VERFAHREN ZUR ÄNDERUNG DES VORGEGEBENEN MITTLEREN MOLEKULARGEWICHT MN BEI DER KONTINUIERLICHEN HERSTELLUNG VON POLYTETRAHYDROFURANEN ODER THF COPOLYMEREN
    53.
    发明公开
    VERFAHREN ZUR ÄNDERUNG DES VORGEGEBENEN MITTLEREN MOLEKULARGEWICHT MN BEI DER KONTINUIERLICHEN HERSTELLUNG VON POLYTETRAHYDROFURANEN ODER THF COPOLYMEREN 有权
    METHOD FOR更改预定义MEAN分子量Mn的聚四氢呋喃或THF共聚物的连续生产过程中

    公开(公告)号:EP1999182A1

    公开(公告)日:2008-12-10

    申请号:EP07857306.0

    申请日:2007-12-10

    Applicant: BASF SE

    CPC classification number: C08G65/20 C08G65/2657 C08G65/266 C08G65/2696

    Abstract: The object of the present invention is a method for changing the predefined mean molecular weight Mn during the continuous production of polytetrahydrofurane, or tetrahydrofurane copolymers, the monoesters or diesters of polytetrahydrofurane, or tetrahydrofurane copolymers, by the polymerization of tetrahydrofurane in the presence of telogen and/or a comonomer on an acid catalyst, wherein: a) the mol ratio of telogen to tetrohydrofurane, or to tetrahydrofurane and the comonomer, is changed, b) then the mean molecular weight of at least one sample is determined, c) as long as the mean molecular weight determined in this way deviates from the molecular weight to be achieved by the change, the previously formed polytetrahydrofurane, or the tetrahydrofurane copolymers, the monoesters or diesters of the polytetrahydrofurane, or tetrahydrofurane copolymers, are at least partially depolymerized on an acid catalyst, and d) the tetrahydrofurane recaptured by means of depolymerization is returned at least partially to the polymerization process.

    VERFAHREN ZUM ABBAU VON FORMIATEN
    58.
    发明公开

    公开(公告)号:EP3116845A1

    公开(公告)日:2017-01-18

    申请号:EP15709452.5

    申请日:2015-03-05

    Applicant: BASF SE

    CPC classification number: C07C29/141 C07C29/90 C07C31/20

    Abstract: A method for the breakdown of formates in formate-containing substance mixtures, wherein the formate-containing substance mixtures are reacted in the presence of at least one lanthanum-containing heterogeneous catalyst at a temperature of 80 to 180 °C and at a pressure of 0.1 to 60 bar, and the formate-containing substance mixtures have a pH of 6.5 to 10. Formate-containing substance mixtures is understood to mean, in particular, substance mixtures comprising carbonyl compounds, which were formed, for example, by an aldol reaction of alkanones or alkanals with formaldehyde, such as, for example, methylolalkanals and the respective hydrogenation products thereof. Said products also contain formates in addition to the aforementioned carbonyl compounds.

    Abstract translation: 在含甲酸盐的物质组合物中分解甲酸盐的方法包括在至少一种包含镧的非均相催化剂存在下,在80-180℃的温度和0.1至0.1的压力下反应含甲酸盐的物质组合物 60巴,含有甲酸盐的组合物,其pH为6.5至10

    VERFAHREN ZUR REINIGUNG VON N-ALKYL-PYRROLIDONEN
    60.
    发明公开
    VERFAHREN ZUR REINIGUNG VON N-ALKYL-PYRROLIDONEN 有权
    清理方法N-烷基吡咯烷酮的

    公开(公告)号:EP2922819A1

    公开(公告)日:2015-09-30

    申请号:EP13792876.8

    申请日:2013-11-12

    Applicant: BASF SE

    CPC classification number: C07D207/267

    Abstract: The invention relates to a method for purifying N-alkylpyrrolidones that contain at least one of the contaminants of formula I or II, in which R stands for hydrogen or a C1 to C20 alkyl group, due to a prior use, characterized in that a basic compound is added to the N-alkylpyrrolidone to be purified and the temperature of the mixture is at least 80°C no later than 20 minutes after the addition of the basic compound and N-alkylpyrrolidone is removed from the obtained mixture by distillation.

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