CN102898266A - Method for selectively hydrogenating acetylene in ethylene under normal pressure - Google Patents
Method for selectively hydrogenating acetylene in ethylene under normal pressure Download PDFInfo
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- CN102898266A CN102898266A CN2012104380477A CN201210438047A CN102898266A CN 102898266 A CN102898266 A CN 102898266A CN 2012104380477 A CN2012104380477 A CN 2012104380477A CN 201210438047 A CN201210438047 A CN 201210438047A CN 102898266 A CN102898266 A CN 102898266A
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- acetylene
- metal
- selective hydrogenation
- catalyzer
- ethene
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- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 title claims abstract description 64
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000005977 Ethylene Substances 0.000 title abstract description 9
- 238000005984 hydrogenation reaction Methods 0.000 claims abstract description 38
- 239000003054 catalyst Substances 0.000 claims abstract description 17
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052709 silver Inorganic materials 0.000 claims abstract description 10
- 238000002256 photodeposition Methods 0.000 claims abstract description 8
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 229910052796 boron Inorganic materials 0.000 claims abstract description 3
- 229910052737 gold Inorganic materials 0.000 claims abstract description 3
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 3
- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 25
- 239000007789 gas Substances 0.000 claims description 21
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 150000003839 salts Chemical class 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 11
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 11
- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 238000000151 deposition Methods 0.000 claims description 9
- 230000008021 deposition Effects 0.000 claims description 8
- 239000010970 precious metal Substances 0.000 claims description 6
- 238000009903 catalytic hydrogenation reaction Methods 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- 229910002651 NO3 Inorganic materials 0.000 claims description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 4
- 239000012153 distilled water Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 4
- 238000004904 shortening Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- ZWYDDDAMNQQZHD-UHFFFAOYSA-L titanium(ii) chloride Chemical compound [Cl-].[Cl-].[Ti+2] ZWYDDDAMNQQZHD-UHFFFAOYSA-L 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims 1
- 229910052622 kaolinite Inorganic materials 0.000 claims 1
- 230000035484 reaction time Effects 0.000 claims 1
- 229910052763 palladium Inorganic materials 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 239000004215 Carbon black (E152) Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 229930195733 hydrocarbon Natural products 0.000 abstract description 2
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 7
- 239000001307 helium Substances 0.000 description 7
- 229910052734 helium Inorganic materials 0.000 description 7
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 7
- 238000003786 synthesis reaction Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000011954 Ziegler–Natta catalyst Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 210000000952 spleen Anatomy 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a method for selectively hydrogenating acetylene in ethylene under normal pressure. Ethylene mixed gas containing the acetylene is subjected to gas phase hydrogenation under normal pressure by using bimetallic A-B/TiO2 as a catalyst, the acetylene is selectively hydrogenated and reduced into ethylene, and the catalyst is an A-B/TiO2 catalyst obtained by a continuous bimetal photo-deposition method, wherein A is Pd, Pt, Au or Rh, and B is Ag, Cu or Ni. The A-B/TiO2 catalyst is used for selectively hydrogenating the acetylene under normal pressure, the ethylene can be reduced under the mild condition to form a hydrocarbon using the ethylene as a main product, and the selectivity of the catalyst is 80 to 97 percent. The method has technical feasibility, does not have secondary pollution, has a remarkable effect of selectively hydrogenating the acetylene in the ethylene, and has high economic and environmental benefits.
Description
Technical field
The present invention relates to the method that acetylene removes in a kind of ethene, be specifically related to a kind of under normal pressure, realize ethene in the method for selective hydrogenation of acetylene.
Background technology
Along with expanding economy, the importance of ethene in industrial production becomes and becomes increasingly conspicuous, and its output has become the important symbol of weighing a national development of oil industry level.Ethene mainly participates in chemical production with the form of monomer, in the reaction process of synthetic high polymer, because ethene is from the hydrocarbon vapours cracking process, during working off one's feeling vent one's spleen, pyrolyzer contains 0.1% ~ 0.5% acetylene, the ziegler natta catalyst that is used in manufacture of polyolefins is easy to inactivation, and the existence of acetylene also can cause the polymerization product degradation, therefore removes a small amount of acetylene in the ethene and caused concern next.
