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    Production of n-methylpiperazine
    1.
    发明授权
    Production of n-methylpiperazine 失效
    生产N-甲基哌嗪

    公开(公告)号：US3607874A

    公开(公告)日：1971-09-21

    申请号：US3607874D

    申请日：1968-11-21

    Applicant: BASF AG

    Inventor： FUERST ERNST ,  TOUSSAINT HERBERT ,  SOLD GEORG

    IPC: C07D295/023 ,  C07D51/66

    CPC classification number: C07D295/023 ,  Y02P20/582

    Abstract: Production of N-methylpiperazine by reaction of aqueous formaldehyde solution with piperazine followed by hydrogenation of the polymethylenepiperazine formed in the presence of known hydrogenation catalysts at superatmospheric pressure and elevated temperature, the reaction being carried out in the presence of acetic acid or piperazine acetate and the N,N''-dimethylpiperazine formed during the hydrogenation being distilled off as an azeotrope with water. N-methylpiperazine is used as a selective solvent for the extraction of aromatics from hydrocarbon mixtures.

    Production of n-formylmorpholine or n-acetylmorpholine
    2.
    发明授权
    Production of n-formylmorpholine or n-acetylmorpholine 失效
    N-甲基吗啉或N-乙酰基吗啉的生产

    公开(公告)号：US3558619A

    公开(公告)日：1971-01-26

    申请号：US3558619D

    申请日：1968-08-27

    Applicant: BASF AG

    Inventor： HOFFMANN HERWIG ,  FUERST ERNST ,  TOUSSAINT HERBERT

    IPC: C07D295/04 ,  C07D87/34

    CPC classification number: C07D295/04

    Abstract: PRODUCTION OF N-FORMYLMORPHOLINE OR N-ACETYLMORPHOLINE WHICH COMPRISES MIXING MORPHOLINE WITH FORMIC ACID OR ACETIC ACID AND DISTILLING OFF THE WATER FORMED FROM THE REACTION MIXTURE IN A COLUMN, A ZONE HAVING A TEMPERATURE OF FROM 130* TO 150*C. BEING MAINTAINED IN THE COLUMN ABOVE THE POINT OF SUPPLY AND A ZONE HAVING A TEMPERATURE OF FROM 210* TO 230*C. BEING MAINTAINED BELOW THE POINT OF SUPPLY. N-FORMYLMORPHOLINE AND NACETYLMORPHOLINE ARE SUITABLE AS EXTRACTANTS FOR AROMATIC HYDROCARBONS FROM HYDROCARBON MIXTURES.

    PRODUCTION OF PURE CONJUGATED C4 AND C5 DIOLEFINS FROM HYDROCARBON MIXTURES
    10.
    发明专利
    PRODUCTION OF PURE CONJUGATED C4 AND C5 DIOLEFINS FROM HYDROCARBON MIXTURES 未知

    公开(公告)号：CA980807A

    公开(公告)日：1975-12-30

    申请号：CA157352

    申请日：1972-11-21

    Applicant: BASF AG

    Inventor： WEITZ HANS-MARTIN ,  FUERST ERNST

    IPC: C07C1/00 ,  C07C7/00 ,  C07C7/08 ,  C07C7/10 ,  C07C7/11 ,  C07C11/12 ,  C07C13/02 ,  C07C67/00

    Abstract: 1401875 Extracting C 4 or C 5 conjugated diolefins BADISCHE ANILIN-& SODAFABRIK AG 24 Nov 1972 [26 Nov 1971] 54360/72 Heading C5E Pure C 4 or C 5 conjugated diolefins are separated from hydrocarbon mixtures by countercurrent gas scrubbing liquid-liquid extraction, extractive distillation and/or countercurrent distribution using as selective solvent a mixture of:- (a) 5-95 wt. per cent of an N-alkylpyrrolidone which may contain an inert substituent; and (b) 5-95 wt. per cent of an N-hydroxyalkyl compound of the general formula in which Y is C 2 or C 3 alkylene or alkenylene, or o-phenylene which may be wholly or partly hydrogenated R is a linear or branched alkylene and Z is oxygen or two hydrogens. The solvent mixture may contain up to 25 wt. per cent water. Preferred solvent components are (a) N-methylpyrrolidone; (b) N-hydroxyethylphthalimide, N-hydroxyethylsuccinimide and N-hydroxyethylpyrrolidone. The diolefins which may be separated by the process of the invention are butadiene, isoprene, 1,3-pentadiene and cyclopentadiene.

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