Centre National De La Recherche Scientifique

Université Montpellier 2 Sciences Et Techniques

Universitè De Montpellier

Universitä{umlaut Over (c)}ü{umlaut Over ( )}ë De Montpellier

Claude Grison

Vincent Escande

Andrii Stanovych

Jose Escarre

Clemence Bes

David Carrasco

Brice-Loic Renard

José Escarre

The present invention relates to a method for preparing p-menthane-3,8-diol, characterised in that it comprises the following steps: a. preparation of an aqueous solution comprising between 0.05% and 5% by mass, preferably between 0.05% and 2% by mass, preferentially between 0.05% and 1% by mass, even more preferentially between 0.05% and 0.5% by mass of an ammonium salt, the said ammonium salt being characterised in that it is selected from the group formed by an amino acid ammonium salt, and in particular an amino acid hydrochloride, a vitamin B ammonium salt, and in particular a vitamin B hydrochloride, an ammonium salt of an amino acid ester, and an ammonium salt of a vitamin B ester, or is defined by the following formula (I): wherein Rrepresents a benzyl, optionally substituted, or Rrepresents an alkyl, either linear or branched, optionally cyclical, saturated or unsaturated, optionally substituted, comprising from 1 to 10 carbon atoms, preferably from 1 to 6 carbon atoms, preferentially from 2 to 4 carbon atoms, and R, Rand Rrepresent a hydrogen or a methyl group, and X represents a chlorine atom, bromine atom or an OR' group, R′ being an alkyl group comprising from 1 to 10 carbon atoms, b. adding of citronellal to the aqueous solution obtained in the step a), and obtaining a mixture; c. stirring and heating of the mixture obtained in the step b); d. decanting of the reaction medium obtained at the end of step c) and obtaining at least two phases; and e. separation of the said at least two phases obtained in the step d), and obtaining at least one aqueous phase and at least one organic phase, the said organic phase comprising at least p-menthane-3,8-diol.

Method for preparing an insect repellent agent

Compositions of manganese accumulating plants.

Compositions of certain manganese accumulating plants

Disclosed is a method for preparing a solid material including manganese, the method including the following steps: a. bringing into contact an aqueous effluent including manganese, for example at least 5 mg/L, typically at least 5 to 50 mg/L, and preferably 7 to 25 mg/L of manganese, with an oxidizing agent, manganese, preferably at a temperature between 10&#xb0; C. and 50&#xb0; C., and obtaining an oxidized aqueous solution; b. adding a base to the oxidized aqueous solution obtained at the end of step a) until a pH of between 8 and 12, preferably greater than 9, and preferably from 9 to 10.5, and obtaining a solution including a precipitate; c. filtration of the solution obtained at the end of step b); and d. obtaining a solid material including manganese, and especially manganese (IV) and/or Mn (III).

Treatment of quarry liquid effluent

Disclosed is a method for preparing a material of plant origin rich in phenolic acids, including at least one metal, including: preparing a material of plant origin chosen from: aquatic plants; materials rich in tannins; materials rich in lignin; and obtaining a material of plant origin, rich in phenolic acids, in which the ratio of the intensity of the vibration band of the C&#x2550;O bond of the COOH group and the intensity of each of the vibration bands the aromatic ring determined in FT-IR is between 0.5 and 4. The material of plant origin is brought into contact with an effluent including from 0.1 to 1000 mg/l of at least one metal, thus obtaining a material of plant origin rich in phenolic acids including from 1 to 30% by weight of at least one metal relative to the total weight of the material.

Method for the production of a material of plant origin that is rich in phenolic acids, comprising at least one metal, for carrying out organic synthesis reactions

The use, after heat treatment, of manganese accumulating plants for carrying out chemical reactions.

Use of certain manganese-accumulating plants for carrying out organic chemistry reactions

A method of implementing organic synthesis reactions uses a composition containing a metal catalyst originating from a calcined plant. The plants can be from the Brassicaceae, Sapotaceae and Convolvulaceae family, and the metal catalyst contains metal in the M(II) form such as zinc, nickel, manganese, lead, cadmium, calcium, magnesium or copper. Examples of the organic synthesis reactions include halogenations, electrophilic reactions, cycloadditions, transesterification reactions and coupling reactions, among others.

Use of metal-accumulating plants for the preparation of catalysts that can be used in chemical reactions

Disclosed is a method for reducing organic compounds using catalysts containing nickel (0) from metal hyperaccumulator plants. The method can be implemented in a green manner and is advantageous compared to methods using the known catalysts.

Use of certain transition metal hyperaccumulator plants for reducing organic compounds in a green manner

Disclosed is an adduct between a Lewis acid, preferably aluminum trichloride, iron trichloride, or zinc dichloride, and a hydrosilane;&#x2014;a method for preparing same; and a method for for reducing, particularly, an aldehyde, a ketone, an &#x3b1;,&#x3b2;-unsaturated ketone, an imine, or an &#x3b1;,&#x3b2;-unsaturated imine.

Hydrosilane/Lewis acid adduct, particularly aluminum, iron, and zinc, method for preparing same, and use of said same in reactions for reducing carbonyl derivatives

Disclosed is a process for preparing a product of formula I: wherein the reaction is catalyzed both by thiamine or a thiamine salt and by ascorbic acid in a form which is free or salified or an organic acid salt of an alkaline metal, preferably sodium acetate, potassium tartrate, sodium succinate, or a reductone, preferably 2-hydroxypropanedial or 2,3-dihydroxycyclopent-2-ene-1-one in an organic solvent.

Process for preparing synthesis intermediates using products of natural origin and use of the intermediates obtained

A composition derived from the acid treatment of ashes obtained after heat treatment of selected plants or plant material is provided. The selected plants accumulate metal from the platinum group (platinoids). The compositions can be used to produce catalysts for performing various organic synthesis reactions.

Uses of certain platinoid accumulating plants for use in organic chemical reactions

Use of metal-accumulating plants for implementing chemical reactions

The use of metal-accumulating plants for implementing chemical reactions.

Growing community of inventors

Castelnau le Lez, France

Claude Grison