摘要:
The invention relates to a process of the oxidative dehydrogenation of an alkane containing 2 to 6 carbon atoms and/or the oxidation of an alkene containing 2 to 6 carbon atoms, wherein a gas stream comprising oxygen and the alkane and/or alkene is fed to the inlet of a reactor comprising a reactor inlet, a catalyst bed and a reactor outlet and is contacted with a mixed metal oxide catalyst containing molybdenum, vanadium, niobium and optionally tellurium in the catalyst bed, and wherein the gas stream coming out of the reactor outlet comprises oxygen.
摘要:
A process comprising catalytically converting ethane to ethylene and acetic acid in the presence of oxygen at a temperature of 450° C. or less in the gas phase wherein the catalyst has the empirical formula MoVaNbbTecZdOn.
摘要:
A new family of crystalline metal oxide compositions have been synthesized. These compositions are described by the empirical formula: AnMM'xMyOp where A is an alkali metal cation, ammonium ion and mixtures thereof, M is niobium or tantalum, M' is tungsten, molybdenum, or mixtures thereof. M' is vanadium, tantalum, niobium, titanium, tin indium, gallium, aluminum, bismuth, antimony, tellurium and mixtures thereof. M' is an optional metal. These compositions are characterized by having an x-ray diffraction pattern having at least one peak at a d spacing of about 3.9Å. A hydrothermal synthesis procedure as well as hybrocarbon conversion processes using the composition are also disclosed.
摘要:
This invention is a method for lowering the benzene content in a gasoline base material in which hydrogenation and isomerization can take place without separating benzene from the gasoline base material and formation of decomposition products with a carbon number less than or equal to 4 can be suppressed. In this method, when benzene or a benzene-containing hydrocarbon is hydrogenated and isomerized in the presence of a solid super acid catalyst, benzene in the gasoline base material is efficiently converted to methylcyclopentane. The amounts of decomposition products with a carbon number less than or equal to 4 generated by the method is very small. Furthermore, benzene content can be reduced to less than 0.01%.
摘要:
A method for converting methane to higher hydrocarbon product by contacting methane with a contact solid which comprises a reducible metal oxide which when contacted with methane at a temperature within the range of about 500 to 1000oC is reduced and produces higher hydrocarbon products and water; and a promoting amount of at least one halogen or chalcogen component.
摘要:
The invention relates to a process for preparing a catalyst, a catalyst being provided in the form of a metal oxide catalyst comprising at least one element selected from the group consisting of Mo, Te, Nb, V, Cr, Dy, Ga, Sb, Ni, Co, Pt and Ce. According to the invention, it is provided that the catalyst K is subjected to an aftertreatment to increase the proportion of the M1 phase, the catalyst K being contacted with steam at a pressure below 100 bar and/or being contacted with oxygen to obtain an aftertreated catalyst K'. The invention further relates to a catalyst K' prepared by the process and to a process for oxidative dehydrogenation with a catalyst K' according to the invention.
摘要:
The present invention relates to a process for isomerizing linear alpha-olefins having from 4 to 8 carbon atoms over a heterogeneous catalyst, wherein the catalyst comprises a hydrogenation metal and a selectivity promoter selected from among selenium and tellurium on a support, and also a process for preparing 1-olefins by a metathesis reaction of 2-olefins with ethene, wherein the 2-olefins are prepared by the above mentioned isomerization process.
摘要:
The invention relates to a method for the oxidative dehydrogenation of ethane. The inventive method is characterized in that it consists of bringing the ethane into contact with the catalyst containing Mo, Te, V, Nb and at least a fifth element A which is selected from Cu, Ta, Sn, Se, W, Ti, Fe, Co, Ni, Cr, Zr, Sb, Bi, an alkali metal, an alkaline-earth metal and a rare earth, in which at least Mo, Te, V and Nb are present in the form of at least one oxide, said catalyst presenting, in calcined form, an X-ray diffractogram with more than ten intense diffraction lines, typically, the most intense lines corresponding to diffraction angles 2⊖ of 7.7° ±0.4, 8.9° ±0.4, 22.1° ±0.4, 26.6° ±0.4, 26.9° ±0.4, 27.1° ±0.4, 28.1° ±0.4, 31.2° ±0.4, 35.0° ±0.4 and 45.06° ±0.
摘要:
Der Katalysator enthält mindestens ein Alkalimetall auf einem Spinell oder Inversspinell als Träger, der mit mindestens einer Verbindung eines Alkalimetalls und/oder Erdkalimetalls dotiert sein kann, wobei das Gewichtsverhältnis Alkalimetall/Träger 0,01 bis 5 und bei Vorliegen einer Dotierung das Gewichtsverhältnis Dotierung/Träger 0,01 bis 5 beträgt. Der Spinell weist dabei die allgemeine Formel (I) und der Inversspinell die allgemeine Formel (II) AB 2 X 4 (I) B(AB)X 4 (II) mit der Bedeutung von A zweiwertiges Metall, B drei- oder vierwertiges Metall, X O, S, Se, Halogen, Pseudohalogen auf, wobei die Ladungen ausgeglichen sind, wobei vorzugsweise A ausgewählt ist aus Mg, Cr, Fe, Zn, Mn, Co, Ni, Cu, Cd, Sn und Gemischen davon, und B ausgewählt ist aus Al, Ga, In, Fe, V, Cr, Ti, Pb, Mn, Co, Rh, Ni, Si und Gemischen davon, und X O ist.