A kind of hydrothermal preparation method of supported nickel phosphide catalyst

Abstract

The invention relates to a hydrothermal preparation method of a loaded nickel phosphide catalyst, which comprises red phosphorus, nickel chloride and a carrier according to the molar ratio P:Ni=15-30, and the loading amount of nickel phosphide is 30-50%. Add water and mix evenly, then add strong alkali solution to adjust the pH value to 9-14, then quickly pour it into the reaction kettle, keep it at 150-300°C for 2-24 hours, stop the heat preservation, let it cool down to room temperature, then filter the resulting suspension, wash the filter cake several times and transfer it to a vacuum drying oven, and dry it under vacuum conditions to obtain a supported nickel phosphide catalyst; this method avoids expensive The introduction of solvents and other additives and highly toxic, flammable and explosive reactants shortens the production cycle, reduces the temperature of catalyst preparation, saves costs, and improves the performance of catalyst products and the speed and safety of production.

Description

technical field [0001] The invention relates to a treatment technology of a supported nickel phosphide catalyst, in particular to a preparation method of a supported nickel phosphide catalyst under hydrothermal conditions. Background technique [0002] At present, transition metal phosphides are gradually becoming a new generation of hydrogenation catalytic materials due to their high desulfurization activity and good resistance to carbon deposition and poisoning. especially Ni 2 P catalyst not only has high activity and low price, but also has good stability, which overcomes the Achilles' heel of low stability of traditional catalysts. There are many preparation methods of nickel phosphide at present, the main synthesis methods are: (1) direct combination of metal nickel and red phosphorus under high temperature and protective atmosphere; (2) solid replacement reaction of nickel halide and phosphorus; (3) nickel halide and red phosphorus Reaction of phosphine; (4) Decompo...

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Problems solved by technology

At present, most of the research on preparing supported nickel phosphide catalysts by hydrothermal method focuses on solvothermal methods, adding dispersants and surfactants, etc., but the research on preparing supported nickel phosphide catalysts by directly using hydrothermal methods There are few reports outside

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