中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

63 records (took 0.031 seconds)

    34.
    发明专利
    未知

    公开(公告)号：ES2053860T3

    公开(公告)日：1994-08-01

    申请号：ES89107872

    申请日：1989-04-29

    Applicant: BASF AG

    Inventor： STECK WERNER DR ,  LERMER HELMUT DR ,  RUST HARALD ,  FRITZ GERHARD DR ,  SIEGEL HARDO DR

    IPC: B01J29/86 ,  B01J29/40 ,  B01J29/88 ,  C07B61/00 ,  C07C45/00 ,  C07C45/65 ,  C07C45/67 ,  C07C47/565 ,  C07C67/00

    Abstract: Hydroxybenzaldehydes of the formula (I) are prepared from a benzaldehyde of the formula (II) or its acetal, in which R1 in the R1O-phenyl ether group is an alkyl, cycloalkyl, alkylcycloalkyl or alkylaryl radical, R2 is H or OH or is identical to R1 and one or more R1O-phenyl ether groups are ortho, meta or para to the aldehyde function, by a process in which a benzaldehyde of the formula (II) or its acetal, in which R1 and R2 have the abovementioned meanings and one or more R1O-phenyl ether groups occupy the abovementioned position with respect to the aldehyde function, is converted into a hydroxybenzaldehyde of the formula (I) in the presence of water over a zeolite as a heterogeneous catalyst. The catalysts used are, in particular, zeolites of the pentasil type.

    35.
    发明专利
    未知

    公开(公告)号：DE58903204D1

    公开(公告)日：1993-02-18

    申请号：DE58903204

    申请日：1989-04-29

    Applicant: BASF AG

    Inventor： STECK WERNER DR ,  LERMER HELMUT DR ,  RUST HARALD ,  FRITZ GERHARD DR ,  SIEGEL HARDO DR

    IPC: B01J29/86 ,  B01J29/40 ,  B01J29/88 ,  C07B61/00 ,  C07C45/00 ,  C07C45/65 ,  C07C45/67 ,  C07C47/565 ,  C07C67/00

    Abstract: Hydroxybenzaldehydes of the formula (I) are prepared from a benzaldehyde of the formula (II) or its acetal, in which R1 in the R1O-phenyl ether group is an alkyl, cycloalkyl, alkylcycloalkyl or alkylaryl radical, R2 is H or OH or is identical to R1 and one or more R1O-phenyl ether groups are ortho, meta or para to the aldehyde function, by a process in which a benzaldehyde of the formula (II) or its acetal, in which R1 and R2 have the abovementioned meanings and one or more R1O-phenyl ether groups occupy the abovementioned position with respect to the aldehyde function, is converted into a hydroxybenzaldehyde of the formula (I) in the presence of water over a zeolite as a heterogeneous catalyst. The catalysts used are, in particular, zeolites of the pentasil type.

    36.
    发明专利
    未知

    公开(公告)号：DE3781593D1

    公开(公告)日：1992-10-15

    申请号：DE3781593

    申请日：1987-06-11

    Applicant: BASF AG

    Inventor： MAIR GUNTHER DR ,  STECK WERNER DR

    IPC: C01G53/00 ,  A61K49/18 ,  C01G49/00 ,  C01G51/00 ,  C09K9/00 ,  H01F1/36 ,  H01F1/37 ,  H01F1/44

    Abstract: The general compsn. of the particles is : MvMnwZnxFeyOz in which M is Co and/or Ni, v and w vary from 0-0.998 but are not both equal to 0 at the same time, x is 0.001-0.998, y is 2.001-2.998 and z is 3.001-4 with the restrictions : v+w+x = 0.002-0.998 and v+w+x+y=3. The particles are pref. coated with anionic tensids or acid phosphoric-acid esters and dispersed in a resp. non-polar or polar liq. forming a colloid. They are mfd. by pptn. from a watery soln. contg. the metal-salts by a base and, in the case of a non-polar suspension, coated with tensids. The particle are then flocculated by adding methanol, sepd. from the liq. and redispersed in a non-polar liq.. They can then be re-ppted., sepd. and redispersed in a non-polar liq. several times. Alternatively the particles are coated with an acid phosphoric acid ester after pptn. from the metal-salt soln.. The particles are then transferred into a polar liq. with a higher b.pt. than water, pref. 110-250 deg.C, by mixing and boiling off the water. Then the suspension is mixed with a second polar liq. with an even higher b.pt. and the first polar liq. removed. In both above methods the dispersion may be washed with a watery base and then with water until the effluent is neutral. The processing is pref. carried out in an inert gas ambient.

    37.
    发明专利
    未知

    公开(公告)号：DE3926290A1

    公开(公告)日：1991-02-14

    申请号：DE3926290

    申请日：1989-08-09

    Applicant: BASF AG

    Inventor： STECK WERNER DR ,  LERMER HELMUT DR ,  SCHWARZMANN MATTHIAS DR ,  DOCKNER TONI DR

    IPC: C07C37/00

    Abstract: A process for the preparation of mixtures of isomeric cresols with a molar ratio of para- to meta-cresol of from 0.6:1 to 10:1 by isomerization of cresol mixtures or ortho- and/or metal-cresol on zeolite catalysts of the pentasil type in the gas phase at from 300 DEG to 600 DEG C. under from 0.01 to 50 bar entails the mean particle size of the zeolite catalyst being at leat 3 mu m, and the selectivity in the established test for the disproportionation of ethylbenzene to diethylbenzene isomers being at least 60% for para-diethylbenzene.

Patent Agency Ranking