CN107291054A - Under the conditions of regenerated catalyst in the tail gas of cyclohexanone oxamidinating technique oxygen content method of controlling security - Google Patents
Under the conditions of regenerated catalyst in the tail gas of cyclohexanone oxamidinating technique oxygen content method of controlling security Download PDFInfo
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- CN107291054A CN107291054A CN201610191595.2A CN201610191595A CN107291054A CN 107291054 A CN107291054 A CN 107291054A CN 201610191595 A CN201610191595 A CN 201610191595A CN 107291054 A CN107291054 A CN 107291054A
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- Prior art keywords
- tail gas
- cyclohexanone
- conditions
- oxygen
- oxygen content
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- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 title claims abstract description 72
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 239000001301 oxygen Substances 0.000 title claims abstract description 64
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 64
- 239000007789 gas Substances 0.000 title claims abstract description 60
- 239000003054 catalyst Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims abstract description 33
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 50
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 claims description 36
- 229910052757 nitrogen Inorganic materials 0.000 claims description 25
- 238000009835 boiling Methods 0.000 claims description 6
- 230000003197 catalytic effect Effects 0.000 claims description 6
- 230000002779 inactivation Effects 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 3
- 229910001882 dioxygen Inorganic materials 0.000 claims description 3
- OACQXSXVIFBVIO-UHFFFAOYSA-N [O].O=C1CCCCC1 Chemical compound [O].O=C1CCCCC1 OACQXSXVIFBVIO-UHFFFAOYSA-N 0.000 claims 1
- 238000001035 drying Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- VEZUQRBDRNJBJY-UHFFFAOYSA-N cyclohexanone oxime Chemical compound ON=C1CCCCC1 VEZUQRBDRNJBJY-UHFFFAOYSA-N 0.000 description 10
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000002808 molecular sieve Substances 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 1
- UGACIEPFGXRWCH-UHFFFAOYSA-N [Si].[Ti] Chemical compound [Si].[Ti] UGACIEPFGXRWCH-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41875—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by quality surveillance of production
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C249/00—Preparation of compounds containing nitrogen atoms doubly-bound to a carbon skeleton
- C07C249/04—Preparation of compounds containing nitrogen atoms doubly-bound to a carbon skeleton of oximes
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0286—Modifications to the monitored process, e.g. stopping operation or adapting control
- G05B23/0294—Optimizing process, e.g. process efficiency, product quality
-
- 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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
The present invention relates to the method for controlling security of oxygen content in a kind of tail gas of cyclohexanone oxamidinating technique under the conditions of regenerated catalyst, the problem of security is poor in the prior art is mainly solved.Method of controlling security of the invention by using oxygen content in a kind of tail gas of cyclohexanone oxamidinating technique under the conditions of regenerated catalyst, in the process unit of hydrogen peroxide oxidation Cyclohexanone Production cyclohexanone, under the conditions of using regenerated catalyst, during catalyst is inactivated, the technical scheme for providing alarm, interlocking value and the corresponding safety control measures of safe and reliable Ammoximation reaction device gas phase oxygen content preferably solves above mentioned problem, available in cyclohexanone oxamidinating technique.
Description
Technical field
The present invention relates to the security control of oxygen content in a kind of tail gas of cyclohexanone oxamidinating technique under the conditions of regenerated catalyst
Method.
Background technology
Caprolactam is the monomer of synthetic fibers and engineering plastics, is always market important industrial chemicals in short supply in China.Mesh
Before, most of production of caprolactam changes into cyclohexanone oxime using cyclohexanone, then is rearranged into the process route of caprolactam.
It is a kind of environmental protection that the direct ammoxidation of cyclohexanone that conversion from cyclohexanone to cyclohexanone oxime is used, which prepares cyclohexanone oxime technique,
The technique of low energy consumption.Cyclohexanone oxamidinating synthesizing cyclohexane 1 ketoxime new technology is in lower pressure using cyclohexanone, ammonia and hydrogen peroxide
Under, the tert-butyl alcohol is solvent, using titanium-silicon molecular sieve catalyst (hereinafter referred to as catalyst), in continuous slurry bed reactor
One-step synthesis cyclohexanone oxime, its reaction equation is：
NH3+H2O2+C6H10O=C6H11ON+2H2O
This method directly prepares cyclohexanone oxime, instead of traditional azanol preparation technology, substantially reduces technological process, saves
Investment, not producing ammonium sulfate byproduct, it is to avoid the production of nitrogen oxides and oxysulfide, great to environment protection significance, application prospect is wide
It is general, receive extensive attention.
