Biodiesel for coal flotation and preparation method of biodiesel

A biodiesel and flotation technology, which is applied in flotation, biofuel, petroleum industry and other directions, can solve the problems of difficult realization of ultrasonic reaction conditions and great influence, and achieve the goal of promoting green environmental protection development, reducing production costs, and achieving obvious selectivity. Effect

Inactive Publication Date: 2015-02-04
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN101289629A discloses a method for preparing biodiesel in one step using biomass-based sulfonated carbon as a catalyst. The prepared biodiesel reaches the index of GB / T20828-2007, but its catalyst preparation is greatly affected by raw materials
CN101294096A discloses adopting nano-whisker catalysts to react under ultrasonic conditions, and the productive rate reaches 97%, but the ultrasonic reaction conditions it uses are more difficult to realize industrially
The biodiesel prepared by the above methods is mainly used as fuel, and the application as coal flotation agent has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0021] Get free fatty acid and triglyceride fatty acid ester content and be respectively 41.8g of waste oil and methyl alcohol 27.1g of 15% and 85%, join in the 100mL batch type reactor and mix, add 4.2g porous superacid SO 4 2- / ZrO 2 Catalyst (with a specific surface area of ​​220m 2 / g, the pore size is 1.9nm and 2.2nm), stirred and reacted at 120℃, 0.1MPa for 3h, after the reaction, the catalyst was filtered out, and the product was separated into layers. Take the supernatant liquid and catalyst and continue to add to the reaction kettle, then add 27.1g methanol, stir and react at 150°C, 0.5MPa for 1h, filter out the catalyst again, let the product stand for stratification, and take the supernatant liquid to obtain coal floatation. biodiesel. After analysis, the fatty acid methyl ester content in the biodiesel was 68.8%, the diglyceride fatty acid ester content was 6.6%, the glycerol mono fatty acid ester content was 24.4%, and the triglyceride fatty acid ester content ...

Embodiment approach 2

[0024] Get free fatty acid and triglyceride fatty acid ester content and be respectively 41.8g of waste oil and methyl alcohol 22.3g of 10% and 90%, join in the 100mL batch type reactor and mix, add 2.2g porous superacid SO 4 2- / ZrO 2 Catalyst (with a specific surface area of ​​220m 2 / g, the pore size is 1.9nm and 2.2nm), stirred and reacted at 180°C and 2.5MPa for 1h, after the reaction, the catalyst was filtered out, and the product was allowed to stand and separate into layers. Take the supernatant and the catalyst and continue to add it to the reaction kettle, then add 22.3g of methanol, stir and react at 150°C and 0.5MPa for 0.5h, filter out the catalyst again, put the product to stand and separate, and take the supernatant to obtain coal flotation Use biodiesel. After analysis, the fatty acid methyl ester content in the biodiesel was 65.8%, the diglyceride fatty acid ester content was 8.4%, the glycerol mono fatty acid ester content was 24.1%, and the triglyceride f...

Embodiment approach 3

[0027] Get free fatty acid and fatty acid triglyceride content and be respectively 41.8g of waste oil and methanol 14.8g of 2% and 98%, join in the 100mL batch type reactor and mix, add 3.6g mesoporous superacid SO 4 2- / ZrO 2 -SiO2 Catalyst (with a specific surface area of ​​450m 2 / g, the pore size is 3.9nm), stirred and reacted at 200°C and 4.8MPa for 0.5h, after the reaction, the catalyst was filtered out, and the product was left to separate into layers. Take the supernatant liquid and catalyst and continue to add to the reaction kettle, then add 14.8g methanol, stir and react at 200°C, 4.0MPa for 0.5h, filter out the catalyst again, put the product to stand and separate, and take the supernatant to obtain coal flotation Use biodiesel. After analysis, the fatty acid methyl ester content in the biodiesel was 64.1%, the diglyceride fatty acid ester content was 10.0%, the glycerol mono fatty acid ester content was 23.9%, and the triglyceride fatty acid ester content was ...

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Abstract

The invention discloses biodiesel for coal flotation and a preparation method of the biodiesel and belongs to the technical fields of utilization of waste oil, preparation of biodiesel and preparation and application of coal flotation agents. The biodiesel is characterized in that the content of fatty acid methyl ester in the biodiesel is higher than 63%, the content of fatty acid monoglyceride is lower than 25%, the content of diglyceride is lower than 10%, and the content of triglyceride is lower than 2%. The preparation method comprises the steps that waste oil serves as a raw material, SO42 is loaded through mesopore silicon oxide, mesopore zirconium oxide or porous zirconium oxide, the biodiesel is obtained by catalytic esterification, and the biodiesel can serve as a flotation agent used in coal flotation. The waste oil serves as a raw material in preparation of the biodiesel. The biodiesel is used in the coal flotation, the production cost of the flotation agent can be reduced greatly, a new purpose of the biodiesel is developed, and the biodiesel is non-toxic and innocuous, capable of degrading biologically and is an effective coal flotation agent.

Description

technical field [0001] The invention relates to a biodiesel for coal flotation and a preparation method thereof, which belong to the fields of utilization of waste oil, preparation of biodiesel, and preparation and application of coal flotation agents. Specifically, it relates to a method for preparing biodiesel for coal flotation by utilizing waste oil through catalytic esterification of a mesoporous superacid material. Background technique [0002] Coal flotation is to separate clean coal from mineral ash by flotation agent, so as to obtain high-quality clean coal. At present, the flotation agents used in the coal preparation industry are generally petroleum-based kerosene or diesel oil as collectors and secondary octanol foaming agents. The flotation effect is evaluated by the yield of clean coal and the ash content of clean coal. Due to the shortage of petroleum resources, the use of petroleum-based diesel or kerosene as a flotation agent not only increases the producti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/008C11C3/10C10L1/02
CPCY02E50/13Y02E50/10
Inventor 李瑞丰张继龙于峰马静红张琪王会刚王向涛
Owner TAIYUAN UNIV OF TECH
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