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A preparation method of carbon base solid acid catalyst

A carbon-based solid acid and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc. problem, to achieve the effect of low cost, good catalytic effect and high catalytic activity

Inactive Publication Date: 2008-04-09
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, in the inorganic system, zirconia (ZrO 2 ) is treated with sulfuric acid, and the obtained sulfuric acid trace (sulfuric acid trace) zirconia is a solid acid catalyst with the strongest acidity, but there are not many traces of sulfuric acid on the surface, and the number of acid points per unit weight is less than that of liquid acid A lot, so far from meeting the requirements

Method used

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  • A preparation method of carbon base solid acid catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1 Condensation reaction:

[0022] Add 0.1mol p-toluenesulfonic acid, 0.2mol paraformaldehyde, and 0.5g sulfuric acid into a 100mL three-neck flask equipped with electromagnetic stirring, thermometer, reflux condenser, and water separator, heat and stir, and carry out condensation reaction at 120°C for 24h , to obtain a black solid.

[0023] Step 2 Washing, suction filtration and drying

[0024] After cooling the above black solid to room temperature, add hot water at 90°C for washing, and filter until the filtrate is clear and no sulfuric acid is detected, then place it in an oven at 120°C, and dry it for 1 day to obtain a new type of carbon Based solid acid catalyst, its acid value is 3.4mmol / g, and its thermal decomposition temperature is 220°C.

Embodiment 2-4

[0026] Except the following difference, all the other are the same as Example 1, heat and stir in 0.1mol p-toluenesulfonic acid, 0.5g sulfuric acid, carry out condensation reaction at 120 ℃, paraformaldehyde is used according to the ratio of Table 1.

[0027] Table 1

[0028] Example

Embodiment 5-7

[0030] Except following difference, all the other are identical with embodiment 1, and reaction time is respectively by the consumption of table 2.

[0031] Table 2

[0032] Example

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Abstract

The invention discloses a preparation method for novel carbon-based solid acid catalyst. The invention is characterized in that aroma sulfonic acid compound is taken as raw material, aldehyde compound is taken as coupling agent, inorganic strong acid is taken as catalyst, to perform the condensation reaction, after the reaction is finished, hot water is added to perform the cleaning and the filtration, to remove inorganic strong acid, and the drying is performed in a baking oven, thereby obtaining objective resultant. The obtained resultant of the invention has the advantages that the thermal stability is high, the acid value is high, the synthetic cost is low, the catalytic effect is good, and the catalyst can be repeatedly used time after time, etc.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a novel carbon-based solid acid catalyst. Background technique [0002] In today's crisis of energy problems and environmental problems, it has become the goal of modern chemical industry to effectively generate target products with a small amount of energy without producing unnecessary by-products. Acid catalysts are indispensable in the modern chemical industry and are widely used in the manufacture of various products such as pharmaceuticals, petrochemical products, and polymer products. However, most of the currently used liquid acid catalysts are hydrochloric acid and sulfuric acid. . When this acid catalyst is used in the production process, it needs to be neutralized by alkali, and it is separated and recovered from the product through processes such as removing the salt generated by neutralization. However, a considerable amount of energy is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06
Inventor 杨建国高珊梁学正龚国珍何鸣元
Owner EAST CHINA NORMAL UNIV
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