US2014357916A1PendingUtilityA1
Rhenium Promoted Catalyst
Est. expiryMay 31, 2030(~3.9 yrs left)· nominal 20-yr term from priority
B01J 29/076B01J 29/16C07C 2529/08B01J 29/26C07C 2529/06C07C 6/06B01J 29/83B01J 29/85Y02P20/584C07C 6/12Y02P20/50C07C 2523/36C07C 2523/20Y02P20/52B01J 38/12B01J 29/90B01J 38/14B01J 2229/20B01J 37/0203B01J 38/10C07C 2529/18
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Claims
Abstract
A group V metal/rhenium-modified molecular sieve catalyst can be used in hydrocarbon conversion reactions. Embodiments can provide a toluene conversion of at least 30 wt % with selectivity to benzene above 40 wt % and to xylenes above 40 wt % and non-aromatics selectivity of less than 2.0 wt %.
Claims
exact text as granted — not AI-modified1 . A catalyst comprising:
a molecular sieve catalyst containing a group V metal and rhenium; wherein the molecular sieve catalyst is a zeolite, a faujasite, a crystalline silicoaluminophosphate (SAPO), or an aluminophosphate (ALPO), and wherein the molecular sieve catalyst contains at least 0.0002 wt % and up to 0.3 wt % of the rhenium based on the total weight of the catalyst.
2 . The catalyst of claim 1 , wherein the rhenium comes from a rhenium precursor comprising one or more rhenium compounds.
3 . The catalyst of claim 2 , wherein the rhenium precursor is selected from the group consisting of water-soluble rhenium compounds.
4 . The catalyst of claim 2 , wherein the rhenium precursor is selected from the group consisting of sodium perrhenate, ammonium perrhenate, and dirhenium decacarbonyl.
5 . The catalyst of claim 1 , wherein the group V metal is niobium.
6 . The catalyst of claim 5 , wherein the niobium comes from a niobium precursor comprising one or more niobium compounds.
7 . The catalyst of claim 6 , wherein the niobium precursor is selected from the group consisting of water-soluble niobium compounds.
8 . The catalyst of claim 6 , wherein the niobium precursor is selected from the group consisting of niobium oxalate and ammonium niobate(V) oxalate.
9 . The catalyst of claim 1 , wherein the molecular sieve catalyst is the zeolite.
10 . The catalyst of claim 1 , wherein the molecular sieve catalyst is the crystalline silicoaluminophosphate (SAPO).
11 . The catalyst of claim 1 , wherein the molecular sieve catalyst is the aluminophosphate (ALPO).
12 . The catalyst of claim 1 , wherein the molecular sieve catalyst contains at least 0.005 wt % niobium based on the total weight of the catalyst.
13 . (canceled)
14 . (canceled)
15 . A process for disproportionation of toluene to benzene and xylene, comprising:
passing a toluene/hydrogen feedstock over a group V metal/rhenium-molecular sieve catalyst at a reaction temperature ranging from 150° C. to 500° C. and a reaction pressure ranging from 200 psig to 800 psig; wherein the molecular sieve catalyst is a zeolite, a faujasite, a crystalline silicoaluminophosphate (SAPO), or an aluminophosphate (ALPO), and wherein the molecular sieve catalyst contains at least 0.0002 wt % and up to 0.3 wt % of the rhenium based on the total weight of the catalyst.
16 . The process of claim 15 , wherein the molecular sieve catalyst is the faujasite.
17 . The process of claim 15 , wherein the group V metal content of the catalyst is from 0.005 wt % to 5.0 wt % based on the total weight of the catalyst.
18 . The process of claim 15 , wherein the rhenium content of the catalyst is from 0.0002 wt % to 1.0 wt % based on the total weight of the catalyst.
19 . The process of claim 15 , wherein the reaction temperature ranges from 300° C.-400° C.
20 . The process of claim 15 , wherein the molecular sieve catalyst is the crystalline silicoaluminophosphate (SAPO).
21 . The process of claim 15 , wherein the hydrogen:toluene molar ratio is between 0.05:1 to 4:1.
22 . The process of claim 15 , wherein the reaction pressure range is between 400 psig to 800 psig.
23 . The process of claim 15 , wherein the molecular sieve catalyst is the aluminophosphate (ALPO).
24 . (canceled)
25 . (canceled)Join the waitlist — get patent alerts
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