CN102381937A - Dehydration method for multi-carbon alcohol - Google Patents
Dehydration method for multi-carbon alcohol Download PDFInfo
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- CN102381937A CN102381937A CN2011102509243A CN201110250924A CN102381937A CN 102381937 A CN102381937 A CN 102381937A CN 2011102509243 A CN2011102509243 A CN 2011102509243A CN 201110250924 A CN201110250924 A CN 201110250924A CN 102381937 A CN102381937 A CN 102381937A
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Abstract
The invention discloses a dehydration method for multi-carbon alcohol. The method includes the steps of measuring water content n% of water-contained multi-carbon alcohol, calculating additive amount of aluminum isopropoxide according to 3.7XwXn% (w referring to mass of the water-contained multi-carbon alcohol), adding aluminum isopropoxide into the water-contained multi-carbon alcohol, sampling after stirring for half to an hour, analyzing moisture content of a sample and measuring potential of hydrogen of the sample. The dehydration reaction is completed when the water content is lower than 0.3% and the sample is not alkalic, aluminum isopropoxide of quantity calculated according to 3.7*w*n% needs to be added if the water content is higher than 0.3%, multi-carbon alcohol of mass which is 1% of that of the original multi-carbon alcohol needs to be added if the sample is alkalic, undissolved substances are filtered and removed after stirring from half an hour, and the obtained liquid can be used as methanol gasoline additive. The high-water-content multi-carbon alcohol treated by the dehydration method can be used as methanol gasoline additive.
Description
Technical field
The present invention relates to methanol gasoline additive for vehicles, particularly relate to the dewatering of methanol gasoline additive for vehicles.Dewatering of the present invention can be reduced to 0.001～0.3% with the moisture in the higher alcoholses such as commercially available potato spirit, secondary octanol, enables to use as the additive of Vehicular methanol petrol.
Background technology
The world energy sources reserves are shortage day by day, and environmental problem is serious day by day, and the energy and environmental problem have caused the great attention of countries in the world, and therefore, seeking new cleaning substitute energy has become global problem.The positive high speed development of China's economy, surplus the automobile pollution 7,000 ten thousand at present, the annual oil major part that consumes needs import, and the energy and environmental problem are restricting China's rapid economy development.China belongs to oil-poor weak breath but the country of relative rich coal, and it is fully feasible substituting the part oil with coal system methyl alcohol.
Methyl alcohol has following characteristics as good alternative fuel: 1. aboundresources, and price is suitable, satisfies the large-scale promotion needs; 2. fuel value, especially heat vale of mixture can satisfy combustion engine powered performance requriements; 3. help reducing discharge of poisonous waste; 4. can satisfy aspect requirements such as vehicle launch performance, rideability and acceleration characteristics; Energy density higher, the storage convenient transportation; 6. need not change mover, art recognized; 7. existing fuel, accumulating distribution system can be used.Low ratio is mixed the methanol gasoline (methanol content 10～20%) of burning through pilot conversion, can adapt to the use of vehicle fully, and discharge of poisonous waste is lower by 35% than pure gasoline, is a kind of ideal abrasive property motor spirit substitute.
Yet the easy Yin Wendu of methanol gasoline reduces and causes layering, makes that vehicle can not stable burning.This problem is seriously restricting methanol gasoline particularly popularization of northern area in the whole nation.General solution is in methanol gasoline, to add the solubility promoter higher alcohols at present, so that fuel methanol and organic the mixing of gasoline component oil, not stratified not emulsification, the dynamic property of enhancing methanol gasoline.
The moisture content of commercially available higher alcohols (like potato spirit, secondary octanol) is many 3～5%, and high moisture content makes it not obvious as methanol gasoline additive Use Limitation fruit, even plays opposite effect.This problem has seriously restricted this series products as the application of additive on methanol gasoline.
Summary of the invention
The object of the present invention is to provide a kind of dewatering of higher alcohols, the high moisture higher alcohols after handling through dewatering of the present invention can be used as methanol gasoline additive.
Higher alcohols dewatering provided by the invention may further comprise the steps:
1), determines the water cut n% of moisture higher alcohols;
2), calculate the addition of aluminum isopropylate according to 3.7 * w * n%, aluminum isopropylate is added in the moisture higher alcohols, stir 0.5～1h, wherein, w is the quality of moisture higher alcohols, and n% is the water cut of moisture higher alcohols;
3), sampling, analytic sample moisture content and working sample acid-basicity, moisture content is not more than 0.3%, does not show alkalescence expression dehydration reaction and accomplishes; If moisture content is higher than 0.3%, then set by step 2) formula calculates and replenishes the aluminum isopropylate amount and add aluminum isopropylate; If sample shows alkalescence, then add higher alcohols by 1% higher alcohols quality, restir 0.5h gets final product;
4), reaction mixture is removed by filter insolubles, gained liquid promptly can be used as methanol gasoline additive.
Among the present invention, it is 3～8 that the molecule of said higher alcohols contains carbon number, can be to mix higher alcohols, and also can be the higher alcohols of one-component.The water cut of moisture higher alcohols should be not more than 5%.
The aluminum isopropylate content that uses among the present invention should be not less than 98%.
Among the present invention, unless otherwise indicated, described percentage composition is the quality percentage composition.
Higher alcohols dewatering provided by the invention is comparatively thorough to the higher alcohols dehydration, has widened the product application space; Dewatering technology of the present invention is simple, and less investment need not the higher molecular sieve dehydration equipment of input price, exempts complicated molecular sieve last handling process, need not invest the construction rectifying device, whole technological process environmentally safe; Higher alcohols through after the inventive method processing can be used for methanol gasoline additive fully.
