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    22.
    发明专利
    未知

    公开(公告)号：NO20062261L

    公开(公告)日：2006-07-27

    申请号：NO20062261

    申请日：2006-05-19

    Applicant: BASF AG

    Inventor： HEINZ ROBERT ,  HAUK ALEXANDER ,  LENZ ROBERT ,  LOHMANN ANNA VALESKA ,  KARL JORN ,  PASCHOLD JUERGEN ,  GROPP STEFAN ,  LETZELTER THOMAS

    IPC: C07C51/41 ,  C07C51/09 ,  C07C53/02 ,  C07C53/06

    Abstract: A process is proposed for preparing acid formates in which a liquid stream I comprising formic acid and a liquid stream II comprising a metal formate are prepared, the liquid streams I and II are fed to a rectification column in such a manner that a higher or identical feed point to the rectification column is chosen for the liquid stream II than for the liquid stream I, the liquid streams I and II are mixed in the rectification column, with water being removed overhead from the rectification column and a bottoms stream comprising the acid formate is taken off from the rectification column, which comprises the bottoms stream being produced as melt comprising less than 0.5% by weight of water.

    27.
    发明专利
    未知

    公开(公告)号：DE59703774D1

    公开(公告)日：2001-07-19

    申请号：DE59703774

    申请日：1997-11-03

    Applicant: BASF AG

    Inventor： SCHOENHERR DR ,  RAULS DR ,  ASCHERL HERMANN ,  LETZELTER THOMAS ,  BAUMANN DIETER ,  POTTHOFF-KARL DR

    IPC: C11D1/04 ,  C07C227/42 ,  C07C229/16 ,  C07C229/24

    Abstract: A method for the preparation of a crystalline solid comprising a glycine-N,N-diacetic acid derivative of formula (I) with a very low hygroscopicity, comprises fixing the water content of the starting material containing (I) at 10-30 wt.% and then carrying out crystallisation: MOOC-CH(R)-N(CH2COOM)2 (I) R = 1-30C alkyl or 2-30C alkenyl (both optionally containing 1-5 OH, formyl, 1-4C alkoxy(carbonyl) or phenoxy groups and/or optionally containing up to 5 non-adjacent O atoms in the chain), alkoxylate groups of formula (II), phenyl-(1-20 C)-alkyl (optionally containing up to 3 1-4C alkyl, OH, carboxyl, sulpho or 1-4C alkoxycarbonyl ring substituents), 5- or 6-membered optionally benzalated heterocyclic ring containing up to 3 N, O or S atoms (optionally containing up to 3 1-4C alkyl, OH, carboxyl, sulpho or 1-4C alkoxycarbonyl substituents) or a group of formula (III): -(CH2)k-O-(A O)m-(A O)n-Y (II) -A-CH(COOM)-N(CH2COOM)2 (III) A , A = 2-4C 1,2-alkylene; Y = H, 1-12C alkyl, phenyl or 1-4C alkoxycarbonyl; k = 1-3; m, n = 0-50; A = 1-12C alkylene or single bond; and M = H, alkali(ne earth) metal or optionally substituted ammonium, with the provision that m+n = at least 4.

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