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Solid acid material applied to catalytic synthesis of biodiesel and preparation method of solid acid material

A technology for synthesizing biological and solid acids, which is applied in the fields of physical chemistry and material chemistry, can solve the problems of rapid deactivation of sulfur element loss and other problems, achieve high transesterification activity between soybean oil and methanol, simple and easy process, and high reproducibility Effect

Pending Publication Date: 2021-08-24
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sulfated zirconia prepared by Garcia using a solvent-free method can obtain 100% conversion of soybean oil at 120 °C, but the shortcomings of rapid deactivation and loss of sulfur seriously limit its application

Method used

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  • Solid acid material applied to catalytic synthesis of biodiesel and preparation method of solid acid material
  • Solid acid material applied to catalytic synthesis of biodiesel and preparation method of solid acid material
  • Solid acid material applied to catalytic synthesis of biodiesel and preparation method of solid acid material

Examples

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Effect test

Embodiment 1

[0033] A method for preparing a solid acid material used in the catalytic synthesis of biodiesel. The specific preparation process is as follows: (1) under strong stirring at 32°C, 4g of zirconium nitrate pentahydrate, 0.2g of tin tetrachloride pentahydrate, 0.3g of triethanolamine was dissolved in 50ml of absolute ethanol to obtain a clear solution, which was counted as solution A; 0.8g of bis-octaalkyldimethylammonium chloride was dissolved in 10ml of absolute ethanol, and it was counted as solution B; Dimethyl ammonium chloride ethanol solution is slowly added in the solution A;

[0034] (2) Transfer the mixed solution to a hydrothermal kettle lined with 100ml polytetrafluoroethylene, and treat it at 70°C for 4 hours to obtain a pre-crystallized product;

[0035] (3) Transfer the pre-crystallized product to a glass beaker, and slowly add ammonia water dropwise under stirring conditions to adjust the pH of the solution to 9;

[0036] (4) Transfer the above product to a hydr...

Embodiment 2

[0043] A preparation method of a solid acid material applied to catalyze the synthesis of biodiesel, the specific preparation process is as follows:

[0044] (1) Dissolve 6g of zirconium chloride octahydrate, 0.07g of anhydrous tin tetrachloride, and 0.25g of triisopropanolamine in 50ml of absolute ethanol in sequence under strong stirring at 32°C to obtain a clear solution, which is called solution A; Dissolve 1.1g of double-decyl dimethyl ammonium chloride in 10ml of absolute ethanol, and count it as solution B; slowly add the ethanol solution of double-decyl dimethyl ammonium chloride to solution A;

[0045] (2) Transfer the mixed solution to a hydrothermal kettle lined with 100ml polytetrafluoroethylene, and treat it at 80°C for 4 hours to obtain a pre-crystallized product;

[0046] (3) Transfer the pre-crystallized product to a glass beaker, and slowly add ammonia water dropwise under stirring conditions to adjust the pH of the solution to 9;

[0047] (4) Transfer the ab...

Embodiment 3

[0054] A preparation method of a solid acid material applied to catalyze the synthesis of biodiesel, the specific preparation process is as follows:

[0055] (1) Under strong stirring at 32°C, dissolve 5g of zirconium sulfate tetrahydrate, 0.11g of tin tetrabromide, and 0.3g of triisopropanolamine in 50ml of absolute ethanol in sequence to obtain a clear solution, which is counted as solution A; Cetyltrimethylammonium chloride is dissolved in 10ml of absolute ethanol, which is counted as solution B; cetyltrimethylammonium chloride ethanol solution is slowly added to solution A;

[0056] (2) Transfer the mixed solution to a hydrothermal kettle lined with 100ml polytetrafluoroethylene, and treat it at 90°C for 3 hours to obtain a pre-crystallized product;

[0057] (3) Transfer the pre-crystallized product to a glass beaker, and slowly add ammonia water dropwise under stirring conditions to adjust the pH of the solution to 9;

[0058] (4) Transfer the above product to a hydrothe...

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Abstract

The invention discloses a solid acid material applied to catalytic synthesis of biodiesel and a preparation method of the solid acid material, wherein the preparation method specifically comprises the steps: transferring a solution into a hydrothermal kettle to be treated to obtain a pre-crystallized product, and adjusting the pH to 9 through ammonia water; and transferring the product into the hydrothermal kettle for further crystallization, washing the product obtained by secondary crystallization with ethanol until the product is neutral, drying in a drying oven, removing a template agent, impregnating the roasted product in a sulfuric acid solution, carrying out suction filtration on the obtained product, and roasting the dried product of a filter cake to obtain the acid catalytic material, wherein the raw material dosage meets the requirement that the molar ratio of a zirconium source to organic amine to organic ammonium salt to a tin source to absolute ethyl alcohol is (900-1820):(125-270):(250-400):(25-140):100000. The solid acid material prepared by the method can be used for catalyzing a reaction for preparing biodiesel through transesterification of soybean oil and methanol, and can show extremely high transesterification activity of soybean oil and methanol and biodiesel selectivity; and the preparation process is simple and easy to implement and high in reproducibility.

Description

technical field [0001] The invention belongs to the category of physical chemistry and material chemistry, and discloses a solid acid material used in catalytic synthesis of biodiesel and a preparation method. Background technique [0002] Since entering the 21st century, energy crisis and environmental pollution have become major issues facing all mankind. The contradiction between oil supply and demand has become increasingly prominent, and research on new alternative energy sources has become a top priority. Especially for our country, with the rapid economic development in recent years, the demand for oil has increased sharply, and the supply gap is getting bigger and bigger. Under this background, countries have accelerated the pace of development of alternative energy sources of fossil fuels, among which biodiesel has attracted the attention of various countries because of its superior environmental performance. The main components of biodiesel are fatty acid methyl ...

Claims

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Application Information

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IPC IPC(8): B01J27/053B01J35/10B01J37/02B01J37/08C11C3/10C10L1/02
CPCB01J27/053B01J37/0201B01J37/08C11C3/10C10L1/02B01J35/615B01J35/633B01J35/647Y02E50/10
Inventor 李瑞丰刘宏乾潘大海于峰张继龙马静红
Owner TAIYUAN UNIV OF TECH