摘要:
This invention relates to a catalytic oligomerization process using a catalyst comprising an acidic solid. The acidic solid may comprise a Group IVB metal oxide, such as zirconia, modified with an oxyanion of a Group VIB metal, such as tungsten. The oligomers produced by this process may be hydrogenated to produce thermally stable lubricants and lubricant additives, gasoline and diesel.
摘要:
A process for a shape selective hydrocarbon conversion such as toluene disproportionation, involves contacting a reaction stream under conversion conditions with a catalytic molecular sieve which has been preselectivated by agglomerating with an organosilicon compound.
摘要:
A synthetic crystalline zeolite, MCM-49, has in its as-synthesized form an X-ray diffraction pattern including values substantially as set forth in Table (I).
摘要:
There is provided a method for preparing an acidic solid comprising a Group IVB metal oxide modified with an oxyanion of a Group VIB metal. An example of this acidic solid is zirconia, modified with tungstate. This modified solid oxide may be used as a catalyst, for example, to isomerize C4 to C8 paraffins. The modified solid oxide is prepared by co-precipitating the Group IVB metal oxide along with the oxyanion of the Group VIB metal.
摘要:
In a process for the selective disproportionation of toluene to para-xylene, single-pass para-xylene product levels of over 90 % coupled with a toluene conversion of at least 15 % are achieved using a molecular sieve catalyst treated with a silicon-containing compound prior to and/or during at least part of the disproportionation process.
摘要:
The process comprises the ring-opening of aromatics and isomerization of aliphatics. The feedstream (10) comprises hydrocarbons having 6 carbon atoms. The process involves the use of a recycle stream (62) containing a source of chlorine. The process uses two reactors in series wherein the first reactor (20) contains a ring-opening catalyst while the second reactor (40), downstream of the first reactor, contains an isomerization catalyst wherein aliphatics are isomerized.
摘要:
A feedstock containing one or more C9+ aromatic compounds, and optionally toluene, is converted over a catalyst comprising a zeolite possessing a Constraint Index of 1 to 3 to provide a product which contains substantial amounts of benzene and xylene(s).
摘要:
The process comprises the ring-opening of aromatics and isomerization of aliphatics. The feedstream (10) comprises hydrocarbons having 6 carbon atoms. The process involves the use of a recycle stream (62) containing a source of chlorine. The process uses two reactors in series wherein the first reactor (20) contains a ring-opening catalyst while the second reactor (40), downstream of the first reactor, contains an isomerization catalyst wherein aliphatics are isomerized.
摘要:
In a process for modifying the shape selectivity of an aluminosilicate zeolite catalyst having a silica to alumina molar ratio less than 500, the catalyst is exposed to at least two ex situ selectivation sequences, wherein each ex situ selectivation sequence includes the steps of contacting the catalyst with a selectivating agent, normally an organosilicon compound, in a carrier and subsequently calcining the catalyst.