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    METHOD FOR SEPARATING TRIOXANE FROM A MIXTURE CONTAINING TRIOXANE, FORMALDEHYDE AND WATER
    21.
    发明专利
    METHOD FOR SEPARATING TRIOXANE FROM A MIXTURE CONTAINING TRIOXANE, FORMALDEHYDE AND WATER 未知

    公开(公告)号：CA2548640A1

    公开(公告)日：2005-07-14

    申请号：CA2548640

    申请日：2004-12-21

    Applicant: BASF AG

    Inventor： GRUETZNER THOMAS ,  STROEFER ECKHARD ,  HASSE HANS ,  BLAGOV SERGEJ ,  STAMMER ACHIM ,  OTT MICHAEL ,  SIEGERT MARKUS ,  FRIESE THORSTEN ,  LANG NEVEN

    IPC: B01D3/36 ,  B01D3/14 ,  C07D323/06

    Abstract: The invention relates to a method for separating trioxane from a mixture containing formaldehyde, trioxane and water. According to said method: the mixture (1) is distilled in a first distillation stage (7) at a pressure of between 0.1 and 2 bar to obtain a stream (8) containing formaldehyde and a stream (9) containing predominantly trioxane, in addition to water and formaldehyde; the stream (9) is mixed with a recycling stream (19) containin g predominantly trioxane, in addition to water and formaldehyde to form a stre am (10) containing predominantly trioxane, in addition to water and formaldehyd e; the stream (10) is then distilled in a second distillation stage (14) at a pressure of between 0.2 and 10 bar, optionally after the separation of low- boilers from the stream (9) or (10) in an additional distillation stage (11) . The pressure in the second distillation stage (14) is at least 0.1 bar highe r than the pressure in the first distillation stage (7). Said distillation produces a stream (15) consisting of trioxane and a stream (16) containing predominantly trioxane, in addition to water and formaldehyde. The stream (1 6) is then distilled in a third distillation stage (17) at a pressure of betwee n 0.1 and 4 bar, to obtain a stream (18) containing predominantly water, in addition to formaldehyde and the recycling stream (19) containing predominantly trioxane, in addition to water and formaldehyde. The resultant stream (18) is optionally distilled in a fourth distillation stage (20), to obtain a stream (21) containing predominantly water and a stream (22) containing predominantly formaldehyde.

    25.
    发明专利
    未知

    公开(公告)号：MXPA01009978A

    公开(公告)日：2002-02-28

    申请号：MXPA01009978

    申请日：2000-04-06

    Applicant: BASF AG

    Inventor： QUAISER STEFAN ,  STAMMER ACHIM ,  HOLZLE MARKUS ,  FISCHER MARTIN

    IPC: C01B15/026 ,  B01J23/40 ,  B01J23/44 ,  B01J23/46 ,  B01J23/62 ,  B01J35/10 ,  B01J37/02 ,  B01J37/03 ,  B01J37/16 ,  C01B15/029 ,  C07C29/145

    Abstract: The invention relates to a method for producing catalysts by immersion coating a metallic support with at least one platinum metal. An aqueous medium which comprises at least one platinum metal complex, at least one reduction agent and at least one complexer and which has a pH value of more than 4 is brought into contact with the metallic support in order to deposit the platinum metal, the platinum metal being deposited in the form of discreet, immobilised particles. The invention also relates to the catalysts obtained using this method and to their use for producing hydrogen peroxide and for hydrogenating organic compounds.

    26.
    发明专利
    未知

    公开(公告)号：DE19963444A1

    公开(公告)日：2001-07-12

    申请号：DE19963444

    申请日：1999-12-28

    Applicant: BASF AG

    Inventor： DERNBACH MATTHIAS ,  KRATZ DETLEF ,  STAMMER ACHIM ,  SCHULZ GERHARD

    IPC: C07C29/88 ,  C07C31/18 ,  C07C31/22

    Abstract: The invention relates to a method for the removal of trihydroxymethylpropyl formate from trihydroxymethylpropane, as produced by the hydrogenation of a 2,2-dimethylalkanal. An effective removal of said formate may be achieved by drying the raw solution of trihydroxymethylpropane, obtained from the hydrogenation and addition of ammonia, or primary and secondary amines in anhydrous form.

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