CN1371895A - Method for raising 2-methyl-2-butene content in isopentene - Google Patents
Method for raising 2-methyl-2-butene content in isopentene Download PDFInfo
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- CN1371895A CN1371895A CN 01105416 CN01105416A CN1371895A CN 1371895 A CN1371895 A CN 1371895A CN 01105416 CN01105416 CN 01105416 CN 01105416 A CN01105416 A CN 01105416A CN 1371895 A CN1371895 A CN 1371895A
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Abstract
The method for raising content of 2-methyl-2-butylene in isopentene is characterized by making the isopentene material containing 2-methyl-1-butylene and 2-methyl-2-butylene implement isomerization reaction in the presence of catalyst sulfoacid cation exchange resin so as to convert the 2-methyl-1-butylene into 2-methyl-2-butylene. The specific surface area of said sulfoacid cation exchange resin is 10-38 sq.m/g, pore volume is 0.1-0.3 ml/g, liquid time space speed is 1-35 hr. (-1), reaction temp. is 25-70 deg.C and reaction pressure is 0.3-1.0 MPa.
Description
The present invention relates to the 2-methyl-1-butene bisabolene isomer and turn to the 2-methyl-2-butene, to improve the method for 2-methyl-2-butene content in the isopentene.
Isopentene is the very high industrial chemicals of a kind of using value, is used to produce resin and pesticide intermediate etc.Isopentene has three kinds of isomerss, 3-methyl-1-butene, 2-methyl-2-butene and 2-methyl-1-butene alkene.Usually isopentene is the mixture of 2-methyl-2-butene and 2-methyl-1-butene alkene, and wherein the high more using value of the content of 2-methyl-2-butene is high more.
Isopentene mainly is present in carbon five components of catalytically cracked gasoline or the C5 fraction of petroleum cracking system ethylene by-product, owing to contain the very approaching compound of many boiling points in these carbon five components, isopentene therefrom to be separated with general separation method and to be difficult for, at present people to adopt maximum separation methods be the tert amyl methyl ether(TAME) cracking process.C5 fraction and methyl alcohol reaction generate tert amyl methyl ether(TAME), refining then high-purity methyl tert-amyl ether, the Pintsch process again of obtaining.Contain isopentene in the split product, methyl alcohol and small amount of impurities are removed methyl alcohol through water elution, and can make the high purity isopentene through rectifying.In the isopentene that obtains thus, 2-methyl-2-butene/2-methyl-1-butene alkene is generally (1～5)/1, and the content of 2-methyl-2-butene in isopentene is relatively low.
U.S. Pat 5,073,663 to have proposed a kind of be the method for 2-methyl-2-butene with the 2-methyl-1-butene bisabolene isomer, in order to improve the content of 2-methyl-2-butene in the isopentene.It is catalyzer with the acidic cation-exchange resin, and raw material is for containing a small amount of tert amyl methyl ether(TAME) and the 2-methyl-2-butene/2-methyl-1-butene alkene material for (1～5)/1, and 2-methyl-2-butene/2-methyl-1-butene alkene can be increased to (6～12)/1 in the product.This patent emphasizes that the tert amyl methyl ether(TAME) of necessary adding 5～10% is as solvent in raw material, and production process is with regard to more complicated like this.
The purpose of this invention is to provide a kind of by with the 2-methyl-1-butene bisabolene isomer being the method for 2-methyl-2-butene with 2-methyl-2-butene content in the raising isopentene, it has selected a kind ofly have the sulfonic acid Zeo-karb of suitable specific surface area and suitable pore volume as isomerization catalyst, can simplify reaction process, and can make that the ratio of 2-methyl-2-butene and 2-methyl-1-butene alkene is increased to (7～14)/1 in the product.
The present invention is achieved by the following technical solutions:
The isopentene material that will contain 2-methyl-1-butene alkene and 2-methyl-2-butene, wherein 2-methyl-2-butene/2-methyl-1-butene alkene is (1～5)/1, carry out isomerization reaction in the presence of catalyzer sulfonic acid Zeo-karb, the specific surface area of sulfonic acid Zeo-karb is 10～38m
2/ g, pore volume are 0.1～0.3ml/g, and isomerization reaction is a liquid phase reaction, and liquid hourly space velocity is 1～35hr
-1, temperature of reaction is 25～70 ℃, reaction pressure is 0.3～1.0Mpa, obtains the high-load isopentene product of 2-methyl-2-butene.
The specific surface area of described sulfonic acid Zeo-karb is preferably 15～25m
2/ g, liquid hourly space velocity is at 1～35hr
-1Scope in all can satisfy requirement of the present invention, but the contriver thinks and is preferably 5～20hr
-1In like manner, other reaction conditions is then advised: temperature of reaction is 35～55 ℃, and reaction pressure is 0.4～0.8Mpa.