The method that removes acetylene for ethylene unit mainly contains solvent absorption and shortening method.Solvent absorption adopts acetone and other organic solvent as extraction agent, complex process and can cause environmental pollution.Shortening is because treatment scheme is simple, and energy consumption is low, becomes the main method that removes acetylene.
Because the Pd catalyzer has better activity and certain selectivity, the industrial catalyzer of load P d that generally adopts carries out selective hydrogenation to acetylene.Result of study shows, Supported Pd-Catalyst can be by adding suitable auxiliary agent and regulating pretreatment condition and further optimize, raising is to the selectivity of ethene, can observe by method such as dipping bimetal etc. that the selectivity of ethene has had substantive raising in the product, but method all is to realize under the condition of pressurization.
How the selective hydrogenation of acetylene process because realize under the conditions of pressurization, and the anti-high-voltage performance of conversion unit has been proposed higher requirement, and pressure process increased economic input, increased the potential safety hazard in the production operation.Therefore invent a kind of can under normal pressure, the realization method of the selective hydrogenation of acetylene is just become necessary.The catalyzer that uses in the inventive method can realize that acetylene selective hydrogenation under normal pressure generates the purpose of ethene, and this method can realize economic environmental protection, purpose easy and simple to handle.
Summary of the invention
The purpose of this invention is to provide under a kind of normal pressure the method to the selective hydrogenation of acetylene in the ethene.
For realizing purpose of the present invention, by the following technical solutions:
To the method for selective hydrogenation of acetylene in the ethene, it is characterized in that under a kind of normal pressure, with bimetal A-B/TiO
2Be catalyzer, under the condition of normal pressure, the ethene gas mixture that contains acetylene carried out gas phase hydrogenation, selective hydrogenation of acetylene is reduced to ethene, and described catalyzer is take titanium dioxide as carrier, and the light deposition binary metal obtains A-B/TiO successively
2The type catalyzer, wherein A is precious metals pd, Pt, Au or Rh, B is Cu, Ag or Ni.
Described method specifically may further comprise the steps:
1) uses Photodeposition at titanium dioxide surface successively loaded metal A and B, obtain titanium dichloride load bimetal A-B/TiO
2Catalyzer;
2) with A-B/TiO
2Be catalyzer, with acetylene, ethene, hydrogen and rare gas element carry out shortening to mixed gas after mixing, and temperature of reaction is 40 ~ 120 ℃, and selective hydrogenation of acetylene is reduced to ethene.
In the described catalyzer, the precious metal A of load accounts for 0.5 ~ 1.5% of total catalyst quality, the ratio of the mole number of metal A and metal B be 1:0.5 between the 1:3, preferred 1:1.0 is between the 1:3.
Described catalyzer deposits two kinds of metallic elements with the continuous light sedimentation at titanium dioxide, its surface forms the nuclear of precious metals pd or Pt etc., form the shell of the elements such as Ag or Cu at precious metal nuclear outside surface, thereby what of the exposure position by regulating two kinds of metals, reach the absorption that strengthens acetylene, weaken the purpose to the absorption of ethene, prevent that ethene from further adding hydrogen evolution ethane.Pd or Pt expose effective adjusting of position, make catalyzer keep good activity and selectivity in reaction process.
Described catalyzer adopts the method preparation of light deposition, and concrete grammar may further comprise the steps:
1) with TiO
2, the solution of metal A salt and methyl alcohol adds in the photoreactor logical N under the condition of lucifuge
2Qi exhaustion is except O
2, after reacting 3～6h under the UV-light prolonged exposure, it is neutral filtering and being washed till pH with distilled water, oven dry;
Then according to the method described above, metal B is loaded to carrier TiO
2On, that is:
2) step 1) products therefrom, metal B salts solution and methyl alcohol are added in the photoreactor logical N under the lucifuge condition
2Remove O
2After, under the UV-light continuous light, reacted 3～6 hours, it is neutral filtering and being washed till pH with distilled water, oven dry obtains described catalyzer.
