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公开(公告)号：US20190388882A1
公开(公告)日：2019-12-26
申请号：US16446454
申请日：2019-06-19
发明人： Buwei YU , Tao JIANG , Sihan WANG , Hongling CHU , Yan JIANG , Hongliang HUO , Xianming XU , Libo WANG , Huaiqi SHAO , Yali WANG , Yuanyuan CAO , Tong LIU , Kecun MA , Fuling HUANG , Xiuhui WANG , Enhao SUN , Yulong WANG
摘要： The present disclosure provides a method and a catalyst for selective oligomerization of ethylene. The raw material for the catalyst consists of a dehydropyridine annulene-type ligand, a transition metal compound, and an organometallic compound in a molar ratio of 1:0.5-100:0.1-5000. The present disclosure also provides a method for selective oligomerization of ethylene accomplished by using the above-mentioned catalyst. The catalyst for selective oligomerization of ethylene has high catalytic activity, high selectivity for the target products 1-hexene and 1-octene, and low selectivity for 1-butene and 1-C10+.
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2.发明公开公开(公告)号：US20240270879A1
公开(公告)日：2024-08-15
申请号：US18617270
申请日：2024-03-26
发明人： Qian CHEN , Danfeng ZHANG , Jincheng LIU , Maoyu ZHAO , Meng GAO , Jian CUI , Xianming XU , Ben NIU , Wenpeng LI , Yonggang JI
IPC分类号： C08F4/70 , C08F2/06 , C08F4/602 , C08F210/02 , C08F220/14
CPC分类号： C08F4/7098 , C08F2/06 , C08F4/6028 , C08F4/7083 , C08F210/02 , C08F220/14 , C08F2400/04 , C08F2410/04
摘要： The present application provides a catalyst for copolymerization of ethylene and methyl methacrylate and an application thereof. The catalyst includes a main catalyst, and the main catalyst is obtained by compounding a compound of formula (I) and a compound of formula (II); a mole ratio of the compound of formula (I) to the compound of formula (II) is (1:49) to (49:1). The catalyst has an excellent catalytic activity, and a copolymer of ethylene and methyl methacrylate with a high molecular weight can be obtained, with a weight average molecular weight of not less than 1×105 g/mol.
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公开(公告)号：US20240336645A1
公开(公告)日：2024-10-10
申请号：US18646396
申请日：2024-04-25
发明人： Yulong WANG , Hongpeng LI , Simeng ZHAO , Tong LIU , Xiuhui WANG , Tiekai ZHAO , Xianming XU , Yongjun ZHANG , Yonggang JI , Kecun MA
IPC分类号： C07F17/00 , C08F4/6592
CPC分类号： C07F17/00 , C08F4/6592
摘要： The present application provides a metallocene compound, and a preparation method and application thereof. The metallocene compound of the present application includes a structure as shown in Formula a, where Ar is selected from a substituted or unsubstituted C6-C30 aryl; Cp′ is selected from a substituted or unsubstituted cyclopentadienyl, indenyl, or fluorenyl; X is at least one of halogen, substituted or unsubstituted C1-C30 alkyl, alkoxy, substituted or unsubstituted C2-C30 dialkylamino, alkenyl, and substituted or unsubstituted C6-C30 aryl; and M is a transition metal element. The metallocene compound is suitable for catalyzing a C6-C30 long straight chain α-olefin raw material and also a mixed long branched chain non-terminal olefin raw material, and may obtain a polymerization product with a target molecular weight according to demand.
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4.发明公开公开(公告)号：US20240002243A1
公开(公告)日：2024-01-04
申请号：US18039469
申请日：2021-10-27
发明人： Tong LIU , Yuanyuan CAO , Yulong WANG , Libo WANG , Xianming XU , Hongping LI , Enhao SUN , Xiuhui WANG , Wei SUN , Han GAO , Hongling CHU , Yongjun ZHANG , Yonggang JI , Kecun MA , Yan JIANG , Qian CHEN , Hongliang HUO , Qi YU
CPC分类号： C01B35/061 , B01D3/06 , B01D53/228 , B01D71/34 , B01D71/36 , C01B2210/0012 , B01D2311/10 , B01D2311/14
摘要： The present invention provides a method for separation and recovery of boron trifluoride and complexes thereof in an olefin polymerization reaction. The method for separation and recovery of boron trifluoride and complexes thereof in an olefin polymerization reaction, comprising: 1) subjecting a mixture obtained after an olefin polymerization reaction to flash distillation separation to separate part of gaseous boron trifluoride; 2) subjecting the liquid phase obtained from the flash distillation separation to membrane separation to obtain complexes of boron trifluoride and a crude product of the olefin polymerization reaction; and 3) subjecting the crude product of the olefin polymerization reaction obtained in step 2) to gas stripping separation to separate the remaining gaseous boron trifluoride, so as to obtain a pure product of the olefin polymerization reaction The present invention designs a matching process based on the polymorphic characteristics of boron trifluoride and complexes thereof to achieve efficient separation of boron trifluoride and complexes thereof from polymerization intermediates.
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