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7285512 |
Selective hydrodesulfurization catalyst
This invention relates to a catalyst and process for selectively hydrodesulfurizing naphtha feedstreams using a catalyst comprising at least one hydrodesulfurizing metal supported on a low acidity,...
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7271118 |
Xylenes isomerization catalyst system and use thereof
A catalyst system that exhibits a ratio of ethylene saturation to aromatics ring saturation of greater than 3,500. The catalyst system comprises two components and each component comprises a...
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7247762 |
Process for xylene isomerization and ethylbenzene conversion
A process for the isomerization of xylenes and the conversion of ethylbenzene to benzene and ethane using a catalyst system comprising two catalysts. The first catalyst is unselectivated and...
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7067052 |
Process for the production of reformate having reduced ethylbenzene content
A process for reforming a hydrocarbon feed containing precursors of ethylbenzene, e.g., C 8 isoalkane and/or C 8 isoalkene precursors of ethylbenzene, that results in the formation of reduced...
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6924405 |
Xylene isomerization
A xylene isomerization process is disclosed in which any ethylbenzene in the feed is removed, either by dealkylation or isomerization, in a separate reactor upstream of the xylene isomerization...
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6770792 |
Xylene isomerization
A xylene isomerization process is disclosed in which any ethylbenzene in the feed is removed, either by dealkylation or isomerization, in a separate reactor upstream of the xylene isomerization...
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6689929 |
Process for the production of para-xylene using toluene feeds and pressure swing adsorption
A pressure swing adsorption process to separate para-xylene and ethylbenzene from a C 8 aromatics stream produced by toluene conversion uses a para-selective adsorbent, preferably a non-acidic,...
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6660896 |
Isomerization of ethylbenzene and xylenes
In a process for isomerizing a feed comprising ethylbenzene and a mixture of xylene isomers, the feed is first contacted under xylene isomerization conditions with a first catalyst composition to...
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6600083 |
Para-xylene production process integrating pressure swing adsorption and crystallization
A pressure swing adsorption process to separate para-xylene and ethylbenzene from C 8 aromatics which uses a para-selective, non-acidic, medium pore molecular sieve of the MFI structure type and...
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6504075 |
Small crystal ZSM-5, its synthesis and use
A synthetic porous crystalline material has the structure of ZSM-5 and a composition involving the molar relationship: X 2 O 3 :( n )YO 2 , wherein X is a trivalent element; Y is a tetravalent...
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6362115 |
In-situ generation of p-xylyiene from liquid precursors
A method and apparatus for forming thin polymer layers having low dielectric constants on semiconductor substrates includes in situ formation of p-xylylenes, or derivatives thereof from liquid...
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6180550 |
Small crystal ZSM-5, its synthesis and use
A synthetic porous crystalline material has the structure of ZSM-5 and a composition involving the molar relationship: X 2 O 3 :(n)YO 2 , wherein X is a trivalent element; Y is a tetravalent...
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6086952 |
Chemical vapor deposition of a copolymer of p-xylylene and a multivinyl silicon/oxygen comonomer
A method for forming thin polymer layers having low dielectric constants or semiconductor substrates. In one embodiment, the method includes the vaporization of stable di-p-xylylene, the pyrolytic...
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5998688 |
Xylene isomerization process using toluene co-feed
A method for minimizing the loss of xylenes in an ethylbenzene conversion/isomerization process by adding toluene to the feedstock. The concentration of toluene in the feedstock is increased by...
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5977420 |
Dual-loop xylene isomerization process
A method for increasing the efficiency of xylene isomerization by using a two stage isomerization process. In the first stage of the process, a C 9 + aromatics feedstock is subjected to...
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