CN101417918A - Technique for preparing cyclohexane by benzene hydrogenation using hydrogen produced by oxygen enrichment natural gas steam reforming method - Google Patents
Technique for preparing cyclohexane by benzene hydrogenation using hydrogen produced by oxygen enrichment natural gas steam reforming method Download PDFInfo
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- CN101417918A CN101417918A CNA200810013755XA CN200810013755A CN101417918A CN 101417918 A CN101417918 A CN 101417918A CN A200810013755X A CNA200810013755X A CN A200810013755XA CN 200810013755 A CN200810013755 A CN 200810013755A CN 101417918 A CN101417918 A CN 101417918A
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- rich oxygen
- gas steam
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention relates to a technique method for using hydrogen obtained from rich oxygen in a natural gas steam reforming method to prepare cyclohexane with benzene hydrogenation, in particular to be used in the raw material hydrogen which is needed in the cyclohexane production technique. The rich oxygen produced in a rich oxygen device and the reforming gas obtained from a natural gas steam reforming method in a primary reformer are reacted in a secondary reformer; and then the steps of medium and low change, decarburization and methanation to prepare hydrogen with high hydrogen content which is used for producing cyclohexane, thereby reducing the hydrogenation exhaust emissions. The devices for realizing the treatment method comprises a rich oxygen production device, a rich oxygen condensing machine, rich oxygen content controlling system, natural gas steam primary reformer, a secondary reformer, a middle and low furnace, a decarbuation device, a methanation furnace and a benzene hydrogenation furnace. The invention has the advantages of replacing air with rich oxygen, reducing the content of nitrogen in the hydrogen production process and the tail gas discharging amount in the benzene hydrogenation process, increasing the hydrogen content in the hydrogen production process; the hydrogen is used in the benzene hydrogenation process, thereby achieving the purpose of energy saving, discharge reduction and environmental protection.
Description
Technical field
Relate to and a kind of oxygen enrichment is used for the processing method that hydrogen that natural gas steam reforming produces is used for the prepared from benzene and hydrogen hexanaphthene.Be particularly useful for prepared from benzene and hydrogen hexanaphthene production raw hydrogen in the Cyclohexanone Production industry.
Technical background
At present in the Cyclohexanone Production industry, benzene hydrogenation generates hexanaphthene, hexanaphthene and reoxidizes and generate that the hydrogen source is many-sided in the cyclohexanone production process, and it is one of traditional method wherein that hydrogen is produced in natural gas steam reforming, two sections atmospheric oxidations.Airborne nitrogen is not participated in reaction as a kind of rare gas element in full scale production technology, heating in the production process, cooling, last emptying will consume a large amount of energy, also cause topsoil, make equipment increase capacity, have strengthened cost investment.If a nitrogen content, the just a large amount of volumes that reduce technological reaction gas available gas of increase oxygen content in the minimizing air; both save the energy, reduced facility investment or improved output; can reduce the tail gas emptying of benzene hydrogenation in a large number again, thereby reach the purpose of energy-saving and emission-reduction and environment protection.
Summary of the invention
The purpose of this invention is to provide a kind of processing method of utilizing oxygen enrichment to produce higher hydrogen content hydrogen, product hydrogen is specially adapted to the raw hydrogen in the benzene hydrogenation generation hexanaphthene operation in the Cyclohexanone Production industry, cuts down the consumption of energy, and reduces noxious gas emission.The present invention relates to a kind ofly utilize the oxygen enrichment natural gas steam reforming to produce higher hydrogen content hydrogen to be used in particular for that benzene hydrogenation generates hexanaphthene, hexanaphthene reoxidizes the processing method that generates the raw hydrogen in the Cyclohexanone Production.It is characterized in that: utilize natural gas steam reforming, during primary reformer reforming gas and oxygen rich air react and carry out, low change, decarburization, methanation produce the higher hydrogen of hydrogen content and be used for producing cyclohexane by adding hydrogen in benzene in secondary reformer.Realize the device of described treatment process, comprise the oxygen enrichment production equipment, the oxygen enrichment compressor, the oxygen-enriched content operation control system, Sweet natural gas steam one-stage converter, secondary reformer, in, the low stove that becomes, take off the charcoal device, methanation furnace, benzene hydrogenation stove.Advantage of the present invention is to use the oxygen enrichment replaces air, reduces in the hydrogen manufacturing operation in the system tail gas emptying amount in a nitrogen content and benzene hydrogenation operation, and the hydrogen richness that increases hydrogen manufacturing process product hydrogen is used for the benzene hydrogenation operation.Reduce a nitrogen content in the air, increase the just a large amount of volumes that reduce technological reaction gas available gas of oxygen content; both save the energy, reduced facility investment or improved output; can reduce the tail gas emptying of benzene hydrogenation in a large number again, thereby reach the purpose of energy-saving and emission-reduction and environment protection.