Muriate, nitrate or vitriol that described metal A salt is metal A; Described metal B salt is muriate, nitrate or the vitriol of metal B.The concentration of metal A salt or B salt is 0.0001 ~ 0.01g/ml.
The A-B/TiO of above-mentioned Photodeposition preparation
2The type supported bimetal catalyst can be used under the normal pressure selective hydrogenation to acetylene in the ethene.The selectivity of ethene has difference with the molar ratio of two kinds of metals, and selectivity is the highest can be reached 〉=and 95%.
The method of in-situ reducing is adopted in the selective catalytic hydrogenation reaction of acetylene.Catalyzer can first behind 250 ~ 350 ℃ of lower reduction 1 ~ 2h, be down to the selective hydrogenation of carrying out acetylene after 40 ~ 120 ℃.
In the described catalytic hydrogenation reaction, when the consumption of catalyzer was 50mg, the flow velocity of gas mixture was 40 ~ 180ml/min usually; In volumetric concentration, H
2Account for 1～2%, ethene accounts for 50～55%, and acetylene accounts for 0.1～1%, and all the other are rare gas element.
Adopt the light deposition method to prepare A-B/TiO according to the present invention
2The bimetallic catalyzer of type load shows significant effect to selective hydrogenation of acetylene under normal pressure.Catalyzer is stable to the transformation efficiency of acetylene, and the selectivity of target product ethene is stable and high.Feasible on the method and technology to the selective hydrogenation of acetylene in the ethene under catalyzer of the present invention and the normal pressure, non-secondary pollution, obvious processing effect has good economic benefit, and environmentally friendly.
Embodiment
Describe the present invention below in conjunction with specific embodiment.Protection scope of the present invention is not limited with embodiment, but is limited by claim.
Embodiment 1
Prepare Pd-Ag/TiO with Photodeposition
2Catalyzer, wherein the Pd charge capacity is about 1%, and the mol ratio of Pd and Ag is about 1:1.With above-mentioned Pd-Ag/TiO
2As catalyzer, carry out the selective hydrogenation of acetylene under the normal pressure, be converted into ethene and ethane behind the acetylene hydrogenation.The consumption of catalyzer is about 50mg, and temperature of reaction is 40 ~ 120 ℃, H
2Account for 1.455%, ethene accounts for 52.605%, and acetylene accounts for 0.731%, comes balance with helium.The flow velocity of gas mixture is 40 ~ 180ml/min.Synthesis under normal pressure 2 ~ 10h adopts the gas-chromatography of being furnished with fid detector to detect online.The result shows, is 80 ~ 89.0% for the selectivity of target product ethene.
In the specification sheets of the present invention, among present embodiment and the following embodiment and Comparative Examples, catalyst selectivity is defined as:
* 100%.
Comparative Examples 1
Pd/TiO with the Pd charge capacity about 1% of the method for light deposition preparation
2As catalyzer, carry out the selective hydrogenation of acetylene under the normal pressure.The consumption of catalyzer is about 50mg, and temperature of reaction is 40 ~ 120 ℃, H
2Account for 1.455%, ethene accounts for 52.605%, and acetylene accounts for 0.731%, comes balance with helium.The flow velocity of gas mixture is 40 ~ 180ml/min.Synthesis under normal pressure 2 ~ 10h, selectivity of catalyst-180 ~-140%.
As seen utilize Photodeposition preparation only load P d catalyzer not only not have realization to the selective hydrogenation of acetylene, caused on the contrary the loss of ethene in the unstripped gas.
Comparative Examples 2
Ag/TiO with the Ag charge capacity about 1% of the method for light deposition preparation
2As catalyzer.Carry out the selective hydrogenation of acetylene under the normal pressure.The consumption of catalyzer is about 50mg, and temperature of reaction is 40 ~ 120 ℃, H
2Account for 1.455%, ethene accounts for 52.605%, and acetylene accounts for 0.731%, comes balance with helium.The flow velocity of gas mixture is 40 ~ 180ml/min.Synthesis under normal pressure 2 ~ 10h does not show any activity and selectivity.
As seen utilize Photodeposition preparation only loaded Ag catalyzer acetylene is not had activity.
