中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

27 records (took 0.064 seconds)

    REDUCTION OF AMINE CONTENT IN N-SUBSTITUTED LACTAM
    2.
    发明专利
    REDUCTION OF AMINE CONTENT IN N-SUBSTITUTED LACTAM 失效

    公开(公告)号：JP2000256314A

    公开(公告)日：2000-09-19

    申请号：JP2000065327

    申请日：2000-03-09

    Applicant: BASF AG

    Inventor： HENKES ERHARD ,  IFFLAND GABRIELE ,  CIPRIAN JUERGEN

    IPC: C07D223/10 ,  C07B63/00 ,  C07D201/16 ,  C07D207/26 ,  C07D207/267 ,  C07D207/27 ,  C07D211/14 ,  C07D225/02

    Abstract: PROBLEM TO BE SOLVED: To economically, selectively and efficiently reduce the concentration of amines existing in an N-substituted lactam as an impurity by treating a polluted N-substituted lactam with an acidic macroporous cation exchanger. SOLUTION: (A) An N-substituted lactam polluted with amines is treated with (B) an acidic macroporous cation exchanger. A strong acidic macroporous cation exchanger is used in the treatment and the component B has a styrene- divinylbenzene copolymer base material having 10-150 nm pore diameter. The usable capability of the component B is at least 0.5 mol of amines per 1 L of the cation exchanger and the component A is useful for purification of a compound expressed by the formula [R is a (substituted) saturated aliphatic group or the like; (n) is 1-4], especially for N-methyl-2-pyrrolidone, and the treatment is preferably performed at 5-130 deg.C.

    7.
    发明专利
    未知

    公开(公告)号：DE59906071D1

    公开(公告)日：2003-07-31

    申请号：DE59906071

    申请日：1999-04-15

    Applicant: BASF AG

    Inventor： AUER HEINZ ,  CIPRIAN JUERGEN ,  FRANZ LOTHAR ,  FRANZISCHKA WOLFGANG ,  IFFLAND GABRIELE ,  WECK ALEXANDER ,  WEINLE WERNER

    IPC: C08G65/20 ,  C08G65/30 ,  C08G65/32 ,  C08G65/331

    Abstract: The present invention relates to a process for preparing hydroxyl-containing polymers, in particular for preparing polytetrahydrofuran with terminal hydroxyl groups, from the corresponding acyloxy-containing polymers by transesterification with alcohols in the presence of an alkali metal- or alkaline earth metal-containing catalyst, which entails the appropriate acyloxy-containing polymer being introduced together with the alcohol and the catalyst into a first prereactor (I) and converted therein at least partly to the hydroxyl-containing polymer, and the reaction solution being fed into the upper zone (IIa) of a distillation column (II) into whose lower zone (IIb) alcohol in vapor phase is additionally fed. This involves a phase exchange at the coherent and the disperse phase at the transition from the prereactor to the distillation column. Preferably, in addition to the first prereactor, a further 3 prereactors are used which serve as holdup reactors.

    9.
    发明专利
    未知

    公开(公告)号：DE102005025900A1

    公开(公告)日：2006-12-07

    申请号：DE102005025900

    申请日：2005-06-06

    Applicant: BASF AG

    Inventor： SCHNEIDER JOERG ,  SCHERR GUENTER ,  ERHARDT RAINER ,  EICHFELDER ANDREAS ,  REIF MARTIN ,  HIRSCH STEFAN ,  SIEDER GEORG ,  HOLTMANN THOMAS ,  CIPRIAN JUERGEN ,  ASCHERL HERMANN

    IPC: C07D251/12 ,  B01D15/04

    Abstract: The invention relates to a process for removing salts from an alkanolic reaction mixture which is obtained in the preparation of alkoxycarbonylaminotriazines and comprises at least one alkoxycarbonylaminotriazine, at least one cyclic and/or acyclic carbonic ester, at least one C 1 -C 13 -alkanol which optionally comprises one or two oxygen atoms as ether bonds and is optionally substituted by C 1 -C 4 -alkyl and/or hydroxyl, and also at least one alkali metal alkoxide or alkaline earth metal alkoxide, with or without melamine and with or without catalyst, in which salts are removed from the reaction mixture by ion exchange over a cation exchanger and/or anion exchanger.

Patent Agency Ranking