Quaternary amorphous alloy, its preparation method and application

Abstract

This invention provides a quaternary amorphous alloy (M1-M2-N1-N2) and a method for preparing it and its application in hydrogenation of liquid maltose. Its bulk phase comprises two metals and two metalloids, and it is spherical particle with 5-100nm grain size. The method for preparation of it is as follows: mixing fully a metal salt solution and a reducer solution; adding slowly another reducer solution for reduction; centrifugalizing the black solid obtained from the reaction, washing it with deionized water until it becomes neutral to get M1-M2-N1-N2. It can be used as catalysts for hydrogenation of unsaturated function group compounds, the performance of hydrogenation of liquid maltose to produce maltose alcohol is better than that of binary and alloy amorphous alloy obtained with general reduction, and is much better than that of Raney Ni skeleton catalyst generally used in hydrogenation of liquid maltose.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a quaternary amorphous alloy and a preparation method thereof, and its application in liquid-phase maltose hydrogenation shows excellent hydrogenation performance. technical background [0002] In industry, maltitol is mainly produced by hydrogenation of maltose in liquid phase. Foreign enterprises producing maltitol are mainly concentrated in Europe, the United States and Japan, and all use the skeleton Raney Ni as the catalyst, but there are mainly the following defects: (1) Raney Ni catalyst Alkaline filtration is required during the preparation process, resulting in serious environmental pollution; (2) Raney Ni catalysts have poor mechanical strength and are prone to crushing during use, which not only leads to catalyst deactivation, but also fragments can block the reactor. At the same time, some Ni (3) Raney Ni catalyzed hydrogenation of maltose generally needs to b...

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Problems solved by technology

[0002] In industry, maltitol is mainly produced by hydrogenation of maltose in liquid phase. Foreign enterprises producing maltitol are mainly concentrated in Europe, the United States and Japan, and all use the skeleton Raney Ni as the catalyst, but there are mainly the following defects: (1) Raney Ni catalyst Alkaline filtration is required during the preparation process, resulting in serious environmental pollution; (2) Raney Ni catalysts have poor mechanical strength and are prone to crushing during use, which not only leads to catalyst deactivation, but also fragments can block the reactor. At the same time, some Ni (3) Raney Ni catalyzed hydrogenation of maltose generally needs to be carried out at 100-150°C and 4.0-8.0MPa. Since maltose is formed by condensation of two glucose molecules, high temperature and high pressure will It leads to the transformation of disaccharides into monosaccharides and produces by-products, often resulting in a mixture of polysaccharide alcohols. The content of maltitol is generally about 70%, which affects the purity of maltitol products

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