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Method for preparing soya bean lecithin hydrogenation catalyst

A hydrogenation catalyst, soybean lecithin technology, applied in the direction of edible phospholipid composition, food science, protein food ingredients, etc., can solve the problems of metal particle sintering, catalyst particle size and so on

Inactive Publication Date: 2010-08-11
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing method for preparing soybean lecithin hydrogenation catalyst is easy to sinter metal particles, and the obtained catalyst particle size is relatively large, and provides a preparation method of soybean lecithin hydrogenation catalyst

Method used

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Experimental program
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specific Embodiment approach 1

[0008] Specific embodiment one: the preparation method of soybean lecithin hydrogenation catalyst in the present embodiment is as follows: one, by the quality of activated carbon and the volume ratio of nitric acid solution is 1g: 10ml~25ml ratio is mixed back flow 6h~8h by activated carbon and nitric acid solution , after filtering, wash the activated carbon with deionized water until the pH value of the lotion remains unchanged, and then dry the washed activated carbon at a temperature of 90°C to 120°C and a vacuum of less than 133Pa for 4h to 6h; The treated activated carbon and water are configured into an activated carbon suspension with a concentration of 0.5g to 1.5g / ml, and then the activated carbon suspension is mixed with H 2 PdCl 4 The aqueous solution is mixed according to the volume ratio of 1:1.5~3, and then NaOH solution with a concentration of 0.05mol / L~0.2mol / L is added dropwise to adjust the pH value of the solution to 8~9, and then soaked at a temperature of...

specific Embodiment approach 2

[0013] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the quality of activated carbon in step one is mixed with the volume of nitric acid solution according to the ratio of 1g: 18ml~23ml. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0014] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the quality of activated carbon in step one is mixed with the volume of nitric acid solution according to the ratio of 1g:20ml. Others are the same as in the first embodiment.

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Abstract

The invention relates to a method for preparing a soybean lecithin hydrogenation catalyst and a method for preparing a hydrogenation catalyst. The method solves the problems that the prior method for preparing the soybean lecithin hydrogenation catalyst is easy to sinter a metal particle and the obtained catalyst has large particle diameter. The method comprises the following steps: firstly, active carbon mixed with a nitric acid solution, reflowed and dried is prepared into an aqueous solution with concentration of between 0.5 and 1.5 g / ml; secondly, the aqueous active carbon solution is mixed with an aqueous H2PdCl4 solution; a NaOH solution is used to adjust the PH value of the mixed solution; and finally, the mixed solution is added with a formaldehyde solution and is reduced and dried to obtain the soybean lecithin hydrogenation catalyst. The particle diameter of a Pd particle in the obtained soybean lecithin hydrogenation catalyst is between 3 and 5 nm; and in the process of preparing the soybean lecithin hydrogenation catalyst, no metal particle is sintered in a liquid phase.

Description

technical field [0001] The invention relates to a method for preparing a hydrogenation catalyst. Background technique [0002] Because the molecule of lecithin has strong water absorption and contains a large amount of unsaturated fatty acids, the product is easily deteriorated by light, air and temperature during storage, so it is often modified by physical, chemical or enzymatic modification. The method improves the functional properties such as stability, hydrophilicity and dispersibility of phospholipid products. The hydrogenation of soybean lecithin is a commonly used method for modifying phospholipids. It refers to the hydrogenation reaction between soybean lecithin and hydrogen under the action of a catalyst to saturate the unsaturated bonds of the fatty acid. [0003] The hydrogenation catalyst of soybean lecithin prepared at present is generally a Pd / C catalyst, and the Pd / C catalyst prepared by the gas phase reduction method needs to be reduced at high temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44C07F9/10
Inventor 张敏江连洲宋兰于殿宇任运宏
Owner NORTHEAST AGRICULTURAL UNIVERSITY