Preparation method of solid strong acid catalyst and preparation method of furfural

A solid strong acid and catalyst technology, applied in the field of chemical compounds, can solve problems such as difficult to comply with green chemistry, consume large liquid phase acid, high sulfonation temperature, etc., achieve simple preparation method, high hydrothermal stability, and low sulfonation temperature Effect

Inactive Publication Date: 2017-09-22
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the sulfonation process, a higher sulfonation temperature is required and a large amount of liquid phase acid (usually concentrated sulfuric acid, chlorosulfonic acid, etc.) is consumed, making it difficult to comply with the concept of green chemistry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The invention provides a preparation method of a solid strong acid catalyst, comprising: mixing calcium citrate porous carbon, p-aminobenzenesulfonic acid, isoamyl nitrite and water, and heating for sulfonation reaction to obtain a solid strong acid catalyst.

[0024] The present invention has no special limitation on the sources of all raw materials, which can be commercially available or self-made.

[0025] Wherein, the calcium citrate porous carbon is obtained by calcining calcium citrate at a high temperature well known to those skilled in the art, and there is no special limitation. In the present invention, it is preferably prepared according to the following method: in a protective atmosphere, citric acid Calcium is calcined at high temperature to obtain calcium citrate porous carbon. The protective atmosphere is a protective atmosphere well-known to those skilled in the art, and there is no special limitation. In the present invention, it is preferably nitrogen;...

Embodiment 1

[0039] Take 10g of calcium citrate and put it into a quartz boat, place the quartz boat in a horizontal tube furnace, install the sealing ring, pass in nitrogen gas for 30 minutes, heat up to 700°C at a heating rate of 3°C / min, and maintain the set temperature for one Hour, natural cooling, until furnace temperature is down to room temperature, stop feeding nitrogen, take out quartz boat, the dilute hydrochloric acid solution (2mol / L) that obtains black powder is immersed in 500ml, after stirring at room temperature 12h, filter and obtain black solid powder, The black solid powder was repeatedly washed with a large amount of distilled water until the filtrate was neutral, and then dried overnight at 80°C to obtain amorphous carbon, which is calcium citrate porous carbon.

[0040] Take 1g of calcium citrate porous carbon, 4g of p-aminobenzenesulfonic acid and 2g of isoamyl nitrite into a 250ml round bottom flask, then add 150ml of distilled water, heat the oil bath to 80°C, keep...

Embodiment 2

[0043] Take 1g of the calcium citrate porous carbon obtained in Example 1, 2g of p-aminobenzenesulfonic acid and 2g of isoamyl nitrite and add it to a 250ml round bottom flask, then add 150ml of distilled water, heat the oil bath to 80°C, and keep it for 13h. Carry out sulfonation, after the sulfonation is completed, filter, the obtained black solid powder is repeatedly washed with distilled water, absolute ethanol, N,N-dimethylformamide and acetone, and dried overnight at 80°C to obtain a solid strong acid catalyst.

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PUM

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Abstract

The invention provides a preparation method of a solid strong acid catalyst. The preparation method comprises the following steps of mixing calcium citrate porous carbon, sulfanilic acid, isoamyl nitrite and water; heating to perform sulfonation reaction, so as to obtain the solid strong acid catalyst. Compared with the prior art, the preparation method of the solid strong acid catalyst disclosed by the method has the advantages that the preparation method is simple, the specific surface area is large, the sulfonation temperature is low, the acid strength is high, the hydrothermal stability is high, the solid strong acid catalyst can be repeatedly used for multiple times; and the relatively high yield rate of furfural is produced at a relatively low usage amount of catalyst.

Description

technical field [0001] The invention belongs to the technical field of compounds, and in particular relates to a preparation method of a solid strong acid catalyst and a preparation method of furfural. Background technique [0002] With the massive consumption of fossil fuels and the gradual popularization of environmental awareness, the development and utilization of renewable resources has received more and more attention. Lignocellulosic biomass, as an abundant and low-cost renewable resource, is considered to be a very promising alternative to fossil fuels. Lignocellulosic biomass mainly includes agricultural and forestry waste, municipal solid waste, herbaceous plants and wood, etc. As the world's largest agricultural country, China produces a large amount of agricultural waste every year. If these wastes, such as corn stalks, can be efficiently converted into bio-based chemicals, fuels or other industrial products, it will greatly reduce fossil fuels. The use of fuel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02C07D307/50C07D307/48
CPCB01J31/0225C07D307/48C07D307/50
Inventor 李文志朱远帅鲁怡娟关圣楠
Owner UNIV OF SCI & TECH OF CHINA
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