-03-13
申请号：US410881
申请日：1982-08-24
申请人： Hugo Strehler , Werner Hoerauf , Friedrich Urbanek
发明人： Hugo Strehler , Werner Hoerauf , Friedrich Urbanek
IPC分类号： C08G69/16 , C08G69/46
CPC分类号： C08G69/16 , C08G69/46
摘要： An improved process for the preparation of fiber-forming polycaprolactam by polymerizing .epsilon.-caprolactam, and an aqueous extract containing .epsilon.-caprolactam and caprolactam oligomers, which extract has been obtained by extracting polycaprolactam with water, wherein the aqueous extract contains from 0.1 to 5.0% by weight of oligomers of caprolactam, based on the monomeric caprolactam in the aqueous extract.
摘要翻译：通过聚合ε-己内酰胺制备纤维形成聚己内酰胺的改进方法和含有ε-己内酰胺和己内酰胺低聚物的水提取物已经通过用水萃取聚己内酰胺获得，其中含水提取物含有0.1-5.0％的基于在水提取物中的单体己内酰胺的己内酰胺低聚物。

3. 发明授权

US4056514A Continuous manufacture of polybutylene terephthalates 失效
标题翻译：聚苯乙烯邻苯二甲酸酯的连续制造
公开(公告)号：US4056514A
公开(公告)日：1977-11-01
申请号：US668284
申请日：1976-03-18
申请人： Hugo Strehler , Ludwig Beer , Eduard Heil , Friedrich Urbanek , Hermann Fischer
发明人： Hugo Strehler , Ludwig Beer , Eduard Heil , Friedrich Urbanek , Hermann Fischer
IPC分类号： C08G63/00 , C08G63/78 , C08G63/85 , C08G63/16
CPC分类号： C08G63/78 , C08G63/85
摘要： A process for the continuous manufacture of linear, high molecular weight, polybutylene terephthalates, in which dimethyl terephthalate is trans-esterified with 1,4-butanediol, if desired in the presence of up to 40 mole% of other starting materials which form linear polyesters, in the molar ratio of from 1:1.2 to 1:1.5, in a plurality of successive stages at temperatures rising from 160.degree. to 230.degree. C, the mixture thus obtained is passed, at from 230.degree. to 270.degree. C and from 2 mm Hg to 20 mm Hg, upward through a bundle of stationary heated tubes, and immediately thereafter through a hold tank, with the proviso that the volume of the hold tank is at least 1/4 and at most 2.5 times the volume of the tube bundle and the mean residence time in the tube bundle and hold tank together is from 10 to 60 minutes, and the precondensate thus obtained is polycondensed at from 240.degree. to 260.degree. C and from 0.1 to 2 mm Hg. with continuous formation of thin films.The polybutylene terephthalates manufactured by the above process may be used for the manufacture of products such as fibers, films, sheeting and injection moldings.

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