Preparation method of magnetic fat hydrogenation catalyst

Abstract

The invention provides a preparation method of a magnetic fat hydrogenation catalyst. The preparation method is characterized in that the catalyst adopts magnetic compound oxide SiO2 / Fe3O4 as a carrier and nickel as an active constituent and comprises 5 to 40 weight percent of nickel, 20 to 60 weight percent of SiO2, 10 to 40 weight percent of Fe3O4 and the balance of stearic acid; during the preparation process of the catalyst, magnetic powdered ferroferric oxide is injected and is coated with silicon dioxide, and the magnetic fat hydrogenation catalyst is prepared through a method of precipitation. The nickel serving as the active constituent is magnetic and is bonded with the carrier relatively firmly, so that the possibility of the phenomena of chalking and disappearance of the catalyst during a reaction process can be lowered, and the quality of a hydrogenization product can be improved. Besides, the catalyst has the advantage that the reclaiming and utilization ratio of the catalyst can be improved through reclaiming of an additional magnetic field, so that the manufacturing cost of a fat processing enterprise can be reduced.

Description

technical field [0001] The invention relates to the technical field of oil hydrogenation catalysis, in particular to a preparation method of a magnetic oil hydrogenation catalyst. More specifically, the composite oxide SiO 2 / Fe 3 o 4 As a magnetic carrier, a preparation method of a catalyst loaded with active Ni by a co-precipitation method, and an application technology of the catalyst in oil hydrogenation reaction. Background technique [0002] Oil hydrogenation is the process of partially or completely hydrogenating the double bonds of unsaturated animal and vegetable oils through a catalyst. Stability. For edible oil, hydrogenation can also improve the color, aroma and flavor of the oil. The oil hydrogenation catalyst is a typical powder catalyst, and the loss and deactivation of the catalyst are serious during the reaction process. The loss of the catalyst during the reaction will cause some heavy metal components to be mixed into the hydrogenation product, which ...

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Problems solved by technology

The loss of the catalyst during the reaction will cause some heavy metal components to be mixed into the hydrogenation product, which will seriously pollute the hydrogenated oil and affect the quality of the hydrogenated oil

In addition, the loss of the catalyst is also likely to cause an increase in production costs.

[0003] The research on magnetic catalysts is mostly in the field of photocatalysis, and the magnetic catalysts applied to oil hydrogenation reaction have not been reported so far.

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