The present invention is not strict to the ingredient requirement of isomerization reaction, it can be highly purified isopentene, promptly do not contain other impurity, also can contain other carbon pentaene hydrocarbon or alkane, or contain compounds such as tert amyl methyl ether(TAME), and 2-methyl-2-butene/2-methyl-1-butene alkene changes the carrying out that does not all influence isomerization reaction in the raw material in the scope of (1～5)/1, therefore, turndown ratio is bigger, usually can with the split product of tert amyl methyl ether(TAME) after water elution removes methyl alcohol directly as raw material, the ratio by 2-methyl-2-butene in the product that obtains after the isomerization reaction and 2-methyl-1-butene alkene can be increased to (7～14)/1.
Product after the isomerization generally can adopt the method for rectifying further to make with extra care, the high purity isopentene of side line output high content of 2-methyl-2-butene, the purity of isopentene can reach more than 99%, by the temperature and the reflux ratio of control rectifying tower top, the 2-methyl-2-butene content of purified product reaches as high as more than 99%.
For above-mentioned isomerization process, the sulfonic acid Zeo-karb is fit closely catalyzer, and this is known clearly by prior art.Ion exchange resin has many advantages, and it all is better than traditional acid or alkaline catalysts in many aspects.To run into such as equipment corrosion, side reaction problems such as many and environmental pollution during with water-soluble acid as catalyst, and make spent ion exchange resin then can avoid these problems.In addition, adopt ion exchange resin also can simplify lock out operation greatly, and catalyzer can use repeatedly.
It has been generally acknowledged that, the activity of resin catalyst and the pore structure of catalyst themselves have very big relation, same type catalyzer, the difference of catalyzer rerum natura aspect can in reaction, have a differing appearance because of cause catalyzer, this may be because catalyst activity is relevant at the adsorption concentration of catalyst activity position (sulfonic group) with reactant molecule, the pore structure of catalyzer has influence on the distribution of catalyst activity position, thus the carrying out of influence reaction.The contriver finds through a large amount of experiments, when the sulfonic acid Zeo-karb of having selected to have suitable specific surface area and suitable pore volume during as isomerization catalyst, the reactive behavior and the selectivity of catalyzer all increase, be embodied in the carrying out that when containing other compound in the raw material, does not influence reaction, thereby can simplify technological process, can with the split product of tert amyl methyl ether(TAME) after washing removes methyl alcohol directly as isomerized raw material, both need not original impurity in the raw material is removed, also need not to add other solvents, this has just increased turndown ratio, and this is a very attractive for industrial applications.In addition, compared with the prior art, under reaction conditions much at one, the content of 2-methyl-2-butene also improves more in the isomerization after product.
Below will come details of the present invention is further described by embodiment, in an embodiment:
2MB1 is a 2-methyl-1-butene alkene; 2MB2 is the 2-methyl-2-butene; TAME is a tert amyl methyl ether(TAME); LHSV is a liquid hourly space velocity.
Embodiment 1～16:
The isopentene material (the concrete composition of material sees Table 1) that will contain 2-methyl-1-butene alkene and 2-methyl-2-butene, in the presence of catalyzer sulfonic acid Zeo-karb, carry out isomerization reaction, so that 2-methyl-1-butene alkene is converted into the 2-methyl-2-butene, reaction mass passes through beds with liquid phase.Each embodiment catalyst system therefor sulfonic acid Zeo-karb specific surface area, physical index such as pore volume and the concrete reaction conditions of isomerization see Table 2, obtain the isopentene product of high content of 2-methyl-2-butene after the isomerization, concrete outcome sees Table 3.Table 1.
Table 2.
Table 3.
