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公开(公告)号:US5049682A
公开(公告)日:1991-09-17
申请号:US405606
申请日:1989-09-11
IPC分类号: C07D307/89 , C07C51/377 , C07C51/567 , C07C253/30
CPC分类号: C07C253/30 , C07C51/377 , C07C51/567
摘要: Halophthalic anhydrides are prepared by the liquid phase reaction of a brominating agent with halogen substituted hexa- or tetra-hydrophthalic anhydrides.
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公开(公告)号:US6025407A
公开(公告)日:2000-02-15
申请号:US961516
申请日:1997-10-30
申请人: Sandor M. Nagy , Ramesh Krishnamurti , Mary K. Cocoman , Walter M. Opalinski , Thomas F. Smolka
发明人: Sandor M. Nagy , Ramesh Krishnamurti , Mary K. Cocoman , Walter M. Opalinski , Thomas F. Smolka
IPC分类号: C08F2/46 , C08F2/48 , C08F4/642 , C08F4/659 , C08F4/6592 , C08F114/06 , C08F4/06
CPC分类号: C08F114/06
摘要: Disclosed is a process for polymerizing vinyl chloride monomer in the presence of light. A mixture is formed of liquid vinyl chloride monomer, preferably about 10 to about 250 ppm of a metallocene catalyst, about 1 to about 2000 moles of an aluminum-containing cocatalyst per mole of catalyst, and up to about 500 moles of a Lewis base per mole of aluminum in the cocatalyst. Selected alkyl groups from the aluminum-containing cocatalyst can be placed on the ends of the poly (vinyl chloride) chains.
摘要翻译: 公开了一种在光存在下聚合氯乙烯单体的方法。 混合物由液体氯乙烯单体形成,优选约10至约250ppm的茂金属催化剂,约1至约2000摩尔每摩尔催化剂的含铝助催化剂,以及至多约500摩尔的路易斯碱 助催化剂中的铝摩尔数。 来自含铝助催化剂的选择的烷基可以放在聚(氯乙烯)链的端部上。
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公开(公告)号:US5206391A
公开(公告)日:1993-04-27
申请号:US751841
申请日:1991-08-29
IPC分类号: C07C51/377 , C07C51/567 , C07C253/30
CPC分类号: C07C253/30 , C07C51/377 , C07C51/567
摘要: A process for the preparation of a halophthalic anhydride, such as chlorophthalic anhydride, comprising the liquid phase reaction of bromine with a halogen substituted hexa- or tetra-hydrophthalic anhydride to produce halophthalic anhydride and gaseous HBr, and reacting the gaseous HBr with chlorine to regenerate bromine.
摘要翻译: 制备卤代邻苯二甲酸酐如氯邻苯二甲酸酐的方法,包括溴与卤素取代的六 - 或四邻苯二甲酸酐的液相反应产生卤代邻苯二甲酸酐和气态HBr,并使气态HBr与氯反应再生 溴。
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公开(公告)号:US5233054A
公开(公告)日:1993-08-03
申请号:US721004
申请日:1991-06-26
IPC分类号: C07C51/377 , C07C51/567 , C07C253/30
CPC分类号: C07C253/30 , C07C51/377 , C07C51/567
摘要: Halophthalic anhydrides are prepared by the liquid phase reaction of a brominating agent with halogen substituted hexa- or tetra-hydrophthalic anhydrides.
摘要翻译: 卤代邻苯二甲酸酐通过溴化剂与卤素取代的六 - 或四 - 邻苯二甲酸酐的液相反应来制备。
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公开(公告)号:US4962206A
公开(公告)日:1990-10-09
申请号:US439299
申请日:1989-11-20
IPC分类号: C07D307/89 , B01J23/745 , B01J27/128 , C07B61/00 , C07C51/567
CPC分类号: C07C51/567
摘要: A process for the production of 4-bromophthalic anhydride which comprises the reaction of 4-chlorotetrahydrophthalic anhydride with elemental bromine, in the presence of a catalytically effective amount of iron or an iron salt is disclosed.
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