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    51.
    发明专利
    未知

    公开(公告)号：NO964463L

    公开(公告)日：1996-10-21

    申请号：NO964463

    申请日：1996-10-21

    Applicant: RHONE POULENC CHIMIE

    Inventor： METIVIER PASCAL ,  JOUVE ISABELLE ,  MALIVERNEY CHRISTIAN

    IPC: B01J27/053 ,  C07B61/00 ,  C07C45/65 ,  C07C45/67 ,  C07C47/575 ,  C07C47/58 ,  C07C51/15 ,  C07C51/353 ,  C07C51/367 ,  C07C51/373 ,  C07C65/21

    Abstract: PCT No. PCT/FR96/00241 Sec. 371 Date Oct. 16, 1996 Sec. 102(e) Date Oct. 16, 1996 PCT Filed Feb. 14, 1996 PCT Pub. No. WO96/26175 PCT Pub. Date Aug. 29, 1996The subject of the present invention is a process for the preparation of a 4-hydroxybenzaldehyde carrying at least one substituent in the position ortho to the OH group. It more particularly relates to the preparation of 3-methoxy-4-hydroxybenzaldehyde and of 3-ethoxy-4-hydroxybenzaldehyde. The process for the preparation of a substituted 4-hydroxybenzaldlehyde, substituted at least in the 3 position by an alkoxy group, is characterized in that it comprises subjecting a substituted phenol compound, substituted at least in the 2 position by an alkoxy group and in which the 4 and 6 positions are free, to a first stage of carboxylation in the 6 position, then to a stage of hydroxymethylation in the 4 position, followed by a stage of oxidation of the hydroxymethyl group to a formyl group, and finally to a last decarboxylation stage.\!

    PROCESS FOR PREPARING MONO- AND DICARBOXYLIC ACIDS FROM UNSATURATED FATTY ACIDS AND/OR DERIVATIVES THEREOF
    56.
    发明专利
    PROCESS FOR PREPARING MONO- AND DICARBOXYLIC ACIDS FROM UNSATURATED FATTY ACIDS AND/OR DERIVATIVES THEREOF 未知

    公开(公告)号：CZ236695A3

    公开(公告)日：1996-05-15

    申请号：CZ236695

    申请日：1995-09-13

    Applicant: RHONE POULENC CHIMIE

    Inventor： DOS SANTOS EMMANUEL ,  METIVIER PASCAL

    IPC: B01J27/13 ,  B01J27/188 ,  B01J27/19 ,  B01J31/04 ,  C07B61/00 ,  C07C51/16 ,  C07C51/27 ,  C07C51/285 ,  C07C53/124 ,  C07C55/00 ,  C07C55/16 ,  C07C55/18 ,  C07C69/24 ,  C07C69/347 ,  C07C69/44 ,  C11C3/00

    Abstract: Prepn. of mono- and di-carboxylic acids from unsatd. fatty acids and/or derivs., comprises: (i) oxidising an unsatd. fatty acid, in the form of an acid and/or ester, with hydrogen peroxide in presence of a metal oxide or a carboxylic acid, opt. with a ruthenium catalyst; (ii) reacting the mixt. with nitric acid in presence of a vanadium catalyst, opt. with a co-catalyst; and (iii) recovering the mono- and di-carboxylic acids. The starting material is pref. a fatty acid with at least one double bond, an animal fat or oil, a vegetable oil, an ester of a pptd. fatty acid and is pref. oleic, colza, sunflower and soya oil. The ruthenium catalyst is pref. present in amt. of 1-35 % w.r.t. H2O2. H2O2 may be used with a gp. VIa metal catalyst, esp. a W and/or Mo catalyst in amt. of 1-35 (pref. 3-10) %, w.r.t. H2O2. The vanadium catalyst may be a V halide, a V oxide, a V oxyhalide, a V or vanadyl sulphate, an alkali metal or ammonium vanadate, or V acetylacetonate. The optional V co-catalyst may be based on a Gp. VIIa or VIII metal. A stoichiometric amt. of H2O2 or a 0-50 % excess is used with a carboxylic acid in a hydrogen peroxide : carboxylic acid molar ratio of 10-500 (pref. 10-40) %.

    PROCESS FOR THE PREPARATION OF PICRIC ACID
    58.
    发明专利
    PROCESS FOR THE PREPARATION OF PICRIC ACID 未知

    公开(公告)号：HU9502635D0

    公开(公告)日：1995-11-28

    申请号：HU9502635

    申请日：1995-09-08

    Applicant: RHONE POULENC CHIMIE

    Inventor： BERNARD LAURENT ,  METIVIER PASCAL

    IPC: C07C201/08 ,  C06B25/04 ,  C07C205/24

    Abstract: Prepn. of picric acid comprises nitrating o-nitrophenol and/or p-nitrophenol to dinitrophenols such that the intermediate(s) formed remain soluble in the reaction medium. Nitration is then continued to obtain picric acid which pptes. Either nitric acid or the nitrating mixt. is introduced into the nitrophenol; or the nitrophenol is progressively introduced to the reaction medium comprising nitric acid or the nitrating mixt.; or the nitrophenol and the nitric acid or nitrating mixt. are simultaneously introduced on a first bottoms mixt. comprising water or co-acid. The nitrating mixt. is nitric acid associated with a strong co-acid.

    59.
    发明专利
    未知

    公开(公告)号：FR2720071A1

    公开(公告)日：1995-11-24

    申请号：FR9406169

    申请日：1994-05-20

    Applicant: RHONE POULENC CHIMIE

    Inventor： METIVIER PASCAL ,  PARRON JEAN-CLAUDE

    IPC: C08J11/24 ,  C08G18/70

    Abstract: The present invention relates to a process for the preparation of polyurethane foams by reaction of at least one polyisocyanate, optionally in the presence of an expansion agent, with a composition obtained by reaction in an anhydrous medium of a polyurethane foam with a polyether polyol, having a molecular weight comprised between 2000 and 8000, the quality of foam being comprised between 10 and 40 % by weight with respect to the mass of polyether polyol and of polyurethane foam.

    60.
    发明专利
    未知

    公开(公告)号：DE69007814T2

    公开(公告)日：1994-11-10

    申请号：DE69007814

    申请日：1990-01-22

    Applicant: RHONE POULENC CHIMIE

    Inventor： DESMURS JEAN-ROGER ,  METIVIER PASCAL ,  PADILLA GENEVIEVE ,  RAJOHARISON HARIVELO

    IPC: C07C67/307 ,  C07C69/63 ,  C07C69/65

    Abstract: Process for the preparation of an optically active 2-chloropropionate ester of formula: R being an optionally substituted hydrocarbyl residue, from an optically active lactate of formula the said process being characterised in that the said lactate (I) is brought into contact with phosgene and a compound chosen from aliphatic amides, aliphatic lactams and aliphatic ureas. Use of the process for the manufacture of intermediates which are useful in the agrochemical industry.

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