CN102249873A - Method for improving alcohol dehydrogenation conversion rate - Google Patents
Method for improving alcohol dehydrogenation conversion rate Download PDFInfo
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- CN102249873A CN102249873A CN201110210387XA CN201110210387A CN102249873A CN 102249873 A CN102249873 A CN 102249873A CN 201110210387X A CN201110210387X A CN 201110210387XA CN 201110210387 A CN201110210387 A CN 201110210387A CN 102249873 A CN102249873 A CN 102249873A
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- alcohol
- transformation efficiency
- alcohol dehydrogenase
- reaction
- conversion rate
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Abstract
The invention relates to a method for improving alcohol dehydrogenation conversion rate. The method for improving the alcohol dehydrogenation conversion rate comprises the following steps of: feeding alcohol and adding at least one thinner into a reaction system to prepare ketone and hydrogen; and cooling alcohol and ketone after the reaction is finished. The alcohol dehydrogenation process is simple and convenient for operation, and the conversion rate of the alcohol is obviously higher than that of the conventional alcohol dehydrogenation process.
Description
Technical field
The present invention relates to a kind of method that improves the alcohol dehydrogenase transformation efficiency, belong to technical field of organic synthesis.
Background technology
It is the very important Industrial processes of a class that alcohol dehydrogenase prepares corresponding ketone, and for example dehydrogenation of isopropanol prepares acetone, and sec-butyl alcohol dehydrogenizing prepares methylethylketone, and cyclohexanol dehydrogenation prepares pimelinketone etc.Most of alcohol dehydrogenase prepares ketone and adopts CuO-ZnO-Al
2O
3Catalyzer.For example Chinese invention patent CN100360228C and CN1101262C disclose CuO-ZnO-Al respectively
2O
3Sec-butyl alcohol dehydrogenizing prepares the methylethylketone catalyzer; Chinese invention patent CN101757922A discloses a kind of CuO-ZnO-Al
2O
3Cyclohexanol dehydrogenation prepares cyclohexanone catalyst etc.More than reaction is all carried out under gas phase condition, adopts pure pure charging, and reaction produces corresponding ketone and hydrogen.Owing to be subjected to the influence of reactant in catalyst surface absorption, activity of such catalysts can not be effectively played, make that the per pass conversion of alcohol is lower.
Summary of the invention
The present invention is directed to the existing lower deficiency of alcohol dehydrogenase transformation efficiency, a kind of method that improves the alcohol dehydrogenase transformation efficiency is provided.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of method that improves the alcohol dehydrogenase transformation efficiency may further comprise the steps: at first, in pure charging, add at least a thinner again and enter reactive system system ketone and hydrogen together; Then, after reaction finishes, pure and mild ketone is cooled down.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described when charging, the mol ratio between thinner and the alcohol is 0.1～100.
Further, the reaction pressure of described reactive system is 0.01MPa～10MPa, and temperature of reaction is at 100 ℃～600 ℃.
Further, described thinner is N
2, H
2, He, Ar, Ne, CH
4, C
2H
6Perhaps C
3H
8
Further, described alcohol comprise carbonatoms at 3～15 Fatty Alcohol(C12-C14 and C12-C18) and carbonatoms at 7～15 aromatic alcohol.
The invention has the beneficial effects as follows: alcohol dehydrogenase technology of the present invention is simple, is convenient to operation, and its pure transformation efficiency is apparently higher than existing alcohol dehydrogenase technology.
Embodiment
Below principle of the present invention and feature are described, institute gives an actual example and only is used to explain the present invention, is not to be used to limit scope of the present invention.
Embodiment 1
CN1289753 prepares CuO-ZnO-Al according to Chinese invention patent
2O
3Sec-butyl alcohol dehydrogenizing prepares the methylethylketone catalyst A, carries out the sec-butyl alcohol dehydrogenizing reaction then under 240 ℃ and normal pressure, and the liquid air speed of sec-butyl alcohol is controlled at 4h
-1, use N
2As thinner, the raw materials components mole ratio of nitrogen and sec-butyl alcohol is 5.After reaction finishes, by cooling and isolating sec-butyl alcohol and methylethylketone.The per pass conversion of sec-butyl alcohol is 80.2%, methylethylketone selectivity 99.1%.
