REDUCTION OF AMINE CONTENT IN N-SUBSTITUTED LACTAM

    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

    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.

    4.
    发明专利
    未知

    公开(公告)号:DE50308078D1

    公开(公告)日:2007-10-11

    申请号:DE50308078

    申请日:2003-08-06

    Applicant: BASF AG

    Abstract: Pure isophorone-diamine (IPDA) with a cis/trans isomer ratio (CTR) of at least 73/27 is obtained by (a) making crude IPDA with a CTR below 73/27, (b) purifying and separating into fractions with CTR of at least 73/27 (b1) and below 63/37 (b2), (c) isomerizing (b2) in presence of hydrogen, ammonia and catalyst to give IPDA with a CTR of 63/37-66/34 which is recycled to stage (a). A method (M1) for the production of substantially pure 3-aminomethyl-3,5,5-trimethyl cyclohexylamine (isophorone-diamine; IPDA) with a cis/trans isomer ratio (CTR) of at least 73/27 involves: (a) preparation of crude IPDA with a CTR of less than 73/27, (b) purification and separation to give fractions (b1) with a CTR of at least 73/27 and (b2) with a CTR of less than 63/27 and (c) isomerization of (b2) in presence of hydrogen, ammonia and a hydrogenation catalyst to give IPDA with a CTR of 63/37-66/34 which is then recycled to stage (a). An Independent claim is also included for a method (M2) for the production of IPDA with a CTR in the range 63/37 to 66/34 by reacting IPDA with any CTR value with hydrogen and ammonia in presence of a hydrogenation catalyst.

    5.
    发明专利
    未知

    公开(公告)号:AT371638T

    公开(公告)日:2007-09-15

    申请号:AT03790870

    申请日:2003-08-06

    Applicant: BASF AG

    Abstract: Pure isophorone-diamine (IPDA) with a cis/trans isomer ratio (CTR) of at least 73/27 is obtained by (a) making crude IPDA with a CTR below 73/27, (b) purifying and separating into fractions with CTR of at least 73/27 (b1) and below 63/37 (b2), (c) isomerizing (b2) in presence of hydrogen, ammonia and catalyst to give IPDA with a CTR of 63/37-66/34 which is recycled to stage (a). A method (M1) for the production of substantially pure 3-aminomethyl-3,5,5-trimethyl cyclohexylamine (isophorone-diamine; IPDA) with a cis/trans isomer ratio (CTR) of at least 73/27 involves: (a) preparation of crude IPDA with a CTR of less than 73/27, (b) purification and separation to give fractions (b1) with a CTR of at least 73/27 and (b2) with a CTR of less than 63/27 and (c) isomerization of (b2) in presence of hydrogen, ammonia and a hydrogenation catalyst to give IPDA with a CTR of 63/37-66/34 which is then recycled to stage (a). An Independent claim is also included for a method (M2) for the production of IPDA with a CTR in the range 63/37 to 66/34 by reacting IPDA with any CTR value with hydrogen and ammonia in presence of a hydrogenation catalyst.

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