Manufacture of esters
    25.
    发明专利

    公开(公告)号:AU2006314805B2

    公开(公告)日:2012-02-02

    申请号:AU2006314805

    申请日:2006-11-09

    Applicant: BASF SE

    Abstract: The invention relates to a process in which a compound RCOOR (I) is made by a transesterification reaction of an ester compound RCOOR (II) with an alcohol ROH (III) in the presence of a transesterification catalyst, wherein R is H or C alkyl or CH=CR-; R is C alkyl; R is selected from the group consisting of alkyl having at least 4 carbon atoms, cycloalkyl having at least 5 carbon atoms, aryl, aralkyl, alkaryl and amino alkyl; and R is -H or - C alkyl, wherein alcohol ROH (IV) is formed as a byproduct and in which said byproduct (IV) is removed by distillation in the presence of an entrainer, in which the entrainer is a compound that suppresses the formation of an azeotrope between compound (II) and byproduct (IV). The process can be useful in the preparation of esters such as dimethyl amino ethyl (meth) acrylate. The invention also provides a method of separating alcohols and esters. In a further form of the invention a process of preparing esters by a transesterification process is provided in which the transesterification catalyst is homogenous.

    DISPERSIONES ACUOSAS DE DIMEROS DE ALQUILCETENO.

    公开(公告)号:ES2332387T3

    公开(公告)日:2010-02-03

    申请号:ES07729773

    申请日:2007-06-01

    Applicant: BASF SE

    Abstract: Dispersiones acuosas de dímeros de alquilceteno, que contienen, al menos, un 15% en peso de un dímero de alquilceteno así como, al menos, un almidón catiónico soluble en agua, sulfato de aluminio y, al menos, un producto de condensación formado por el ácido naftalinsulfónico y el formaldehído o por el ácido lignosulfónico o respectivamente sus sales, caracterizadas porque las dispersiones contienen, referido respectivamente al dímero de alquilceteno, desde un 2 hasta un 50% en peso de sulfato de aluminio, conteniendo las dispersiones, además, entre un 0,1 y un 5% en peso de un ácido carboxílico saturado con 1 hasta 10 átomos de carbono, de ácido bencenosulfónico, de ácido ptoluenosulfónico y/o de un ácido mineral, con un contenido en sulfato de aluminio comprendido entre un 2 y un 15% en peso.

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