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Preparation methods of diesel microemulsion and micro-emulsified diesel oil

A micro-emulsion and micro-emulsion technology, used in the petroleum industry, liquid carbon-containing fuels, fuels, etc., can solve the problems of unfavorable storage and transportation, easy generation of gums, complicated preparation process, etc., and reduce carbon deposits and tail gas emissions. , improve the stability, the effect of simple preparation

Inactive Publication Date: 2013-01-16
EAST CHINA UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

The microemulsion fuel oil disclosed by Chinese application number 200910231033.6 and Chinese patent publication number CN101348739A has good stability, and the microemulsion can be applied to diesel oil and gasoline, but metal ions such as potassium and sodium, elemental sulfur, halogen and corrosive substances have been introduced
[0005] (2) The amount of microemulsion is large and the amount of water is less, resulting in higher cost of microemulsion fuel, which is not conducive to the application and promotion of microemulsion technology
[0006] (3) Microemulsion has high nitrogen content, which is not conducive to reducing NOx emissions, and will also have adverse effects on equipment
Although 12% of additives and 30% of solubilizing water solve the problem of more additives and less water, but the content of nitrogen in the additives is high, which is not conducive to reducing NOx emissions, and will also aggravate equipment corrosion and wear
Chinese Patent Publication No. CN1560200A relates to a kind of microemulsion diesel oil produced by petrochemical alkali refining waste water and its production method, wherein because the recovered oil is acidified and refined by concentrated sulfuric acid, 10-20% ammonia water is added, although the waste water is fully utilized, but Nitrogen content in diesel increases, which is not good for environmental protection and equipment
[0007] (4) Microemulsion raw materials are not easy to obtain, and the flash point of microemulsion is low
Microemulsion does not contain metals, halogens and other substances, and is easy to purchase, but the amount of methanol used as an auxiliary agent has a great impact on the flash point of diesel oil, which is not conducive to storage and transportation
[0008] (5) The burning process is easy to produce gum
As Chinese Patent Publication No. CN1766039A, CN101016471A all relate to a kind of microemulsion fuel oil that utilizes waste oil to prepare, although cost is low, stability is good, introduce waste oil and its extract, easily generate colloid when fuel oil burns
[0009] (6) The preparation is complicated and not suitable for industrial promotion
Chinese Patent Publication No. CN101469278A relates to a microemulsion fuel oil prepared by using quantized carbon materials and its preparation method. Although it can improve the quality of oil products and increase the fuel value, the preparation process is complicated

Method used

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Effect test

Embodiment 1

[0036] Preparation of diesel microemulsion with water content of 10.4% and microemulsified diesel oil

[0037] (1) Preparation of diesel microemulsion

[0038] In a 100ml Erlenmeyer flask, add 0.50 g of oleic acid, 00.6 g of ammonia, 800.39 g of Tween, 0.25 g of Span 80, and 1.3 g of OP-4 in sequence. Shake uniformly to completely dissolve the emulsifier.

[0039] (2) Preparation of microemulsified diesel

[0040] At room temperature, weigh 42.5g of 0# diesel oil in a 100ml Erlenmeyer flask, then take 2.5g of the above diesel microemulsion and add it to the Erlenmeyer flask, shake it evenly, add 5.24g of water while shaking, and then add 0.13g of n-pentanol, if used In the oscillating mode, a translucent diesel microemulsion will be obtained after 7 hours; if ultrasonic dispersion is performed, the ultrasonic parameters are: 40KHz, 20min, 25°C, 127W, and the translucent microemulsified diesel can be obtained by standing for 10 minutes.

Embodiment 2

[0042] Preparation of diesel microemulsion with water content of 10.0% and microemulsified diesel oil

[0043] (1) Preparation of diesel microemulsion

[0044] In a 100ml Erlenmeyer flask, add 0.55 g of oleic acid, 0.06 g of ammonia, 850.16 g of Tween, 0.23 g of Span 20, and 1.27 g of OP-4 in sequence, and shake it evenly to completely dissolve the emulsifier.

[0045] (2) Preparation of microemulsified diesel

[0046] At room temperature, weigh 42.5g of 0# diesel oil in a 100ml Erlenmeyer flask, then add the above diesel oil microemulsion into the Erlenmeyer flask, shake evenly, add 5.00g water while shaking, then add 0.18g n-pentanol, shake evenly, and finally A translucent microemulsified diesel oil is obtained.

Embodiment 3

[0048] Preparation of diesel microemulsion with water content of 10.2% and microemulsion diesel oil

[0049] (1) Preparation of diesel microemulsion

[0050] In a 100ml Erlenmeyer flask, add 0.18 g of oleic acid, 0.02 g of ethanolamine, 0.18 g of Tween 85, 0.22 g of Span 83, and 1.64 g of OP-4 in sequence. Shake uniformly to completely dissolve the emulsifier.

[0051] (2) Preparation of microemulsified diesel

[0052] At room temperature, weigh 42.5g of 0# diesel oil in a 100ml Erlenmeyer flask, then add the above diesel microemulsion into the Erlenmeyer flask, shake evenly, add 5.08g water while shaking, then add 0.10g n-pentanol, shake evenly, and finally A translucent microemulsified diesel oil is obtained.

[0053] The microemulsion prepared by the invention does not contain metal ions, halogens, sulfur elements, and other substances that are unfavorable to equipment and the environment, and belongs to oxygen-containing compounds, which is helpful for the complete combustion of mi...

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Abstract

The invention relates to preparation methods of a diesel microemulsion and micro-emulsified diesel oil. The optimum composition proportion (by mass percent) is: 84.4% of diesel oil, 5.0% of a compounded emulsifier, 0.2% of auxiliaries, and 10.4% of water. The microemulsion prepared in the invention does not contain metal ions, halogen, sulfur and other substances detrimental to equipment and the environment. Belonging to oxygenated chemicals, the microemulsion contributes to complete combustion of micro-emulsified diesel oil, thus improving the combustion efficiency. With the advantages of simple preparation and low cost, the microemulsion can be stored for a long time, is miscible with pure diesel oil within certain range, and can significantly reduce the discharge of solid particles, CO, NOx and other tail gases, thus being conducive to environmental protection.

Description

【Technical Field】 [0001] The invention relates to the technical field of diesel microemulsions, in particular to a method for preparing diesel microemulsions and microemulsified diesel. 【Background technique】 [0002] With the rapid development of industry, agriculture, and transportation, the shortage of fossil energy and the environmental pollution caused by its combustion have become more and more serious. How to efficiently use fossil energy and reduce emissions has become the primary issue of national and social concern. Fuel water mixing technology has attracted wide attention from various countries since the last century. Early research on fuel water mixing technology mainly focused on fuel emulsification, but emulsified fuel has the following drawbacks: (1) It is unstable and will change with environmental conditions and storage time. Long, oil-water separation, demulsification and other unstable phenomena occur; (2) The preparation is complicated, requires a high-power e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/222C10L1/19C10L1/198C10L1/188C10L1/185C10L1/182C10L1/12C10L1/32
Inventor 江洪波徐珊夏明思翁惠新
Owner EAST CHINA UNIV OF SCI & TECH
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