METHOD FOR THE PRODUCTION OF 1.6-HEXANEDIOL
    2.
    发明申请
    METHOD FOR THE PRODUCTION OF 1.6-HEXANEDIOL 审中-公开
    用于生产1,6-己二醇

    公开(公告)号:WO2004054948A8

    公开(公告)日:2005-06-23

    申请号:PCT/EP0313634

    申请日:2003-12-03

    CPC classification number: C07C29/177 C07C31/20

    Abstract: The invention relates to a method for producing 1,6-hexanediol having a purity of > 99.5 wt. % by catalytic dimerisation of acrylic acid esters, catalytic hydrogenation of the thus obtained hexene diacidic diester in order to form 1.6-hexanediol. Said method consists in: a) dimerising C1- C8-acrylic acid esters in the presence of at least one rhodium compound in order to form mixtures predominantly of 2- and 3-hexene diacdic diesters, b) hydrating the obtained dimerisation discharge in the presence of chrome-free catalysts containing mainly copper as a hydrogenation component and c) purifying the thus obtained raw 1.6-hexanediol by fractionating distillation.

    Abstract translation: 本发明涉及一种用于制备具有> 99.5重量%的纯度的1,6-己二醇,由丙烯酸酯,以这种方式获得成1,6-己二醇的二酯己烯的催化氢化方法,其包括催化二聚化:一个 )C1至C8丙烯酸酯在二聚的至少一种铑化合物的存在下,得到主要为2-和3-己烯二酯的混合物,b)中氢化在无铬的存在下将所得二聚化流出物,含有作为氢化主要是铜催化剂,和c)将如此得到的粗1 1,6-己二醇通过分馏进行纯化。

    6.
    发明专利
    未知

    公开(公告)号:AT334957T

    公开(公告)日:2006-08-15

    申请号:AT02792927

    申请日:2002-12-06

    Applicant: BASF AG

    Abstract: Trimethylolpropane is isolated from a reaction mixture which has been obtained by reaction of n-butyraldehyde with formaldehyde in the presence of a base and, if appropriate, hydrogenation of the resulting mixture by distilling the mixture by means of a dividing wall column or a distillation column with a precolumn or a distillation column with an after-column. The process has low capital costs and a low energy consumption and gives reduced formation of high-boiling by-products.

    8.
    发明专利
    未知

    公开(公告)号:BR0311166A

    公开(公告)日:2005-03-15

    申请号:BR0311166

    申请日:2003-05-21

    Applicant: BASF AG

    Abstract: The invention provides a process for preparing polyester polyols of polyhydric alcohols by mono- or polyesterification of at least one carboxylic acid having at least two acid groups and/or at least one derivative of a dicarboxylic acid with polyhydric alcohols, optionally with the addition of a catalyst, while removing the water of reaction, wherein the polyhydric alcohol used has a formaldehyde acetal content of less than 500 ppm.

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