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    33.
    发明专利
    未知

    公开(公告)号：DE59601687D1

    公开(公告)日：1999-05-27

    申请号：DE59601687

    申请日：1996-01-19

    Applicant: BASF AG

    Inventor： HEINEKE DANIEL DR ,  SCHNEIDER HEINZ-WALTER DR ,  THOME ALFRED DR

    IPC: B01J23/42 ,  B01J23/92 ,  B01J23/96 ,  B01J37/16 ,  B01J38/64 ,  C01B21/14

    Abstract: The prodn. of a hydrogenation catalyst comprises the redn. of Pt in an oxidn. state of not less than 2 to Pt in an oxidn. state of zero. The process is carried out in aq. medium in the presence of carbon-contg. support, opt. after partial poisoning with S, As, Te or Sb cpds., using an ammonium or phosphonium salt of formula (XR4)nY (I) as the reducing agent, X = N or P, R = H, 1-18C alkyl, 5-10C cycloalkyl, Ph or Ph-substd. 1-4C alkyl (opt. with Ph gps. substd. with 1-3 halogen, nitro, amino or 1-6C alkyl gps.,) R may be the same or different, but not all H if X = P, n = 1-3, Y = organic anion. Also claimed is (i) a hydrogenation catalyst obtd. by this process, (ii) a process for the prodn. of hydroxylammonium salts by redn. of NO with hydrogen in the presence of this catalyst, (iii) a process for the regeneration of a Pt-based hydrogenation catalyst by the known method, using a cpd. (I) as reducing agent in the redn. of Pt to Pt .

    36.
    发明专利
    未知

    公开(公告)号：DE3883303D1

    公开(公告)日：1993-09-23

    申请号：DE3883303

    申请日：1988-06-08

    Applicant: BASF AG

    Inventor： BERTLEFF WERNER DR ,  FISCHER ROLF DR ,  KUMMER RUDOLF DR ,  MERGER FRANZ DR ,  SCHNEIDER HEINZ-WALTER DR

    IPC: C07B61/00 ,  C07C67/313 ,  C07C67/333 ,  C07C67/38 ,  C07C69/533 ,  C07C69/66 ,  C07C69/67 ,  C07C69/716

    Abstract: Prodn. of 5-formylvalerate esters (I) is carried out by : (a) hydroformylation of pentenate esters (II) with CO and H2 at elevated temp. and pressure in the presence of carbonyl complexes (III) of gp. VIII metals, to give a mixt. (IV) of 5-, 4- and 3-formylvalerate esters; (b) sepn. of (I) from (IV), leaving a mixt. (V) of 4- and 3-formylvalerate esters; (c) catalytic cracking of (V) at 50-400 deg. C, to give (II), which (d) are recirculated to stage (a). In stage (a), the Co concn. is pref. 0.05-0.3 mole-% w.r.t. (II), the (II) conversion is 10-50% and the temp. 60-160 deg. C. In stage (c), the catalyst pref. contains gp. VIII metal(s) and pref. is a supported catalyst contg. at least 2 gp. VIII noble metals or at least one gp. VIII noble metal plus Fe, Co and/or Ni. Pref. it may also contain Cu, Ag, Zn, Ti, V, Cr, Mo, W, Mn and/or Re. Cracking is carried out at 60-350 deg. C in (gas contg.) O2, pref. with a (V):O2 molar ratio of 1:0.05-3 and opt. in a diluent, esp. water and/or 1-6C alkanol(s).

    38.
    发明专利
    未知

    公开(公告)号：DE3719933A1

    公开(公告)日：1988-12-29

    申请号：DE3719933

    申请日：1987-06-15

    Applicant: BASF AG

    Inventor： BERTLEFF WERNER DR ,  FISCHER ROLF DR ,  KUMMER RUDOLF DR ,  MERGER FRANZ DR ,  SCHNEIDER HEINZ-WALTER DR

    IPC: C07B61/00 ,  C07C67/313 ,  C07C67/333 ,  C07C67/38 ,  C07C69/533 ,  C07C69/66 ,  C07C69/67 ,  C07C69/716

    Abstract: The preparation of 5-formylvaleric esters comprises the following steps… a) hydroformylation of pentenoic esters by reaction with carbon monoxide and hydrogen at elevated temperature and pressure in the presence of carbonyl complexes of metals from Group VIII of the Periodic Table with the formation of a mixture of 5-, 4- and 3-formylvaleric esters… b) separation of 5-formylvaleric esters from the mixture thus obtained of 5-, 4- and 3-formylvaleric esters, leaving a mixture substantially comprising 4- and 3-formylvaleric esters behind… c) cleavage of the mixture substantially comprising 4- and 3-formylvaleric esters to give pentenoic esters at a temperature of 50 to 400 DEG C in the presence of catalysts and… d) recycling of the pentenoic esters into step a.

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