CN109651056A - The method for reducing diene hydrocarbon content in coarse isoamylene - Google Patents
The method for reducing diene hydrocarbon content in coarse isoamylene Download PDFInfo
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- CN109651056A CN109651056A CN201710935743.1A CN201710935743A CN109651056A CN 109651056 A CN109651056 A CN 109651056A CN 201710935743 A CN201710935743 A CN 201710935743A CN 109651056 A CN109651056 A CN 109651056A
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- coarse isoamylene
- diolefin
- isoamylene
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- catalyst
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/148—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound
- C07C7/177—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound by selective oligomerisation or polymerisation of at least one compound of the mixture
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention provides the methods for reducing diene hydrocarbon content in coarse isoamylene, are related to the separation of olefins technical field of C5 fraction.The present invention carries out polymerization reaction by catalyst bed with liquid phase according to diolefin and the active difference of monoolefm polymerisations, by coarse isoamylene, makes the diolefin polymerization in coarse isoamylene, and the catalyst is storng-acid cation exchange resin, and mass space velocity is 1~20hr‑1, reaction temperature is 20~60 DEG C, and reaction pressure is 0.3~2.0MPa, to reduce the content for being etherified diolefin in preceding coarse isoamylene raw material.Through the invention, existing processing step is simplified, defect of the existing technology is effectively overcomed.
Description
Technical field
The present invention relates to the separation of olefins technical fields of C5 fraction.
Background technique
Iso-amylene is a kind of important industrial chemicals, for producing pinacoline, and then produce efficient triazole bactericidal agent and
Plant growth regulator, herbicide etc. also serve as many fragrance, pesticide intermediate, it is also possible to make ultraviolet absorbing agent, photograph sense
Luminescent material and concrete dispersing agent etc..
The light dydrocarbon of C 5 fraction or naphtha pyrolysis ethylene by-product that iso-amylene is primarily present in catalytically cracked gasoline evaporates
In part, since, containing the compound very close there are many boiling point, iso-amylene is therefrom separated and is not easy in these light dydrocarbon materials.Mesh
The preceding separation method at most used is tert amyl methyl ether(TAME) cracking process, i.e., C 5 fraction is reacted with methanol generates methyl tert-amyl
Then ether is refining to obtain high-purity methyl tert-amyl ether, then Pintsch process obtains iso-amylene.
Since the diolefin contained in coarse isoamylene easily leads to the inactivation of catalyst for etherification, the prior art such as Chinese patent
CN201210363942.7 etc. is generallyd use plus the method for hydrogen, diene content in raw material is reduced, to improve catalyst for etherification
The cycle of operation.But the alkaline matter that contains of coarse isoamylene and Determination of Trace Sulfur easily lead to the inactivation of selective hydrogenation catalyst, because
This, which adds, the techniques such as washes it is usually necessary to use desulfurizing agent and Purified Water before hydrogen and pre-processes to raw material, is contained with reducing sulphur in raw material
Amount and removing alkaline matter.
In the prior art, selection hydrogenation process not only increases equipment investment, consumes selective hydrogenation catalyst and hydrogen,
And it inevitably increased the loss of coarse isoamylene, while washing repeatedly produces waste water in large quantities, increases at the three wastes
Reason expense.
Summary of the invention
It is an object of the invention to: it has overcome the deficiencies of the prior art and provide diolefin in a kind of reduction coarse isoamylene and has contained
The method of amount.Present invention solves the technical problem that be the process conditions for how selecting suitable catalyst and control suitable, it will be thick
Micro diolefin direct polymerization in iso-amylene, to reduce the content for being etherified diolefin in preceding coarse isoamylene raw material.
The following are the specific technical solutions of the present invention:
A kind of method of diene hydrocarbon content in reduction coarse isoamylene, the following steps are included:
Coarse isoamylene is subjected to polymerization reaction by catalyst bed with liquid phase, make isoprene in coarse isoamylene,
The diolefin polymerizations such as pentadiene；The catalyst is storng-acid cation exchange resin, and mass space velocity is 1~20hr-1, reaction temperature
Degree is 20~60 DEG C, and reaction pressure is 0.3~2.0MPa.After polymerization reaction, the content of diolefin is down to 0.3% or less.
The catalyst, preferably macropore sulfonic group cation exchange resin.
The mass space velocity is preferably 5~15hr-1, the reaction temperature is preferably 30~50 DEG C, and the reaction pressure is excellent
It is selected as 0.8~1.6MPa.
Key of the invention is the process conditions by selecting suitable catalyst and control suitable, will be in coarse isoamylene
Micro diolefin direct polymerization reduces the content of diolefin in coarse isoamylene raw material.
Inventor is found through experiments that, according to diolefin and the active difference of monoolefm polymerisations, the sulphur of bulky grain can be selected
Acidic group cation exchange resin controls suitable process conditions, by the micro diolefin direct polymerization in coarse isoamylene, to meet
Limitation requirement of the etherification procedure to raw material.
