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    CYCLIC ACYLPHOSPHINIC ACID DERIVATIVES AND PROCESS FOR THEIR PREPARATION
    1.
    发明专利
    CYCLIC ACYLPHOSPHINIC ACID DERIVATIVES AND PROCESS FOR THEIR PREPARATION 未知

    公开(公告)号：CA2067316A1

    公开(公告)日：1992-11-17

    申请号：CA2067316

    申请日：1992-04-27

    Applicant: HOECHST AG

    Inventor： SVARA JUERGEN

    IPC: C07F9/6574 ,  C07F9/6571 ,  G03C1/73 ,  G03F7/029

    Abstract: HOE 91/H 009 Cyclic Acylphosphinic acid derivatives and process for their preparation The invention relates to cyclic acylphosphinic acid derivatives of the formula in which the substituents independently of each other can have the following meaning: R1, R2, R3 = H, halogen, C1- to C10-alkyl or -alkoxy, phenyl, phenoxy, acetyl or NO2, where R1 and R2 together, with incorporation of the associated aromatic 6-ring, can also form an extended, unsubstituted or substituted aromatic ring system; R4 = C1- to C4-alkyl, C5- or C6-cycloalkyl, phenyl or alkylphenyl. The novel cyclic acylphosphinic acid derivatives can be prepared by reacting aromatic o-hydroxycarboxylic acids with organyldichlorophosphines of the formula R4PCl2 in an aprotic solvent or suspension medium at 0 to 200.degree.C with elimination of HCl and separating off, washing and drying the precipitated target product.

    PROCESS FOR THE PREPARATION OF TERTIARY PHOSPHINE OXIDES
    3.
    发明专利
    PROCESS FOR THE PREPARATION OF TERTIARY PHOSPHINE OXIDES 未知

    公开(公告)号：CA1309420C

    公开(公告)日：1992-10-27

    申请号：CA581939

    申请日：1988-11-02

    Applicant: HOECHST AG

    Inventor： SVARA JUERGEN ,  WEFERLING NORBERT

    IPC: C07F9/53

    Abstract: HOE 87/H 029 Process for the preparation of tertiary phosphine oxides of the disclosure: The invention relates to a process for the preparation of tertiary phosphine oxides by reacting primary or secondary phosphines with dimethyl carbonate under elevated pressure at elevated temperature.

    PROCESS FOR THE PREPARATION OF PHOSPHANES
    4.
    发明专利
    PROCESS FOR THE PREPARATION OF PHOSPHANES 未知

    公开(公告)号：CA1324393C

    公开(公告)日：1993-11-16

    申请号：CA576257

    申请日：1988-09-01

    Applicant: HOECHST AG

    Inventor： STELZER OTHMAR ,  LANGHANS KLAUS-PETER ,  SVARA JUERGEN ,  WEFERLING NORBERT

    IPC: C07B61/00 ,  B01J31/02 ,  B01J31/24 ,  C07C45/50 ,  C07F9/50

    Abstract: The invention relates to a process for the preparation of phosphanes of the formulae RnPH3-n (I) or (II) in which R represents a straight-chain or branched alkyl group having 1 to 24 carbon atoms or a cycloalkyl, benzyl or allyl group, n is 1 or 2, m corresponds to 2, 3 or 4 and A and B are identical or different and have either the meaning of R, hydrogen or a phenyl group, by reacting phosphene in the presence of a catalyst with reagents of the formula R-hal or hal(C(A)(B))mhal, in which R, A, B and m have the meanings mentioned and hal stands for chlorine or bromine, by using as a catalyst a tetraalkylammonium or tetraalkylphosphonium salt and carrying out the reaction in the presence of an aqueous alkali metal hydroxide solution at temperatures between -20 and 200 .degree.C and at a positive pressure of 0 to 10 bar, in which process for each mole of hal at least 1 mole of alkali metal hydroxide is used.

    CYCLIC ACYLPHOSPHINIC ACID DERIVATIVES AND PROCESS FOR THEIR PREPARATION
    5.
    发明专利
    CYCLIC ACYLPHOSPHINIC ACID DERIVATIVES AND PROCESS FOR THEIR PREPARATION 未知

    公开(公告)号：CA2067462A1

    公开(公告)日：1992-11-17

    申请号：CA2067462

    申请日：1992-04-28

    Applicant: HOECHST AG

    Inventor： SVARA JUERGEN

    IPC: C07F9/6574 ,  C07F9/6571 ,  G03C1/73 ,  G03F7/029

    Abstract: HOE 91/H 008 Cyclic acylphosphinic acid derivatives and process for their preparation The invention relates to novel cyclic acylphosphinic acid derivatives of the formula in which the substituents independently of each other can have the following meaning: R1, R2, R3, R4 = H, Cl, Br or C1- to C10-alkyl or -alkoxy, but on condition that either Rl and R2 together, or R3 and R4 together, with incorporation of the associated aromatic 6-ring, form a naphthalene structure; R5 = C1- to C4-alkyl, C5- or C6-cycloalkyl, phenyl or alkylphenyl. The novel cyclic acylphosphinic acid derivatives can be HOE 91/H 008 prepared by reacting the corresponding aromatic o-hy-droxycarboxylic acids with organyldichlorophosphines of the formula R5PCl2 in an aprotic solvent or suspension medium at 0 to 200.degree.C with elimination of HCl and by separating off and purifying the precipitated target product.

    6.
    发明专利
    未知

    公开(公告)号：DD287415A5

    公开(公告)日：1991-02-28

    申请号：DD33034789

    申请日：1989-07-04

    Applicant: HOECHST AG

    Inventor： SVARA JUERGEN ,  THUEMMLER URSUS

    IPC: B01D53/86 ,  B01J23/72 ,  B01J23/74 ,  B01J23/745 ,  B01J23/89 ,  B01D53/36

    Abstract: For removing hydrogen phosphide from waste air, the hydrogen phosphide-containing waste air is passed at temperatures from 50 DEG to 350 DEG C. over a catalyst which is composed, at least on its surface, of at least one metal which, in a 1-molar acidic aqueous solution, has a potential which is at least 200 mV more positive than that of the standard hydrogen electrode.

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