Under normal operation, Ammoximation reaction is carried out under high conversion, high selectivity, but when raw material proportioning it is improper and/or
During catalyst activity reduction, main reaction speed declines, main to occur following side reaction：
4H2O2+2NH3=N2O+7H2O
3H2O2+2NH3=N2+6H2O
2H2O2=2H2O+O2
The substantial amounts of decomposition of hydrogen peroxide can increase oxygen growing amount, may cause to form explosive gaseous mixture in reactor
Body, blast will be produced by such as running into burning things which may cause a fire disaster, high temperature or electrostatic spark.
This technology method is by tail gas oxygen changing rule in the cyclohexanone oxamidinating course of reaction under the conditions of regenerated catalyst, really
Determine the security control condition of tail gas oxygen content, it is to avoid blast accident occurs for gas phase, it is ensured that the safety and steady operation of device.
The content of the invention
The technical problems to be solved by the invention are that there is provided a kind of new regeneration catalyzing for the problem of security is poor in the prior art
Under the conditions of agent in the tail gas of cyclohexanone oxamidinating technique oxygen content method of controlling security.This method has security preferable
Advantage.
To solve the above problems, the technical solution adopted by the present invention is as follows：Cyclohexanone oxamidinating under the conditions of a kind of regenerated catalyst
The method of controlling security of oxygen content in the tail gas of technique, in the process unit of hydrogen peroxide oxidation Cyclohexanone Production cyclohexanone,
Under the conditions of using regenerated catalyst, there is provided safe and reliable Ammoximation reaction device gas phase during catalyst is inactivated
Alarm, interlocking value and the corresponding safety control measures of oxygen content, to ensure the security of Ammoximation reaction, prevent
Gas phase is fired；Wherein, the alarming value of oxygen volume content is located at 1%-4% in Ammoximation reaction tail gas, and interlocking value is located at 1%-8%；
When oxygen volume content exceedes alarming value in Ammoximation reaction tail gas, it is filled with from reactor head in nitrogen, reduction tail gas
Below oxygen volume content to alarming value；When oxygen volume content reaches interlocking value, system starts interlocked control measure, cuts
Nitrogen charging (herein referring to nitrogen) in disconnected hydrogen peroxide and fed cyclohexanone, reactor, until oxygen content drops to below alarming value.
In above-mentioned technical proposal, it is preferable that when oxygen volume content reaches interlocking value, system starts interlocked control measure, cuts
Nitrogen charging in disconnected hydrogen peroxide and fed cyclohexanone, reactor, until oxygen content drops to below alarming value, and keeps the tert-butyl alcohol
Circulation.
In above-mentioned technical proposal, it is preferable that when oxygen content exceedes alarming value in Ammoximation reaction tail gas, from reactor top
Portion is filled with nitrogen, the oxygen volume content in reduction tail gas to 0-2%.
In above-mentioned technical proposal, it is preferable that regenerated catalyst is fresh catalyst inactivation later by washing, boiling, tertiary fourth
Reusable catalyst after alcohol cleaning, dry or roasting, its catalytic activity is generally the 50-99% of fresh catalyst.
The present invention relates to the security control of oxygen content in a kind of tail gas of cyclohexanone oxamidinating technique under the conditions of regenerated catalyst
Method.It is more preferable control reaction end gas oxygen content under the conditions of using regenerated catalyst, prevents due to reactor tail gas oxygen
Gas content is too high and causes reactor to explode, it is ensured that the safety and steady operation of device, achieves preferable technique effect.
Below by embodiment, the invention will be further elaborated, but is not limited only to the present embodiment.
