Nickel electroplating baths
    1.
    发明授权
    Nickel electroplating baths 失效
    镍电镀BATHS

    公开(公告)号:US3779874A

    公开(公告)日:1973-12-18

    申请号:US3779874D

    申请日:1972-10-13

    Applicant: BASF AG BASF AG

    Inventor: SCHENK W HOVEMANN F

    CPC classification number: C25D3/12

    Abstract: Stablized aqueous solutions of aliphatic unsaturated sulfonic acids which contain aliphatic chlorine compounds, and nickelplating baths containing said stabilized aqueous solutions as brighteners.

    Abstract translation: 包含脂族氯化合物的脂肪族不饱和磺酸稳定水溶液和含有所述稳定化水溶液作为增白剂的镀镍浴。

    Active small diameter polystyrene seed latex for continuous emulsion polymerization
    2.
    发明申请
    Active small diameter polystyrene seed latex for continuous emulsion polymerization 审中-公开
    用于连续乳液聚合的活性小直径聚苯乙烯种子胶乳

    公开(公告)号:US20040106725A1

    公开(公告)日:2004-06-03

    申请号:US09850754

    申请日:2001-05-08

    Applicant: BASF AG

    CPC classification number: C08F257/02 C08F12/04 C08F2/24

    Abstract: A polystyrene seed latex composition is provided having a total emulsion polymer content of from 0.2 to 2.0 weight percent and a particle diameter less than 150 null. The seed latex is produced on a continuous basis by feeding to a continuous stirred reactor an emulsion stream and initiator stream. The feed streams are mixed in the stirred reactor at room temperature to produce the seed latex. Preferably, the initiator stream comprises a sodium formaldehyde sulfoxylate reducing agent. The amount of initiator charged into the continuous seed reactor is sufficient to complete both the seed and a subsequent continuous latex polymerization reaction.

    Abstract translation: 提供聚乳酸聚合物含量为0.2-2.0重量%且粒径小于150的聚苯乙烯种子胶乳组合物。 通过向连续搅拌的反应器中加入乳液流和引发剂流,连续地生产种子胶乳。 将进料流在搅拌的反应器中在室温下混合以产生种子胶乳。 优选地,引发剂流包含甲醛次硫酸氢钠还原剂。 装入连续种子反应器中的引发剂的量足以完成种子和随后的连续胶乳聚合反应。

    Preparation of propene
    5.
    发明授权
    Preparation of propene 失效
    丙烯的制备

    公开(公告)号:US6271430B2

    公开(公告)日:2001-08-07

    申请号:US28320199

    申请日:1999-04-01

    Applicant: BASF AG

    Abstract: The present invention relates to a process for preparing propene by metathesis of olefins. The process comprises preparing propene bya) in a first reactor (R1), reacting 1-butene and 2-butene to give propene and 2-pentene in the presence of a metathesis catalyst comprising at least one compound of a metal of transition group VIb, VIIb, or VIII of the Periodic Table of elements,b) subsequently separating the propene, unreacted raffinate II, and 2-pentene formed in a) in a distillation column (D1),c) subsequently reacting the 2-pentene of b) with ethene to give propene and 1-butene in a reactor (R2) in the presence of a metathesis catalyst comprising at least one compound of a metal of transition group VIb, VIIb, or VIII of the Periodic Table of Elements,d) subsequently separating the propene and 1-butene formed in c),e) subsequently returning the 1-butene formed in d) to step a) andf) wherein unreacted raffinate II is taken off at the middle off take of column D1 in b) and partly returned to step a).

    Abstract translation: 本发明涉及通过烯烃复分解制备丙烯的方法。 该方法包括通过在第一反应器(R1)中制备丙烯,使1-丁烯和2-丁烯反应得到丙烯和2-戊烯,在复分解催化剂存在下,该复分解催化剂包含至少一种转移基团VIb的金属化合物, Ⅶb或Ⅷ元素,b)随后将a)中形成的丙烯,未反应的残液II和2-戊烯分离在蒸馏塔(D1)中,c)随后使b)的2-戊烯与 乙烯在反应器(R2)中在复分解催化剂存在下给出丙烯和1-丁烯,所述复分解催化剂包含至少一种元素周期表的VIb,VIIb或VIII族过渡金属的化合物,d)随后将 丙烯和1-丁烯,e)随后将d)中形成的1-丁烯返回到步骤a)和f),其中未反应的残液II在b)中的中间馏分D1取出,并部分还原为 步骤a)。

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