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    PROCESS FOR PREPARING POLYAMIDES
    3.
    发明申请
    PROCESS FOR PREPARING POLYAMIDES 审中-公开

    公开(公告)号：WO2022248262A1

    公开(公告)日：2022-12-01

    申请号：PCT/EP2022/063130

    申请日：2022-05-16

    Applicant: BASF SE

    Inventor： SAUER, Juergen ,  PAHL, Melanie ,  NEGELE, Anton ,  HEIDER, Wolfgang ,  MUENCH, Uwe ,  LANGE, Christiane ,  HEIDEBRECHT, Peter

    IPC: C08G69/28 ,  B01J8/00 ,  B01J8/02

    Abstract: The invention relates to a process for a polyamide based on dicarboxylic acids and diamines, comprising the following stages: A) providing an aqueous monomer mixture composed of dicarboxylic acids and diamines; B) transferring the aqueous mixture from stage A) into a continuous evaporator reactor in which diamines and dicarboxylic acids are converted at a temperature in the range from 100 to 370°C and a pressure in the range from 2 to 51 bar (abs), the evaporator reactor being a vertical tube bundle reactor through which the flow is from the top downward; C) transferring the mixture from stage B) into a separator which is operated at a temperature in the range from 100 to 370°C and a pressure in the range from 1 to 50 bar with removal of gaseous components; wherein the tubes of the evaporator reactor have internals which direct the flow of the liquid phase of the mixture close to the wall towards the middle of the tubes and have free flow paths for the gas phase produced in the evaporator reactor over their axial length along the inner wall of the tubes.

    PREPARATION OF N-VINYL CARBOXAMIDES IN SERIES OF REACTOR UNITS
    4.
    发明申请
    PREPARATION OF N-VINYL CARBOXAMIDES IN SERIES OF REACTOR UNITS 审中-公开
    在反应器单元系列中制备N-乙烯基羧酰胺

    公开(公告)号：WO2017017559A1

    公开(公告)日：2017-02-02

    申请号：PCT/IB2016/054284

    申请日：2016-07-19

    Applicant: BASF SE ,  BASF (CHINA) COMPANY LIMITED

    Inventor： LANGE, Christiane ,  VALE, Hugo ,  HAEHNLE, Hans-Joachim ,  SOETJE, Oliver

    IPC: C08F26/02 ,  C08F2/01 ,  B01J8/06

    CPC classification number: B01J19/245 ,  C08F2/01 ,  C08F26/02

    Abstract: Provided is a process of producing polymers of a N-vinyl carboxamide comprising the steps of flowing a reaction mixture comprising an aqueous liquid containing at least one polymerisation initiator, N-vinyl carboxamide monomer or a monomer mixture which comprises N-vinyl carboxamide into a reactor system，polymerising the monomer or monomer mixture to produce the polymer of a N-vinyl carboxamide， in which the reactor system comprises a series of reactor units comprising a combination of at least one mixed flow reactor and at least one single pass tubular reactor，wherein i) the at least one mixed flow reactor comprises at least one vessel containing internal and/or external means of mixing; and ii) the at least one single pass tubular reactor comprises a tubular section disposed between two ends，at least one inlet and at least one outlet in which the reaction mixture flows through the single pass tubular reactor only once， wherein substantially none of the reaction mixture exits the single pass tubular reactor less than 0.5 of the mean residence time of the reaction mixture in a single pass tubular reactor. The polymers resulting therefrom may be hydrolysed to provide polymers containing vinyl amine units. Also provided are the apparatus suitable for producing said polymers.

    Abstract translation: 本发明提供了一种制备N-乙烯基甲酰胺聚合物的方法，包括将含有至少一种聚合引发剂，N-乙烯基甲酰胺单体或包含N-乙烯基甲酰胺的单体混合物的含水液体的反应混合物流入反应器 系统，聚合单体或单体混合物以产生N-乙烯基甲酰胺的聚合物，其中反应器系统包含一系列包含至少一个混合流反应器和至少一个单程管式反应器的组合的反应器单元，其中 i）所述至少一个混合流动反应器包括至少一个含有内部和/或外部混合装置的容器; 和ii）所述至少一个单程管式反应器包括设置在两端之间的管状部分，至少一个入口和至少一个出口，其中反应混合物仅通过单通管式反应器流过一次，其中基本上没有一个反应 混合物离开单通管式反应器，其反应混合物在单程管式反应器中的平均停留时间小于0.5。 由此得到的聚合物可以被水解以提供含有乙烯基胺单元的聚合物。 还提供了适合于生产所述聚合物的装置。

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