Embodiment
【Embodiment 1】
Under the conditions of a kind of regenerated catalyst in the tail gas of cyclohexanone oxamidinating technique oxygen content method of controlling security, using titanium
Silicalite molecular sieve catalyst, regenerated catalyst is that fresh catalyst inactivation is cleaned by washing, boiling, the tert-butyl alcohol, dried later
Or reusable catalyst later is calcined, its catalytic activity is generally the 80% of fresh catalyst.Urged using regeneration
Under the conditions of agent, there is provided the report of safe and reliable Ammoximation reaction device gas phase oxygen content during catalyst is inactivated
Alert, interlocking value and corresponding safety control measures, to ensure the security of Ammoximation reaction, prevent gas phase and fire；Its
In, the alarming value of oxygen volume content is located at 2% in Ammoximation reaction tail gas, and interlocking value is located at 3%；When Ammoximation reaction tail
When oxygen volume content exceedes alarming value in gas, operating personnel must open reactor nitrogen adjustment valve to anti-in 30 minutes
Answer the oxygen volume content in device gas phase nitrogen charging, reduction tail gas to less than 2%, stop nitrogen charging；Join when oxygen volume content is reached
During drop lock, system starts urgent nitrogen charging in interlocked control measure, emergency cut-off hydrogen peroxide and fed cyclohexanone, reactor immediately,
Until oxygen content drops to less than 2%, and the tert-butyl alcohol is kept to circulate.
【Embodiment 2】
Under the conditions of a kind of regenerated catalyst in the tail gas of cyclohexanone oxamidinating technique oxygen content method of controlling security, using titanium
Silicalite molecular sieve catalyst, regenerated catalyst is that fresh catalyst inactivation is cleaned by washing, boiling, the tert-butyl alcohol, dried later
Or reusable catalyst later is calcined, its catalytic activity is generally the 90% of fresh catalyst.Urged using regeneration
Under the conditions of agent, there is provided the report of safe and reliable Ammoximation reaction device gas phase oxygen content during catalyst is inactivated
Alert, interlocking value and corresponding safety control measures, to ensure the security of Ammoximation reaction, prevent gas phase and fire；Its
In, the alarming value of oxygen volume content is located at 1.5% in Ammoximation reaction tail gas, and interlocking value is located at 2%；Work as Ammoximation reaction
In tail gas oxygen volume content exceed alarming value when, operating personnel must be opened in 15 minutes reactor nitrogen adjustment valve to
Oxygen volume content in reactor gas phase nitrogen charging, reduction tail gas stops nitrogen charging to less than 3%；When oxygen volume content is reached
During interlocking value, system starts immediately promptly fills in interlocked control measure, emergency cut-off hydrogen peroxide and fed cyclohexanone, reactor
Nitrogen, until oxygen content drops to less than 3%, and keeps the tert-butyl alcohol to circulate.
【Embodiment 3】
Under the conditions of a kind of regenerated catalyst in the tail gas of cyclohexanone oxamidinating technique oxygen content method of controlling security, using titanium
Silicalite molecular sieve catalyst, regenerated catalyst is that fresh catalyst inactivation is cleaned by washing, boiling, the tert-butyl alcohol, dried later
Or reusable catalyst later is calcined, its catalytic activity is generally the 95% of fresh catalyst.Urged using regeneration
Under the conditions of agent, there is provided the report of safe and reliable Ammoximation reaction device gas phase oxygen content during catalyst is inactivated
Alert, interlocking value and corresponding safety control measures, to ensure the security of Ammoximation reaction, prevent gas phase and fire；Its
In, the alarming value of oxygen volume content is located at 1% in Ammoximation reaction tail gas, and interlocking value is located at 2%；When Ammoximation reaction tail
When oxygen volume content exceedes alarming value in gas, operating personnel must open reactor nitrogen adjustment valve to anti-in 60 minutes
Answer the oxygen volume content in device gas phase nitrogen charging, reduction tail gas to less than 1%, stop nitrogen charging；Join when oxygen volume content is reached
During drop lock, system starts urgent nitrogen charging in interlocked control measure, emergency cut-off hydrogen peroxide and fed cyclohexanone, reactor immediately,
Until oxygen content drops to less than 1%, and the tert-butyl alcohol is kept to circulate.
