Societe Francaise Hoechst

Clariant Finance (bvi) Limited

Clariant International Ltd

Clariant (france) Sa

Christian Sidot

Yani Christidis

Gerd Reinhardt

Pierre Chevalier

Paul Mallo

Alain Blanc

Miriam Ladwig

Michael Best

Michel Tarlier

Audrey Caron

The invention relates to a method for producing manganese complex compounds of the general formula (1), wherein M, X, L, z, Y and q are defined as in claim. The method is characterized by the following steps: a) reacting one or more bivalent metal salts with the ligand L in water as the solvent to form a coordination compound from the one or more bivalent metal salt and the ligand L, the one or more bivalent metal salts being selected from bivalent manganese salts and iron salts and at least one bivalent metal salt being a bivalent manganese salt, b) oxidizing the coordination compound of step a) with an oxidant while at the same time maintaining a pH of 11 to 14, to transform the metal M from the bivalent to the trivalent and/or tetravalent form, c) reducing the pH of the reaction mixture to a pH of 4 to 9 and removing any metal oxides or metal hydroxides of the metal M formed and d) adding, at a pH of 4 to 9, a salt of the formula MezYq, wherein Me represents an alkali metal ion, ammonium ion or an alkanol ammonium ion, and Y, z and q are defined as in formula (1). 

Method for producing bridged manganese complexes of triazacyclononane

The invention relates to a method for producing metal complexes of formula (2) [MLX]Y(2), where M is a metal from the group consisting of Mn(II), Mn(III), Mn(IV), Fe(II), Fe(III) or Fe(IV), X is a coordinating compound selected from mono-, bi- or tri-charged anions or neutral molecules which can coordinate to a metal in mono-, bi- or tri-dentate form, Y represents a non-coordinating counter-ion which ensures charge equalization of the complex, L represents a ligand of formula (1) or the protonized or de-protonized form thereof, and a, x, n, m, R, R, R, Rand z have the meanings described in claim. Said method is characterized in that the reaction of one or more ligands of formula (1) with an iron salt or manganese salt is carried out in an acetone/water mixture in a temperature range from 0 to 50&#xb0; C. and for this purpose a solution or a suspension of the one or more ligands of formula (1) in acetone is brought in contact with an aqueous metal salt solution of the iron salt or manganese salt in the temperature range in which the reaction takes place. 

Method for producing 3,7-diaza-bicyclo[3.3.1]nonane metal complexes

In an industrial process for the manufacture of sodium orthohydroxymandelate by condensation of phenol in an inert atmosphere with glyoxylic acid in aqueous solution, in the presence of a tertiary amine and of catalytic quantities of a trivalent metal cation at a temperature below 100.degree. C., carried out continuously in at least two reactors (R1 . . . Rn) installed in series, the first being supplied by a first tank C1 containing the glyoxylic acid and the trivalent metal cations, and a second tank C2 containing the phenol and the tertiary amine, the reaction medium obtained at the outlet of the last of the at least two reactors and consisting of an aqueous phase and an organic phase is transferred into the first of two mixer-decanters (MD1 and MD2) installed in series, the aqueous phase of the first mixer-decanter MD1 is recovered in order to extract the expected sodium orthohydroxymandelate from it, while the organic phase that has come from MD1 is transferred into the second mixer-decanter MD2 and washed with water, and the organic phase of the second mixer-decanter MD2 is transferred to the second tank (C2).

Industrial process for the continuous preparation of sodium

A crystallized sodium orthohydroxymandelate-phenol-water complex, its preparation process in which phenol (P.sub.2) is introduced into an aqueous solution S at a pH comprised between 7 and 9.5 in order to obtain the expected product which is crystallized, the aqueous solution S being such as that resulting from the reaction of phenol (P.sub.1) with glyoxylic acid in the presence of a tertiary amine and of a trivalent cation, then treatment using a solution of an alkaline hydroxide, use of this complex for the preparation of sodium orthohydroxymandelate (NaOHM), preparation process for the latter from the starting complex.

Sodium orthohydroxymandelate/phenol/water complex, preparation process

Diallyloxyacetic acid and its basic addition salts, their preparation process and their application as cross-linking agents. Diallyloxyacetic acid and its basic addition salts, preparation process and application as cross-linking agents.

Method of cross-linking ethylene monomers using diallyloxyacetic acid

Preparation process for 5-(2-thenyl) hydantoin in which 5-(2-thenylidene) hydantoin is reacted in acetic acid with a phosphorous compound selected from the group consisting of red phosphorus and phosphonic acid, in the presence of a catalytic amount of an iodine compound selected from the group consisting of iodine and hydroiodic acid.

Process for reducing 5-(2-thenylidene) hydantoin to 5-(2-thenyl)

Preparation process for piperonal by decarboxylating oxidation of 3,4-methylenedioxy mandelic acid by nitric acid in aqueous medium in the presence of hydrochloric acid.

Preparation process for piperonal

An aqueous styrene-acrylic type polymer dispersion useful as a wet strength adhesive contains at least one copolymer consisting of 0.5 to 5% by weight of N-allylacetoacetamide monomer (A) and 99.5 to 95% by weight of a mixture of monomers (B) consisting of 90 to 99.9% by weight of styrene and of at least one monomer selected from C.sub.1 to C.sub.8 alkyl (meth)acrylates and 10 to 0.1% by weight of at least one monomer selected from acrylic acid, methacrylic acid, acrylamide and methacrylamide.

Aqueous dispersion of styrene-acrylic polymers and its application to

The process for preparing a novel product, pure crystalline methyl 2-acryloylamino-2-methoxyacetate, involves reacting pure crystalline, anhydrous acrylamido-glycolic acid in an anhydrous medium with methanol in the presence of hydrogen chloride. This is subsequently neutralized with an alkali metal bicarbonate, and then the mineral salts are filtered off. Finally, pure crystalline methyl 2-acryloylamino-2-methoxyacetate is obtained by taking up the concentrated reaction medium in 1,1,1-trichloroethane under vacuum.

Pure crystalline methyl 2-acryloylamino-2-methoxy acetate and a process

An aqueous styrene-acrylic type polymer dispersion useful as a wet strength adhesive contains at least one copolymer consisting of 0.5 to 5% by weight of N-allylacetoacetamide monomer (A) and 99.5 to 95% by weight of a mixture of monomers (B) consisting of 90 to 99.9% by weight of styrene and of at least one monomer selected from C.sub.1 to C.sub.8 alkyl(meth)acrylates and 10 to 0.1% by weight of at least one monomer selected from acrylic acid, methacrylic acid, acrylamide and methacrylamide.

This acid is prepared by a method comprising reacting acrylamide with glyoxylic acid in an aqueous solution at a concentration equal to or higher than 60% and at a temperature of between 30.degree. C. and 80.degree. C., this method being characterized in that this reaction is carried out at a pH of less than 7, in the absence of a catalyst of any type whatsoever but in the presence of an organic solvent selected from the group comprising ethyl acetate, butyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, tetrahydrofuran, diethylene glycol dimethyl ether.

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Ezanville, France

Christian Sidot