Preparation method and application of grain stillage-loaded heterogeneous catalyst

Abstract

The invention mainly aims at providing a preparation method and application of a grain stillage-loaded heterogeneous catalyst. The method comprises the following steps of (1) putting 10-50g of dry grain stillage into 300-1000mL of 1-10% acid solution for soaking for 1-8h, filtering and washing until neutral, drying and burning the dried grain stillage at 400-650 DEG C to obtain silicon dioxide; and (2) soaking the silicon dioxide into 10-50% Fe<3+> ion solution, stirring in a water bath at 60-95 DEG C for 1-4h, carrying out solid-liquid separation to obtain a solid and drying the solid to obtain the grain stillage-loaded heterogeneous catalyst. The Fe<3+> ion solution is taken as an iron source, the grain stillage is effectively utilized as a base material and the heterogeneous catalyst is loaded, so that the prepared catalyst is high in catalysis efficiency, no secondary pollution is generated and the catalyst can be repeatedly used for multiple times.

Description

technical field

[0001] The invention belongs to the field of catalyst preparation, in particular to a preparation method and application of distiller's grains loaded heterogeneous catalyst. Background technique

[0002] my country is a big country in the production and consumption of liquor, and a huge amount of distiller's grains, a by-product of brewing raw materials, are produced during the production of liquor. Because distiller's grains contain a large amount of organic matter, such as starch, cellulose, and organic acids, discarding distiller's grains as waste not only wastes resources, but also causes serious environmental pollution pressure. At present, the main utilization methods of domestic distiller's grains include: for the reproduction of raw wine, for the production of glycerin, for the cultivation of edible fungi, for the recovery of methane through fermentation, for the production of feed protein, and so on. However, in these treatment methods, except for t...

Examples

preparation example Construction

[0024] The preparation method of distiller's grains supported heterogeneous catalyst of the embodiment of the present invention, described method comprises the following steps:

[0025] (1) Soak every 10-50g of dried distiller's grains in 300-1000mL acid solution with a concentration of 1-10% for 1-8h, filter, wash until neutral, and dry; calcined to obtain silicon dioxide;

[0026] (2) immersing the silicon dioxide in a concentration of 10-50% Fe 3+ Stirring in a water bath at 60-100° C. for 1-4 h in the ion solution, separating the solid from the liquid to obtain a solid, and drying the solid to obtain the heterogeneous catalyst supported on distillers grains.

[0027] The distiller's grain raw material in the embodiment of the present invention is calcined under specific conditions to obtain amorphous silica with high purity and high specific surface area, which generally does not contain harmful heavy metal ions such as lead and arsenic.

[0028] Heterogeneous catalyst m...

Embodiment 1

[0035] After the distiller's grains were washed with water for 3 times and dried, 20 g of dried distiller's grains were taken, soaked in 500 mL of 3% dilute hydrochloric acid solution for 2 hours, filtered, washed with deionized water until neutral, and dried for 10 hours. The processed distiller's grains were placed in a muffle furnace and calcined at 400°C for 20 minutes to obtain a silica product. Then immerse the silicon dioxide product in 10% ferric nitrate solution, bathe in water at 60° C. for 1 hour, filter with suction, and dry for 12 hours to obtain distiller’s grains-loaded heterogeneous catalyst.

Embodiment 2

[0037] After the distiller's grains were washed 4 times with water and dried, 30 g of dried distiller's grains were taken, soaked in 500 mL of 5% dilute hydrochloric acid solution for 4 hours, filtered, washed with deionized water until neutral, and dried for 12 hours. The processed distiller's grains were placed in a muffle furnace and calcined at 500° C. for 40 minutes to obtain a silica product. Then immerse the silicon dioxide product in 20% ferric nitrate solution, put it in a water bath at 70°C for 2 hours, filter it with suction, and dry it for 18 hours to obtain a heterogeneous catalyst supported by distiller's grains. figure 1 It is the infrared spectrogram before and after iron loading of the distiller's grains loaded heterogeneous catalyst obtained in Example 2 of the present invention.

technical field

[0001] The invention belongs to the field of catalyst preparation, in particular to a preparation method and application of distiller's grains loaded heterogeneous catalyst. Background technique

[0002] my country is a big country in the production and consumption of liquor, and a huge amount of distiller's grains, a by-product of brewing raw materials, are produced during the production of liquor. Because distiller's grains contain a large amount of organic matter, such as starch, cellulose, and organic acids, discarding distiller's grains as waste not only wastes resources, but also causes serious environmental pollution pressure. At present, the main utilization methods of domestic distiller's grains include: for the reproduction of raw wine, for the production of glycerin, for the cultivation of edible fungi, for the recovery of methane through fermentation, for the production of feed protein, and so on. However, in these treatment methods, except for t...

Examples

preparation example Construction

[0024] The preparation method of distiller's grains supported heterogeneous catalyst of the embodiment of the present invention, described method comprises the following steps:

[0025] (1) Soak every 10-50g of dried distiller's grains in 300-1000mL acid solution with a concentration of 1-10% for 1-8h, filter, wash until neutral, and dry; calcined to obtain silicon dioxide;

[0026] (2) immersing the silicon dioxide in a concentration of 10-50% Fe 3+ Stirring in a water bath at 60-100° C. for 1-4 h in the ion solution, separating the solid from the liquid to obtain a solid, and drying the solid to obtain the heterogeneous catalyst supported on distillers grains.

[0027] The distiller's grain raw material in the embodiment of the present invention is calcined under specific conditions to obtain amorphous silica with high purity and high specific surface area, which generally does not contain harmful heavy metal ions such as lead and arsenic.

[0028] Heterogeneous catalyst m...

Embodiment 1

[0035] After the distiller's grains were washed with water for 3 times and dried, 20 g of dried distiller's grains were taken, soaked in 500 mL of 3% dilute hydrochloric acid solution for 2 hours, filtered, washed with deionized water until neutral, and dried for 10 hours. The processed distiller's grains were placed in a muffle furnace and calcined at 400°C for 20 minutes to obtain a silica product. Then immerse the silicon dioxide product in 10% ferric nitrate solution, bathe in water at 60° C. for 1 hour, filter with suction, and dry for 12 hours to obtain distiller’s grains-loaded heterogeneous catalyst.

Embodiment 2

[0037] After the distiller's grains were washed 4 times with water and dried, 30 g of dried distiller's grains were taken, soaked in 500 mL of 5% dilute hydrochloric acid solution for 4 hours, filtered, washed with deionized water until neutral, and dried for 12 hours. The processed distiller's grains were placed in a muffle furnace and calcined at 500° C. for 40 minutes to obtain a silica product. Then immerse the silicon dioxide product in 20% ferric nitrate solution, put it in a water bath at 70°C for 2 hours, filter it with suction, and dry it for 18 hours to obtain a heterogeneous catalyst supported by distiller's grains. figure 1 It is the infrared spectrogram before and after iron loading of the distiller's grains loaded heterogeneous catalyst obtained in Example 2 of the present invention.

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