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Coal-based solid acid catalyst and preparation method thereof

A solid acid catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, carboxylate preparation, chemical instruments and methods, etc., can solve the problems of high cost and small specific surface area, and achieve low production cost, high activity and easy separation The effect of recycling

Inactive Publication Date: 2018-09-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention uses Yulin coal with abundant reserves as a raw material, processes coal powder to obtain carbon-based carrier activated carbon, and uses diazonium salt arylation to introduce acid groups to prepare solid catalysts, which can not only solve the current specific surface area of ​​solid acid catalysts The problem of small and high cost can also achieve the purpose of high value-added utilization of coal in the development of biodiesel, which has great application prospects

Method used

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  • Coal-based solid acid catalyst and preparation method thereof
  • Coal-based solid acid catalyst and preparation method thereof
  • Coal-based solid acid catalyst and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0046] 1, a kind of preparation method of coal-based solid acid catalyst, comprises the steps:

[0047] 1) Grind and sieve the Yulin coal to 200 mesh, and dry it in a blast drying oven at 105°C for later use;

[0048] 2) Mix 6 g of the coal powder obtained by drying in step 1) with 18 g of potassium hydroxide solid powder, and activate it at 800° C. for 90 minutes in a nitrogen protective atmosphere to obtain an activated product;

[0049] 3) Wash the activated product obtained in step 2) with 0.5mol / L hydrochloric acid until it is acidic, and stir it magnetically for 2 hours to ensure that it is fully dissolved, then wash and filter until the product is neutral and no chloride ions are detected, then bake at 105°C overnight dry to obtain activated carbon;

[0050] 4) Add 1.5g of activated carbon and 12g of p-aminobenzenesulfonic acid obtained in step 3) into 200ml of deionized water and mix, and place the mixed solution in an oil bath at 60°C with magnetic force stirring, th...

Embodiment 2

[0055] 1, a kind of preparation method of coal-based solid acid catalyst, comprises the steps:

[0056] 1) Grind and sieve the Yulin coal to 200 mesh, and dry it in a blast drying oven at 105°C for later use;

[0057] 2) Mix 6 g of the coal powder obtained by drying in step 1) with 18 g of potassium hydroxide solid powder, and activate it at 900° C. for 90 minutes in a nitrogen protective atmosphere to obtain an activated product;

[0058] 3) Wash the activated product obtained in step 2) with 0.5mol / L hydrochloric acid until it is acidic, and stir it magnetically for 2 hours to ensure that it is fully dissolved, then wash and filter until the product is neutral and no chloride ions are detected, then bake at 105°C overnight dry to obtain activated carbon;

[0059] 4) Add 1.5g of activated carbon and 12g of p-aminobenzenesulfonic acid obtained in step 3) into 200ml of deionized water and mix, and place the mixed solution in an oil bath at 60°C with magnetic force stirring, th...

Embodiment 3

[0063] 1, a kind of preparation method of coal-based solid acid catalyst, comprises the steps:

[0064] 1) Grind and sieve the Yulin coal to 200 mesh, and dry it in a blast drying oven at 105°C for later use;

[0065] 2) Mix 6 g of the coal powder obtained by drying in step 1) with 18 g of potassium hydroxide solid powder, and activate it at 900° C. for 90 minutes in a nitrogen protective atmosphere to obtain an activated product;

[0066] 3) Wash the activated product obtained in step 2) with 0.5mol / L hydrochloric acid until it is acidic, and stir it magnetically for 2 hours to ensure that it is fully dissolved, then wash and filter until the product is neutral and no chloride ions are detected, then bake at 105°C overnight dry to obtain activated carbon;

[0067] 4) Add 1.5 g of activated carbon and 9 g of p-aminobenzenesulfonic acid obtained in step 3) into 200 ml of deionized water and mix, and place the mixed solution in an oil bath at 45° C. with magnetic force stirring...

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Abstract

The invention relates to a preparation method for a coal-based solid acid catalyst. The preparation method comprises the following steps: 1) pulverizing Yulin coal, and carrying out sieving and drying; 2) mixing the dry pulverized coal with potassium hydroxide solid powder, and carrying out activation at a high temperature in a nitrogen protection atmosphere; 3) washing an activated product obtained in the step 2) with hydrochloric acid until the activated product is acidic, carrying out magnetic stirring, then carrying out washing and filtering until a product is neutral and no chlorine ionsare detected out, and carrying out drying so as to obtain activated carbon; 4) mixing the activated carbon obtained in the step 3) with p-aminobenzenesulfonic acid and deionized water, adding sodium hydroxide into an obtained mixed solution, controlling the pH of the solution to be in an alkaline range, and after a reaction is completed, continuing adding sodium nitrite and a hydrochloric acid solution, and carrying out a diazo reduction reaction; and 5) after completion of the diazo reduction reaction in the step 4), transferring an obtained mixture into a funnel, carrying out filtering and washing until the mixture is neutral, then carrying out washing to remove impurities from the surface of a catalyst, and carrying out drying to obtain the coal-based solid acid catalyst. The catalyst provided by the invention can promote high-value-added utilization of the Yulin coal in development of biodiesel.

Description

technical field [0001] The invention belongs to the technical field of biofuel catalysts, and in particular relates to a coal-based solid acid catalyst and a preparation method thereof. Background technique [0002] Biodiesel is a clean and renewable liquid biofuel produced by transesterification or esterification of renewable oils (such as animal and vegetable oils, waste catering oils, and microbial oils) with low-carbon chain alcohols. The main ingredient is long-chain fatty acid alkyl esters. The physical and chemical properties of biodiesel are similar to those of petrochemical diesel, and it is an excellent substitute for petrochemical diesel, known as "green diesel". Vigorously developing biodiesel technology has important strategic significance for environmental governance, economic development, and even energy security. Alkali-catalyzed transesterification is highly efficient in producing biodiesel, but it requires that the free fatty acid (FFA) mass fraction of t...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01J35/10B01J37/00B01J37/08C07C67/08C07C69/58C10L1/02C11C3/04
CPCC10L1/02C11C3/04C07C67/08B01J31/0269B01J37/00B01J37/084C10L2200/0476B01J35/617B01J35/633B01J35/647C07C69/58Y02E50/10
Inventor 牛胜利于贺伟韩奎华陈娟李英杰赵建立路春美
Owner SHANDONG UNIV
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