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Method for preparing biodiesel by using supported solid acid combining cosolvent

A biodiesel and solid acid catalyst technology, which is applied in the preparation of liquid hydrocarbon mixtures, biofuels, and biological raw materials, can solve problems such as environmental pollution and post-processing complexity, and achieve accelerated reaction rates and reduced post-processing procedures. cost effect

Inactive Publication Date: 2009-04-29
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to: propose a method for preparing biodiesel using loaded solid acid catalysis, and solve the traditional use of liquid acid or liquid alkali as a catalyst for post-processing complications and environmental pollution problems in combination with co-solvents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 25 grams of soybean oil, 22 grams of methyl alcohol and 1 gram of loaded zirconium sulfate tetrahydrate accounted for 40% of the total catalyst mass fraction of activated carbon into the autoclave, sealed the reactor and replaced the reactor with an inert gas air, added 8 grams of total Solvent C 4 h 10 . The pressure and temperature of the reactor are monitored in real time by instruments. The autoclave is heated by an external heater, and the temperature in the autoclave is monitored by Fe and Cu-Ni alloy thermocouples. Adjust the voltage to reach 180°C within 45 minutes, and control ±5°C for 30 minutes, during which the transesterification reaction is completed. Finally, it was transferred to a water bath to stop the reaction.

[0033] After the reaction, discharge gas, pour the mixture in the autoclave into the collector, and wash the autoclave with methanol. The catalyst is separated first, and the product to be treated settles for 60 minutes and is divided in...

Embodiment 2

[0036] 20 grams of soybean oil, 17.6 gram of methanol and 0.8 gram of activated carbon with zirconium sulfate tetrahydrate accounted for 40% of the total catalyst mass fraction were packed into an autoclave, the reactor was sealed and the air in the reactor was replaced with an inert gas, and 2gCO2 was added. The pressure and temperature of the reactor are monitored in real time by instruments. The autoclave is heated by an external heater, and the temperature in the autoclave is monitored by Fe, Cu—Ni alloy thermocouples. Adjust the voltage to reach 180°C within 45 minutes, and control ±5°C for 30 minutes, during which the transesterification reaction is completed. Finally, it was transferred to a water bath to stop the reaction.

[0037]After the reaction, discharge gas and collect it, pour the mixture in the autoclave into the collector, and wash the autoclave with methanol. The catalyst is separated first, and the product to be treated settles for 60 minutes and is divid...

Embodiment 3

[0040] 20 grams of soybean oil, 17.6 gram of methyl alcohol and 0.8 gram of loaded zirconium sulfate tetrahydrate account for 40% gac of the total catalyst mass fraction in the autoclave, seal the reactor and replace the air in the reactor with inert gas, add 3.8 grams of auxiliary Solvent CO2. The pressure and temperature of the reactor are monitored in real time by instruments. The autoclave is heated by an external heater, and the temperature in the autoclave is monitored by Fe and Cu-Ni alloy thermocouples. Adjust the voltage to reach 140 ° C within 30 minutes, control ± 5 ° C, 30 minutes, the transesterification reaction is completed during the period. Finally, it was transferred to a water bath to stop the reaction.

[0041] After the reaction, discharge gas, pour the mixture in the autoclave into the collector, and wash the autoclave with methanol. The catalyst is separated first, and the product to be treated settles for 60 minutes and is divided into 3 layers. The ...

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Abstract

The invention discloses a method for producing biodiesel in the presence of a supported solid acid catalyst and a solubilizing agent. The method is characterized in that: (1) a hydrophobic solid acid catalyst which is high in catalytic efficiency, recyclable, easily separable and simple in post treatment process is adopted; (2) a cosolvent is introduced during a reaction process to improve reaction conditions and reduce reaction temperature and pressure; (3) the cosolvent and lower alcohols used in the reaction can be recycled; and (4) equipment corrosion and environmental pollution are avoided and advantages of low requirements on equipment corrosion, short technical process, environmental-friendly production, low investment in equipment and low operation cost are achieved.

Description

technical field [0001] The invention relates to the technical field of green and renewable energy, and specifically refers to a method for preparing biodiesel by using loaded solid acid catalysis. Due to the use of solid acid, the final product is easy to handle and has reached the current foreign biodiesel quality standards. The use of a co-solvent in the reaction greatly improves the reaction conditions. Background technique [0002] Diesel, as an important petroleum refining product, occupies a relatively high share in the fuel structure of various countries and has become an important power fuel. With the acceleration of dieselization of vehicles worldwide, the demand for diesel will increase in the future. With the depletion of petroleum resources and the improvement of people's awareness of environmental protection, people begin to pay attention to the substitutes of petroleum fuels. Biodiesel is a renewable energy produced from vegetable or animal fats and can be us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00B01J29/82
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 曹维良张志刚张敬畅
Owner BEIJING UNIV OF CHEM TECH
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