Process for preparing biodiesel by one-step method using biomass based sulfonation charcoal as fatty acid esterification and triglyceride transform esterification catalysts

A technology of triglyceride transesterification and sulfonated carbon, which is used in physical/chemical process catalysts, fatty acid production, fatty acid chemical modification, etc., can solve the problems of high cost, inability to industrialize application, large sewage discharge, and high manufacturing cost , to achieve the effect of excellent catalytic performance, less side reactions and low manufacturing cost

Inactive Publication Date: 2008-10-22
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current biodiesel production processes mainly include acid-base catalysis, enzyme catalysis, supercritical method, etc. Although the enzyme catalysis and supercritical methods have obvious advantages in environmental protection, the cost is too high for industrial application
In order to solve the problems of large sewage discharge and many side reactions in the acid-base catalysis method, the current development trend is to develop solid super acid (base) catalysts, but the traditional solid super acid (base) catalysts not only have an astonishingly high manufacturing cost, but also the three wastes. not to be underestimated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Crush 100 kg of fir bark through a 40-mesh sieve, soak it overnight with 300 kg of dilute sulfuric acid with a mass fraction of 10%, drain the water, and place it in a retort furnace with a preset temperature of 120°C for 6 hours of carbonization, during which time the condensation method is used Collect 133 kilograms of by-product mixtures such as acetic acid, furfural, methyl alcohol, obtain carbide and wash with deionized water to no free sulfate radical (BaCl 2 solution test method) was detected, and dried at 105±5°C for 2 hours with a blast drying oven to obtain 78 kg of fir bark-based sulfonated carbon, which was sealed and stored for later use; 1000 kg of degummed catering waste oil was taken, and industrial methanol 1000 kg, 75 kg of cedar bark-based sulfonated carbon, heated to 120 ° C, connected to the methanol rectification and water separation device, and the stirring reaction was terminated after 4 hours. The reactants were left to cool for 2 hours and sepa...

Embodiment 2

[0019] Crush 100 kg of coconut shell through a 60-mesh sieve, soak it overnight with 150 kg of dilute sulfuric acid with a mass fraction of 30%, drain the water, and place it in a dry distillation furnace with a preset temperature of 105°C for 4 hours to carbonize, during which the condensation method is used Collect 94 kilograms of by-product mixtures such as acetic acid, furfural, methyl alcohol, obtain carbide and wash with deionized water to no free sulfate radical (BaCl 2 solution test method) was detected, and dried at 105±5°C for 2 hours with a blast drying oven to obtain 86 kg of coconut shell-based sulfonated carbon, which was sealed and stored for later use; 1,000 kg of degummed rapeseed oil and 1,500 kg of industrial methanol were taken , 100 kg of coconut shell-based sulfonated carbon, heated to 85 ° C, and the reaction was terminated after stirring for 8 hours. The reactants were left to cool for 2 hours and separated by liquid separation. The lower layer was a mi...

Embodiment 3

[0021] Crush 100 kg of chestnut thorn buds through an 80-mesh sieve, soak overnight with 175 kg of dilute sulfuric acid with a mass fraction of 20%, drain the water, and place it in a dry distillation furnace with a preset temperature of 115°C for 5 hours. 88 kg of by-product mixtures such as acetic acid, furfural, and methanol were collected by the method, and the obtained carbide was washed with deionized water until there was no free sulfate (BaCl 2 solution test method) was detected, dried at 105 ± 5°C for 3 hours with a blast drying oven to obtain 77 kg of chestnut thorn-based sulfonated carbon, which was sealed and stored for later use; 1000 kg of degummed cottonseed oil and 1000 kg of industrial methanol were obtained. 1 kg, 75 kg of sulfonated carbon of chestnut echinacea group, heated to 125 ° C, connected to the methanol rectification and water separation device, and the stirring reaction was terminated after 4 hours. The reactants were left to cool for 1.5 hours and...

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Abstract

The invention relates to a method for making biodiesel oil through adopting biomass-based sulfonated carbon as fatty acid esterifying and triglyceride transesterification catalyst one-step method. The method is as follows: biomass raw material containing abundant lignin is crushed and dipped in dilute sulfuric acid, and then is dried and carbonized at the low temperature to obtain biomass-based sulfonated carbon with a porous structure; and the biomass-based sulfonated carbon is taken as catalyst to make fatty acid mono-alkyl ester (biodiesel oil) through base oil fatty acid esterifying and triglyceride transesterification one-step method. The method solves the problems that: the manufacturing process of biodiesel oil through the prior acid-base catalysis method is limited by the acid value of base oil; and waste water discharge is great. The catalyst, which is insensitive to the by-product moisture generated during biodiesel oil production and is easy to separate, is propitious to the purification of crude glycerol; moreover, the catalyst, with low production cost, not only can be reused, but also can be abandoned to be used as a soil improvement material.

Description

technical field [0001] The invention relates to a method for preparing biodiesel, in particular to a method for preparing biodiesel in a one-step method using biomass-based sulfonated carbon as a catalyst for esterification of fatty acids and transesterification of triglycerides. Background technique [0002] Using various animal and vegetable oils and fats (triglycerides) as raw materials to convert them into biodiesel (low-carbon alcohol esters of fatty acids) is the most successful alternative fuel so far. It is of great significance for human beings to deal with the shortage of liquid fuels, control greenhouse gas emissions, and promote ecological balance in the coming post-fossil era. The current biodiesel production processes mainly include acid-base catalysis, enzyme catalysis, supercritical method, etc. Although enzyme catalysis and supercritical methods have obvious advantages in environmental protection, the cost is too high to be applied industrially. In order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00B01J21/18B01J27/02C11C3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 刘玉环阮榕生李臣
Owner NANCHANG UNIV
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