A process for cracking olefins to produce propylene, ethylene, or both, includes providing a feed stream that includes mixed butenes and contacting the feed stream with a cracking catalyst at reaction conditions that cause at least a portion of the mixed butenes in the feed stream to react to form propylene, ethylene, or both. The cracking catalyst includes zeolite particles formed from shape selective zeolite particles and an alumina binder. The cracking catalyst further includes at least one transition metal oxide impregnated onto the zeolite particles, where the at least one transition metal oxide can be iron oxide, nickel oxide, or a combinations of these. The cracking catalyst with the iron oxide, nickel oxide, or both increases conversion of mixed butenes to propylene, ethylene, or both alone or in combination with a metathesis upstream of the cracking catalyst, as compared to conventional cracking catalysts.

Disclosed are processes for conversion of a feedstock comprising C.sub.8+ aromatic hydrocarbons to lighter aromatic products in which the feedstock and optionally hydrogen are contacted in the presence of the catalyst composition under conversion conditions effective to dealkylate and transalkylate said C.sub.8+ aromatic hydrocarbons to produce said lighter aromatic products comprising benzene, toluene and xylene. The catalyst composition comprises a zeolite, a first metal, and a second metal, and is treated with a source of sulfur and/or a source of steam.

Set forth herein is a Fischer-Tropsch catalytic system that allows for the efficient and selective conversion of syngas to useful hydrocarbons (nC.sub.4-nC.sub.24) as well as heavy alcohols (nC.sub.1-nC.sub.9) under ambient conditions. The instantly disclosed catalytic system is more practical and scalable than other known Fischer-Tropsch catalytic systems. Also set forth herein new catalysts which comprise supported metal-oxide-based catalysts. These catalysts are useful for the conversion of syngas into liquid hydrocarbon fuels under ambient reaction conditions. The instantly disclosed catalytic system can be made in a one-pot high mass production method, which is commercially practical and scalable. A variety of reaction products can be produced by making minor adjustments to the processes disclosed herein, e.g., by adjusting catalyst composition, reaction temperature and/or reaction pressure. The instantly disclosed process(es) produce Fischer-Tropsch products, heavy hydrocarbons (e.g., paraffin's, olefins, and their derivatives), and alcohols.

Disclosed are processes for conversion of a feedstock comprising C.sub.8+ aromatic hydrocarbons to lighter aromatic products in which the feedstock and optionally hydrogen are contacted in the presence of the catalyst composition under conversion conditions effective to dealkylate and transalkylate said C.sub.8+ aromatic hydrocarbons to produce said lighter aromatic products comprising benzene, toluene and xylene. The catalyst composition comprises a zeolite, a first metal, and a second metal, and is treated with a source of sulfur and/or a source of steam.

Disclosed are processes for rejuvenating catalysts comprising at least one Group 10 metal and a microporous crystalline metallosilicate, and hydrocarbon conversion processes including such rejuvenation processes. In an aspect, the rejuvenation process comprises contacting a deactivated catalyst comprising at least one Group 10 metal and a microporous crystalline metallosilicate with an oxygen-containing gaseous stream under conditions comprising a temperature ranging from about 250° C. to about 375° C. and a pressure of up to about 100 bar. In a further aspect, the rejuvenation process comprises contacting a deactivated catalyst comprising at least one Group 10 metal, at least one rare earth metal, and a microporous crystalline metallosilicate with an oxygen-containing gaseous stream under conditions comprising a temperature ranging from about 250° C. to about 500° C. and a pressure of up to about 100 bar.

A method of making BTX (benzene, toluene, xylene) compounds by feeding a heavy reformate stream to a reactor, where the reactor includes a composite zeolite catalyst, that contains a mixture of a desilicated mesoporous mordenite and ZSM-5, and in which the desilicated mesoporous mordenite, the ZSM-5, or both, comprise one or more impregnated metals. The composite zeolite catalyst is able to catalyze the transalkylation reaction and the dealkylation reaction simultaneously to produce the BTX compounds.

The present disclosure provides an aromatization catalyst, a preparation method, a regeneration method and an aromatization method thereof. The preparation method comprises steps of: mixing a zeolite molecular sieve with a binder to obtain a catalyst precursor; the catalyst precursor is successively subjected to an ion exchange modification and a first modification treatment, and then subjected to a hydrothermal treatment, and further subjected to active metal loading and a second modification treatment, to obtain the aromatization catalyst. The aromatization catalyst has good carbon deposition resistance and high aromatization activity, and enables an aromatization reaction to be completed under mild conditions, and has high aromatic selectivity, and the liquid yield is above 98.5%.

The present invention refers to a process for oligomerization of acetylene in the presence of hydrogen and a solid catalyst.

The present discloses an aromatization catalyst, preparation process and application thereof and a low-carbon olefin aromatization process. The aromatization catalyst comprises a microporous material, a binder and a modifier; the microporous material is a zeolite molecular sieve, the binder is alumina, the modifier is phosphorus, and the molar ratio of the aluminum element in the binder to the phosphorus element is more than or equal to 1 and less than 5; the ratio of the acidity of the strongly acidic sites to the acidity of the weakly acidic sites of the olefin aromatization catalyst is less than 1.

The present invention provides a catalyst composition comprising rare earth exchanged USY zeolite (REUSY); pentasil zeolite; phosphorous compound; clay, silica, alumina, and spinel to enhance the catalytic activity and selectivity for light olefins in FCC operation conditions. The present invention also provides a process for the preparation of Light olefin enhancing catalyst composition with high propylene yield and coke selectivity.