The invention pertains to a method for providing a succinic acid solution, comprising the steps ofproviding a first magnesium succinate containing medium with a magnesium succinate concentration of 18-23 wt. % to a first acidification reactor where it is contacted with hydrogen chloride to form a solution of succinic acid, magnesium chloride and hydrogen chloride,providing a second magnesium succinate containing medium with a magnesium 3 succinate concentration of 25-50 wt. %, and contacting it in a second acidification reactor with the solution of succinic acid, magnesium chloride and hydrogen chloride withdrawn from the first acidification reactor, to form an aqueous mixture comprising magnesium chloride and succinic acid with a succinic acid concentration of at least 18 wt. %. the method according to the invention makes it possible to obtain a solution comprising succinic acid and magnesium 20 chloride with an increased succinic acid concentration.

The invention pertains to a method for providing a succinic acid solution, comprising the steps ofproviding a first magnesium succinate containing medium with a magnesium succinate concentration of 18-23 wt. % to a first acidification reactor where it is contacted with hydrogen chloride to form a solution of succinic acid, magnesium chloride and hydrogen chloride,providing a second magnesium succinate containing medium with a magnesium 3 succinate concentration of 25-50 wt. %, and contacting it in a second acidification reactor with the solution of succinic acid, magnesium chloride and hydrogen chloride withdrawn from the first acidification reactor, to form an aqueous mixture comprising magnesium chloride and succinic acid with a succinic acid concentration of at least 18 wt. %. the method according to the invention makes it possible to obtain a solution comprising succinic acid and magnesium 20 chloride with an increased succinic acid concentration.

A catalyst-free synthesis method for the formation of a metalorganic compound comprising a desired (first) metal may include, for example, selecting another (second) metal and an organic solvent, with the second metal being selected to (i) be more reactive with respect to the organic solvent than the first metal and (ii) form, upon exposure of the second metal to the organic solvent, a reaction by-product that is more soluble in the organic solvent than the metalorganic compound. An alloy comprising the first metal and the second metal may be first produced (e.g., formed or otherwise obtained) and then treated with the organic solvent in a liquid phase or a vapor phase to form a mixture comprising (i) the reaction by-product comprising the second metal and (ii) the metalorganic compound comprising the first metal. The metalorganic compound may then be separated from the mixture in the form of a solid.

Provided are a method of preparing a metal oxide-silica composite aerogel which includes preparing a silicate solution by dissolving water glass at a concentration of 0.125 M to 3.0 M, after adding and mixing a metal salt solution having a metal ion concentration of 0.125 M to 3.0 M to the silicate solution, precipitating metal oxide-silica composite precipitates by adjusting a pH of a resulting mixture to be in a range of 3 to 9, and separating and drying the metal oxide-silica composite precipitates, wherein the metal salt solution includes a magnesium (Mg)-containing metal salt in an amount such that an amount of magnesium ions is greater than 50 mol % based on a total mole of metal ions in the metal salt solution, and a metal oxide-silica composite aerogel having low tap density and high specific surface area prepared by the method.

The present disclosure is directed to the scalable synthesis of novel perimorphic materials, including stratified perimorphic frameworks, on recyclable templates, and using recyclable process liquids. Using these methods, three-dimensional architectures constructed from two-dimensional molecular structures can be produced economically and with reduced waste.

The present disclosure provides a novel process for production of magnesium oxide with more excellent manageability. The present disclosure is a process for producing magnesium oxide. The process of the present disclosure comprises the following carbonation step, separating step, crystallization step and calcination step.

The carbonation step is a step in which carbon dioxide gas is blown into a magnesium compound suspension to obtain a magnesium hydrogencarbonate aqueous solution.

The separating step is a step in which the magnesium hydrogencarbonate aqueous solution is treated for solid-liquid separation.

The crystallization step is a step in which magnesium carbonate is crystallized from the aqueous solution obtained in the separating step.

The calcination step is a step in which the magnesium carbonate is calcinated in order to obtain magnesium oxide.

In the present disclosure, the crystallization step is carried out under crystallization conditions with a crystallization temperature of 50 C. or higher and lower than 80 C. The crystallization step is also carried out under crystallization conditions such that the product of the crystallization temperature and the crystallization time is 60 C..Math.h or greater and less than 210 C..Math.h.

The present disclosure provides a novel process for production of magnesium oxide with more excellent manageability. The present disclosure is a process for producing magnesium oxide. The process of the present disclosure comprises the following carbonation step, separating step, crystallization step and calcination step.

The carbonation step is a step in which carbon dioxide gas is blown into a magnesium compound suspension to obtain a magnesium hydrogencarbonate aqueous solution.

The separating step is a step in which the magnesium hydrogencarbonate aqueous solution is treated for solid-liquid separation.

The crystallization step is a step in which magnesium carbonate is crystallized from the aqueous solution obtained in the separating step.

The calcination step is a step in which the magnesium carbonate is calcinated in order to obtain magnesium oxide.

In the present disclosure, the crystallization step is carried out under crystallization conditions with a crystallization temperature of 50 C. or higher and lower than 80 C. The crystallization step is also carried out under crystallization conditions such that the product of the crystallization temperature and the crystallization time is 60 C..Math.h or greater and less than 210 C..Math.h.

The present invention relates to a method for the passivation of MgAl.sub.2O.sub.4 (Mg-spinel) powders against hydrolysis exhibiting in aqueous media by coating the surfaces with Al.sub.2O.sub.3 during the synthesis via flame pyrolysis technique. Stable aqueous suspensions with high solid loading and low viscosity can be prepared from coated powders with a core/shell structure of MgO.nAl.sub.2O.sub.3 (0.65<n<4.10)/Al.sub.2O.sub.3. Such suspensions might not only ensure production of high quality granules, but also enable production of green bodies with high density and homogeneity through wet forming methods. Accordingly, precise microstructural control can be ensured during sintering. Al.sub.2O.sub.3 shell re-dissolves within the core during sintering at variable temperatures depending on the core stoichiometry (n value). The final stoichiometry might be altered by controlling the n value of the core, the shell thickness and particle size distribution.

The present invention relates to a method for the passivation of MgAl.sub.2O.sub.4 (Mg-spinel) powders against hydrolysis exhibiting in aqueous media by coating the surfaces with Al.sub.2O.sub.3 during the synthesis via flame pyrolysis technique. Stable aqueous suspensions with high solid loading and low viscosity can be prepared from coated powders with a core/shell structure of MgO.nAl.sub.2O.sub.3 (0.65<n<4.10)/Al.sub.2O.sub.3. Such suspensions might not only ensure production of high quality granules, but also enable production of green bodies with high density and homogeneity through wet forming methods. Accordingly, precise microstructural control can be ensured during sintering. Al.sub.2O.sub.3 shell re-dissolves within the core during sintering at variable temperatures depending on the core stoichiometry (n value). The final stoichiometry might be altered by controlling the n value of the core, the shell thickness and particle size distribution.

A process and apparatus for manufacture of oxide products for use as biocide, chemical detoxifying, and catalytic support products, from caustic calcined carbonate powder, preferably from magnesite, dolomite, or hydromagnesite, is described. These oxide particles are characterized by high surface area, high porosity and a high degree of calcination, and the method of manufacture utilizes an indirectly heated counterflow reactor. The oxides may be used as a powder, granules, or formulated into a slurry and used as a spray, emulsion, foam or fog, or the powder product may be directly applied. Also described is the formation of particles with microstructures defined by at least one nano-crystalline structure positioned on the outer surface of the particles.