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Synthesis method of environmentally-friendly vehicle biodiesel

A technology of biodiesel and synthesis method, applied in the direction of biofuel, chemical instrument and method, organic compound/hydride/coordination complex catalyst, etc., can solve the problem of no recyclability, etc., and achieve easy recovery and high catalysis Good performance and stability

Active Publication Date: 2019-11-12
河北复亚能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these solid basic catalysts have little or no recyclability due at least in part to the solubility of solid metal oxides and hydroxides in methanol.

Method used

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  • Synthesis method of environmentally-friendly vehicle biodiesel
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  • Synthesis method of environmentally-friendly vehicle biodiesel

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preparation example Construction

[0036] In one embodiment, the preparation method of transesterification catalyst comprises the steps:

[0037] Deashed lignin is obtained by removing ash from lignin through acid pretreatment; the ash in lignin promotes the release of volatile matter during the carbonization process, so that the yield of activated carbon is relatively low, and acid pretreatment lignin can effectively remove Inorganic salt ash in lignin;

[0038] Mix deashed lignin with activator and then knead to obtain kneaded lignin;

[0039] Carbonize the kneaded lignin to obtain activated carbon particles;

[0040] Add anhydrous toluene and silane coupling agent to the activated carbon, and reflux to obtain modified activated carbon particles; avoid the presence of water during this process;

[0041] Phosphorous acid is added to the modified active carbon, reflux reaction, and formaldehyde solution is added dropwise to obtain a transesterification catalyst.

[0042]In this preparation method, the obtain...

Embodiment 1

[0059] The preparation method of transesterification catalyst comprises the steps:

[0060] S1: Dissolve lignin in deionized water at a solid-to-liquid ratio of 1:5g / mL, add concentrated sulfuric acid during stirring to make the pH 1.5, continue stirring at 80°C for 5 hours, remove ash, centrifuge and wash until the pH is low Change and dry to obtain deashed lignin;

[0061] S2: Add phosphoric acid to the delimed lignin obtained in step S1 at a solid-to-liquid ratio of 1:4g / mL, mix thoroughly, and knead at 150°C for 45 minutes to obtain kneaded lignin;

[0062] S3: Put the kneaded lignin obtained in step S2 at a temperature of 550°C and N 2 Carry out carbonization and activation at the same time at a flow rate of 80mL / min for 3 hours, wash until the washing water is close to neutral, and dry to obtain activated carbon particles;

[0063] S4: According to the solid-to-liquid ratio of 1:3g / mL, add anhydrous toluene to the activated carbon obtained in step S3, and then add a si...

Embodiment 2

[0066] The preparation method of transesterification catalyst comprises the steps:

[0067] S1: Dissolve lignin in deionized water at a solid-to-liquid ratio of 1:5g / mL, add concentrated sulfuric acid during stirring to make the pH 1.5, continue stirring at 80°C for 5 hours, remove ash, centrifuge and wash until the pH is low Change and dry to obtain deashed lignin;

[0068] S2: Add phosphoric acid to the delimed lignin obtained in step S1 at a solid-to-liquid ratio of 1:4g / mL, then add polyethylene glycol with 0.3% by weight of phosphoric acid and sodium hypophosphite with 0.02% by weight of phosphoric acid, mix thoroughly, and Kneading at 150°C for 45 minutes to obtain kneading lignin, polyethylene glycol and sodium hypophosphite;

[0069] S3: Put the kneaded lignin obtained in step S2 at a temperature of 550°C and N 2 Carry out carbonization and activation at the same time at a flow rate of 80mL / min for 3 hours, wash until the washing water is close to neutral, and dry to...

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Abstract

The invention provides a synthesis method of environmentally-friendly vehicle biodiesel, and belongs to the technical field of biodiesel. The synthesis method comprises: making grease, a short-chain alcohol and a transesterification catalyst under a transesterification reaction condition to synthesize biodiesel; and mixing the biodiesel, lightened coal tar and liquid paraffin, and filtering to obtain the biodiesel for vehicles, wherein the transesterification catalyst is active carbon having an aminomethylphosphonic acid group on the surface. According to the present invention, the transesterification catalyst for synthesizing biodiesel has characteristics of high catalytic performance and high efficiency in methyl oleate synthesis, can be separated through filtering after the complete reaction, and further has performances of easy recovery, good stability and reusability; and the synthesis method has characteristics of high yield of biodiesel and no requirement of extraction, and caneconomically prepare high-grade biodiesel for vehicles.

Description

technical field [0001] The invention belongs to the technical field of biodiesel, and in particular relates to a method for synthesizing environment-friendly biodiesel for vehicles. Background technique [0002] Biodiesel is a mixture of fatty acid methyl esters (fatty acid ethyl esters). This mixture is obtained from fatty acid triglycerides (vegetable oil, animal fat, microalgae, etc.) and short-chain alcohols such as methanol and ethanol through transesterification to obtain fatty acid methyl ester (ethyl ester) and by-product glycerin. Because the physical and chemical properties of biodiesel are very similar to those of petrochemical diesel, and it has the advantages of less harmful substance emissions, complete combustion, and biodegradability, it has become the fastest growing and most promising alternative energy in the world in recent years. The raw materials for the production of biodiesel mainly include soybean oil, rapeseed oil, palm oil, cottonseed oil, jatroph...

Claims

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Application Information

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IPC IPC(8): C11C3/10B01J31/02
CPCC11C3/10B01J31/0267Y02E50/10
Inventor 李常飞
Owner 河北复亚能源科技有限公司
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