Abstract: The present invention relates to a process for hydroxylation of a compound of formula (I) by reacting the compound of formula (I) with an oxidizing agent, in the presence of a titanium silicalite zeolite prepared by crystallization preceded by a maturing step. The present invention also relates to a titanium silicalite zeolite and to the process for preparing same.

Abstract: The present invention relates to a process for hydroxylation of a compound of formula (I) by reacting the compound of formula (I) with an oxidizing agent, in the presence of a titanium silicalite zeolite prepared by crystallization preceded by a maturing step. The present invention also relates to a titanium silicalite zeolite and to the process for preparing same.

Abstract: The present invention relates to a process for hydroxylation of a compound of formula (I) by reacting the compound of formula (I) with an oxidizing agent, in the presence of a titanium silicalite zeolite prepared by crystallization preceded by a maturing step. The present invention also relates to a titanium silicalite zeolite and to the process for preparing same.

Abstract: The present invention concerns a process to carry out an ester hydrolysis wherein the ester compound (c) is made from at least an alcohol (a) and a carboxylic acid (b), and wherein said alcohol (a) and said carboxylic acid (b) are forming a biphasic liquid system when mixed together; comprising at least a step of producing an ester compound (c)/water emulsion by using as stabilizing species amphiphilic solid particles of nanometric dimension and optionally a catalyst X.

Abstract: The present invention concerns a process to carry out an ester hydrolysis wherein the ester compound (c) is made from at least an alcohol (a) and a carboxylic acid (b), and wherein said alcohol (a) and said carboxylic acid (b) are forming a biphasic liquid system when mixed together; comprising at least a step of producing an ester compound (c)/water emulsion by using as stabilizing species amphiphilic solid particles of nanometric dimension and optionally a catalyst X.

Abstract: The present invention relates to a process for hydroxylation of a compound of formula (I) by reacting the compound of formula (I) with an oxidizing agent, in the presence of a titanium silicalite zeolite prepared by crystallization preceded by a maturing step. The present invention also relates to a titanium silicalite zeolite and to the process for preparing same.

Abstract: The invention relates to a method of preparing a partially silylated silica having at a surface thereof hydrophilic sites defined by non-silylated hydroxyl groups. The method of the invention comprises the steps of (a) providing a micelle templated silica having at a surface thereof surfactant-protected hydroxyl groups and unprotected hydroxyl groups; (b) treating the micelle templated silica with a base-generating silylating agent to silylate the unprotected hydroxyl groups and thereby obtain a partially silylated micelle templated silica; and (c) treating the partially silylated micelle templated silica with an acid to displace the surfactant, thereby obtaining a partially silylated silica having at the surface thereof hydrophilic sites defined by non-silylated hydroxyl groups. Such a partially silyalated silica having hydrophilic sites is useful as a catalyst support and for ion exchange in chromatography.

Abstract: The invention relates to a process for producing mesostructured metal or non-metal oxides. The process is essentially characterized in that it consists in: (a) mixing in a liquid reaction medium a surfactant and a metal or non-metal oxide at temperature enabling the surfactant to be dissolved in the reaction medium, the surfactant/metal or non-metal oxide molar ratio being less than 1; (b) heating the reaction medium at a temperature sufficiently high and for a sufficient period of time to permit structural reorganization of the metal or non-metal oxide and to obtain a mesostructured metal or non-metal oxide; and (c) effecting a liquid-solid separation of the reaction medium to recover the mesostructured metal or non-metal oxide. The use of a surfactant/metal or non-metal oxide molar ratio less than 1 enables to avoid froth or bubble formation which greatly hinders any subsequent leaching.

Abstract: The invention relates to a method of treating a liquid gallium or gallium alloy surface for prolonged use as a liquid mirror. The method of the invention comprises the steps of (a) contacting the surface of liquid gallium or gallium alloy with an aqueous solution of a halogenic acid to cause dissolution of any gallium oxide present on the surface, thereby obtaining an oxide-free liquid gallium or gallium alloy surface covered with a layer of the acid solution; (b) adding to the acid solution an aqueous solution of a surfactant present in an amount to form a single bimolecular layer of surfactant at an interface between the liquid gallium or gallium alloy and water; and (c) allowing a uniform passivating oxide layer to gradually form on the oxide-free liquid gallium or gallium alloy surface, the passivating oxide layer having surface irregularities smaller than 40 nm.

Abstract: The invention relates to a method of treating a liquid gallium or gallium alloy surface for prolonged use as a liquid mirror. The method of the invention comprises the steps of (a) contacting the surface of liquid gallium or gallium alloy with an aqueous solution of a halogenic acid to cause dissolution of any gallium oxide present on the surface, thereby obtaining an oxide-free liquid gallium or gallium alloy surface covered with a layer of the acid solution; (b) adding to the acid solution an aqueous solution of a surfactant present in an amount to form a single bimolecular layer of surfactant at an interface between the liquid gallium or gallium alloy and water; and (c) allowing a uniform passivating oxide layer to gradually form on the oxide-free liquid gallium or gallium alloy surface, the passivating oxide layer having surface irregularities smaller than 40 nm.