CN103666591A - Preparation method for methanol gasoline with good stability - Google Patents

Abstract

The invention provides a preparation method for methanol gasoline with good stability, and belongs to the technical field of synthetic fuels. The preparation method comprises the following steps: steps one, putting heavy benzol, alkyl naphthalene, amyl nitrate, sodium biphosphate, ethylene-vinyl acetate copolymer, light diesel oil, tebutate peroxide, 70# gasoline, a dispersing agent, and a metal deactivator into a reactor and stirring to obtain a mixture; adding methanol into the mixture, cooling down, stirring continuously, and standing to obtain the methanol gasoline. The methanol gasoline provide by the invention has good burning performance, and is not changed in performance and has no sediments after being placed for a long time.

Description

A kind of preparation method of methanol gasoline of good stability

 

Technical field

The invention provides a kind of preparation method of methanol gasoline, belong to synthol technical field.

 

Background technology

The workable reserve of the domestic coal of China is about 7,000 hundred million tons of standards, by 30 ~ 4,000,000,000 tons of standard coals of national energy year aggregate demand, calculates, and can also utilize about 200 years.According to Ministry of Land and Resources's information, within 2007, China's oil residual recoverable reserves is approximately 20.43 hundred million tons; By current 1.23 ~ 1.7 hundred million tons/year, produce exploitation, can adopt at most 26 years.To domestic petroleum about the year two thousand thirty, will face exhaustion.2009, comprise that CNPC's net importation amount of crude oil, processed oil, liquefied petroleum gas (LPG) and other petroleum productss reaches 2.18 hundred million tons, increase by 8.8% on a year-on-year basis; Crude oil import amount breaks through 200,000,000 tons first, reaches 2.03 hundred million tons, increases by 13.9% than last year; Import interdependency reaches 52%, has touched energy security barrier line.To the end of the year 2009, China's automobile pollution has reached more than 7,619 ten thousand, compares with last year, increases more than 1,152 ten thousand, increases by 17.8%.Vehicle fuel is the topmost Application Areas of oil, accounts for the more than 70% of Global Oil total flow.Vehicle fuel is the topmost consumer field of oil, and solving the alternative of vehicle fuel is the important component part of tackling global energy shortage a middle or short term.

< < points out about the instruction > > of development substitute energy: the developing goal of substitute energy is: win the year two thousand twenty, new and renewable sources of energy accounts for the more than 20% of China's primary energy source total quantity consumed; Dependence on foreign countries for oil is controlled at 55% left and right; Using coal methyl alcohol processed and dme as 20 ~ 30 years from now on transitional vehicle alternative fuels; Suit measures to local conditions to promote the use of vehicle alcohol ether fuel, implement energy diversification and energy substitution strategy.

Methyl alcohol achromaticity and clarification liquid, irritant smell.Micro-have an alcohol like smell, volatile, easily flow, during burning, smokelessly there is blue flame, can dissolve each other with organic solvents such as water, alcohol, ethers, can form azeotropic mixture with multiple compounds, can to form solvent miscible with multiple compounds, solubility property is better than ethanol, can dissolve plurality of inorganic salt class, as sodium iodide, calcium chloride, ammonium nitrate, copper sulfate, Silver Nitrate, ammonium chloride and sodium-chlor etc.

Methyl alcohol is as the characteristic of fuel: first, owing to containing aerobic in alkanol molecule, calculate by mass, methyl alcohol contains 50% oxygen, thereby the required air capacity of methyl alcohol perfect combustion is than gasoline much less, the heat that the tail gas that burning produces is taken away loss also correspondingly reduces, and so just makes engine overall thermal efficiency be improved, and the pollution level causing after burning is lighter than gasoline.The second, alcohols calorific value is lower, and methanol quality calorific value only has 45.5% of gasoline, therefore, virtual mass specific fuel oil consumption at Aalcohols fuel is high, Aalcohols fuel under equal thermo-efficiency, its needed value when required excess air ratio is much smaller than fuel oil gasoline during perfect combustion in cylinder.The 3rd, the latent heat of vaporization of methyl alcohol is 3 times of left and right of gasoline, and the high latent heat of vaporization and low vapour pressure will cause gas mixture to form and starting difficulty, but can make inlet air temperature further reduce, and improve charging efficiency; Because the latent heat of vaporization of methyl alcohol is large, can improve the cooling conditions of burning rear engine inside simultaneously, improve the dynamic property of engine, reduce exhaust temperature.The 4th, alcohols has higher octane value, has higher knock resistance, to by improving engine compresses, recently to improve the thermo-efficiency of engine very favourable, is therefore good petrol motor fuel substitute, is also the good additive that improves gasoline octane rating.The methanol mixed of regular gasoline 15 ~ 20%, octane value can reach the level of premium.

But it is bad that methanol gasoline exists stability, the long-term problem that is prone to precipitation of placing.

