摘要:
In a process for dehydrogenating alkanes containing 2-5 carbon atoms per molecule in the presence of steam and a catalyst composition comprising IIA and/or IIB metal aluminate, a noble metal and a Group IVA metal oxide, the improvement comprises the step of contacting the catalyst composition, after it has been oxidatively regenerated, with a reducing gas comprising free hydrogen and steam.
摘要:
In a process for dehydrogenating alkanes having 2-5 carbon atoms per molecule in the presence of steam and a catalyst composition comprising Group IIA and/or IIB metal aluminate, Group VIII metal(s) and Group IVA metal compound(s), the improvement comprises the step of pretreating the alkane containing feed with a material comprising a Group IIA and/or Group IIB metal aluminate under non-dehydrogenating conditions.
摘要:
A petroleum cracking catalyst having thereon metals usually found in petroleum, e.g., iron, nickel and vanadium, is modified by addition of potassium to increase significantly the rate of hydrogen production when employing the thus-modified catalyst for cracking of petroleum.
摘要:
The regeneration of cracking catalyst containing both manganese and antimony in a temperature range of 1260.degree.-1280.degree. F. has been found to result in unexpected sharp maximum of the CO.sub.2 /CO ratio in the regenerator off-gas.
摘要:
A hydrocarbon cracking catalyst treated with thallium to passivate thereon contaminating metals, e.g., vanadium, iron and/or nickel is used in a process for cracking a hydrocarbon.
摘要:
A hydrocarbon oil cracking process in which a cracking catalyst employed has been treated with a passivating amount of an antimony tris (hydrocarbyl sulfonate), e.g., antimony tris (p-toluene sulfonate). The catalyst can be a conventional cracking catalyst, e.g., silica/alumina, zeolite, etc. The application can be conducted before and/or after the catalyst has been used to crack a hydrocarbon.
摘要:
Prevention of detrimental effects of metals such as nickel, vanadium and iron on the activity of cracking catalysts is achieved by contacting the cracking catalyst with manganese selenide. The modifying treatment of the catalyst with manganese selenide increases octane rating of the gasoline produced.
摘要:
A novel cracking catalyst, a method of preparing same, and an improved hydrocarbon cracking process are provided wherein the adverse effects of metals such as nickel, vanadium, iron, copper, and cobalt on the cracking catalyst are reduced by contacting the cracking catalyst with a sufficient amount of at least one indium modifier selected from the group consisting of elemental indium and indium compounds free of the element antimony.
摘要:
A novel cracking catalyst, a method of preparing same and an improved hydrocarbon cracking process are provided wherein adverse effects of metals such as nickel, vanadium and iron in the cracking catalyst are precluded or mitigated by contacting the cracking catalyst with at least one treating agent selected from the group consisting of elemental tellurium, oxides of tellurium and compounds convertible to elemental tellurium or oxide thereof during cracking or catalyst regeneration, whereby to said cracking catalyst is added a modifying amount of said treating agent.
摘要:
A cracking catalyst is treated with an antimony tris(dihydrocarbyl phosphite) to passivate contaminating metals whenever these metals have been deposited on the catalyst. Unused or used catalyst can be treated.