Pretreatment of porous metal oxide catalysts for use in dehydrogenation and other reactions
AssigneesBASF SE, The Regents of the University of California
InventorsJoseph C. DELLAMORTE, Carlos LIZANDARA PUEYO, Craig Jon CAIN-BORGMAN, Enrique IGLESIA, Junnan SHANGGUAN
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Abstract
Methods of activating and/or reactivating a catalyst composition comprising a porous metal oxide (MOx) catalyst are disclosed. Methods of catalyzing a reaction using a catalyst composition comprising a porous metal oxide catalyst activated and/or reactivated by such a method are also disclosed.
Claims24
A method of activating and/or reactivating, via a surface cleaning reagent, a catalyst composition comprising a porous metal oxide (MOx) catalyst, wherein:
- the surface cleaning reagent possesses at least one of the following characteristics:
- possesses reactivity with one or more bound species derived from CO2 and/or H2O via a stoichiometric reaction;
- does not lead to one or more reactions that form a surface titrant of a Lewis acid-base pair;
- and/or
- can desorb from a surface of the porous metal oxide catalyst without leaving behind surface debris that can irreversibly titrate an M-O active site of the porous metal oxide catalyst;
- and further wherein:
- if the porous metal oxide catalyst is ZrO2, then the surface cleaning reagent is not dimethyl ether or propylene.
A method of activating and/or reactivating, via a surface cleaning reagent, a catalyst composition comprising a porous metal oxide (MOx) catalyst, wherein:
- the surface cleaning reagent is chosen from alcohols, ketones, carboxylates, acids, esters, ethers, hemiacetals, hemiketals, acetals, ketals, orthoesters, orthocarbonates, organic acid anhydrides, and combinations thereof;
- and further wherein:
- if the porous metal oxide catalyst is ZrO2, then the surface cleaning reagent is not dimethyl ether or propylene.
A method of activating and/or reactivating, via a surface cleaning reagent, a catalyst composition comprising a porous metal oxide (MOx) catalyst, wherein:
- the surface cleaning reagent comprises at least one compound chosen from ROH, RCOR′, RCHO, ROCOOR′, RCOOH, RCOOR′, R2CH(OR1)(OH), RC(OR″)(OH)R′, RCH(OR′)(OR″), RC(OR″)(OR′″)R′, RC(OR′)(OR″)(OR′″), C(OR)(OR′)(OR″)(OR′), and R1(CO)O(CO)R2, wherein each of R, R′, R″, R′″, R1, and R2 is independently chosen from alkyl, alkenyl, alkynyl, and aryl groups;
- and further wherein:
- if the porous metal oxide catalyst is ZrO2, then the surface cleaning reagent is not dimethyl ether or propylene.
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Dependencies are inferred from the claim text.