CN101993329A - Technique for preparing butene by adopting molecular sieve adsorption method for purification in gas phase state - Google Patents
Technique for preparing butene by adopting molecular sieve adsorption method for purification in gas phase state Download PDFInfo
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- CN101993329A CN101993329A CN2010105088400A CN201010508840A CN101993329A CN 101993329 A CN101993329 A CN 101993329A CN 2010105088400 A CN2010105088400 A CN 2010105088400A CN 201010508840 A CN201010508840 A CN 201010508840A CN 101993329 A CN101993329 A CN 101993329A
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- butylene
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Abstract
The invention discloses a technique for preparing butene by adopting a molecular sieve adsorption method for purification in a gas phase state. The technique mainly comprises a raw material inlet pipe, a hydrogenator, a molecular sieve adsorption column, an n-hexane storage tank, an upper fractionating column, an isobutene rectifying column, an n-hexane purifying column, a lower fractionating column, an n-butene rectifying column and a finished product butene outlet pipe which are integrally connected together in turn through a connecting pipeline. The technique has a reasonable process and simple preparation, and the produced butene has high purity; besides, the technique also solves the problem of environmental pollution, and is an ideal butene preparation technique.
Description
Affiliated technical field
The present invention relates to a kind of synthetic technology of preparing of Chemicals, particularly a kind of technology that adopts molecular sieve adsorption method purification preparation butylene under the gas phase state that adopts is suitable for the high-purity butylene of the synthetic preparation of chemical industry.
Background technology
At present, the complex production process of butylene, temperature of reaction instability during reaction, purity is low.
Summary of the invention
Problem to be solved by this invention is, overcomes the deficiencies in the prior art, and a kind of technology that adopts molecular sieve adsorption method purification preparation butylene under the gas phase state that adopts is provided.This technology not only technology is reasonable, and preparation is simple, and the butylene purity height of producing, and has solved problem of environmental pollution.
The technical solution used in the present invention is: material inlet pipe, hydrogenator, adsorbing tower with molecular sieve, normal hexane basin, go up separation column, iso-butylene rectifying tower, normal hexane scavenging tower, separation column, n-butene rectifying tower, finished product butylene outlet pipe constitute by the connection line one that is linked in sequence down.When using the technology of the present invention, according to working specification, join raw material in the hydrogenator of the technology of the present invention by the material inlet pipe, after hydrogenation reaction, enter the adsorbing tower with molecular sieve adsorption treatment that the normal hexane with the normal hexane basin washed, through last separation column, the fractionation of iso-butylene rectifying tower and rectifying, preparation Trimethylmethane and iso-butylene, oligopolymer is discharged by the normal hexane scavenging tower, after hydrogenation reaction, enter the adsorbing tower with molecular sieve adsorption treatment, through separation column and fractionation of n-butene rectifying tower and rectifying down, prepare high-purity butylene and normal butane.
Adopt gas phase state to adopt the technology of molecular sieve adsorption method purification butylene down, producing polymerization-grade 1-butylene product because of employing by the C4 compound is main purpose, does not generate the situation of high-purity isobutylene or methyl tertiary butyl ether.
The technology of the present invention adopts gas phase operation, absorption and desorption process all 100 ℃ with 101.325kPa pressure under carry out.Adsorption liquid is carried out rectifying, and to remove a small amount of normal butane and 2-butylene, last gained 1-butylene purity is greater than 99.0%.The C4 material of having vaporized is sent in advance in the adsorption tower with the normal hexane flushing, and the desorption that produce normal hexane this moment on the one hand carries out the adsorption of 1-butylene (n-butene) on the other hand.Xi Fu normal hexane and iso-butylene do not enter separation column, and the iso-butylene cut is discharged by cat head, and normal hexane advances the normal hexane basin and recycles at the bottom of the tower.The iso-butylene cut enters the iso-butylene rectifying tower, tells Trimethylmethane, improves iso-butylene purity.After the sorbent material of adsorption tower absorbed saturated (or near saturated), adsorption tower carried out rinsing desorption, from top to bottom washed 1-butylene in the bed with the normal hexane that is heated to 100 ℃, and 1-butylene and normal hexane that desorption goes out enter separation column.Fractionator overhead distilled 1-butylene enters the n-butene rectifying tower again, further improves 1-butylene purity, discharges normal hexane at the bottom of the fractionation Tata and advances the normal hexane basin and recycle.Be provided with the normal hexane scavenging tower in the flow process, be interrupted or separate continuously olefin oligomer wherein.
The invention has the beneficial effects as follows that technology is reasonable, preparation is simple, the butylene purity height of production, and solved problem of environmental pollution.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
Accompanying drawing number is: 1, hydrogenator, 2, adsorbing tower with molecular sieve, 3, the normal hexane basin, 4, go up separation column, 5, iso-butylene rectifying tower, 6, the normal hexane scavenging tower, 7, separation column down, 8, the n-butene rectifying tower, 9, connection line, 10, the material inlet pipe, 11, finished product butylene outlet pipe.
