中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

258 records (took 0.019 seconds)

    CATALYTIC SYSTEM FOR OLEFIN OXIDATION TO CARBONYL PRODUCTS
    121.
    发明专利
    CATALYTIC SYSTEM FOR OLEFIN OXIDATION TO CARBONYL PRODUCTS 未知

    公开(公告)号：CA2077548A1

    公开(公告)日：1991-09-06

    申请号：CA2077548

    申请日：1991-03-05

    Applicant: CATALYTICA INC

    Inventor： GRATE JOHN H ,  MAHAJAN SURESH ,  HAMM DAVID R ,  KLINGMAN KENNETH A ,  DOWNEY SHANNAN L

    IPC: B01J31/16 ,  B01J23/44 ,  B01J27/198 ,  B01J27/199 ,  C07B61/00 ,  C07C29/141 ,  C07C45/28 ,  C07C45/30 ,  C07C45/34 ,  C07C47/06 ,  C07C49/10 ,  C07C49/04 ,  C07C47/07 ,  C07C49/385

    Abstract: 2077548 9113853 PCTABS00007 The present invention provides reaction mixtures useful for oxidation of olefins to carbonyl products, comprising an olefin and an aqueous catalyst solution comprising a palladium catalyst, a polyoxoacid or polyoxoanion oxidant comprising vanadium, and dissolved olefin. It also provides processes for oxidation of olefins to carbonyl products, comprising mixing an olefin with an aqueous catalyst solution. It also provides processes for oxidation of olefins to carbonyl products by dioxygen, comprising mixing an olefin with an aqueous catalyst solution, and further comprising mixing dioxygen with the aqueous catalyst solution. In certain reaction mixtures and related processes of the present invention, the concentration of dissolved olefin in the aqueous catalyst solution is effective for its oxidation rate to not be limited by its rate of its diffusion into the aqueous solution. In other reaction mixtures and related processes of the present invention, the concentration of dissolved olefin in the aqueous catalyst solution is effective for its oxidation rate to be proportional to the palladium catalyst concentration. In other processes of the present invention, the olefin is mixed with the aqueous catalyst solution under mixing conditions effective for providing an olefin oxidation rate of at least 1 (millimole olefin/liter solution)/second. In other processes of the present invention, dioxygen is mixed with an aqueous reduced vanadium-polyoxoanion solution under mixing conditions effective for providing a dioxygen reaction rate of at least 1 (millimole dioxygen/liter solution)/second. In other reaction mixtures and related processes of the present invention, the aqueous solution is essentially free of sulfuric acid and sulfate ions.

    Process for preparing 2-oxindoles and N-hydroxy-2-oxindoles
    127.
    发明专利
    Process for preparing 2-oxindoles and N-hydroxy-2-oxindoles 未知

    公开(公告)号：AU694840B2

    公开(公告)日：1998-07-30

    申请号：AU4767396

    申请日：1996-01-25

    Applicant: CATALYTICA INC

    Inventor： GRUBER JOHN M ,  GRATE JOHN H ,  BULLS RAY A

    IPC: C07C201/12 ,  C07C205/56 ,  C07D209/34 ,  C07C69/612

    Abstract: The present invention provides a processes, having practical utility, for preparing 2-oxindoles, N-hydroxy-2-oxindoles, or mixtures thereof comprising: catalytically hydrogenating a 2-nitroarylmalonate diester to produce a 2-(N-hydroxyamino)arylmalonate diester, a 2-aminoarylmalonate diester, or mixtures thereof as a first reaction intermediate; cyclizing, by intramolecular aminolysis of one ester group, the first reaction intermediate to produce a N-hydroxy-2-oxindole-3-carboxylate ester, 2-oxindole-3-carboxylate ester, or mixtures thereof as a second reaction intermediate; and hydrolyzing and decarboxylating the remaining ester group of the second reaction intermediate to produce the N-hydroxy-2-oxindole, the 2-oxindole, or mixtures thereof, wherein the cyclization reaction and the hydrolysis and decarboxylation reaction are conducted in situ with the catalytic hydrogenation reaction without isolation of said reaction intermediates.

Patent Agency Ranking