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High-temperature-resistant reproducible carbon-based solid acid catalyst and preparation method thereof

A technology of solid acid catalyst and carbon-based solid acid, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc. Biodiesel industrial production and other issues, to achieve the effect of high degree of combination, stable product structure, excellent thermal stability characteristics

Active Publication Date: 2014-09-10
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of the currently developed carbon-based solid acid catalysts require pre-activated process steps and necessary factors such as nitrogen protection. Some carbon-based catalysts prepared from raw materials such as starch or glucose, carbonization and sulfonation The cycle is long, which increases the production cost, which is not conducive to the industrial production of biodiesel

Method used

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  • High-temperature-resistant reproducible carbon-based solid acid catalyst and preparation method thereof
  • High-temperature-resistant reproducible carbon-based solid acid catalyst and preparation method thereof
  • High-temperature-resistant reproducible carbon-based solid acid catalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] (1) Take fresh sweet potatoes, wash them, remove sediment impurities, slice them (thickness 1mm), and dry them in a blast drying oven at 75°C for 2 hours to obtain dried sweet potatoes;

[0025] (2) Transfer the dried sweet potato obtained in step (1) to a muffle furnace at 400°C for 25 minutes at high temperature, and then grind the carbonized black lumps into granular substances with a mortar to obtain a carbonized sample;

[0026] (3) Add concentrated sulfuric acid with a concentration of 98% to the carbonized sample obtained in step (2) according to the ratio of solid powder to concentrated sulfuric acid of 1g:10ml (w / v), and carry out sulfonation reaction under the condition of constant mechanical stirring , the stirring speed is 800rpm, the water bath is heated, the temperature is controlled at 100°C, the reaction time is 3h, and the sulfonated sample is obtained;

[0027] (4) Filter the sulfonated sample obtained in step (3), collect the solid sample, and wash it...

Embodiment 2

[0030] (1) Wash fresh taro, remove sediment impurities, slice (thickness 10mm), and dry in a hot air drying oven at 40°C for 4 hours to obtain dried taro;

[0031] (2) Dry transfer the taro obtained in step (1) to a muffle furnace at 200°C for 2.5 hours at high temperature, and then grind the carbonized black lumps into granular substances with a mortar to obtain carbonized samples;

[0032] (3) Add concentrated sulfuric acid with a concentration of 80% to the carbonized sample obtained in step (2) according to the ratio of solid powder to concentrated sulfuric acid of 1g:15ml (w / v), and carry out sulfonation reaction under the condition of continuous magnetic stirring , the stirring speed is 100rpm, the water bath is heated, the temperature is controlled at 200°C, the reaction time is 0.5h, and the sulfonated sample is obtained;

[0033] (4) Centrifuge the sulfonated sample obtained in step (3) at a centrifugation speed of 12000rpm, collect the solid sample, and wash it conti...

Embodiment 3

[0036] (1) Take fresh yam, wash it, remove sediment impurities, slice it (thickness 20mm), and dry it in a vacuum drying oven at 120°C for 0.5h to obtain dried yam;

[0037] (2) Dry transfer the yam obtained in step (1) to a muffle furnace at 450°C for 15 minutes at high temperature, and then grind the carbonized black lumps into granular substances with a mortar to obtain a carbonized sample;

[0038] (3) Add concentrated sulfuric acid to the carbonized sample obtained in step (2) according to the ratio of solid powder to 70% concentrated sulfuric acid at a ratio of 1g:20ml (w / v), and carry out sulfonation reaction under the condition of continuous rotation and stirring , the stirring speed is 1800rpm, the water bath is heated, the temperature is controlled at 70°C, the reaction time is 5h, and the sulfonated sample is obtained;

[0039] (4) Centrifuge the sulfonated sample obtained in step (3) at a speed of 3000rpm to collect the solid sample and wash it with clean water unt...

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Abstract

The invention discloses a high-temperature-resistant reproducible carbon-based solid acid catalyst and a preparation method thereof. The preparation method comprises the following steps: after slicing, drying and pretreating potatoes, performing high-temperature short-time firing and carbonizing, then performing sulfonation with concentrated sulfuric acid, filtering, cleaning, and drying to obtain the final product. The preparation method is simple and convenient, and is low in cost; the catalyst is high in catalysis activity, is high-temperature-resistant, is reproducible, and can be repeatedly utilized. The industrialized production of biodiesel is greatly promoted, and extremely high economic benefit and social benefit are achieved.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a method for preparing a high-temperature-resistant regenerated carbon-based solid acid catalyst. Background technique [0002] The outbreak of the two oil crises made the energy issue the focus of attention. The dwindling oil resources lead to energy shortages and soaring oil prices, forcing people to pay more and more attention to alternatives to petroleum fuels. In recent years, the research on the preparation of biodiesel has enabled the realization of renewable petroleum diesel energy, but the problem of high cost of industrial production of biodiesel still needs to be solved, which seriously limits the application and promotion of biodiesel. [0003] The preparation of biodiesel is usually realized through the transesterification reaction between long-chain fatty acids and low-carbon alcohols, in which the type and use of catalysts have a profound impact on the rate and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J31/40B01J27/02B01J27/30B01J35/10
Inventor 陈海英崔政伟邵艺陈榆中
Owner JIANGNAN UNIV
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