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    2,2-Dimethyl 1,3-propandiol hydroxypivalates - by disproportionating hydroxypivalaldehyde
    3.
    发明专利
    2,2-Dimethyl 1,3-propandiol hydroxypivalates - by disproportionating hydroxypivalaldehyde 未知

    公开(公告)号：DE2233357A1

    公开(公告)日：1974-01-31

    申请号：DE2233357

    申请日：1972-07-07

    Applicant: BASF AG

    Inventor： MERGER FRANZ DR ,  DUEMBGEN GERD DR ,  FUCHS WERNER DR

    IPC: C07C69/675 ,  C07C69/66

    Abstract: 1,3-propanediol hydroxypivalic acid monoester (I) prepn. of disporportionating hydroxypivalaldehyde (II) at increased temp in presence of the hydroxide of Ca, Ba or Sr, as in parent patent, is improved by reaction in presence of Ca(OH)2, Ba(OH)2, or Sr(OH)2 and of water, or in presence of >=1 oxide and/or hydroxide of Li, Mg, Tl, Pb, Bi, La, Ce, Zn, Cd, Mn, Fe, Co, Ni and/or oxides to Ca, Sr and Ba, opt. in presence of water, in place of or in addn. to the hydroxides of Ca, Ba, or Sr. Yields and space-time yields are higher and a pure prod. is obtd. The rate of reaction is greater, and the reaction may be carried out at room temp. (II) may be pure, or the impure prod. of reaction of isobutyraldehyde with HCHO. The ester prepd. in presence of water may be purified over acid ion-exchangers. (I) is a raw material for synthetic resins and softeners.

    2, 2-dimethylpropane diol-1, 3 from hydroxy- - pivalic acid and mixture of product and its
    5.
    发明专利
    2, 2-dimethylpropane diol-1, 3 from hydroxy- - pivalic acid and mixture of product and its 未知

    公开(公告)号：DE2000872A1

    公开(公告)日：1971-07-15

    申请号：DE2000872

    申请日：1970-01-09

    Applicant: BASF AG

    Inventor： MERGER FRANZ DR ,  FUCHS WERNER DR

    IPC: C07C45/75 ,  C07C

    Abstract: Mixture contg. hydroxypivalic aldehyde and 2,2-dimethylpropanediol-1,3 and/or its esters is used in place of hydroxypivalic aldehyde for production of 2,2-dimethylpropanediol-1,3 in process according to DT 1,800,506, where hydroxypivalic aldehyde is reacted with HCHO in 1.2:1 to 1:1.2 mole ratio in the presence of inorganic basic cpds. and of 5-50 wt. % water, calc. on reaction mixture, at temp. >65 degrees C for 2-40 min. Modified starting mixture allows economic use of first run obtained in hydroxypivalic aldehyde disproportionation, and is combined with hydroxypivalic aldehyde synthesis from HCHO and isobutyraldehyde.

    Dehydrogenation of organic cpds - in presence of halogen and oxygen, using after-reactor with fixed catalyst
    7.
    发明专利
    Dehydrogenation of organic cpds - in presence of halogen and oxygen, using after-reactor with fixed catalyst 未知

    公开(公告)号：DE2144149A1

    公开(公告)日：1973-03-15

    申请号：DE2144149

    申请日：1971-09-03

    Applicant: BASF AG

    Inventor： BRESSEL ULRICH DR ,  FUCHS WERNER DR ,  PLATZ ROLF DR

    IPC: C07C5/56 ,  C07B3/00

    Abstract: Dehydrogenation of volatile 2-20C organic cpds in the presence of halogen (source) and O2 at 400-800 degrees C, in which most of the reactants are introduced through nozzles at is not 5 m/s into (consecutive) mixing zone(s) along the reactor, is carried out in a reactor with the dia. of the first mixing zone 2-100 times the nozzle dia. and length 3-30 times its dia. the mixing zone being at the lower end (in the flow direction) of a circulation tube with dia. 0.1-0.95 times the inside dia of the reaction zone, as in DT 2144148. The reaction gases leaving the reaction zone are allowed to react to completion in an after-reactor contg. a fixed catalyst. This process is suitable for dehydrogenation of such cpds. as methyl isobutyrate to methyl methacrylate in high yield (78%) and conversion (41%) and also ethylbenzene and cumene. A MgSiO3/Co3O4 catalyst is pref.

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