Grease hydrogenation catalyst

A technology of fat hydrogenation and catalyst, which is applied in the direction of physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, fatty acid hydrogenation, etc., can solve the problem of accelerating oil and other problems, and achieve the increase of sliding melting point and the source of raw materials Rich, active metal-stabilized effects

Inactive Publication Date: 2014-03-26
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the large-scale production of hydrogenated oil in traditional industries mainly uses metal nickel and copper as catalysts. Because nickel-based catalysts are carcinogenic, copper-based catalysts will produce a large amount of trans fatty acids, and the presence of trace amounts of copper will accelerate oil oxidation and rancidity.
Moreover, the high temperature, high pressure, and catalytic conditions of the hydrogenation process will also lead to the production of a large amount of trans fatty acids (trans fatty acids). The content of trans fatty acids in different hydrogenated vegetable oils varies greatly due to different processing techniques

Method used

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  • Grease hydrogenation catalyst
  • Grease hydrogenation catalyst
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Catalyst preparation conditions:

[0026] (1) Carrier ZrO 2 Preparation of zirconyl nitrate solid into an aqueous solution, and gradually add ammonia solution (1 mol / L) until a precipitate occurs. It was centrifuged and washed until neutral. The obtained solid was dried at 110 °C, and finally baked in a muffle furnace at 550 °C for 5 h;

[0027] (2) Weigh 160000 μg of solid chloroplatinic acid hexahydrate, dissolve it in distilled water and add 3 g of zirconia carrier to make 2%Pt / ZrO 2 (The weight of the carrier is the benchmark). The actual platinum loading determined by ICP-AES was 1.79% Pt / ZrO 2 (The weight of the carrier is the benchmark);

[0028] (3) Stir the chloroplatinic acid solution and the zirconia carrier continuously at room temperature for 16 h, stir evenly and evaporate to dryness in a rotary evaporator under reduced pressure;

[0029] (4) Transfer the synthesized solid to a watch glass and dry it under vacuum at 60 °C. Then bake in a muffle furn...

Embodiment 2

[0032] Catalyst effect experiment of the present invention:

[0033] Hydrogenation process conditions: Measure 300 mL of soybean oil, weigh 150 mg of the catalyst prepared in Example 1 (to ensure that the amount of catalyst is 5%, based on the weight of the raw oil), pour them into the hydrogenation reactor together Seal it well and start preheating to 170°C. Introduce nitrogen to exhaust the air for 2-4 minutes, continue to replace nitrogen with high-purity hydrogen for 3-5 minutes, then keep the hydrogen pressure at 3 bar, start the stirring device to maintain the speed at 400 r / min, and record the hydrogenation time at this time as 0 h. Afterwards, samples were taken every 0.5 h, and the co-hydrogenation reaction was carried out for 4 h. The iodine value of the hydrogenated oil samples was determined, and each sample was analyzed by gas phase detection. figure 2 The content of trans-fatty acid when the iodine value is 70-90 is counted in , and the data shows that 1.79%Pt / ...

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Abstract

The invention provides a grease hydrogenation catalyst. Platinum is loaded on ZrO2, forming the grease hydrogenation catalyst; the actual load amount of platinum is 1.79%, and the catalyst has a specific surface area of 32.88 m<2> / g, a specific pore volume of 0.133 cm<3> / g, an average pore size of 16.16 nm and a platinum particle size of 1 + / - 0.25 nm. The catalyst is prepared by using an impregnation reduction method; a solution is prepared from chloroplatinic acid hexahydrate, the solution and a carrier undergo impregnation and stirring for a period of time, then pressure reduction distillation is carried out to remove moisture, drying is carried out, a synthesized solid is calcined and then reduced at a high temperature in hydrogen so as to prepare the catalyst. The invention has the following advantages: the catalyst is simple to prepare, raw materials are widely available, catalytic activity of hydrogenated soybean oil is high, the amount of generated trans-fatty acid is small compared with a nickel catalyst, the catalyst has good selectivity, and the quality of hydrogenated grease is good.

Description

technical field [0001] The present invention relates to a catalyst. Background technique [0002] Hydrogenation is an important modification process of oil deep processing, which can change the natural structure and triglyceride composition of oil. Since there are many cis-unsaturated fatty acids in natural vegetable oils, they are prone to oxidation and rancidity in light or air. Therefore, hydrogen is added to the unsaturated double bonds of fatty acids through hydrogenation to make natural vegetable oils rich in polyunsaturated fatty acids Transformation into hydrogenated oil mainly composed of monounsaturated fatty acids can increase the melting and boiling points of the oil, improve the oxidation stability of the oil, prolong the shelf life, enhance the plasticity, and alleviate the odor and flavor deterioration of the oil. [0003] Edible oil hydrogenation generally uses metals such as reducing nickel as catalysts to catalyze the hydrogenation process of unsaturated b...

Claims

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Application Information

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IPC IPC(8): B01J23/42C11C3/12
Inventor 谢明勇陈奕聂少平杨希
Owner NANCHANG UNIV
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