【Embodiment 4】
Under the conditions of a kind of regenerated catalyst in the tail gas of cyclohexanone oxamidinating technique oxygen content method of controlling security, using titanium
Silicalite molecular sieve catalyst, regenerated catalyst is that fresh catalyst inactivation is cleaned by washing, boiling, the tert-butyl alcohol, dried later
Or reusable catalyst later is calcined, its catalytic activity is generally the 70% of fresh catalyst.Urged using regeneration
Under the conditions of agent, there is provided the report of safe and reliable Ammoximation reaction device gas phase oxygen content during catalyst is inactivated
Alert, interlocking value and corresponding safety control measures, to ensure the security of Ammoximation reaction, prevent gas phase and fire；Its
In, the alarming value of oxygen volume content is located at 2% in Ammoximation reaction tail gas, and interlocking value is located at 4%；When Ammoximation reaction tail
When oxygen volume content exceedes alarming value in gas, operating personnel must be in reactor nitrogen adjustment valve of opening interior immediately to reactor
Oxygen volume content in gas phase nitrogen charging, reduction tail gas stops nitrogen charging to 0%；When oxygen volume content reaches interlocking value,
System starts urgent nitrogen charging in interlocked control measure, emergency cut-off hydrogen peroxide and fed cyclohexanone, reactor immediately, until oxygen
Gas content drops to less than 1%, and keeps the tert-butyl alcohol to circulate.
Claims (4)
1. under the conditions of a kind of regenerated catalyst in the tail gas of cyclohexanone oxamidinating technique oxygen content method of controlling security, in dioxygen
In the process unit of water oxygen Cyclohexanone Production cyclohexanone, under the conditions of using regenerated catalyst, the mistake that catalyst is inactivated
There is provided alarm, interlocking value and the corresponding safety control measures of safe and reliable Ammoximation reaction device gas phase oxygen content in journey,
To ensure the security of Ammoximation reaction, prevent gas phase and fire；Wherein, oxygen volume content in Ammoximation reaction tail gas
Alarming value be located at 1%-4%, interlocking value is located at 1%-8%；When oxygen volume content exceedes alarming value in Ammoximation reaction tail gas
When, below oxygen volume content to the alarming value that reactor head is filled with nitrogen, reduction tail gas；When oxygen volume content
When reaching interlocking value, system starts nitrogen charging in interlocked control measure, cut-out hydrogen peroxide and fed cyclohexanone, reactor, until
Oxygen content drops to below alarming value.
2. the safety of oxygen content is controlled in the tail gas of cyclohexanone oxamidinating technique under the conditions of regenerated catalyst according to claim 1
Method processed, it is characterised in that oxygen volume content reach interlocking value when, system start interlocked control measure, cut-out hydrogen peroxide and
Nitrogen charging in fed cyclohexanone, reactor, until oxygen content drops to below alarming value, and keeps the tert-butyl alcohol to circulate.
3. the safety of oxygen content is controlled in the tail gas of cyclohexanone oxamidinating technique under the conditions of regenerated catalyst according to claim 1
Method processed, it is characterised in that when oxygen content exceedes alarming value in Ammoximation reaction tail gas, nitrogen is filled with from reactor head,
The oxygen volume content in tail gas is reduced to 0-2%.
4. the safety of oxygen content is controlled in the tail gas of cyclohexanone oxamidinating technique under the conditions of regenerated catalyst according to claim 1
Method processed, it is characterised in that the regenerated catalyst be fresh catalyst inactivation after by washing, boiling, the tert-butyl alcohol clean,
Reusable catalyst after drying or being calcined, its catalytic activity is generally the 50%-99% of fresh catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610191595.2A CN107291054A (en) | 2016-03-30 | 2016-03-30 | Under the conditions of regenerated catalyst in the tail gas of cyclohexanone oxamidinating technique oxygen content method of controlling security |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610191595.2A CN107291054A (en) | 2016-03-30 | 2016-03-30 | Under the conditions of regenerated catalyst in the tail gas of cyclohexanone oxamidinating technique oxygen content method of controlling security |
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Cited By (2)
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| CN112083739A (en) * | 2019-06-12 | 2020-12-15 | 中国石油化工股份有限公司 | Safety control method for oxygen content in tail gas of epoxy chloropropane process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112068617A (en) * | 2019-06-11 | 2020-12-11 | 中国石油化工股份有限公司 | Safety control system and control method for oxidation unit of anthraquinone method hydrogen peroxide device |
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| CN112083739A (en) * | 2019-06-12 | 2020-12-15 | 中国石油化工股份有限公司 | Safety control method for oxygen content in tail gas of epoxy chloropropane process |
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