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Biodiesel catalyst and method for preparing biodiesel by using same

A biodiesel and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of high production cost

Inactive Publication Date: 2012-11-07
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, a large amount of sulfonic acid-functionalized imidazole ionic liquid is required to complete the preparation of biodiesel, but the preparation cost of such ionic liquid is very high

Method used

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  • Biodiesel catalyst and method for preparing biodiesel by using same
  • Biodiesel catalyst and method for preparing biodiesel by using same
  • Biodiesel catalyst and method for preparing biodiesel by using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Catalyzed esterification of oleic acid with tetrasulfonic acid functionalized urotropine bisulfate ionic liquid to prepare biodiesel

[0065] 1. Preparation of Tetrasulfonic Acid Functionalized Urotropine Bisulfate Ionic Liquid

[0066] A) Dissolve one equivalent of urotropine and four equivalents of 1,4-butane sultone in toluene, heat to 80°C, and keep stirring at 80°C until there is no more white precipitate, react After the system was cooled, it was filtered, and the precipitate was washed with toluene, and then dried at 80°C under a relative vacuum of -0.095MPa to obtain a white inner salt with a yield of 99.0%;

[0067] B) Dissolve the white internal salt in water, add concentrated sulfuric acid dropwise while stirring at room temperature (20°C), stir evenly, and react for 2 hours, then evaporate and remove water at 60°C under the condition of relative vacuum of -0.095MPa, Promptly obtain a kind of clear liquid that is liquid at room temperature, N', N", N"', N""-...

Embodiment 2

[0074] Disulfonic acid-functionalized N,N,N′,N′-tetramethylethylenediamine bisulfate ionic liquid catalyzed esterification of oil to biodiesel

[0075] 1. Preparation of disulfonic acid functionalized N,N,N',N'-tetramethylethylenediamine hydrogensulfate ionic liquid

[0076] A) Dissolve one equivalent of N, N, N', N'-tetramethylethylenediamine and two equivalents of 1,4-butane sultone in toluene, heat to 80°C, and Stir continuously until there is no more white precipitate, filter the white precipitate, wash the precipitate with toluene, and then dry at 80°C under a relative vacuum of -0.095MPa to obtain a white inner salt with a yield of 99.5%;

[0077] B) Dissolve the white internal salt in water, add concentrated sulfuric acid dropwise while stirring at room temperature (20°C), stir evenly, and react for 2 hours, then evaporate and remove water at 60°C under the condition of a relative vacuum of -0.095MPa, namely Obtain a liquid clear liquid at room temperature, that is, N,...

Embodiment 3

[0082] Disulfonic acid functionalized triethylenediamine bisulfate ionic liquid catalyzed esterification of oil to biodiesel

[0083] 1. Preparation of disulfonic acid functionalized triethylenediamine bisulfate ionic liquid

[0084] A) Dissolve one equivalent of triethylenediamine and two equivalents of 1,4-butane sultone in toluene, heat to 80°C, and keep stirring at 80°C until there is no more white precipitate. The white precipitate was filtered, washed with toluene, and then dried at 80°C under a relative vacuum of -0.095MPa to obtain a white inner salt with a yield of 99.1%;

[0085] B) Dissolve the white internal salt in water, add concentrated sulfuric acid dropwise while stirring at room temperature (15°C), stir evenly, and react for 2 hours, then evaporate and remove water at 60°C under the condition of relative vacuum of -0.095MPa, namely Obtain a kind of clear liquid that is liquid at room temperature, promptly get N, N '-dibutanesulfonic acid group-triethylenedia...

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Abstract

The invention relates to a method for synthesizing biodiesel based on multi-sulfoacid functional ion liquid. The method is characterized by synthesizing the biodiesel through esterification reaction by using fatty acid and alcohol as standard reactants and selecting the multi-sulfoacid functional ion liquid as a catalyst. The method has the advantages of low corrosivity, high catalyst activity, clean reaction process and simple and convenient post-treatment; and the catalyst has the characteristics of high-density reactive site of liquid acid, non-volatility of solid acid and easy separation property and reusability, and waste oils contain a large amount of fatty acid, so the method of the invention can be taken as an important method for industrial use of the waste oils.

Description

technical field [0001] The invention relates to the technical field of bio-oil synthesis and green and renewable energy, in particular to a method for preparing biodiesel based on the catalysis of polysulfonic acid functionalized ionic liquid. Background technique [0002] With the depletion of petrochemical energy and the deterioration of the ecological environment, the development of new green and environmentally friendly energy has become an inevitable trend. Biodiesel is a kind of biomass energy and an excellent substitute fuel for petrochemical diesel. As a renewable energy source, biodiesel has unique environmental protection advantages: the emissions of soot particles, sulfur content, and carbon monoxide in the combustion tail gas are significantly reduced. , the harmful substances in the tail gas emitted by combustion are 50% lower than that of traditional petrochemical diesel, and biodiesel itself has the advantages of easy biodegradation, high cetane number, good l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02C11C3/00C07C67/08C07C69/58C07C69/24C07C69/587C10L1/02
CPCY02E50/13Y02E50/10Y02P20/584
Inventor 王波刘晔王博超许凤孙润仓
Owner BEIJING FORESTRY UNIVERSITY
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