Comparative Examples 3
Prepare Pd-Ag/TiO with pickling process
2Catalyzer, wherein the Pd charge capacity is about 1%, and the mol ratio of Pd and Ag is about 1:1.With this Pd-Ag/TiO
2As catalyzer, carry out the selective hydrogenation of acetylene under the normal pressure.The consumption of catalyzer is about 50mg, and temperature of reaction is 40 ~ 120 ℃, H
2Account for 1.455%, ethene accounts for 52.605%, and acetylene accounts for 0.731%, comes balance with helium.The flow velocity of gas mixture is 40 ~ 180ml/min.Synthesis under normal pressure 2 ~ 10h, selectivity of catalyst-100 ~-20%.
As seen utilize the bimetallic catalyst of pickling process preparation not only not have realization to the selectivity of ethene, caused on the contrary the loss of raw material therein ethylene.
Embodiment 2
About 1% with the Pd charge capacity of the method for light deposition preparation, the atomic molar of Pd and Ag is than being the Pd-Ag/TiO of about 1:0.5
2As catalyzer, carry out the selective hydrogenation of acetylene under the normal pressure.The consumption of catalyzer is about 50mg, and temperature of reaction is 40 ~ 120 ℃, H
2Account for 1.455%, ethene accounts for 52.605%, and acetylene accounts for 0.731%, comes balance with helium.The flow velocity of gas mixture is 40 ~ 180ml/min.Synthesis under normal pressure 2 ~ 10h, selectivity of catalyst-10 ~ 10%.
As seen compare with the catalyzer of single Pd, the interpolation of Ag has effectively changed the selectivity of catalyzer to ethene.
Embodiment 3
About 1% with the Pd charge capacity of the method for light deposition preparation, the atomic molar of Pd and Ag is than being the Pd-Ag/TiO of about 1:1.5
2As catalyzer, carry out the selective hydrogenation of acetylene under the normal pressure.The consumption of catalyzer is about 50mg, and temperature of reaction is 40 ~ 120 ℃, H
2Account for 1.455%, ethene accounts for 52.605%, and acetylene accounts for 0.731%, comes balance with helium.The flow velocity of gas mixture is 40 ~ 180ml/min.Synthesis under normal pressure 2 ~ 10h, selectivity of catalyst 90 ~ 97%.
As seen along with the increase of the content of Ag, catalyzer improves the selectivity of ethene.
Embodiment 4
About 1% with the Pd charge capacity of the method for light deposition preparation, the atomic molar of Pd and Ag is than being the Pd-Ag/TiO of about 1:3
2As catalyzer, carry out the selective hydrogenation of acetylene under the normal pressure.The consumption of catalyzer is about 50mg, and temperature of reaction is 40 ~ 120 ℃, H
2Account for 1.455%, ethene accounts for 52.605%, and acetylene accounts for 0.731%, comes balance with helium.The flow velocity of gas mixture is 40 ~ 180ml/min.Synthesis under normal pressure 2 ~ 10h, selectivity of catalyst 95 ~ 97%.
As seen after the ratio of Pd and Ag reaches 1:1.5, along with the increase of the content of catalyst A g, catalyzer is to the selectivity kept stable of ethene.
Claims (10)
- Under the normal pressure to the method for selective hydrogenation of acetylene in the ethene, it is characterized in that, with binary metal A-B/TiO 2Be catalyzer, under the condition of normal pressure, the ethene gas mixture that contains acetylene carried out gas phase hydrogenation, selective hydrogenation of acetylene is reduced to ethene, and described catalyzer is take titanium dioxide as carrier, and the light deposition binary metal obtains A-B/TiO successively 2The type catalyzer, wherein A is precious metals pd, Pt, Au or Rh, B is Cu, Ag or Ni.
- 2. the method for selective hydrogenation of acetylene according to claim 1 is characterized in that, described method may further comprise the steps:1) uses Photodeposition at titanium dioxide surface successively loaded metal A and B, obtain titanium dichloride load bimetal A-B/TiO 2Catalyzer;2) with A-B/TiO 2Be catalyzer, with acetylene, ethene, hydrogen and rare gas element carry out shortening to mixed gas after mixing, and temperature of reaction is 40 ~ 120 ℃, and selective hydrogenation of acetylene is reduced to ethene.
