32.
    发明专利
    未知

    公开(公告)号:MX173779B

    公开(公告)日:1994-03-25

    申请号:MX2049190

    申请日:1990-04-27

    Applicant: HOECHST AG

    Abstract: In the novel process for the purification of an alkylene oxide adduct which has been prepared using halogen-containing metal catalysts and contains halogen-containing compounds and metals as impurities, the alkylene oxide adduct to be purified is treated with an excess of the alkali metal compound, and the alkaline mixture obtained is brought to a pH of not more than 7 using an acid, with the proviso that the amount of water present in the resulting product mixture is at least 0.1% by weight, relative to the weight of the product. This product mixture is freed from water and other solvents, as a result of which the salts insoluble in the alkylene oxide adduct precipitate in the form of coarse crystals and can be easily separated off to give the desired pure alkylene oxide adduct.

    PROCESS FOR THE PURIFICATION OF ALKYLENE OXIDE ADDUCTS

    公开(公告)号:AU5387290A

    公开(公告)日:1990-11-01

    申请号:AU5387290

    申请日:1990-04-24

    Applicant: HOECHST AG

    Abstract: In the novel process for the purification of an alkylene oxide adduct which has been prepared using halogen-containing metal catalysts and contains halogen-containing compounds and metals as impurities, the alkylene oxide adduct to be purified is treated with an excess of the alkali metal compound, and the alkaline mixture obtained is brought to a pH of not more than 7 using an acid, with the proviso that the amount of water present in the resulting product mixture is at least 0.1% by weight, relative to the weight of the product. This product mixture is freed from water and other solvents, as a result of which the salts insoluble in the alkylene oxide adduct precipitate in the form of coarse crystals and can be easily separated off to give the desired pure alkylene oxide adduct.

    PROCESS FOR THE PURIFICATION OF ALKYLENE OXIDE ADDUCTS

    公开(公告)号:CA2015434A1

    公开(公告)日:1990-10-27

    申请号:CA2015434

    申请日:1990-04-25

    Applicant: HOECHST AG

    Abstract: HOE 89/F 906 Process for the purification of alkylene oxide adducts A novel process for the purification of an alkylene oxide adduct which has bean prepared using halogen-containing metal catalysts and contains halogen-containing compounds and also metals as impurities comprises treating the alkylene oxide adduct which is to be purified with an excess of alkali metal compound and adjusting the pH of the alkaline mixture obtained to a value of at most 7 using an acid, with the proviso that the water content of the product mixture which is then present is at least 0.1 % by weight, relative to the weight of the product. This product mixture is freed from water and other solvents, this resulting in the precipitation in coarse crystalline form of salts which are insoluble in the alkylene oxide adduct and which can be easily separated off to isolate the desired pure alkylene oxide adduct.

    35.
    发明专利
    未知

    公开(公告)号:MX160996A

    公开(公告)日:1990-06-29

    申请号:MX20556585

    申请日:1985-06-06

    Applicant: HOECHST AG

    Abstract: A process for the preparation of fatty acid esters of short-chain primary and secondary alcohols with 1 to 5 carbon atoms by transesterification of glycerides with the said short-chain alcohols is described. In this process, a stream of the gaseous alcohol is passed through the liquid glyceride at temperatures of at least 210 DEG C. and the product mixture of gylcerol and fatty acid alkyl ester is discharged from the reaction zone with this stream and is then subjected to phase separation.

    38.
    发明专利
    未知

    公开(公告)号:DD232913A5

    公开(公告)日:1986-02-12

    申请号:DD27705485

    申请日:1985-06-05

    Applicant: HOECHST AG

    Abstract: A process for the preparation of fatty acid esters of short-chain primary and secondary alcohols with 1 to 5 carbon atoms by transesterification of glycerides with the said short-chain alcohols is described. In this process, a stream of the gaseous alcohol is passed through the liquid glyceride at temperatures of at least 210 DEG C. and the product mixture of gylcerol and fatty acid alkyl ester is discharged from the reaction zone with this stream and is then subjected to phase separation.

    PREPARATION OF FATTY ACID ESTERS OF SHORT-CHAIN ALCOHOLS

    公开(公告)号:AU4339285A

    公开(公告)日:1985-12-12

    申请号:AU4339285

    申请日:1985-06-06

    Applicant: HOECHST AG

    Abstract: A process for the preparation of fatty acid esters of short-chain primary and secondary alcohols with 1 to 5 carbon atoms by transesterification of glycerides with the said short-chain alcohols is described. In this process, a stream of the gaseous alcohol is passed through the liquid glyceride at temperatures of at least 210 DEG C. and the product mixture of gylcerol and fatty acid alkyl ester is discharged from the reaction zone with this stream and is then subjected to phase separation.

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