48 results about "Para nitrophenol" patented technology

The invention discloses a hydrothermal preparation method of a carbon-based catalyst used for the catalytic hydrogenation of paranitrophenol. The hydrothermal preparation method is characterized in that: taking microcrystalline cellulose as a raw material and different non-noble metal compounds as a doping source, conducting high-temperature high-pressure hydrothermal treatment, filtering to obtain a deep brown solid product, respectively washing with deionized water and absolute ethyl alcohol for a plurality of times to remove an organic matter on the surface of the product, drying, and grinding. An obtained catalyst precursor is put into a tubular calcinatory, and is calcined under the nitrogen atmosphere at the high temperature for a certain period of time to obtain the metal doped carbon-based catalyst with excellent stability. The catalytic efficiency of the carbon-based catalyst on generation of aminophenol through catalytic hydrogenation of the paranitrophenol is explored in a normal-temperature normal-pressure reaction system. The operation process has the main characteristics that: the cellulose, a biomass resource, is utilized, the operation process is environment-friendly and cheap and is easy to get, the catalytic activity of the non-noble metals is neutral, the reaction conditions are mild, an active center and a carbon material are synchronously generated, so that the structure is more stable, the catalytic reaction is conducted under the conditions of normal pressure and normal temperature, and the reaction process is simple to operate.