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    • 52. 发明专利
    • METHOD FOR PRODUCING DINITRILES
    • CA2553028A1
    • 2005-08-11
    • CA2553028
    • 2005-01-27
    • BASF AG
    • JUNGKAMP TIMBAUMANN ROBERTBARTSCH MICHAELLUYKEN HERMANNHADERLEIN GERDSCHEIDEL JENS
    • C07C253/10C07C255/04
    • The invention relates to a method for producing adipodinitrile and methylglutar nitrile, said method being characterised by the following steps : (a) an educt flow containing pentenenitriles is reacted with hydrogen cyanid e in the presence of at least one catalyst and at least one promoter to obtain a reaction flow containing pentenenitriles, the at least one catalyst, catalys t breakdown products, the at least one promoter, adipodinitrile and methylglut ar nitrile; (b) the reaction flow is distilled to obtain a bottom product flow (3) that is depleted of pentenenitriles and contains the at least one catalyst, catalyst breakdown products, the at least one promoter, adipodinitrile and methylglutar nitrile, and a top product flow (4) enriched in pentenenitriles; (c) the flow (3) is extracted by an extraction means contained in flow (5) to obtain a top product flow (6) that is enriched with extraction means and contains the catalyst, and a bottom product flow (7) th at is depleted of extraction means and contains catalyst breakdown products, th e at least one promoter, pentenenitriles, adipodinitrile and methylglutar nitrile; (d) the flow (6) is distilled to obtain a bottom product flow (8) containing the catalyst, and a top product flow (9) containing the extractio n means; (e) the flow (7) is distilled to obtain a bottom product flow (10) containing catalyst breakdown products, the at least one promoter, pentene nitriles, adipodinitrile and methylglutarnitrile, and a top product flow (11 ) containing the extraction means; (f) the flow (10) is distilled to obtain a bottom product flow (12) containing catalyst breakdown products, the at leas t one promoter, pentenenitriles, adipodinitrile and methylglutarnitrile, and a top product flow (13) containing pentenenitriles; (g) the flow (12) is distilled to obtain a bottom product flow (14) containing catalyst breakdown products and the at least one promoter, and a top product flow (15) containi ng adipodinitrile and methylglutar nitrile; and (h) the flow (15) is distilled to obtain a bottom product flow (16) containing adipodinitrile, and a top produ ct flow (17) containing methylglutarnitrile.