 

Summary of the invention

The object of the invention is: a kind of good stability, high-performance methanol gasoline are provided, and concrete technical scheme is:

A preparation method for the methanol gasoline of good stability, comprises the steps:

The 1st step, by weight, 1～3 part of 3～5 parts of heavy benzol, 2～4 parts of alkylnaphthalenes, 1～3 part of amyl nitrate, 1～3 part of SODIUM PHOSPHATE, MONOBASIC, 4～6 parts of ethylene-vinyl acetate copolymers, 15～20 parts of solar oils, 5～10 parts, 1～3 part, No. 70 gasoline of peroxidation tebutate, 2～3 parts of dispersion agents, metal passivator is put into reactor, at 30～40 ℃, stir 4～6 hours, obtain compound;

The 2nd step by weight, adds 60～80 parts of methyl alcohol in compound again, is cooled to 20～25 ℃, continue to stir 2～3 hours, and standing 10～12 hours.

Described dispersion agent is succimide preferably.

Described metal passivator is adipic dihydrazide preferably.

 

beneficial effect

Methanol gasoline provided by the invention, has good combustionproperty, and in addition, it is after long-term placement, and character does not change, without precipitation, produces.

 

Embodiment

 

Embodiment 1

A preparation method for the methanol gasoline of good stability, comprises the steps:

The 1st step, heavy benzol 3Kg, alkylnaphthalene 2Kg, amyl nitrate 1Kg, SODIUM PHOSPHATE, MONOBASIC 1Kg, ethylene-vinyl acetate copolymer 4Kg, solar oil 15Kg, peroxidation tebutate 1Kg, No. 70 gasoline 5Kg, dispersion agent 2Kg, metal passivator 1Kg are put into reactor, at 30 ℃, stir 4 hours, obtain compound;

The 2nd step adds methyl alcohol 60Kg in compound again, is cooled to 20 ℃, continue to stir 2 hours, and standing 10 hours.

Described dispersion agent is succimide.Described metal passivator is adipic dihydrazide.

 

Embodiment 2

A preparation method for the methanol gasoline of good stability, comprises the steps:

The 1st step, heavy benzol 5Kg, alkylnaphthalene 4Kg, amyl nitrate 3Kg, SODIUM PHOSPHATE, MONOBASIC 3Kg, ethylene-vinyl acetate copolymer 6Kg, solar oil 20Kg, peroxidation tebutate 3Kg, No. 70 gasoline 10Kg, dispersion agent 3Kg, metal passivator 3Kg are put into reactor, at 40 ℃, stir 6 hours, obtain compound;

The 2nd step adds methyl alcohol 80Kg in compound again, is cooled to 25 ℃, continue to stir 3 hours, and standing 12 hours.

Described dispersion agent is succimide.Described metal passivator is adipic dihydrazide.

 

Embodiment 3

A preparation method for the methanol gasoline of good stability, comprises the steps:

The 1st step, heavy benzol 4Kg, alkylnaphthalene 3Kg, amyl nitrate 2Kg, SODIUM PHOSPHATE, MONOBASIC 2Kg, ethylene-vinyl acetate copolymer 5Kg, solar oil 17Kg, peroxidation tebutate 2Kg, No. 70 gasoline 7Kg, dispersion agent 2Kg, metal passivator 2Kg are put into reactor, at 35 ℃, stir 5 hours, obtain compound;

The 2nd step adds methyl alcohol 70Kg in compound again, is cooled to 22 ℃, continue to stir 2 hours, and standing 11 hours.

Described dispersion agent is succimide.Described metal passivator is adipic dihydrazide.

 

Performance test

According to above test, show, this methanol gasoline meets the standard of 93# gasoline completely, can travelling for general-utility car and other vehicle.

The methanol gasoline that above embodiment is prepared carries out stability test, at-20 ℃, 0 ℃, 20 ℃, places respectively 6 months, in oil product, without precipitation, produces, and during for the fuel of vehicle, vehicle can normally occur and travel, oil product good stability.

Claims (3)

1. a preparation method for the methanol gasoline of good stability, is characterized in that, comprises the steps:

The 1st step, by weight, 1～3 part of 3～5 parts of heavy benzol, 2～4 parts of alkylnaphthalenes, 1～3 part of amyl nitrate, 1～3 part of SODIUM PHOSPHATE, MONOBASIC, 4～6 parts of ethylene-vinyl acetate copolymers, 15～20 parts of solar oils, 5～10 parts, 1～3 part, No. 70 gasoline of peroxidation tebutate, 2～3 parts of dispersion agents, metal passivator is put into reactor, at 30～40 ℃, stir 4～6 hours, obtain compound;

The 2nd step by weight, adds 60～80 parts of methyl alcohol in compound again, is cooled to 20～25 ℃, continue to stir 2～3 hours, and standing 10～12 hours.

2. the preparation method of the methanol gasoline of good stability according to claim 1, is characterized in that: described dispersion agent is succimide.

3. the preparation method of the methanol gasoline of good stability according to claim 1, is characterized in that: described metal passivator is adipic dihydrazide.