CS243932B1 - Method of tungsten or molybdenum oxide catalysts' plasma activation - Google Patents
Method of tungsten or molybdenum oxide catalysts' plasma activation Download PDFInfo
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- CS243932B1 CS243932B1 CS844347A CS434784A CS243932B1 CS 243932 B1 CS243932 B1 CS 243932B1 CS 844347 A CS844347 A CS 844347A CS 434784 A CS434784 A CS 434784A CS 243932 B1 CS243932 B1 CS 243932B1
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- 239000003054 catalyst Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 13
- 229910000476 molybdenum oxide Inorganic materials 0.000 title claims description 4
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 title claims description 4
- 238000000678 plasma activation Methods 0.000 title claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims description 4
- 239000010937 tungsten Substances 0.000 title claims description 4
- 229910001930 tungsten oxide Inorganic materials 0.000 title claims description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052786 argon Inorganic materials 0.000 claims abstract description 5
- 239000000741 silica gel Substances 0.000 claims abstract description 5
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 claims abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000007323 disproportionation reaction Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 4
- 150000001336 alkenes Chemical class 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 claims 1
- 238000005243 fluidization Methods 0.000 claims 1
- 230000003213 activating effect Effects 0.000 abstract description 3
- 238000001994 activation Methods 0.000 description 5
- 230000004913 activation Effects 0.000 description 5
- QQONPFPTGQHPMA-UHFFFAOYSA-N Propene Chemical compound CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 102100032843 Beta-2-syntrophin Human genes 0.000 description 1
- 108050004003 Beta-2-syntrophin Proteins 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000006471 dimerization reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002638 heterogeneous catalyst Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Vynález sa týká spósobu aktivácie oxidových katalyzátorov na silikagélovom nosiči. Podstata vynálezu spočívá v priamom vystavení aktivovaného katalyzátore účinkom nízkoteplotnej dusíkovej alebo argónovej N2, Ar plazmy vysokofrekvenčného výboja vo fluidizovanej vrstvě pri tlaku 40 až 100 Pa.The invention relates to a method of activating oxide catalysts on a silica gel support. The essence of the invention lies in direct exposing the activated catalyst to effect low temperature nitrogen or argon N2, Ar plasma high frequency fluidized bed discharge at 40 up to 100 Pa.
Description
(54) Sposob plazmatickej aktivácie wolframových, alebo molybdenových oxidových katalyzátorov(54) A method of plasma activation of tungsten or molybdenum oxide catalysts
22
Vynález sa týká sposobu aktivácie oxidových katalyzátorov na silikagélovom nosiči. Podstata vynálezu spočívá v priamcm vystavení aktivovaného katalyžátora účinkom nízkoteplotně] dusíkovej alebo argónovej N2, Ar plazmy vysokofrekvenčného výboja vo fluidizovanej vrstvě pri tlaku 40 až 100 Pa.The invention relates to a method of activating oxide catalysts on a silica gel support. SUMMARY OF THE INVENTION The present invention is based on the direct exposure of the activated catalyst to low temperature nitrogen or argon N 2 , Ar plasma of a high frequency discharge in a fluidized bed at a pressure of 40 to 100 Pa.
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Vynález sa týká spůsobu plazmatickej aktivácie volfrámových alebo molybdenových oxidových katalyzátorov na silikagélovom nosiči pre disproporcipnačné reakcie.The invention relates to a process for the plasma activation of tungsten or molybdenum oxide catalysts on a silica gel support for disproportionate reactions.
Aktivácia katalyzátora pře disproporcionačné reakcie spočívá v jeho vyhriatí na pracovnú teplotu v prúde N2 po dobu 30 minút a následkom působení alkénu při pracovnej teplote do ustálenia aktivity, t. j. cca 100 minút. Postup slúži k odstráneniu katalytických jedov a vytvoreniu aktívnych centier znížením energie d-orbitálov kovov ich interakciou s nezaplněnými — orbitálmi ligandov. Příklady aktivácie a ich variácie možno nájsť v dostupnej literatúre, ako napr. F. Adámek: Štúdium dispropoircionácie propenu na heterogénnych katalyzátorech, Kandidátská dizertačná práca, Bratislava 1977, J. Horák, J. Pasek: Návrh priemyselných chemických reaktorov z laboratórnych dat, SNTL, Praha 1980.Activation of the catalyst for the disproportionation reaction consists in its heating to the working temperature in the stream of N 2 for 30 minutes and the action of the alkene at the working temperature until the activity stabilizes, i.e. about 100 minutes. The procedure serves to remove catalytic poisons and create active centers by reducing the energy of the metal d-orbital by interacting with the unfilled - orbital ligand. Examples of activation and variations thereof can be found in the available literature, such as e.g. F. Adamek: Study of Propene Dispropoircionation on Heterogeneous Catalysts, Candidate Dissertation, Bratislava 1977, J. Horak, J. Pasek: Design of Industrial Chemical Reactors from Laboratory Data, SNTL, Prague 1980.
