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Water-in-oil type emulsified gasoline

An emulsified gasoline, water-in-oil type technology, applied in the field of fuel oil for internal combustion engines, can solve the problems of complex preparation work, thermodynamic instability, and a wide variety of emulsifier raw materials, and achieve small and uniform particle size, stable emulsification effect, and excellent anti-corrosion. The effect of external disturbance performance

Inactive Publication Date: 2010-07-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the density of gasoline is smaller than that of heavy oil, diesel oil and methanol gasoline, the density difference between it and water is larger than that of the latter three, which makes the emulsion between it and water more unstable thermodynamically, so the patent application for emulsified gasoline is not many
Until the present invention proposes, there is following defect in existing invention about emulsified gasoline: 1, the used raw material variety of emulsifying agent is various, and preparation work is complicated
Therefore, no emulsified gasoline has really been adopted by users so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Blend Span 80 and Tween 80 into a complex emulsifier with an HLB value of 9. Add 8.45 grams of water in 76.05 grams of gasoline, then add 15 grams of composite emulsifier and 0.5 gram of long-chain α-olefin amphiphilic graft copolymer (preparation method is referring to CN 101157759A, α-olefin unit is 1-dodecene, The number average molecular weight is 1.74×10 4 , the content of Polyethylene Glycol is 11.9%), finally with the high-speed shear dispersing emulsifier, stir at 10000 rev / min rotating speeds for 5 minutes to obtain emulsified gasoline. When the emulsified gasoline was stored at 25°C for 63 days, there was no oil-water separation, no gum and sediment. The diameter of water droplets in emulsified gasoline is 263 nanometers. Storage at 40°C for 5 days without oil-water separation. When centrifuged at 15,000 rpm, no oil-water separation will occur within 135 minutes.

Embodiment 2

[0024] Blend Span 80 and OP10 into a complex emulsifier with an HLB value of 9. Add 8.45 grams of water in 76.05 grams of gasoline, then add 15 grams of composite emulsifier and 0.5 gram of long-chain α-olefin amphiphilic graft copolymer (preparation method is referring to CN 101157759A, α-olefin unit is 1-dodecene, number The average molecular weight is 1.74×10 4 , the content of Polyethylene Glycol is 11.9%), finally with the high-speed shear dispersing emulsifier, stir at 10000 rev / min rotating speeds for 5 minutes to obtain emulsified gasoline. When the emulsified gasoline is stored at 25°C for 60 days, no oil-water separation occurs, and there is no gum and sediment. The diameter of water droplets in emulsified gasoline is 1854 nanometers. Storage at 40°C for 5 days without oil-water separation. When centrifuged at 15,000 rpm, no oil-water separation will occur within 130 minutes.

Embodiment 3

[0026] Blend Span 80 and Tween 80 into a complex emulsifier with an HLB value of 9. Add 8.45 grams of water in 76.05 grams of gasoline, then add 15 grams of composite emulsifier and 0.5 gram of long-chain α-olefin amphiphilic graft copolymer (preparation method is referring to CN 101157759A, α-olefin unit is 1-dodecene, number average The molecular weight is 2.1×10 4 , the content of Polyethylene Glycol is 34.0%), finally with high-speed shear dispersion emulsifier at 10000 rev / min speed of rotation, stir for 5 minutes to obtain emulsified gasoline. When the emulsified gasoline is stored at 25°C for 87 days, there is no oil-water separation, no gum and sediment. The diameter of water droplets in emulsified gasoline is 228 nanometers. No oil-water separation occurred when stored at 40°C for 8 days. When centrifuged at 15,000 rpm, no oil-water separation will occur within 200 minutes.

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Abstract

The invention discloses water-in-oil type emulsified gasoline and a preparation method thereof. Span 80 and OP10 or Tween 80 are used as a compound emulsifier the hydrophile-lipophile balance (HLB) value of which is 9, and a long-chain alpha-olefin amphiphilic graft copolymer is used as a dispersant, wherein the preparation method of the long-chain alpha-olefin amphiphilic graft copolymer refers to 101157759A. The water-in-oil type emulsified gasoline comprises the following components in percentage by weight: 0.5-1 percent of long-chain alpha-olefin amphiphilic graft copolymer, 5-15 percent of compound emulsifier, 5-20 percent of water and the balance of gasoline. The preparation method comprises the steps of sequentially adding water, the compound emulsifier and the long-chain alpha-olefin amphiphilic graft copolymer in gasoline, and stirring the mixture for 5-10 minutes with a high-speed shearing and dispersing emulsifying machine under the rotate speed of 10,000 rpm. The emulsified gasoline provided in the invention is very stable, oil-water separation can not occur within 60 days when the emulsified gasoline is stored under 25 DEG C, oil-water separation can not occur within 5 days when the emulsified gasoline is stored under 40 DEG C, and oil-water separation can not occur within at least 130 minutes when the emulsified gasoline is centrifuged under the rotate speed of 15,000 rpm. The water-in-oil type emulsified gasoline has very good practical value.

Description

technical field [0001] The invention relates to fuel oil for internal combustion engines, in particular to a water-in-oil emulsified gasoline. Background technique [0002] Fuel mainly comes from non-renewable fossil fuels. With the decrease of fossil fuels, it is necessary to increase the combustion rate of fuel and reduce fuel consumption. In addition, harmful substances produced by fuel combustion exhaust have become the biggest public hazard of air pollution in major cities around the world. In order to save energy and reduce consumption, protect people's physical and mental health, and reduce carbon dioxide emissions to prevent global warming, the greening of fuel oil has become an important issue that needs to be solved urgently. Emulsified oil technology began in 1913, when Professor HopKinson of Cambridge University tried for the first time the experiment of mixing water in internal combustion engine oil. The currently accepted combustion mechanism of emulsified fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C10L1/195C10L1/198C10L1/19
Inventor 傅智盛范志强刘敏徐君庭王齐
Owner ZHEJIANG UNIV
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