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    Ketones prepd. from aldehydes, ketones and hydrogen - using catalyst contg. rare earth cpd. and group eight metal
    3.
    发明专利
    Ketones prepd. from aldehydes, ketones and hydrogen - using catalyst contg. rare earth cpd. and group eight metal 未知

    公开(公告)号：DE2615308A1

    公开(公告)日：1977-10-13

    申请号：DE2615308

    申请日：1976-04-08

    Applicant: BASF AG

    Inventor： NISSEN AXEL DIPL CHEM DR ,  WOERZ OTTO DIPL CHEM DR ,  HEILEN GERD DIPL CHEM DR ,  FLIEGE WERNER DIPL CHEM DR ,  WITTWER ARNOLD DIPL CHEM DR

    IPC: B01J23/63 ,  B01J23/83 ,  C07C45/73 ,  C07C45/74 ,  C07C49/00

    Abstract: A process for the prepn. of higher ketones of formula: R'CH2CH2COR2 comprises the reaction of an aldehyde of formula (I): R1-CHO with ketones of formula (II) CH3COR2 at 80-280 degrees C in the presence of hydrogen and a catalytic system, which contains an oxide or salt of a rare earth metal or mixts. of these and one or more Group VIII metals. In the above, R' is 1-20C alkyl, esp. 1-5C), aryl or cycloalkyl opt. substd. by alkyl, or 7-20C (pref. 7-10 C) aralkyl; the above gps. may also be substd. by OH or alkoxyl gps. inert to the reaction conditions; R2 is the same as R'. Typical cpds. are methyl isoamyl ketone used as a solvent and intermediate and 4-phenyl-butan-2-one used in perfumery. As a result of the catalyst which favours both the condensation and hydrogenation steps, the process is more selective, simpler, cheaper and gives higher yields compared with previous processes. Using acetone and methyl propanol, the catalyst is 10% Ni, 10% Co, 10% rare earth oxides (95% Nd2O3) on an alumina support giving a mixture contg. 40.8% starting materials and 34.3% 5-methylhexane-2-one. The pref. reaction temp. is 140-220 degrees C.

    (1)-Alkyl-allyl ester prodn. - by isomerisation of (3)-alkyl-allyl ester in presence of copper carboxylic acid and anhydride
    4.
    发明专利
    (1)-Alkyl-allyl ester prodn. - by isomerisation of (3)-alkyl-allyl ester in presence of copper carboxylic acid and anhydride 未知

    公开(公告)号：DE2611664A1

    公开(公告)日：1977-09-29

    申请号：DE2611664

    申请日：1976-03-19

    Applicant: BASF AG

    Inventor： HIMMELE WALTER DIPL CHEM DR ,  AQUILA WERNER DIPL CHEM DR ,  WOERZ OTTO DIPL CHEM DR

    IPC: C07C69/02

    Abstract: Prodn. of allyl esters (I) of the formula CH2=CH-CHR'-O-CO-R" (in which R' is 1-4C alkyl, opt. with an acyloxy substit. with max. 4C. alkyl or H) involves isomerisation of allyl esters (II) of the formula R'-CH=CH-CH2-O-CO-R" at elevated temp., as in DT 2406058, in the presence of Cu and/or Cu (I) or Cu (II) cpds. and in the presence of carboxylic acids (III). The improvement comprises the use of carbocylic anhydride (IV) in addn. to (III). (IV) pref. is the anhydride of (III), esp. acetic anhydride (IVa), and is used in an amt. of 0.1-10 mole-% wrt (III). In an example but-2-en-1,4-diyl acetate was isomerise to but-2-en-3,4-diyl acetate in the presence of (IVa) the yield being 10% and amt. of by-prods. 1%. If (IVa) was omitted, the yield was up to 2.5% and amt of by-prods. 1.5%. (I) are used as starting materials in organic syntheses.

    5.
    发明专利
    未知

    公开(公告)号：DE2928944A1

    公开(公告)日：1981-02-12

    申请号：DE2928944

    申请日：1979-07-18

    Applicant: BASF AG

    Inventor： NISSEN AXEL DIPL CHEM DR ,  KAIBEL GERD DIPL ING ,  REBAFKA WALTER DIPL CHEM DR ,  WOERZ OTTO DIPL CHEM DR ,  ARNOLD LOTHAR DIPL CHEM DR ,  BRAUN MANFRED

    IPC: C07C49/20 ,  B01J31/14 ,  C07C45/00 ,  C07C45/67 ,  C07C45/68 ,  C07C49/203 ,  C07C67/00

    Abstract: An improved process for the preparation of higher unsaturated ketones, such as geranylacetone and farnesylacetone, by reacting a beta , gamma -unsaturated alcohol and an alkyl acetoacetate at an elevated temperature in the presence of an organic aluminum compound, with elimination, and removal, of the alcohol derived from the alkyl acetoacetate in a reactor system carrying a fractionating column. The improvement in the purity, yield, and especially space-time yield of the product is achieved by starting from an alcohol having a higher boiling point than that of the alkyl acetoacetate used, carrying out the reaction in the presence of a small amount of an inert liquid which has a boiling point between that of the alkyl acetoacetate and the alcohol to be eliminated therefrom, and ensuring that the temperature at the bottom of the fractionating column is only slightly higher than the boiling point of the added liquid, under the prevailing pressure.

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