Embodiment
With reference to Fig. 1, material inlet pipe 10, hydrogenator 1, adsorbing tower with molecular sieve 2, normal hexane basin 3, go up separation column 4, iso-butylene rectifying tower 5, normal hexane scavenging tower 6, separation column 7, n-butene rectifying tower 8, finished product butylene outlet pipe 11 constitute by connection line 9 one that is linked in sequence down.When using the technology of the present invention, according to working specification, join raw material in the hydrogenator 1 of the technology of the present invention by material inlet pipe 10, after hydrogenation reaction, enter adsorbing tower with molecular sieve 2 adsorption treatment that the normal hexane with normal hexane basin 3 washed, through last separation column 4,5 fractionation of iso-butylene rectifying tower and rectifying, preparation Trimethylmethane and iso-butylene, oligopolymer is discharged by normal hexane scavenging tower 6, after hydrogenation reaction, enter adsorbing tower with molecular sieve 2 adsorption treatment, through separation column 7 and 8 fractionation of n-butene rectifying tower and rectifying down, from n-butene rectifying tower 8 high-purity butylene of preparation and normal butanes, high-purity butylene is through 11 bottlings of finished product butylene outlet pipe.
Adopt gas phase state to adopt the technology of molecular sieve adsorption method purification butylene down, producing polymerization-grade 1-butylene product because of employing by the C4 compound is main purpose, does not generate the situation of high-purity isobutylene or methyl tertiary butyl ether.
The technology of the present invention adopts gas phase operation, absorption and desorption process all 100 ℃ with 101.325kPa pressure under carry out.Adsorption liquid is carried out rectifying, and to remove a small amount of normal butane and 2-butylene, last gained 1-butylene purity is greater than 99.0%.The C4 material of having vaporized is sent in advance in the adsorption tower with the normal hexane flushing, and the desorption that produce normal hexane this moment on the one hand carries out the adsorption of 1-butylene (n-butene) on the other hand.Xi Fu normal hexane and iso-butylene do not enter separation column, and the iso-butylene cut is discharged by cat head, and normal hexane advances the normal hexane basin and recycles at the bottom of the tower.The iso-butylene cut enters the iso-butylene rectifying tower, tells Trimethylmethane, improves iso-butylene purity.After the sorbent material of adsorption tower absorbed saturated (or near saturated), adsorption tower carried out rinsing desorption, from top to bottom washed 1-butylene in the bed with the normal hexane that is heated to 100 ℃, and 1-butylene and normal hexane that desorption goes out enter separation column.Fractionator overhead distilled 1-butylene enters the n-butene rectifying tower again, further improves 1-butylene purity, discharges normal hexane at the bottom of the fractionation Tata and advances the normal hexane basin and recycle.Be provided with the normal hexane scavenging tower in the flow process, be interrupted or separate continuously olefin oligomer wherein.
This technology not only technology is reasonable, and preparation is simple, and the butylene purity height of producing, and has solved problem of environmental pollution.
Claims (1)
1. one kind is adopted under the gas phase state and to adopt the purify technology of preparation butylene of molecular sieve adsorption method, it is characterized in that: material inlet pipe, hydrogenator, adsorbing tower with molecular sieve, normal hexane basin, go up separation column, iso-butylene rectifying tower, normal hexane scavenging tower, separation column, n-butene rectifying tower, finished product butylene outlet pipe constitute by the connection line one that is linked in sequence down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105088400A CN101993329A (en) | 2010-10-18 | 2010-10-18 | Technique for preparing butene by adopting molecular sieve adsorption method for purification in gas phase state |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105088400A CN101993329A (en) | 2010-10-18 | 2010-10-18 | Technique for preparing butene by adopting molecular sieve adsorption method for purification in gas phase state |
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| CN101993329A true CN101993329A (en) | 2011-03-30 |
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| CN2010105088400A Pending CN101993329A (en) | 2010-10-18 | 2010-10-18 | Technique for preparing butene by adopting molecular sieve adsorption method for purification in gas phase state |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030874A (en) * | 2014-06-19 | 2014-09-10 | 同济大学 | Process for separating n-butene and isobutene based on carbon molecular sieve adsorption |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3721064A (en) * | 1971-02-25 | 1973-03-20 | Union Carbide Corp | Isothermal process for olefin separation |
| CN101652339A (en) * | 2007-03-29 | 2010-02-17 | 韩国能源研究院 | The separation of alkene from olefins/paraffins mixed gas |
-
2010
- 2010-10-18 CN CN2010105088400A patent/CN101993329A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3721064A (en) * | 1971-02-25 | 1973-03-20 | Union Carbide Corp | Isothermal process for olefin separation |
| CN101652339A (en) * | 2007-03-29 | 2010-02-17 | 韩国能源研究院 | The separation of alkene from olefins/paraffins mixed gas |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030874A (en) * | 2014-06-19 | 2014-09-10 | 同济大学 | Process for separating n-butene and isobutene based on carbon molecular sieve adsorption |
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Application publication date: 20110330 |