利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

4 条记录 (耗时 0.011 秒)

    Process for racemizing an optically active N-benzylidene amino-acid amide
    3.
    发明公开
    Process for racemizing an optically active N-benzylidene amino-acid amide 失效
    一种用于光学活性的N-Benzylidenaminosäureamids的外消旋化过程。

    公开(公告)号：EP0199407A1

    公开(公告)日：1986-10-29

    申请号：EP86200603.8

    申请日：1986-04-10

    申请人： STAMICARBON B.V.

    发明人： Boesten, Wilhelmus Hubertus Joseph ,  Schoemaker, Hans Egbert ,  Dassen, Bernardus Henricus Nicolaas

    IPC分类号： C07B55/00 ,  C07C237/30 ,  C12P13/04 ,  C12P41/00

    CPC分类号： C12P13/04 ,  C12P13/08 ,  C12P41/007

    摘要： The invention relates to a process for racemizing an optically active N-benzylidene amino-acid amide, characterized in that a solution of the N-benzylidene amino-acid amide is mixed in a water-miscible organic solvent with at least 0.05 mole strong base per litre solution.
    The invention further relates to a process for preparing an L-amino acid by enzymatic separation of the corresponding DL-amino-acid amide with an enzyme preparation from Pseudomonas putida, in which process also unconverted D-amino-acid amide is left behind in solution, characterized in that benzaldehyde is added to the solution, during which addition a precipitate of D-N-benzylidene amino-acid amide is being formed, this precipitate is subsequently, after being separated off, dissolved in an acetone-water mixture, 0.08-0.15 mole KOH/litre solution is subsequently added, the resulting solution is stirred for 1-20 hours at 20-60 ¤C, sulphuric acid is then added until the pH of the solution is 5 and the resulting sulphuric acid salt of the DL-amino-acid amide is finally, after isolation at pH 8-10, converted into the DL-amino-acid amide and this DL-amino-acid amide is used again.

    Process for the biological purification of waste water
    4.
    发明公开
    Process for the biological purification of waste water 失效
    一种用于废水生物净化过程。

    公开(公告)号：EP0000230A1

    公开(公告)日：1979-01-10

    申请号：EP78200057.4

    申请日：1978-06-21

    申请人： STAMICARBON B.V.

    发明人： Dassen, Bernardus Henricus Nicolaas

    IPC分类号： C02F1/02 ,  C02F1/66 ,  A23J1/00

    CPC分类号： C02F11/18 ,  A23J1/001 ,  Y10S426/807

    摘要： Process for the biological purification of waste water and process for the recovery of N-compounds including the steps of bringing the pH of the suspension of the surplus sludge at a value of between 8 and 11 and hydrolyzing it in the presence of a volatile base at a temperature of between 90 and 300°C, which base (preferably NH 3 ) is removed from the hydrolysate formed after termination ofthe hydrolysis.
    N-compounds can be recovered from the hydrolysate, which can also be converted to cattle feed.