| ????2MB2 ????(％) | ????2MB1 ????(％) | ????2MB2 ????/2MB1 | Other carbon pentaene hydrocarbon impurities (%) | ????TAME ????(％) | |
| Embodiment 1 | ????62.1 | ????18.3 | ????3.4 | ????11.4 | ????8.2 |
| Embodiment 2 | ????71.3 | ????23.2 | ????2.9 | ????/ | ????5.6 |
| Embodiment 3 | ????71.1 | ????16.2 | ????4.4 | ????12.7 | ????/ |
| Embodiment 4 | ????77.7 | ????22.1 | ????3.5 | ????/ | ????/ |
| Embodiment 5 | ????71.6 | ????15.1 | ????4.7 | ????/ | ????13.3 |
| Embodiment 6 | ????71.1 | ????16.2 | ????4.4 | ????12.7 | ????/ |
| Embodiment 7 | ????58.6 | ????21.3 | ????2.8 | ????11.5 | ????8.6 |
| Embodiment 8 | ????50.1 | ????40.3 | ????1.2 | ????9.6 | ????/ |
| Embodiment 9 | ????71.1 | ????16.2 | ????4.4 | ????12.7 | ????/ |
| Embodiment 10 | ????61.5 | ????22.4 | ????2.8 | ????/ | ????16.1 |
| Embodiment 11 | ????71.1 | ????16.2 | ????4.4 | ????12.7 | ????/ |
| Embodiment 12 | ????56.0 | ????16.6 | ????3.4 | ????13.2 | ????14.2 |
| Embodiment 13 | ????66.5 | ????17.0 | ????3.9 | ????12.3 | ????4.2 |
| Embodiment 14 | ????71.1 | ????16.2 | ????4.4 | ????12.7 | ????/ |
| Embodiment 15 | ????65.2 | ????17.9 | ????3.6 | ????3.4 | ????13.5 |
| Embodiment 16 | ????71.1 | ????16.2 | ????4.4 | ????12.7 | ????/ |
| Reaction pressure (Mpa) | Temperature of reaction (℃) | ??LHSV ??(hr -1) | Specific surface area of catalyst (m 2/g) | Catalyzer pore volume (ml/g) | |
| Embodiment 1 | ????0.7 | ????35 | ????20 | ????19 | ????0.15 |
| Embodiment 2 | ????0.8 | ????35 | ????10 | ????19 | ????0.28 |
| Embodiment 3 | ????0.7 | ????35 | ????10 | ????19 | ????0.15 |
| Embodiment 4 | ????0.4 | ????35 | ????5 | ????19 | ????0.15 |
| Embodiment 5 | ????0.7 | ????35 | ????10 | ????10 | ????0.15 |
| Embodiment 6 | ????0.7 | ????35 | ????10 | ????19 | ????0.15 |
| Embodiment 7 | ????0.7 | ????45 | ????10 | ????35 | ????0.15 |
| Embodiment 8 | ????0.8 | ????55 | ????10 | ????19 | ????0.10 |
| Embodiment 9 | ????0.7 | ????35 | ????10 | ????19 | ????0.15 |
| Embodiment 10 | ????1.0 | ????35 | ????10 | ????19 | ????0.28 |
| Embodiment 11 | ????0.7 | ????35 | ????10 | ????19 | ????0.15 |
| Embodiment 12 | ????0.7 | ????65 | ????20 | ????19 | ????0.30 |
| Embodiment 13 | ????0.3 | ????35 | ????10 | ????25 | ????0.15 |
| Embodiment 14 | ????0.7 | ????35 | ????10 | ????19 | ????0.15 |
| Embodiment 15 | ????0.7 | ????35 | ????5 | ????25 | ????0.15 |
| Embodiment 16 | ????0.7 | ????35 | ????10 | ????19 | ????0.15 |
| 2MB2/2MB1 in the product | Transformation efficiency (%) | 2MB2 selectivity (%) | |
| Embodiment 1 | ????13.1 | ????67.7 | ????90.8 |
| Embodiment 2 | ????12.7 | ????71.4 | ????92.2 |
| Embodiment 3 | ????13.2 | ????63.2 | ????92.3 |
| Embodiment 4 | ????13.5 | ????61.5 | ????91.8 |
| Embodiment 5 | ????13.2 | ????60.0 | ????93.0 |
| Embodiment 6 | ????13.5 | ????63.5 | ????92.3 |
| Embodiment 7 | ????12.7 | ????65.1 | ????88.7 |
| Embodiment 8 | ????12.3 | ????66.1 | ????83.8 |
| Embodiment 9 | ????13.5 | ????63.5 | ????92.3 |
| Embodiment 10 | ????11.6 | ????55.4 | ????91.6 |
| Embodiment 11 | ????13.5 | ????63.5 | ????92.3 |
| Embodiment 12 | ????13.0 | ????61.7 | ????89.5 |
| Embodiment 13 | ????13.2 | ????67.7 | ????91.8 |
| Embodiment 14 | ????13.5 | ????63.5 | ????92.3 |
| Embodiment 15 | ????12.7 | ????63.0 | ????92.2 |
| Embodiment 16 | ????13.5 | ????63.5 | ????92.3 |
Claims (5)
1, a kind of method that improves 2-methyl-2-butene content in the isopentene, the isopentene material that will contain 2-methyl-1-butene alkene and 2-methyl-2-butene, wherein 2-methyl-2-butene/2-methyl-1-butene alkene is (1～5)/1, in the presence of catalyzer sulfonic acid Zeo-karb, carry out isomerization reaction so that 2-methyl-1-butene alkene is converted into the 2-methyl-2-butene, the sulfonic acid Zeo-karb specific surface area be 10～38m
2/ g, pore volume are 0.1～0.3ml/g, and isomerization reaction is a liquid phase reaction, and liquid hourly space velocity is 1～35hr
-1, temperature of reaction is 25～70 ℃, reaction pressure is 0.3～1.0Mpa, obtains the isopentene product of high content of 2-methyl-2-butene.
