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104 records (took 0.031 seconds)

    71.
    发明专利
    未知

    公开(公告)号：DE502004002687D1

    公开(公告)日：2007-03-08

    申请号：DE502004002687

    申请日：2004-05-21

    Applicant: BASF AG

    Inventor： STORCK SEBASTIAN ,  ZUEHLKE JUERGEN ,  NETO SAMUEL ,  ROSOWSKI FRANK

    IPC: C07C51/265 ,  C07C51/31 ,  C07C63/16

    Abstract: A description is given of a process for preparing aldehydes, carboxylic acids and/or carboxylic anhydrides, in particular phthalic anhydride, in which a gaseous stream comprising an aromatic hydrocarbon and molecular oxygen is passed at elevated temperature over a bed of a first catalyst and a bed which is made up of a second catalyst having a higher activity than the first catalyst and is located downstream of the first catalyst in the flow direction of the gaseous stream, wherein the catalytically active composition of the first catalyst comprises at least vanadium oxide, titanium dioxide and antimony oxide and the ratio of vanadium, calculated as V 2 O 5 , to antimony, calculated as Sb 2 O 3 , in the first catalyst is from 3.5:1 to 5:1. The source of antimony oxide used for the first catalyst is preferably particulate antimony trioxide having a mean particle size of from 0.5 to 5 mum. The process allows the desired oxidation products to be obtained in high yield over longer periods of time.

    73.
    发明专利
    未知

    公开(公告)号：DE102005026360A1

    公开(公告)日：2006-12-28

    申请号：DE102005026360

    申请日：2005-06-07

    Applicant: BASF AG

    Inventor： NETO SAMUEL ,  ROSOWSKI FRANK ,  STORCK SEBASIEN ,  ZUEHLKE JUERGEN ,  ALLMANN HANS-MARTIN ,  LAUTENSACK THOMAS ,  STEEG RAINER

    IPC: B01J37/08

    Abstract: Processes comprising providing a catalyst precursor, and heating the catalyst precursor to a temperature of at least 350° C. in an atmosphere comprising air, wherein air is fed into the atmosphere at a rate of 0.05 to 4.0 standard m 3 /h, and wherein the catalyst precursor is activated at a temperature of at least 350° C. for more than 9 hours are described along with catalysts formed thereby and uses for such catalysts.

    74.
    发明专利
    未知

    公开(公告)号：BRPI0414770A

    公开(公告)日：2006-11-21

    申请号：BRPI0414770

    申请日：2004-09-24

    Applicant: BASF AG

    Inventor： NETO SAMUEL ,  RUMMEL WOLFGANG ,  STORCK SEBASTIAN ,  ZUEHLKE JUERGEN ,  ROSOWSKI FRANK

    IPC: B01J2/00 ,  B01J2/16 ,  B01J23/22 ,  B01J35/00 ,  B01J37/00 ,  B01J37/02 ,  C07C51/265

    Abstract: The invention relates to a process for producing a catalyst for gas-phase oxidations, which comprises weighing a particulate inert support having a total mass of M support into a fluidized-bed apparatus, providing an aqueous suspension of a catalytically active material or sources therefor and a binder having a binder content of B susp , fluidizing the inert support by introduction of a gas stream heated to a temperature of T gas at a flow rate of Q gas , and spraying the suspension at a rate of Q susp onto the fluidized inert support. When Q gas , Q susp , B susp , M support and T gas are selected within the ranges 3000 gas [m 3 /h] susp [g/min] susp [% by weight] support [kg] gas [° C.] K=0.020 Q gas -0.055 Q susp +7.500 B susp -0.667 M support +2.069 T gas -7 satisfies the relationship 127.5

    76.
    发明专利
    未知

    公开(公告)号：DE10335346A1

    公开(公告)日：2005-02-24

    申请号：DE10335346

    申请日：2003-08-01

    Applicant: BASF AG

    Inventor： NETO SAMUEL ,  ZUEHLKE JUERGEN ,  STORCK SEBASTIAN ,  ROSOWSKI FRANK

    IPC: B01J21/06 ,  B01J23/22 ,  B01J27/198 ,  B01J37/02 ,  C07C51/265 ,  B01J37/00 ,  B01J27/186

    Abstract: A catalyst for gas-phase oxidations which comprises an inert support and a catalytically active composition comprising transition metal oxides applied thereto, or a precatalyst, is described. The (pre)catalyst is obtained by treating the inert support with an aqueous suspension or solution of the transition metal oxides or their precursor compounds, where the suspension contains a binder dispersion and the binder is a copolymer of an alpha-olefin and a vinyl-C 2 -C 4 -carboxylate whose vinyl C 2 -C 4 -carboxylate content is at least 62 mol %.

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