-
1.发明授权Method for controlling the formation of polymer accumulations during distillation of a vinylaromatic monomer 失效控制在乙烯基芳族单体蒸馏期间聚合物聚集形成的方法
公开(公告)号：US4374000A
公开(公告)日：1983-02-15
申请号：US230617
申请日：1981-02-02
IPC分类号： C07C7/04 , B01D3/20 , C07C1/00 , C07C7/05 , C07C7/20 , C07C15/40 , C07C15/46 , C07C67/00 , B01D3/34
摘要： A method for controlling the formation of polymer accumulations in a distillation column comprising accumulating liquid phase material containing a polymerization inhibitor in a seal pan; providing the seal pan with liquid-pervious weep hole means through the bottom of the pan and allowing a controlled quantity of polymerization inhibitor-containing liquid phase material to seep through the weep hole means to the underside of the seal pan; and apparatus useful for practicing the disclosed method.
摘要翻译： 一种用于控制蒸馏塔中聚合物聚集形成的方法，包括在密封盘中积聚含有聚合抑制剂的液相材料; 为密封盘提供透液性的防漏孔装置，通过锅底，并允许含有阻聚剂的液相物质通过排气孔装置渗入密封盘的下侧; 以及用于实施所公开的方法的装置。
-
公开(公告)号：US4306105A
公开(公告)日：1981-12-15
申请号：US189429
申请日：1980-09-22
IPC分类号： C08F4/00 , B01J21/04 , B01J27/08 , B01J35/10 , C07B61/00 , C07C1/00 , C07C2/10 , C07C2/22 , C07C11/02 , C07C67/00 , C08F4/06 , C08F4/12 , C08F4/14 , C08F10/00 , C08F10/10 , C08F110/10 , C07C2/02
CPC分类号： C07C2/10 , B01J21/04 , C08F110/10 , C07C2521/04
摘要： A process for selectively producing liquid polyisobutene contacting a feed stream containing mixed butenes with a dry chlorinated alumina catalyst at a temperature of from about -15.degree. to about 50.degree. C. wherein the chlorinated alumina contains from about 2 to 20% by weight of chlorine and the alumina has a purity of at least 99% and a surface area greater than 150 m.sup.2 /g with at least 10% of the pores having a mean diameter larger than 200A and recovering polyisobutenes having a molecular weight between about 280 and 4000.
摘要翻译： 在约-15℃至约50℃的温度下，选择性地生产含有混合丁烯的进料流与干氯化氧化铝催化剂接触的液体聚异丁烯的方法，其中氯化氧化铝含有约2至20重量％的氯 并且所述氧化铝具有至少99％的纯度和大于150m 2 / g的表面积，并且至少10％的孔的平均直径大于200A并回收分子量在约280和4000之间的聚异丁烯。
-
搜索结果
2 条记录 (耗时 0.013 秒)