The present invention is due to using the technology described above, compared with prior art, other without introducing into reaction system
Substance does not increase additional burden to the purifying of product or purification, and only by the control to polymerization reaction, make etherification reaction
The content of preceding diolefin can be down to 0.3% hereinafter, simplify existing processing step, effectively overcome of the existing technology
Defect.
Detailed description of the invention
Fig. 1 is the method and process flow chart of diene hydrocarbon content in reduction coarse isoamylene provided in an embodiment of the present invention.
Description of symbols:
Polymer reactor 100.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to the method for diene hydrocarbon content in reduction coarse isoamylene provided by the invention
It is described in further detail.It should be noted that the combination of technical characteristic or technical characteristic described in following embodiments is not
Should be considered as it is isolated, they can be combined with each other to reaching superior technique effect.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as authorizing part of specification.Institute that is shown here and discussing
Have in example, any occurrence should be construed as merely illustratively, not as limitation.Therefore, exemplary embodiment
Other examples can have different values.
Embodiment [1~10]
The process flow of Examples 1 to 10 is shown in Figure 1, reduces using coarse isoamylene as raw material by following technical process
Diene hydrocarbon content in coarse isoamylene:
Coarse isoamylene raw material with liquid phase by being provided with the polymer reactor 100 of catalyst bed, in polymer reactor 100
Middle carry out polymerization reaction, makes the diolefin polymerizations such as isoprene, the pentadiene in coarse isoamylene, obtains diene hydrocarbon content and is lower than
0.3% iso-amylene material W1.The catalyst is macropore sulfonic group cation exchange resin.
Reactor size can be the stainless steel tube of φ 25mm × 1500mmd, and it is 0.40~1.25mm that partial size is packed into pipe
Macropore sulfonic group cation exchange resin agent constitute catalyst bed, reaction feed amount controls by feed pump.
Mass space velocity in the polymer reactor can be 1~20hr-1, reaction temperature can be 20~60 DEG C, reaction
Pressure can be 0.3~2.0MPa.
By the aforementioned control to diolefin polymerization reaction condition, isoprene in coarse isoamylene, penta 2 are reduced
The content of the diolefins such as alkene can make the content of diolefin before etherification reaction be down to 0.3% or less.
The process implementing condition of each embodiment and it the results are shown in Table 1.
Table 1.
Claims (5)
1. a kind of method for reducing diene hydrocarbon content in coarse isoamylene, it is characterised in that the following steps are included:
Coarse isoamylene is subjected to polymerization reaction by catalyst bed with liquid phase, makes the diolefin polymerization in coarse isoamylene, reacts
The content of diolefin is down to 0.3% or less afterwards；The catalyst be storng-acid cation exchange resin, mass space velocity be 1~
20hr-1, reaction temperature is 20~60 DEG C, and reaction pressure is 0.3~2.0MPa.
2. according to the method described in claim 1, it is characterized by: the catalyst is macropore sulfonic group cation exchange tree
Rouge.
3. according to the method described in claim 1, it is characterized by: the mass space velocity is 5~15hr-1。
4. according to the method described in claim 1, it is characterized by: the reaction temperature is 30~50 DEG C.
5. according to the method described in claim 1, it is characterized by: the reaction pressure is 0.8~1.6MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710935743.1A CN109651056A (en) | 2017-10-10 | 2017-10-10 | The method for reducing diene hydrocarbon content in coarse isoamylene |
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| CN201710935743.1A CN109651056A (en) | 2017-10-10 | 2017-10-10 | The method for reducing diene hydrocarbon content in coarse isoamylene |
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| CN201710935743.1A Pending CN109651056A (en) | 2017-10-10 | 2017-10-10 | The method for reducing diene hydrocarbon content in coarse isoamylene |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2398930A (en) * | 1943-01-23 | 1946-04-23 | Filtrol Corp | Process for separating monomeric diolefins from mixtures of relatively low boiling diolefin and mono-olefin monomers |
| CN103664458A (en) * | 2012-09-25 | 2014-03-26 | 中国石油化工股份有限公司 | Selective hydrogenation method of crude isopentene |
-
2017
- 2017-10-10 CN CN201710935743.1A patent/CN109651056A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2398930A (en) * | 1943-01-23 | 1946-04-23 | Filtrol Corp | Process for separating monomeric diolefins from mixtures of relatively low boiling diolefin and mono-olefin monomers |
| CN103664458A (en) * | 2012-09-25 | 2014-03-26 | 中国石油化工股份有限公司 | Selective hydrogenation method of crude isopentene |
Non-Patent Citations (2)
| Title |
|---|
| 徐泽辉: "《中国博士学位论文全文数据库 工程科技Ⅰ辑》", 15 September 2010 * |
| 杨忠保等: "异戊烯的生产", 《石油化工》 * |
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Application publication date: 20190419 |