Description of drawings:
Accompanying drawing 1 is used for the processing method that hydrogen that natural gas steam reforming produces is used for the prepared from benzene and hydrogen hexanaphthene to oxygen enrichment for the present invention.
Embodiment:
To produce hydrogen be that example provides the embodiment of the invention as benzene hydrogenation production raw hydrogen in the cyclohexanone production apparatus oxygen enrichment is used for natural gas steam reforming with reference to accompanying drawing 1:
Air is produced the oxygen rich gas that contains oxygen 75%-99% through the oxygen enrichment production equipment and is entered the oxygen enrichment storage tank, enter secondary reformer by the oxygen enrichment compressor pressurizes again, in secondary reformer and Sweet natural gas, one section reforming gas generation of steam oxidizing reaction, low change, decarburization, methanation were produced hydrogeneous 75%-99% hydrogen and are carried out the use of prepared from benzene and hydrogen hexanaphthene reaction raw materials for Cyclohexanone Production hydrogenation reaction stove during two sections reforming gas carried out again.
Claims (2)
1, a kind of oxygen enrichment is used for the processing method that hydrogen that natural gas steam reforming produces is used for the prepared from benzene and hydrogen hexanaphthene.It is characterized in that: air utilizes the oxygen enrichment production equipment to produce the oxygen rich air that contains oxygen 21-96%, oxygen enrichment pressure is stablized in pressurization, one section reforming gas of oxygen rich air and Sweet natural gas steam reacts in secondary reformer, again through in, low become reaction, take off the charcoal device, methanation reaction produces the hydrogen of hydrogen content 75-98%, is used for prepared from benzene and hydrogen hexanaphthene explained hereafter.
2, a kind of device of implementing right 1 described method, it is characterized in that this method has adopted a cover oxygen enrichment production equipment, the oxygen enrichment compressor, the oxygen-enriched content operation control system, Sweet natural gas steam one-stage converter, secondary reformer, in, the low Reaktionsofen that becomes, take off the charcoal device, methanation reaction stove, benzene hydrogenation stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810013755XA CN101417918A (en) | 2008-01-08 | 2008-01-08 | Technique for preparing cyclohexane by benzene hydrogenation using hydrogen produced by oxygen enrichment natural gas steam reforming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810013755XA CN101417918A (en) | 2008-01-08 | 2008-01-08 | Technique for preparing cyclohexane by benzene hydrogenation using hydrogen produced by oxygen enrichment natural gas steam reforming method |
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| Publication Number | Publication Date |
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| CN101417918A true CN101417918A (en) | 2009-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA200810013755XA Pending CN101417918A (en) | 2008-01-08 | 2008-01-08 | Technique for preparing cyclohexane by benzene hydrogenation using hydrogen produced by oxygen enrichment natural gas steam reforming method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103804161A (en) * | 2012-11-06 | 2014-05-21 | 中国石油化工股份有限公司 | Air distribution method in cyclohexane oxidation reaction for cyclohexanone production |
| EP3112335A4 (en) * | 2014-02-25 | 2017-10-11 | Chiyoda Corporation | Aromatic compound hydrogenation system and hydrogenation method |
| CN114075095A (en) * | 2020-08-18 | 2022-02-22 | 中石化南京化工研究院有限公司 | Comprehensive utilization method of hydrogen in caprolactam production |
-
2008
- 2008-01-08 CN CNA200810013755XA patent/CN101417918A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103804161A (en) * | 2012-11-06 | 2014-05-21 | 中国石油化工股份有限公司 | Air distribution method in cyclohexane oxidation reaction for cyclohexanone production |
| EP3112335A4 (en) * | 2014-02-25 | 2017-10-11 | Chiyoda Corporation | Aromatic compound hydrogenation system and hydrogenation method |
| TWI618696B (en) * | 2014-02-25 | 2018-03-21 | 千代田化工建設股份有限公司 | Hydrogenation system for aromatic compound |
| CN114075095A (en) * | 2020-08-18 | 2022-02-22 | 中石化南京化工研究院有限公司 | Comprehensive utilization method of hydrogen in caprolactam production |
| CN114075095B (en) * | 2020-08-18 | 2024-01-16 | 中石化南京化工研究院有限公司 | Comprehensive utilization method of hydrogen in caprolactam production |
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Application publication date: 20090429 |