A production method for a cyclohexanedicarboxylic acid compound, having a step of obtaining a cyclohexanedicarboxylic acid compound or an aqueous ammonia solution of a cyclohexanedicarboxylic acid compound by bringing a phthalic acid compound in an aqueous ammonia solution into contact with hydrogen in the presence of a fixed bed catalyst in a reactor.

The present invention provides the use of a metformin salt, particularly metformin monothreonate, in the preparation of a medicament for treating cerebral infarction. The metaformin monothreonate of the present invention has an excellent effect in the treatment of cerebral infarction. The present invention also provides a method for preparing metformin monothreonate and a composition comprising metformin monothreonate.

A process, a system, and an apparatus are provided for converting a lower alkane to an alkene. Oxygen and the lower alkane are provided to an ODH reactor to convert at least a portion of the lower alkane to an alkene. An ODH stream comprising the alkene, an oxygenate, steam, and a carbon-based oxide is produced. The bulk of the oxygenate is removed from the ODH outlet stream by non-dilutive cooling, with residual oxygenate being removed using dilutive quenching with a carbonate. Subsequently, separation of the carbon-based oxide from the alkene is achieved using a caustic tower, which also produces spent caustic in the form of a carbonate, which is then used as the carbonate for dilutive quenching. Dilutive quenching using a carbonate allows conversion of the oxygenate to an acetate, which can then be used to simplify separation of the oxygenate from water.

A process, a system, and an apparatus are provided for converting a lower alkane to an alkene. Oxygen and the lower alkane are provided to an ODH reactor to convert at least a portion of the lower alkane to an alkene. An ODH stream comprising the alkene, an oxygenate, steam, and a carbon-based oxide is produced. The bulk of the oxygenate is removed from the ODH outlet stream by non-dilutive cooling, with residual oxygenate being removed using dilutive quenching with a carbonate. Subsequently, separation of the carbon-based oxide from the alkene is achieved using a caustic tower, which also produces spent caustic in the form of a carbonate, which is then used as the carbonate for dilutive quenching. Dilutive quenching using a carbonate allows conversion of the oxygenate to an acetate, which can then be used to simplify separation of the oxygenate from water.

Disclosed is a method for preparing compound S-1, from compound S-5; wherein compound S-5 is prepared by treating compound 2 with a tertiary amine and a hydrogen source in the presence of a chiral complex.

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Disclosed is a method for preparing compound S-1, from compound S-5; wherein compound S-5 is prepared by treating compound 2 with a tertiary amine and a hydrogen source in the presence of a chiral complex.

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A glycolic acid salt that can be a raw material (intermediate product) for producing glycolic acid is more efficiently produced by a simple process. A method for producing a glycolic acid salt includes step (1) of reacting at least one compound selected from the group consisting of glycolonitrile and glycolamide with water in the presence of a metal oxide containing 50% by mass or more of at least one element selected from the group consisting of a rare earth element, a group 4 element of the periodic table, and a group 12 element of the periodic table, and a base to obtain a glycolic acid salt.

A glycolic acid salt that can be a raw material (intermediate product) for producing glycolic acid is more efficiently produced by a simple process. A method for producing a glycolic acid salt includes step (1) of reacting at least one compound selected from the group consisting of glycolonitrile and glycolamide with water in the presence of a metal oxide containing 50% by mass or more of at least one element selected from the group consisting of a rare earth element, a group 4 element of the periodic table, and a group 12 element of the periodic table, and a base to obtain a glycolic acid salt.

A metal coordination polymer, in particular, a layered metal coordination polymer, can be used as a precursor to form nanostructures of various morphologies and composition. Metal based nanostructures can be prepared from the metal coordination polymers. The nanostructures may have various catalytic properties. The layered metal coordination polymer includes two or more layers, each layer including metal atoms coordinated to an organic linker to form a metal coordination polymer layer.

The present invention relates to a new bio-sourced vanillin and/or ethylvanillin, containing specific impurities. The invention further relates to a process for their preparations and the use of such compounds.