Embodiment
Embodiment 1.
The water cut that determines the moisture potato spirit of being purchased with the method for GB/T 6283-2008 " the mensuration karl Fischer method (universal method) of Chemicals moisture content " regulation is 3.5%.
In stirring tank, add the moisture potato spirit of 100kg, add aluminum isopropylate 12.9kg, open stirring apparatus for reaction kettle, stir 45min.
Sampling, moisture content 0.45% in the analytic sample, and it is neutral that detection paper shows.
Add aluminum isopropylate 1.1kg again, sampling analysis behind the stirring 0.5h, it is neutral that specimen is, water cut 0.15%.
Stop to stir, the mixture in the reaction kettle is emitted, remove by filter insolubles, obtain potato spirit 103kg, impurity screening 2.1kg.
Collect the solid impurity that filtering separation obtains for sale.
Embodiment 2.
The water cut that determines the moisture secondary octanol of being purchased with the method for GB/T 6283-2008 " the mensuration karl Fischer method (universal method) of Chemicals moisture content " regulation is 5.0%.
In stirring tank, add the moisture secondary octanol of 1000kg, add aluminum isopropylate 185kg, open stirring apparatus for reaction kettle, stir 45min.
Sampling, moisture content 0.006% in the analytic sample, and detection paper shows alkalescence.
Add secondary octanol 10kg again, sampling analysis behind the stirring 0.5h, it is neutral that specimen is, water cut 0.02%.
Stop to stir, the mixture in the reaction kettle is emitted, remove by filter insolubles, obtain secondary octanol 1100kg, impurity screening 20.7kg.
Collect the solid impurity that filtering separation obtains for sale.
Claims (3)
1. the dewatering of higher alcohols may further comprise the steps:
1), determines the water cut n% of moisture higher alcohols;
2), calculate the addition of aluminum isopropylate according to 3.7 * w * n%, aluminum isopropylate is added in the moisture higher alcohols, stir 0.5～1h, wherein, w is the quality of moisture higher alcohols, and n% is the water cut of moisture higher alcohols;
3), sampling, analytic sample moisture content and working sample acid-basicity, moisture content is not more than 0.3%, does not show alkalescence expression dehydration reaction and accomplishes; If moisture content is higher than 0.3%, then set by step 2) formula calculates and replenishes the aluminum isopropylate amount and add aluminum isopropylate; If sample shows alkalescence, then add higher alcohols by 1% higher alcohols quality, restir 0.5h gets final product;
4), reaction mixture is removed by filter insolubles, gained liquid promptly can be used as methanol gasoline additive.
2. the dewatering of higher alcohols according to claim 1, it is 3～8 that the molecule that it is characterized in that said higher alcohols contains carbon number.
3. the dewatering of higher alcohols according to claim 1 is characterized in that the water cut of said higher alcohols is not more than 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102509243A CN102381937A (en) | 2011-08-30 | 2011-08-30 | Dehydration method for multi-carbon alcohol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102509243A CN102381937A (en) | 2011-08-30 | 2011-08-30 | Dehydration method for multi-carbon alcohol |
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| Publication Number | Publication Date |
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| CN102381937A true CN102381937A (en) | 2012-03-21 |
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| CN2011102509243A Pending CN102381937A (en) | 2011-08-30 | 2011-08-30 | Dehydration method for multi-carbon alcohol |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4874474A (en) * | 1987-04-02 | 1989-10-17 | Snamprogetti S.P.A. | Process for dehydrating a mixture of methanol and higher alcohols |
| CN1800316A (en) * | 2006-01-11 | 2006-07-12 | 陈庆福 | Preparation method of special additive CQF for methanol gasoline and methanol gasoline preparation |
| CN1827751A (en) * | 2005-12-09 | 2006-09-06 | 叶有明 | High-cleaness methanol gasoline and preparation method thereof |
| CN101285011A (en) * | 2008-06-11 | 2008-10-15 | 重庆大学 | Water and methanol-bearing gasoline and method for preparing same |
| CN101402890A (en) * | 2008-11-12 | 2009-04-08 | 王宇 | Methanol gasoline additive and process for producing methanol gasoline |
-
2011
- 2011-08-30 CN CN2011102509243A patent/CN102381937A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4874474A (en) * | 1987-04-02 | 1989-10-17 | Snamprogetti S.P.A. | Process for dehydrating a mixture of methanol and higher alcohols |
| CN1827751A (en) * | 2005-12-09 | 2006-09-06 | 叶有明 | High-cleaness methanol gasoline and preparation method thereof |
| CN1800316A (en) * | 2006-01-11 | 2006-07-12 | 陈庆福 | Preparation method of special additive CQF for methanol gasoline and methanol gasoline preparation |
| CN101285011A (en) * | 2008-06-11 | 2008-10-15 | 重庆大学 | Water and methanol-bearing gasoline and method for preparing same |
| CN101402890A (en) * | 2008-11-12 | 2009-04-08 | 王宇 | Methanol gasoline additive and process for producing methanol gasoline |
Non-Patent Citations (3)
| Title |
|---|
| 李齐春等: "异丙醇铝工业化生产的控制", 《精细与专用化学品》 * |
| 王瑜: "甲醇汽油的发展", 《中国高新技术企业》 * |
| 郑斯峒等: "异丙醇铝加水分解", 《硅酸盐通报》 * |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120321 |