- 3. the method for selective hydrogenation of acetylene according to claim 1 and 2 is characterized in that, described catalyst A-B/TiO 2In, the precious metal A of load accounts for 0.5 ~ 1.5% of total catalyst quality, and metal A is 1:0.5 ~ 1:3 with the ratio of the mole number of metal B.
- 4. the method for selective hydrogenation of acetylene according to claim 3 is characterized in that, described catalyst A-B/TiO 2In, metal A is 1:1.0 ~ 1:3 with the ratio of the mole number of metal B.
- 5. the method for selective hydrogenation of acetylene according to claim 1 and 2 is characterized in that, the method for described Photodeposition Kaolinite Preparation of Catalyst may further comprise the steps:1) with TiO 2, metal A salts solution and methyl alcohol adds in the photoreactor logical N under the condition of lucifuge 2Remove O 2After, under the UV-light continuous light, reacted 3～6 hours, it is neutral filtering and being washed till pH with distilled water, oven dry;2) step 1) products therefrom, metal B salts solution and methyl alcohol are added in the photoreactor logical N under the condition of lucifuge 2Remove O 2After, under the UV-light continuous light, reacted 3～6 hours, it is neutral filtering and being washed till pH with distilled water, oven dry obtains described catalyzer.
- 6. the method for selective hydrogenation of acetylene according to claim 5 is characterized in that described A salt is the nitrate of metal A, vitriol or muriate; Nitrate, vitriol or muriate that described B salt is metal B.
- 7. the method for selective hydrogenation of acetylene according to claim 5 is characterized in that, the concentration of described A salt or B salt is 0.0001 ~ 0.01g/ml.
- 8. the method for selective hydrogenation of acetylene according to claim 2 is characterized in that step 2) in the catalytic hydrogenation reaction, in the described mixed gas by volume, H 2Account for 1～2%, ethene accounts for 50～55%, and acetylene accounts for 0.1～1%, and all the other are rare gas element.
- 9. the method for selective hydrogenation of acetylene according to claim 2 is characterized in that step 2) in the catalytic hydrogenation reaction, the flow velocity of described mixed gas is 40 ~ 180ml/min.
- 10. the method for selective hydrogenation of acetylene according to claim 2 is characterized in that step 2) the described catalytic hydrogenation reaction time is 2 ~ 10h.
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| CN106732568A (en) * | 2016-12-07 | 2017-05-31 | 南京大学 | A kind of preparation method and application of parachloronitrobenzene selective hydrogenation parachloroanilinum catalyst |
| CN106905113A (en) * | 2017-04-11 | 2017-06-30 | 中国科学技术大学 | A kind of method that hydrogen migration prepares alkene |
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| CN105732263A (en) * | 2014-12-12 | 2016-07-06 | 中国石油天然气股份有限公司 | Selective hydrogenation method for trace acetylene in methanol-to-olefin device |
| CN105732263B (en) * | 2014-12-12 | 2018-10-16 | 中国石油天然气股份有限公司 | Selective hydrogenation method for trace acetylene in methanol-to-olefin device |
| CN106732568A (en) * | 2016-12-07 | 2017-05-31 | 南京大学 | A kind of preparation method and application of parachloronitrobenzene selective hydrogenation parachloroanilinum catalyst |
| CN106732568B (en) * | 2016-12-07 | 2019-07-30 | 南京大学 | A kind of preparation method and application of parachloronitrobenzene selective hydrogenation parachloroanilinum catalyst |
| CN106905113A (en) * | 2017-04-11 | 2017-06-30 | 中国科学技术大学 | A kind of method that hydrogen migration prepares alkene |
| CN106905113B (en) * | 2017-04-11 | 2019-11-22 | 中国科学技术大学 | A kind of method that hydrogen migration prepares alkene |
| CN108097262A (en) * | 2017-12-15 | 2018-06-01 | 太原理工大学 | Catalyst and preparation method and application |
| CN108097262B (en) * | 2017-12-15 | 2020-09-11 | 太原理工大学 | Catalyst, preparation method and application thereof |
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