Disclosed is catalyst preparation method for liquid phase hydrogenation of acetophenone in preparation of α-phenylethanol. The method includes adding water, small alcohol, Gemini surfactant and organic pore-forming agent to reactor. Then adding silica sol and stirring to prepare aqueous dispersion of silica sol; preparing alkaline precipitant and mixed solution containing salts of copper containing compound, zinc containing compound, rare-earth metal containing compound and alkaline-earth metal containing compound, adding alkaline precipitant and mixed solution together to aqueous dispersion, followed by precipitation, ageing, filtration, washing, drying, calcination and molding to obtain catalyst. By using silica sol and silicate as composite silicon source, adding organic pore-forming agent before precipitation process, modifying catalyst by Zn, rare-earth metal and alkaline earth metal, when using liquid phase hydrogenation of acetophenone to prepare α-phenylethanol, catalyst has high activity and good selectivity, and effectively improves the catalyst's liquid resistance, has high strength and good stability.

Method for treating production wastewater from the preparation of propylene oxide by co-oxidation. The wastewater includes a first portion of wastewater having a peroxide content of 2000 mg/L or more and a second portion of wastewater having a peroxide content of 50 mg/L or less.

Method for treating production wastewater from the preparation of propylene oxide by co-oxidation. The wastewater includes a first portion of wastewater having a peroxide content of 2000 mg/L or more and a second portion of wastewater having a peroxide content of 50 mg/L or less.

The invention relates to monocarbonyl complexes of ruthenium and osmium with bi- and tridentate nitrogen and phosphine ligands. The invention relates to methods for preparing these complexes and the use of these complexes, isolated or prepared in situ, as catalysts for reduction reactions of ketones and aldehydes both via transfer hydrogenation or hydrogenation with hydrogen.

The invention relates to monocarbonyl complexes of ruthenium and osmium with bi- and tridentate nitrogen and phosphine ligands. The invention relates to methods for preparing these complexes and the use of these complexes, isolated or prepared in situ, as catalysts for reduction reactions of ketones and aldehydes both via transfer hydrogenation or hydrogenation with hydrogen.

The present invention relates to a transition metal complex having a PNNP4 ligand, which is easy to manufacture and handle and is relatively inexpensively available, and a method for manufacturing the same, as well as a method using this transition metal complex as a catalyst for hydrogenation reduction of ketones, esters and amides to manufacture corresponding alcohols, aldehydes, hemiacetals and hemiaminals, a method using this transition metal complex as a catalyst for oxidation of alcohols, hemiacetals and hemiaminals to manufacture corresponding carbonyl compounds, and a method using this transition metal complex as a catalyst for dehydrogenation condensation between alcohols and amines to manufacture alkylamines.

The present invention relates to a transition metal complex having a PNNP4 ligand, which is easy to manufacture and handle and is relatively inexpensively available, and a method for manufacturing the same, as well as a method using this transition metal complex as a catalyst for hydrogenation reduction of ketones, esters and amides to manufacture corresponding alcohols, aldehydes, hemiacetals and hemiaminals, a method using this transition metal complex as a catalyst for oxidation of alcohols, hemiacetals and hemiaminals to manufacture corresponding carbonyl compounds, and a method using this transition metal complex as a catalyst for dehydrogenation condensation between alcohols and amines to manufacture alkylamines.

The present invention is directed to a process for hydrogenation of an ester-containing substrate, comprising treating an ester-containing substrate with a base and a transition metal catalyst in the presence of molecular hydrogen, wherein the base is present in at least 30 mol % based upon the total amount of ester-containing substrate and wherein the substrate/catalyst loading is greater than or equal to 10,000/1.

The present invention is directed to a process for hydrogenation of an ester-containing substrate, comprising treating an ester-containing substrate with a base and a transition metal catalyst in the presence of molecular hydrogen, wherein the base is present in at least 30 mol % based upon the total amount of ester-containing substrate and wherein the substrate/catalyst loading is greater than or equal to 10,000/1.

The invention relates to monocarbonyl complexes of ruthenium and osmium with bi- and tridentate nitrogen and phosphine ligands. The invention relates to methods for preparing these complexes and the use of these complexes, isolated or prepared in situ, as catalysts for reduction reactions of ketones and aldehydes both via transfer hydrogenation or hydrogenation with hydrogen.