2, the method for 2-methyl-2-butene content in the raising isopentene according to claim 1, the specific surface area that it is characterized in that described sulfonic acid Zeo-karb is 15～25m
2/ g.
3, the method for 2-methyl-2-butene content in the raising isopentene according to claim 1 is characterized in that described liquid hourly space velocity is 5～20hr
-1
4, the method for 2-methyl-2-butene content in the raising isopentene according to claim 1 is characterized in that described temperature of reaction is 35～55 ℃.
5, the method for 2-methyl-2-butene content in the raising isopentene according to claim 1 is characterized in that described reaction pressure is 0.4～0.8Mpa.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101723786A (en) * | 2008-10-31 | 2010-06-09 | 中国石化上海石油化工股份有限公司 | Method for increasing proportion of 2-methyl-2-butene in isoamylene |
| CN102040451A (en) * | 2009-10-26 | 2011-05-04 | 中国石油化工股份有限公司 | Isomerization method of 2-methyl-1-butylene |
| CN102040450A (en) * | 2009-10-26 | 2011-05-04 | 中国石油化工股份有限公司 | Method for isomerizing isopentene |
| CN101597198B (en) * | 2008-06-05 | 2012-09-05 | 中国石化上海石油化工股份有限公司 | Method for improving content of 2-methyl-2-butylene in coarse isoamylene |
| CN101597201B (en) * | 2008-06-05 | 2012-09-05 | 中国石化上海石油化工股份有限公司 | Method for isomerizing 2-methyl-1-butylene into 2-methyl-2-butylene |
| CN101597203B (en) * | 2008-06-05 | 2012-09-05 | 中国石化上海石油化工股份有限公司 | Method for improving content of 2-methyl-2-butylene in coarse isoamylene |
| CN101723777B (en) * | 2008-10-31 | 2012-10-24 | 中国石化上海石油化工股份有限公司 | Method for preparing isoamylene by taking tertiary amyl methyl ether as raw material |
| CN101723787B (en) * | 2008-10-31 | 2012-12-26 | 中国石化上海石油化工股份有限公司 | Method for increasing content of 2-methyl-2-butene in isoamylene |
| CN101723776B (en) * | 2008-10-31 | 2012-12-26 | 中国石化上海石油化工股份有限公司 | Method for preparing isoamylene |
| CN104557409A (en) * | 2013-10-11 | 2015-04-29 | 中国石油化工股份有限公司 | A method of preparing high-purity 1-pentene |
-
2001
- 2001-02-23 CN CN 01105416 patent/CN1128124C/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597198B (en) * | 2008-06-05 | 2012-09-05 | 中国石化上海石油化工股份有限公司 | Method for improving content of 2-methyl-2-butylene in coarse isoamylene |
| CN101597201B (en) * | 2008-06-05 | 2012-09-05 | 中国石化上海石油化工股份有限公司 | Method for isomerizing 2-methyl-1-butylene into 2-methyl-2-butylene |
| CN101597203B (en) * | 2008-06-05 | 2012-09-05 | 中国石化上海石油化工股份有限公司 | Method for improving content of 2-methyl-2-butylene in coarse isoamylene |
| CN101723786A (en) * | 2008-10-31 | 2010-06-09 | 中国石化上海石油化工股份有限公司 | Method for increasing proportion of 2-methyl-2-butene in isoamylene |
| CN101723777B (en) * | 2008-10-31 | 2012-10-24 | 中国石化上海石油化工股份有限公司 | Method for preparing isoamylene by taking tertiary amyl methyl ether as raw material |
| CN101723787B (en) * | 2008-10-31 | 2012-12-26 | 中国石化上海石油化工股份有限公司 | Method for increasing content of 2-methyl-2-butene in isoamylene |
| CN101723776B (en) * | 2008-10-31 | 2012-12-26 | 中国石化上海石油化工股份有限公司 | Method for preparing isoamylene |
| CN102040451A (en) * | 2009-10-26 | 2011-05-04 | 中国石油化工股份有限公司 | Isomerization method of 2-methyl-1-butylene |
| CN102040450A (en) * | 2009-10-26 | 2011-05-04 | 中国石油化工股份有限公司 | Method for isomerizing isopentene |
| CN104557409A (en) * | 2013-10-11 | 2015-04-29 | 中国石油化工股份有限公司 | A method of preparing high-purity 1-pentene |
| CN104557409B (en) * | 2013-10-11 | 2018-03-20 | 中国石油化工股份有限公司 | The method of the amylene of high-purity 1 |
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