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    61.
    发明专利
    未知

    公开(公告)号：BRPI0414626A

    公开(公告)日：2006-11-07

    申请号：BRPI0414626

    申请日：2004-09-24

    Applicant: BASF AG

    Inventor： REUTEMANN WERNER ,  WEBER THEODOR ,  ROSS KARL-HEINZ ,  JULIUS MANFRED

    IPC: C07C209/86 ,  C07C211/04 ,  C07C209/90 ,  C07C209/16

    Abstract: The invention relates to a method of avoiding corrosion in the separation of methylamine from a product stream ( 10 ) which is obtained in the preparation of methylamines by gas-phase reaction of methanol and ammonia and includes monomethylamine, dimethylamine, trimethylamine, ammonia and methanol as components, where ammonia is separated off by pure distillation in a first column ( 1 ), the remaining components of the product stream obtained as bottoms ( 12 ) are fed to a second column ( 2 ). Trimethylamine ( 14 ) is separated off in the second column ( 2 ) by extractive distillation with introduction of water. The further components of the product stream obtained as bottoms ( 15 ) from the second column ( 2 ) are fed to a third column ( 3 ), in which monomethylamine and dimethylamine are separated off at the top. The monomethylamine and dimethylamine are separated by distillation in a fourth column ( 4 ). To avoid corrosion alkali metal hydroxide is added to the second or third column ( 3 ).

    62.
    发明专利
    未知

    公开(公告)号：DE50107832D1

    公开(公告)日：2005-12-01

    申请号：DE50107832

    申请日：2001-02-28

    Applicant: BASF AG

    Inventor： STAMM ARMIN ,  KNEUPER HEINZ-JOSEF ,  HENKELMANN JOCHEM ,  WEBER THEODOR ,  BUSCH RALPH

    IPC: C07C51/58 ,  C07B61/00 ,  C07C51/60 ,  C07C55/40 ,  C07C53/50

    Abstract: The invention relates to a method for producing chlorocarboxylic acid chlorides of formula (I), wherein R and R , independently from one another, mean a hydrogen atom, an organic radical containing carbon, a halogen, a nitro or cyano group and Y means an alkylene chain having 1 to 10 carbon atoms in the chain which is unsubstituted or is substituted by organic radicals that contain carbon, by halogen, nitro and/or cyano groups, whereby the alkylene chain can be interrupted by an ether-, thioether-, tertiary amino- or keto group, whereby the organic radicals of Y and/or R and/or R can be connected to one another and thereby form a non-aromatic system, whereby said radicals contain carbon, by converting a lactone of formula (II), wherein R , R and Y have the aforementioned meanings, using a hydrogen chloride and phosgene in the presence of a catalyst. Hydrogen chloride is added before and/or while phosgene is added. The hydrogen chloride is only introduced at a temperature of at least 60 DEG C. A pyridine compound is used as the catalyst.

    63.
    发明专利
    未知

    公开(公告)号：DE10344282A1

    公开(公告)日：2005-04-21

    申请号：DE10344282

    申请日：2003-09-24

    Applicant: BASF AG

    Inventor： REUTEMANN WERNER ,  WEBER THEODOR ,  ROS KARL-HEINZ ,  JULIUS MANFRED

    IPC: C07C209/86 ,  C07C211/04

    Abstract: The invention relates to a method of avoiding corrosion in the separation of methylamine from a product stream ( 10 ) which is obtained in the preparation of methylamines by gas-phase reaction of methanol and ammonia and includes monomethylamine, dimethylamine, trimethylamine, ammonia and methanol as components, where ammonia is separated off by pure distillation in a first column ( 1 ), the remaining components of the product stream obtained as bottoms ( 12 ) are fed to a second column ( 2 ). Trimethylamine ( 14 ) is separated off in the second column ( 2 ) by extractive distillation with introduction of water. The further components of the product stream obtained as bottoms ( 15 ) from the second column ( 2 ) are fed to a third column ( 3 ), in which monomethylamine and dimethylamine are separated off at the top. The monomethylamine and dimethylamine are separated by distillation in a fourth column ( 4 ). To avoid corrosion alkali metal hydroxide is added to the second or third column ( 3 ).

    64.
    发明专利
    未知

    公开(公告)号：AT273266T

    公开(公告)日：2004-08-15

    申请号：AT00960571

    申请日：2000-08-31

    Applicant: BASF AG

    Inventor： BUSCH RALPH ,  KNEUPER HEINZ-JOSEF ,  WEBER THEODOR ,  MUELLER WINFRIED ,  STAMM ARMIN ,  HENKELMANN JOCHEM

    IPC: C07B61/00 ,  C07C51/60 ,  C07C51/64 ,  C07C53/42 ,  C07C57/66

    Abstract: The invention relates to a method for producing acid chlorides by converting carboxylic acids with carbon oxychlorides or thionyl chloride in the presence of a catalyst adduct of an N,N-disubstituted formamide of general formula (I) and carbon oxychloride or thionyl chloride. In the formula, R and R , independently from one another, mean C1- to C4-alkyl or R and R together mean a C4- or C5-alkylene chain. According to the inventive method, hydrogen chloride is added during and/or after the conversion.

    METHOD FOR THE CONTINUOUS PRODUCTION OF TETRA-SUBSTITUTED UREAS
    66.
    发明专利
    METHOD FOR THE CONTINUOUS PRODUCTION OF TETRA-SUBSTITUTED UREAS 未知

    公开(公告)号：CA2489408A1

    公开(公告)日：2004-01-22

    申请号：CA2489408

    申请日：2003-07-03

    Applicant: BASF AG

    Inventor： HENKELMANN JOCHEM ,  BUSCH RALPH ,  WEBER THEODOR ,  ROHDE THORSTEN

    IPC: C07C273/18 ,  C07C275/06

    Abstract: The invention relates to a method for producing tetra-substituted ureas by reacting the corresponding amines with phosgene in the presence of an aqueou s inorganic base at a temperature ranging of from 0 to 150 ~C. According to th e inventive method, the corresponding amine, the phosgene and the aqueous inorganic base are on average continuously fed to the reactor, a two-phase system is formed in the reactor by selecting the tetra-substituted ureas to be produced, by selecting the quantitative ratio of the substances and substanc e mixtures to be added, by selecting the temperature during reaction and optionally by adding an organic solvent that is not completely miscible with water, and the reaction mixture is discharged from the reactor in an on average continuous manner.

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