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Thorium-doped diatomite supported p-toluenesulfonic acid catalyst, and preparation method and application thereof

A technology of p-toluenesulfonic acid and diatomaceous earth, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of large catalyst consumption and difficult recovery. , to reduce external energy consumption, improve dehydration performance, and achieve good low-temperature activity.

Active Publication Date: 2018-11-30
浙江利欧环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is easily soluble in methanol, which causes problems such as large catalyst consumption and difficult recovery.

Method used

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  • Thorium-doped diatomite supported p-toluenesulfonic acid catalyst, and preparation method and application thereof
  • Thorium-doped diatomite supported p-toluenesulfonic acid catalyst, and preparation method and application thereof
  • Thorium-doped diatomite supported p-toluenesulfonic acid catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of thorium-doped diatomite-supported p-toluenesulfonic acid catalyst

[0038] Take a certain amount of diatomaceous earth and soak it in dilute nitric acid with a mass fraction of 10% for 24 hours, wash it with distilled water and drain it, and then activate it at 25°C for 2 hours.

[0039] Take 10 g of the diatomite obtained in the previous step, pour it into 60 mL of 20% p-toluenesulfonic acid solution, and let it stand for 30 h.

[0040] The mixed solution from the previous step was filtered and dried at 25° C. for 5 h to obtain a diatomaceous earth-supported p-toluenesulfonic acid catalyst.

[0041] Take 50mL of thorium nitrate solution with a thorium ion concentration of 0.1g / L, impregnate 0.5g of the catalyst obtained in the previous step into it, disperse evenly through ultrasonication, and then evaporate the solution to dryness at 25°C.

[0042] Place the sample obtained in the previous step in a muffle furnace, heat up to 300°C at a rate of 0.1...

Embodiment 2

[0047] (1) Preparation of thorium-doped diatomite-supported p-toluenesulfonic acid catalyst

[0048] Take a certain amount of diatomaceous earth and soak it in dilute nitric acid with a mass fraction of 11% for 22 hours, wash it with distilled water and drain it, and then activate it at 75°C for 1.5 hours.

[0049] Take 12g of the diatomaceous earth obtained in the previous step, pour it into 75mL of 25% p-toluenesulfonic acid solution, and let it stand for 32h.

[0050] The mixed solution from the previous step was filtered and dried at 75° C. for 4 hours to obtain a diatomaceous earth-supported p-toluenesulfonic acid catalyst.

[0051] Take 200mL of thorium nitrate solution with a thorium ion concentration of 1.5g / L, impregnate 2g of the catalyst obtained in the previous step in it, disperse evenly through ultrasonication, and then evaporate the solution to dryness at 90°C.

[0052] Place the sample obtained in the previous step in a muffle furnace, raise the temperature to...

Embodiment 3

[0057] Take a certain amount of diatomite and soak it in dilute nitric acid with a mass fraction of 12% for 20 hours, wash it with distilled water and drain it, and then activate it at 120°C for 1 hour.

[0058] Take 15g of the diatomite obtained in the previous step, pour it into 90mL of 30% p-toluenesulfonic acid solution, and let it stand for 35h.

[0059] The mixed solution from the previous step was filtered and dried at 110° C. for 3 hours to obtain a diatomaceous earth-supported p-toluenesulfonic acid catalyst.

[0060] Take 400mL of thorium nitrate solution with a thorium ion concentration of 3g / L, impregnate 4g of the catalyst obtained in the previous step in it, disperse evenly through ultrasonication, and evaporate the solution to dryness at 150°C.

[0061] Place the sample obtained in the previous step in a muffle furnace, heat up to 1100°C at a rate of 10°C / min, and calcinate at this temperature for 5 hours to obtain a diatomite-supported p-toluenesulfonic acid ca...

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Abstract

The invention discloses a preparation method of a thorium-doped diatomite supported p-toluenesulfonic acid catalyst, wherein the preparation method includes the following steps: (1) soaking diatomitewith a dilute nitric acid solution, washing cleanly, extracting to be dried and activating in turn, cooling, then pouring into a p-toluenesulfonic acid solution, allowing to stand, and then filteringand drying in turn to obtain a diatomite supported p-toluenesulfonic acid catalyst; and (2) impregnating the diatomite supported p-toluenesulfonic acid catalyst in a thorium salt solution, carrying out ultrasonic dispersion uniformly, evaporating the solution to be dried, and then calcining to obtain the product. The diatomite supported p-toluenesulfonic acid solid catalyst having high catalytic activity is combined with the rare earth element thorium, so the defects of low catalytic activity and low catalyst recovery rate in the prior art are overcome, and the thorium-doped diatomite supported p-toluenesulfonic acid catalyst having good low temperature activity, promoting carbonization and dehydration of solid waste and increasing calorific value is provided.

Description

technical field [0001] The invention belongs to the field of solid waste treatment, and in particular relates to a thorium-doped diatomite-loaded p-toluenesulfonic acid catalyst and its application in low-temperature carbonization of kitchen waste. Background technique [0002] With the continuous growth of economy and population, the generation of food waste will increase rapidly in the next 25 years, and this phenomenon will be very obvious in Asian countries. Statistics show that from 2005 to 2025, the annual output of urban kitchen waste in Asian countries will increase from 278 million tons to 416 million tons. The development of the Asian economy will drive the great progress of our country's national economy, the people's living standards will continue to improve, the urban catering industry will become increasingly prosperous, and the amount of kitchen waste will also increase unprecedentedly. In my country, there are 667 cities with an official system, more than 3....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J31/02B01J35/10B09B3/00
CPCB01J23/10B01J31/0225B09B3/40B01J35/60B01J35/613
Inventor 余晓琴冯华军陈婷梁禹翔周绸缪陈维沈东升陈锦奎
Owner 浙江利欧环保科技有限公司
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