Nevýhodou klasickej aktivácie je dlhá doba přípravy, vysoká spotřeba energie (pracovná teplota disproporcionačných reaktorov s oxidovými katalyzátoirmi je cca 400 °C] a značná spotřeba plynov.The disadvantages of classical activation are long preparation times, high energy consumption (working temperature of disproportionation reactors with oxide catalysts is about 400 ° C) and considerable consumption of gases.
Uvedené nedostatky v p-odstatnej miere odstraňuje sposob podlá vynálezu, ktorého podstata spočívá v tom, že na katalyzátor sa působí nízkoteplotnou dusíkovou alebo argonovou plazmou vysokofrekvenčného výboja o frekvencii 10 až 15 MHz, výhodné 12 MHz vo fluidizovanej vrstvě pri tlaku 40 až 100 Pa, prietoku 2 až 3,5.10 -4 m . s“1 a teplote neutrálnych častíc plazmy 75 až 150 stupňov Celsia po dobu 30 až 120 s, výhodné 40 s.The above-mentioned drawbacks are eliminated by the method according to the invention, characterized in that the catalyst is treated with a low-temperature nitrogen or argon plasma of a high-frequency discharge having a frequency of 10-15 MHz, preferably 12 MHz in a fluidized bed at a pressure of 40 to 100 Pa. flow rate 2 to 3.5.10 -4 m. s -1 and a neutral plasma particle temperature of 75 to 150 degrees Celsius for 30 to 120 s, preferably 40 s.
Sposob aktivácie oxidových katalyzátorov v nízkoteplotnej plazme je založený na súčasnom vplyve všetkých zložiek plazmy (elektrony, metastabily, ióny, teplo, fotochemické působenie) na katalyzátor nanesený na SiO2 nosiči. Výsledkom posobenia je redukcia oxidov, změna štruktúry povrchu silikagélu, predovšetkým odstránenie časti OH skupin, vody a siloxánových vazieb a změna distribúcie oxidov na povrchu a v póroch katalyzátora.The way of activation of oxide catalysts in low temperature plasma is based on the simultaneous influence of all plasma components (electrons, metastabiles, ions, heat, photochemical action) on the catalyst supported on SiO 2 support. The effect of the deposition is to reduce the oxides, change the surface texture of the silica gel, in particular to remove part of the OH groups, water and siloxane bonds, and to change the distribution of oxides on the surface and in the pores of the catalyst.
Výhody spůsobu aktivácie oxidových katalyzátoirov sú v skrátení aktivačnej periody přípravy katalyzátora až o 2/3 dosiahnutí rovnovážného stupňa premeny pri niž32 ších hodnotách priestorového času, čo umožňuje zvýšiť výťažnosť disproponclonačných reaktorov, zvýšení životnosti katalyzátora a potlačení tvorby aktívnych centieir pri dimerizáciu a krakovanie. Zloženie produktov disproporcionácie je viac posunuté ku tvorbě etylénu.The advantages of the method of activating the oxide catalysts are in reducing the activation period of the catalyst preparation by up to 2/3 achieving an equilibrium degree of conversion at lower spatial time values, which allows to increase the yield of disproponcloning reactors, increase catalyst life and suppress formation of active centrices during dimerization and cracking. The composition of the disproportionation products is more shifted to the formation of ethylene.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS844347A CS243932B1 (en) | 1984-06-08 | 1984-06-08 | Method of tungsten or molybdenum oxide catalysts' plasma activation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS844347A CS243932B1 (en) | 1984-06-08 | 1984-06-08 | Method of tungsten or molybdenum oxide catalysts' plasma activation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS434784A1 CS434784A1 (en) | 1985-09-17 |
| CS243932B1 true CS243932B1 (en) | 1986-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS844347A CS243932B1 (en) | 1984-06-08 | 1984-06-08 | Method of tungsten or molybdenum oxide catalysts' plasma activation |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS243932B1 (en) |
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1984
- 1984-06-08 CS CS844347A patent/CS243932B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS434784A1 (en) | 1985-09-17 |
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