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Preparation method of spherical sludge-based solid acid catalyst as well as product and application of spherical sludge-based solid acid catalyst

A solid acid catalyst and sludge technology, which is applied in the field of solid waste recycling, can solve problems such as undiscovered and secondary pollution, and achieve the effects of improving modification effect, easy recovery and reducing pollutant discharge.

Active Publication Date: 2022-06-24
HUAIYIN TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is easy to cause secondary pollution after chemical sludge is landfilled, and some strong carcinogens will be produced during incineration. Therefore, it is necessary to find a more suitable method to realize the effective disposal of chemical sludge
[0004] At present, there have been related studies on the use of sludge for the preparation of activated carbon. Activated carbon obtained by roasting sludge has a high specific surface area and can be used as an adsorbent to adsorb heavy metals or toxic and harmful gases. There are also related studies. Show that, Activated carbon prepared from sludge can be used as a catalyst for some chemical reactions after being loaded with other active components, but it has not been found to be used to catalyze the addition reaction of 2-phenyloxirane and methanol to form 2 -Related reports on spherical sludge-based solid acid catalysts for methoxy-2-phenylethanol

Method used

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  • Preparation method of spherical sludge-based solid acid catalyst as well as product and application of spherical sludge-based solid acid catalyst
  • Preparation method of spherical sludge-based solid acid catalyst as well as product and application of spherical sludge-based solid acid catalyst
  • Preparation method of spherical sludge-based solid acid catalyst as well as product and application of spherical sludge-based solid acid catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation of spherical sludge-based solid acid catalyst includes the following steps:

[0031] (1) First, add 10.0 g of air-dried chemical sludge to 60.0 mL of 5.5 mol / L hydrochloric acid and soak it for 10 hours; then filter it, wash it with deionized water until it becomes neutral, dry it and place it in a nitrogen atmosphere at 500 °C for preheating. Carbonized for 2h; then take 5.0g of the above-obtained solid and add it to 35.0mL of 6mol / L NaOH solution and soak it for 36h, filter, wash, dry, and finally put the obtained solid in a nitrogen atmosphere at 750 °C for high-temperature carbonization for 2h to obtain activated carbon .

[0032] (2) Preparation of acidified attapulgite: add 15.0 g of 150 mesh natural attapulgite to 50.0 ml of 8 mol / L hydrochloric acid; place the mixture in a constant temperature shaker and shake at 80°C for 2 hours; separate the solid by centrifugation and wash with deionized water The filtrate was neutral, and finally the obtaine...

Embodiment 2

[0037] The preparation of spherical sludge-based solid acid catalyst includes the following steps:

[0038] (1) First, 10.0g of air-dried chemical sludge was added to 25.0mL of 5mol / L hydrochloric acid and soaked for 14h; then filtered, washed with deionized water until neutral, dried and placed in a nitrogen atmosphere at 450°C for pre-carbonization 2.5h; then take 5.0g of the solid obtained above and add it to 35.0mL of 6mol / L NaOH solution for immersion for 24h, filter, wash, dry, and finally put the obtained solid in a nitrogen atmosphere at 700 ℃ high temperature carbonization for 2.5h, that is, Activated carbon.

[0039](2) Preparation of acidified attapulgite: add 10.0 g of 150 mesh natural attapulgite to 50.0 ml of 8 mol / L hydrochloric acid; place the mixture in a constant temperature shaker and shake at 60°C for 2 hours; separate the solid by centrifugation and wash with deionized water Until the filtrate is neutral, finally, the obtained sample is dried at 110° C. f...

Embodiment 3

[0044] The preparation of spherical sludge-based solid acid catalyst includes the following steps:

[0045] (1) First, 10.0g of air-dried chemical sludge was added to 25.0mL of 6mol / L nitric acid and soaked for 18h; then filtered, washed with deionized water until neutral, dried and placed in a nitrogen atmosphere at 400°C for pre-carbonization 2.5h; then take 5.0g of the above-obtained solid and add it to 35.0mL of 7mol / L NaOH solution for immersion for 24h, filter, wash, dry, and finally put the obtained solid in a nitrogen atmosphere at 800 °C for high temperature carbonization for 2.5h, that is, Activated carbon.

[0046] (2) Preparation of acidified attapulgite: add 12.0 g of 150 mesh natural attapulgite to 50.0 ml of 8 mol / L hydrochloric acid; place the mixture in a constant temperature shaker and shake at 60°C for 2 hours; separate the solid by centrifugation and wash with deionized water Until the filtrate is neutral, finally, the obtained sample is dried at 110° C. f...

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Abstract

The invention discloses a preparation method of a spherical sludge-based solid acid catalyst as well as a product and application of the spherical sludge-based solid acid catalyst, and belongs to the technical field of solid waste resourceful treatment. The method comprises the following steps: dipping chemical sludge in an acid solution, pre-carbonizing, dipping in an alkali solution, and activating at high temperature to obtain activated carbon; then adding attapulgite and an ethanol solution, mixing, stirring and shaping, and then aging and roasting; the preparation method comprises the following steps: carrying out amination modification on an obtained sample by using 3-aminopropyltriethoxysilane, finally carrying out sulfonation modification, washing and drying the obtained solid to obtain the spherical sludge-based solid acid catalyst, and applying the spherical sludge-based solid acid catalyst to an addition reaction of 2-phenyl ethylene oxide and methanol to make the yield of 2-methoxy-2-phenylethanol reach 91.2%. The chemical sludge is used as a basic raw material, and resource utilization of chemical solid waste is achieved; the spherical sludge-based solid acid catalyst prepared by the invention has the advantages of high catalytic efficiency, easiness in recovery, reusability and the like.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling treatment, and in particular relates to a preparation method of a spherical sludge-based solid acid catalyst, its product and application. Background technique [0002] The chemical industry is usually accompanied by the production of sewage, most of which are toxic and have complex components, making it difficult to purify and reuse them. The sludge soaked in sewage contains a large amount of pathogenic bacteria, parasites, heavy metals and other harmful substances. If handled properly, it will cause serious pollution to water, soil and air, and indirectly endanger human physical and mental health. [0003] Most chemical companies use sludge to dehydrate it, and then send it to the hazardous waste treatment center for centralized treatment. The centralized treatment methods mainly include landfill and incineration. However, after the chemical sludge is landfilled, it is easy to cau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/02B01J35/08C07C41/03C07C43/178
CPCB01J27/02C07C41/03B01J35/51C07C43/1782
Inventor 朱凤霞吴飞跃褚效中高麦爱蒋倩雯葛瑞朱晴晴周勇李梅生孙小军王飞蔡文婷陈立琪田家旭
Owner HUAIYIN TEACHERS COLLEGE
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