Abstract

The present invention concerns a method for the metathesis of an olefin or olefins and, more specifically, of a fatty acid or fatty acids comprising at least one unsaturation. The method according to the invention comprises bringing said fatty acid into contact with a metathesis catalyst, in which the fatty acid is treated by a sorbent before being brought into contact with the metathesis catalyst, the sorbent having a pH lower than or equal to 7.5 and comprising at least 50% by weight of SiO2 and at least 5% by weight of Al2O3, the weight percentages being given relative to the total weight of sorbent.

IPC Classes  ?

• C07C 51/353 - Preparation of carboxylic acids or their salts, halides, or anhydrides by reactions not involving formation of carboxyl groups by isomerisationPreparation of carboxylic acids or their salts, halides, or anhydrides by reactions not involving formation of carboxyl groups by change of size of the carbon skeleton
• C07C 51/47 - SeparationPurificationStabilisationUse of additives by solid-liquid treatmentSeparationPurificationStabilisationUse of additives by chemisorption

Abstract

The present invention concerns a method for the metathesis of an olefin or olefins and, more specifically, of one or more fatty acid esters comprising at least one unsaturation. The method according to the invention comprises bringing at least one fatty acid ester into contact with a metathesis catalyst, in which the fatty acid ester is treated by a sorbent before being brought into contact with the metathesis catalyst, the sorbent having a pH lower than 6.0 and comprising at least 65% by weight of SiO2, the weight percentage being given relative to the total weight of sorbent.

IPC Classes  ?

• C07C 67/475 - Preparation of carboxylic acid esters by splitting of carbon-to-carbon bonds and redistribution, e.g. disproportionation or migration of groups between different molecules
• C07C 69/533 - Monocarboxylic acid esters having only one carbon-to-carbon double bond
• C07C 69/58 - Esters of straight chain acids with eighteen carbon atoms in the acid moiety
• C07C 69/593 - Dicarboxylic acid esters having only one carbon-to-carbon double bond
• C07C 69/602 - Dicarboxylic acid esters having at least two carbon-to-carbon double bonds

Abstract

The present invention relates to compositions for solubilising solid organic ultraviolet filters (UV). In particular, it concerns a composition comprising a combination of a first solvent and a second solvent, the first solvent being chosen from esters, the second solvent being chosen from alcohols, and one or a plurality of solid organic UV filter(s). It also concerns methods for preparing the compositions according to the invention and the uses thereof, in particular for producing products offering protection against UV radiation.

IPC Classes  ?

• A61K 8/34 - Alcohols
• A61K 8/35 - Ketones, e.g. quinones, benzophenone
• A61K 8/37 - Esters of carboxylic acids
• A61K 8/41 - Amines
• A61K 8/49 - Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
• A61Q 17/04 - Topical preparations for affording protection against sunlight or other radiationTopical sun tanning preparations

Abstract

The invention relates to a process for preparing a carboxylic acid, comprising a step of bringing at least one vicinal diol or at least one vicinal polyol into contact with an atmosphere comprising oxygen, and a catalyst, and in the absence of additional solvent.

IPC Classes  ?

• C07C 67/313 - Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by introduction of doubly bound oxygen containing functional groups, e.g. carboxyl groups
• C07C 51/23 - Preparation of carboxylic acids or their salts, halides, or anhydrides by oxidation with molecular oxygen of oxygen-containing groups to carboxyl groups
• C07C 69/67 - Esters of carboxylic acids having esterified carboxyl groups bound to acyclic carbon atoms and having any of the groups OH, O-metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety of saturated acids
• C07C 53/126 - Acids containing more than four carbon atoms
• C07C 51/245 - Preparation of carboxylic acids or their salts, halides, or anhydrides by oxidation with molecular oxygen of oxygen-containing groups to carboxyl groups of keto groups or secondary alcohol groups

Abstract

Process for preparing lactic acid, comprising a step of glycerol conversion in the presence of a heterogeneous catalyst based on platinum on zirconium, in a basic medium under an inert atmosphere.

IPC Classes  ?

• C07C 29/60 - Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by elimination of hydroxy groups, e.g. by dehydration
• C07C 31/20 - Dihydroxylic alcohols
• C07C 51/295 - Preparation of carboxylic acids or their salts, halides, or anhydrides by oxidation with inorganic bases, e.g. by alkali fusion
• C07C 59/08 - Lactic acid

Abstract

A process for preparing a carboxylic acid, by oxidative cleavage of at least one vicinal diol, or an epoxide, wherein the reaction is carried out in the presence of a catalyst and of an oxidizing agent and in the absence of solvent.

IPC Classes  ?

• C07C 51/23 - Preparation of carboxylic acids or their salts, halides, or anhydrides by oxidation with molecular oxygen of oxygen-containing groups to carboxyl groups
• C07D 317/12 - Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 not condensed with other rings with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to ring carbon atoms
• C07C 55/02 - Dicarboxylic acids
• C07C 55/18 - Azelaic acid
• C07C 53/126 - Acids containing more than four carbon atoms
• C07C 51/25 - Preparation of carboxylic acids or their salts, halides, or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring
• C07C 51/31 - Preparation of carboxylic acids or their salts, halides, or anhydrides by oxidation of cyclic compounds with ring-splitting
• C07C 51/367 - Preparation of carboxylic acids or their salts, halides, or anhydrides by reactions not involving formation of carboxyl groups by introduction of functional groups containing oxygen only in singly bound form