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    PROCESS TO PRODUCE TETRABROMOBISPHENOL WITH THE REDUCED FORMATION OF ALKYL BROMIDE BY-PRODUCTS
    3.
    发明公开
    PROCESS TO PRODUCE TETRABROMOBISPHENOL WITH THE REDUCED FORMATION OF ALKYL BROMIDE BY-PRODUCTS 失效
    用于生产溴化物形成减少的四溴双酚作为副产品

    公开(公告)号：EP0801638A4

    公开(公告)日：1998-05-06

    申请号：EP95935142

    申请日：1995-09-26

    申请人： GREAT LAKES CHEMICAL CORP

    发明人： ARMSTRONG STUART E

    IPC分类号： C07C37/62 ,  C07C39/367

    CPC分类号： C07C37/62 ,  C07C39/367

    摘要： A process for the preparation of 4,4'-isopropylidene bis(2,6-dibromophenol), also known as tetrabrombisphenol A, that dramatically reduces the formation of alkyl bromide by-products. Bisphenol A is brominated with a C3 to C5 n-alcohol in a water mixture to suppress the formation of alkyl bromides. The bisphenol A is brominated between 15 DEG C and 25 DEG C and then heated at 55 DEG C to 70 DEG C to insure bromination is complete. The tetrabrombisphenol A is then filtered from the reaction mixture and dried. Tetrabromobisphenol A produced from this process typically has a melting point of 180 DEG C or higher, and is typically greater than 98 % pure. Hydrogen peroxide is optionally combined with the reactants to reduce the amount of added bromine necessary for the bromination of the tetrabromobisphenol A.

    HYDROFLUOROCARBON COMPOSITIONS AS BLOWING AGENTS FOR CELLULAR PLASTICS
    5.
    发明公开
    HYDROFLUOROCARBON COMPOSITIONS AS BLOWING AGENTS FOR CELLULAR PLASTICS 失效
    氢氟烃组成泡沫细胞PLASTICS

    公开(公告)号：EP0690887A4

    公开(公告)日：1996-03-13

    申请号：EP94913933

    申请日：1994-03-22

    申请人： GREAT LAKES CHEMICAL CORP

    发明人： ROBIN MARK L ,  IIKUBO YUICHI ,  REGISTER W DOUGLAS ,  ROSE RICHARD S

    IPC分类号： C08J9/14

    CPC分类号： C08J9/144 ,  C08J9/149 ,  Y10S264/05 ,  Y10S521/91

    摘要： Blowing agents for use in foamable plastics such as polystyrene, polyvinyl chloride, polyethylene and other non-polyisocyanate-based foams, comprising a mixture of 1,1,1,2,3,3,3-heptafluoropropane in combination with one or more hydrocarbons or partially halogenated alkanes. In one aspect of the invention the hydrocarbon adjuvant is selected from the group consisting of propane, butane, isobutane, n-pentane, i-pentane, neopentane, n-hexane, 2-methylpentane, 3-methylpentane and 2,2-dimethylbutane. In another aspect of the invention the halogenated alkane is selected from the group consisting of ethyl chloride, 2,2-dichloro-1,1,1-trifluoroethane (HCFC-123), 1,1-dichloro-1-fluoroethane (HCFC-141b), 1-chloro-1,1-difluoroethane (HCFC-142b), 2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124), 3,3-dichloro-1,1,1,2,2-pentafluoropropane (HCFC-225ca), 1,3-dichloro-1,1,2,2,3-pentafluoropropane (HCFC-225cb), 1,1-difluoroethane (HFC-125a), 1,1,1-trifluoroethane (HFC-143a), 1,1,1,2-tetrafluoroethane (HFC-134a), 1,1,2,2-tetrafluoroethane (HFC-134), 1,1,2,2,3-pentafluoropropane (HFC-245ca), 1,1,1,2,3,3-hexafluoropropane (HFC-236ea), and 1,1,2,3,3-pentafluoropropane (HFC-245ea).

    CHEMICAL PRODUCTION PROCESSES AND SYSTEMS
    9.
    发明公开
    CHEMICAL PRODUCTION PROCESSES AND SYSTEMS 审中-公开
    CHEMISCHE HERSTELLUNGSVERFAHREN UND-SYSTEME

    公开(公告)号：EP1789373A4

    公开(公告)日：2009-01-21

    申请号：EP05791273

    申请日：2005-08-26

    申请人： GREAT LAKES CHEMICAL CORP

    发明人： HEDRICK VICKI

    IPC分类号： C07C17/00 ,  B01J8/18 ,  B32B5/02 ,  C07C17/10 ,  C07C17/42

    CPC分类号： C07C17/25 ,  B01J2219/00006 ,  C07C17/04 ,  C07C17/21 ,  C07C17/23 ,  C07C17/263 ,  C07C21/20 ,  C07C19/14 ,  C07C19/12 ,  C07C21/18

    摘要： Chemical Production Processes and Systems. Chemical production processes are provided that include replacing a halogen of an unsaturated halocarbon to produce an unsaturated hydrohalocarbon. Chemical production systems are provided that include a reaction zone coupled to first and second reservoirs, the first reservoir containing an unsaturated halocarbon and the second reservoir containing a hydrogenating reagent with the system being configured to expose the unsaturated halocarbon of the first reservoir to the hydrogenating agent of the second reservoir within the reaction zone.

    摘要翻译： 化学生产过程和系统。 提供的化学生产方法包括替代不饱和卤化碳的卤素以产生不饱和氢卤碳化合物。 提供了化学生产系统，其包括连接至第一和第二储器的反应区，第一储器含有不饱和卤化碳，第二储器含有氢化剂，系统配置成将第一储器的不饱和卤化碳暴露于氢化剂 在反应区内的第二储器。