Embodiment 2
CN101757922A prepares CuO-ZnO-Al according to Chinese invention patent
2O
3Cyclohexanol dehydrogenation prepares cyclohexanone catalyst B, carries out the cyclohexanol dehydrogenation reaction then under 260 ℃ and normal pressure, and the liquid air speed of hexalin is controlled at 4h
-1, as thinner, the raw materials components mole ratio of helium and hexalin is 10 with He.After reaction finishes, by cooling and isolating hexalin and pimelinketone.The per pass conversion of hexalin is 70.7%, pimelinketone selectivity 99.2%.
The comparative example 1
CN1289753 prepares CuO-ZnO-Al according to Chinese invention patent
2O
3Sec-butyl alcohol dehydrogenizing prepares the methylethylketone catalyst A, carries out the sec-butyl alcohol dehydrogenizing reaction then under 240 ℃ and normal pressure, and the liquid air speed of sec-butyl alcohol is controlled at 4h
-1After reaction finishes, by cooling and isolating sec-butyl alcohol and methylethylketone.The per pass conversion of sec-butyl alcohol is 71.1%, methylethylketone selectivity 98.8%.
The comparative example 2
CN101757922A prepares CuO-ZnO-Al according to Chinese invention patent
2O
3Cyclohexanol dehydrogenation prepares cyclohexanone catalyst B, carries out the cyclohexanol dehydrogenation reaction then under 260 ℃ and normal pressure, and the liquid air speed of hexalin is controlled at 4h
-1After reaction finishes, by cooling and isolating hexalin and pimelinketone.The per pass conversion of hexalin is 61.7%, pimelinketone selectivity 98.2%.
Above data declaration, the alcohol conversion of alcohol dehydrogenase technology of the present invention is apparently higher than existing alcohol dehydrogenase technology.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a method that improves the alcohol dehydrogenase transformation efficiency is characterized in that, said method comprising the steps of: at first, in pure charging, add at least a thinner again and enter reactive system system ketone and hydrogen together; Then, after reaction finishes, pure and mild ketone is cooled down.
2. the method for raising alcohol dehydrogenase transformation efficiency according to claim 1 is characterized in that, and is described when charging, and the mol ratio between thinner and the alcohol is 0.1～100.
3. the method for raising alcohol dehydrogenase transformation efficiency according to claim 1 is characterized in that, the reaction pressure of described reactive system is 0.01MPa～10MPa, and temperature of reaction is at 100 ℃～600 ℃.
4. the method for raising alcohol dehydrogenase transformation efficiency according to claim 1 is characterized in that, described thinner is N
2, H
2, He, Ar, Ne, CH
4, C
2H
6Perhaps C
3H
8
5. the method for raising alcohol dehydrogenase transformation efficiency according to claim 1 is characterized in that, described alcohol comprise carbonatoms at 3～15 Fatty Alcohol(C12-C14 and C12-C18) and carbonatoms at 7～15 aromatic alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110210387XA CN102249873A (en) | 2011-07-26 | 2011-07-26 | Method for improving alcohol dehydrogenation conversion rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110210387XA CN102249873A (en) | 2011-07-26 | 2011-07-26 | Method for improving alcohol dehydrogenation conversion rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102249873A true CN102249873A (en) | 2011-11-23 |
Family
ID=44977488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110210387XA Pending CN102249873A (en) | 2011-07-26 | 2011-07-26 | Method for improving alcohol dehydrogenation conversion rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102249873A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039578A (en) * | 1988-07-11 | 1990-02-14 | 亨克尔两合股份公司 | Aliphatics 1, a kind of dehydriding of 2-glycol |
| CN1289753A (en) * | 1999-09-29 | 2001-04-04 | 中国石油化工集团公司 | Process for preparing ketone by dehydrogenating para-alcohol |
-
2011
- 2011-07-26 CN CN201110210387XA patent/CN102249873A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039578A (en) * | 1988-07-11 | 1990-02-14 | 亨克尔两合股份公司 | Aliphatics 1, a kind of dehydriding of 2-glycol |
| CN1289753A (en) * | 1999-09-29 | 2001-04-04 | 中国石油化工集团公司 | Process for preparing ketone by dehydrogenating para-alcohol |
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Application publication date: 20111123 |