2.
    发明专利
    未知

    公开(公告)号:AT62654T

    公开(公告)日:1991-05-15

    申请号:AT88200860

    申请日:1988-05-03

    Applicant: STAMICARBON

    Abstract: The invention relates to the preparation of a benzaldehyde by hydrogenation of a corresponding benzoic acid in the gas phase in the presence of a manganese containing catalyst on an acid carrier. The invention is characterized in that use is made of a catalyst prepared by a) coprecipitation, at a pH between 7 and 10, of a manganese salt and a salt from which an acid carrier is formed, b) subsequent calcination at a temperature between 300 and 700 &loz& C, c) followed by reduction with a hydrogen containing gas mixture. Preferably the catalyst contains oxides of aluminium, zirconium, titanium, hafnium and/or niobium.

    8.
    发明专利
    未知

    公开(公告)号:BR8107857A

    公开(公告)日:1982-09-08

    申请号:BR8107857

    申请日:1981-12-03

    Applicant: STAMICARBON

    Abstract: The invention relates to a process for the preparation of cyclohexanol and/or cyclohexanone from cyclohexane, in which process the cyclohexane is dehydrogenated to cyclohexene preferably at a temperature of 200 to 700 DEG C and a pressure of 0.01 to 10 Mpa, the cyclohexene hydrated to cyclohexanol preferably at a temperature of -50 to 150 DEG C and a pressure of 0.01 to 10 MPa, and/or oxidized to cyclohexanone preferably at a temperature of 0 to 350 DEG C and a pressure of 0.01 to 200 MPa, the cyclohexanol and/or the cyclohexanone separated, and the unconverted cyclohexane and/or cyclohexene returned to the dehydrogenation step.

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