利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

531 条记录 (耗时 0.036 秒)

    PROCESS FOR THE PRODUCTION OF COPOLYMERS
    4.
    发明申请
    PROCESS FOR THE PRODUCTION OF COPOLYMERS 审中-公开

    公开(公告)号：US20190135966A1

    公开(公告)日：2019-05-09

    申请号：US16096879

    申请日：2017-04-13

    申请人： SABIC Global Technologies B.V.

    发明人： Stephan Moyses ,  Chester Hassman ,  Dejin Li ,  Jianhua Xu

    IPC分类号： C08F279/04 ,  C08F2/02 ,  C08F2/06 ,  C08F6/06

    摘要： The present invention relates to a process for the production of copolymers comprising: (i) forming a reaction mixture comprising an elastomer and a vinyl aromatic compound; (ii) introducing the reaction mixture to a reaction vessel; and (iii) performing a polymerisation reaction wherein steps (i)-(iii) are performed in that order to obtain a copolymer comprising: (a) a phase comprising a reaction product of the elastomer with the vinyl aromatic compound; and (b) a phase comprising a reaction product of the vinyl aromatic compound wherein a sample of the reactor contents is obtained during step (iii) to determine of the formed copolymer: the content of phase (b); and/or●the molecular weight of phase (b) wherein the determination of the content of phase (b) in the formed copolymer and the molecular weight of phase (b) is performed by a method comprising isolation of phase (b) from the sample of the formed copolymer and subjecting the obtained phase (b) to molecular analysis. Such process allows for the determination of the content N of the phase (b) and of the molecular weight thereof in a quick and efficient manner, allowing for adjustment of process parameters such that the production of products that not correspond to the desired product quality is minimised.

    Solution polymerization processes with reduced energy usage
    7.
    发明授权
    Solution polymerization processes with reduced energy usage 有权
    溶液聚合过程减少能源消耗

    公开(公告)号：US09428597B2

    公开(公告)日：2016-08-30

    申请号：US14771355

    申请日：2014-03-04

    申请人： NOVA Chemicals (International) S.A.

    发明人： Terri A Price ,  Fazle Sibtain ,  Eric Cheluget

    IPC分类号： C08F10/02 ,  C08F2/06 ,  C08F6/02 ,  C08F6/06 ,  C08F6/10 ,  C08J11/02 ,  C08F6/00

    CPC分类号： C08F10/02 ,  C08F6/003 ,  C08F6/02 ,  C08J11/02 ,  C08L23/04 ,  C08F2/01 ,  C08F2/06 ,  C08F210/16 ,  C08F210/14

    摘要： An improved solution polymerization process wherein energy consumption is reduced comprising: i) injecting ethylene, solvent, catalyst, α-olefins and hydrogen into at least one reactor to produce a polyethylene in a single liquid phase solution; ii) deactivating the single liquid phase solution; iii) passing the deactivated solution into a vapor/liquid separator forming a bottom stream of polyethylene rich solvent and a gaseous overhead stream; iv) passing not more than 40% of the gaseous overhead stream to distillation; v) condensing the remainder of the gaseous overhead stream to form a recycle stream, while generating low pressure steam; vi) passing the recycle stream through a means for oligomer removal; vii) passing the recycle stream through a lights separator; viii) passing the recycle stream through a purification step; ix) collecting the recycle stream in a recycle drum, passing the recycle stream through a pump and injecting a high pressure recycle stream into said reactors.

    摘要翻译： 改进的溶液聚合方法，其中能量消耗降低，包括：i）将乙烯，溶剂，催化剂，α-烯烃和氢气注入至少一个反应器中以在单一液相溶液中制备聚乙烯; ii）使单一液相溶液失活; iii）将失活的溶液通入形成富含聚乙烯的溶剂和气态塔顶液流的底部流的气/液分离器; iv）将不超过40％的塔顶气流送入蒸馏; v）冷凝剩余的气态塔顶物流以形成循环流，同时产生低压蒸汽; vi）使再循环流通过用于低聚物去除的装置; vii）使循环流通过灯分离器; viii）使循环流通过净化步骤; ix）在再循环鼓中收集循环物流，使循环流通过泵并将高压循环物流注入所述反应器。

    Method for producing polyvinyl alcohol resin
    9.
    发明授权
    Method for producing polyvinyl alcohol resin 有权
    聚乙烯醇树脂的制造方法

    公开(公告)号：US09074031B2

    公开(公告)日：2015-07-07

    申请号：US13581560

    申请日：2010-11-12

    申请人： Satoshi Watanabe ,  Takahiro Kozuka

    发明人： Satoshi Watanabe ,  Takahiro Kozuka

    IPC分类号： C08F8/00 ,  C08F16/06 ,  C08F216/06 ,  C08F6/00 ,  C08F6/06 ,  C08F6/16 ,  C08F6/28 ,  C08J11/02

    CPC分类号： C08F216/06 ,  C08F6/003 ,  C08F6/008 ,  C08F6/06 ,  C08F6/16 ,  C08F6/28 ,  C08F8/12 ,  C08J11/02 ,  C08L29/04 ,  C08F118/08

    摘要： Provided is a method of producing a polyvinyl alcohol resin, wherein the impurities in the resin are removed efficiently with a small amount of a washing liquid. A polyvinyl alcohol obtained after a polymerization step (step S1) and a saponification step (step S2) is washed with a washing liquid consisting of methyl acetate: 1 to 40 parts by mass, methanol: 50 to 98.9 parts by mass and water: 0.1 to 10 parts by mass in a washing step (step S3). The solid matter concentration of the slurry containing the washing liquid then is 1 to 30 mass %.

    摘要翻译： 提供一种生产聚乙烯醇树脂的方法，其中用少量洗涤液有效地除去树脂中的杂质。 在聚合步骤（步骤S1）和皂化步骤（步骤S2）后获得的聚乙烯醇用乙酸甲酯洗涤液洗涤1至40质量份，甲醇：50至98.9质量份，水：0.1 在洗涤步骤中为10质量份（步骤S3）。 含有洗涤液的浆料的固体成分浓度为1〜30质量％。