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Multivariate catalyst for hydrogenation of edible oils and its preparation method

An edible oil and catalyst technology, which is applied in the directions of catalyst carrier, fatty acid hydrogenation, chemical instruments and methods, etc., can solve the problems of affecting the stability of hydrogenated oil, troublesome post-processing process, long hydrogenation reaction time, etc., so as to eliminate the need for molding Stages, components are evenly distributed, and the effect of saving dosage

Inactive Publication Date: 2009-11-04
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalysts commonly used in production currently have relatively large defects: nickel-based catalysts are carcinogenic to the human body; copper-based catalysts will produce trans-acids during hydrogenation, and eating a large amount of foods containing high-trans-acids will increase The probability of coronary heart disease, and Cu is an oxygen promoter for oil oxidation, the residual amount of one part per million will affect the stability of hydrogenated oil, which will make the post-treatment process of Cu as a hydrogenation catalyst more troublesome
Liao Shijun and others have developed a Ni-Fe two-component oil hydrogenation catalyst with silica gel as the carrier, but the hydrogenation reaction time is too long, it takes 6 hours, and the above catalysts cannot leave the carcinogenic Ni or easily generate trans acid Cu as the active component

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 100ml concentration of Pt(NO 3 ) 2 solution, 65ml of Pd(NO 3 ) 2 solution, 30ml of Fe(NO 3 ) 3 solution, 5ml of La(NO 3 ) 3 The solution is mixed and heated to 80°C, and 1mol / L Na 2 CO 3 Solution, under the continuous stirring of the agitator, is continuously added dropwise to the metal salt mixed solution until the pH value is 8-9, then heated to 95°C, and kept for 1 hour; after cooling, add 20g of purified attapulgite Soil and 5 grams of diatomaceous earth, stirred for 10 minutes, centrifugally filtered, washed with distilled water for 3 times, dried at 105°C, and ground to obtain the intermediate; the intermediate was reacted with excess formic acid for 3 hours to convert it into formate Suction filtration, drying at 105°C, and grinding to 80-100 mesh to obtain the catalyst.

[0019] Take 2 grams of the prepared catalyst and put it into a WDF-1 high-pressure reaction kettle, replace the air in the kettle with nitrogen, then raise the temperature to 300°...

Embodiment 2

[0021] Exchanging the Pt(NO in Example 1 3 ) 2and Pd(NO 3 ) 2 Volume consumption, other conditions remain unchanged, the melting point of edible oil after hydrogenation is 47.5°C measured by a micro melting point analyzer, it can be seen that the catalytic activity of Pd is slightly higher than that of Pt, but the price is expensive, and the introduction of Pt is to reduce the price of the catalyst. The catalytic activity of oil hydrogenation increases with the increase of Pd, but after the content of Pd increases to a certain extent, the increase of hydrogenation activity slows down, so the ratio of Pt and Pd in ​​Example 1 is more appropriate.

Embodiment 3

[0023] Except without adding Fe(NO 3 ) 3 Solution, all the other are the same as in Example 1. When the reaction finishes, the edible oil melting point after the hydrogenation is determined to be 45.6° C. The addition of Fe can promote the effective dispersion of Pd and Pt and improve the catalytic activity.

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Abstract

The invention discloses a catalyst for multiple hydrogenation of edible oils and fats and a preparation method thereof. The catalytic active components are Pt, Pd, Fe and La, and the catalytic active components are loaded on a composite carrier in the form of metal salts and finally reduced by co-precipitation. Prepared, the composite carrier is attapulgite and diatomite, the loading capacity of the catalytic active component per 100g of the composite carrier is 0.2-0.8mol; the molar ratio of the catalytic active component is Pt40-59.5%, Pd 30-35%, Fe 10-20%, La 0.5-5%; wherein the mass ratio of attapulgite to diatomite is 4-5:1; based on the edible oil volume of 100ml, the catalyst dosage is 0.5-3g. The catalyst and its preparation method of the present invention do away with carcinogenic Ni and Cu which are prone to trans-acid generation. The catalyst is simple in process, stable in performance, reusable, and has broad application prospects today when people pay more and more attention to dietary health.

Description

technical field [0001] The invention relates to a catalyst for multiple hydrogenation of edible oils and fats and a preparation method thereof. Background technique [0002] Hydrogenation of edible fats and oils Hydrogenation refers to the process of reacting hydrogen with unsaturated fatty acids in fats and oils under the action of a catalyst to saturate their double bonds to obtain special edible oil products. The main purpose of hydrogenation is to reduce the Increase the unsaturation, improve the melting point, increase the content of solid fat, improve the stability of edible oil to oxygen and heat, and improve the color, fragrance and taste of edible oil. [0003] The speed of the hydrogenation reaction depends on factors such as reaction temperature, pressure, and catalyst activity. The function of the catalyst is to change the mechanism of oil hydrogenation, reduce the activation energy of hydrogenation reaction, and accelerate the rate of hydrogenation reaction. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J32/00C11C3/12
Inventor 胡涛金叶玲陈静钱运华
Owner HUAIYIN INSTITUTE OF TECHNOLOGY