Hydroisomerization catalyst
The present disclosure relates to a precursor for a catalytically active material or a catalytically active material comprising platinum, a molecular sieve and a metal oxide support, characterized in at least 80%, 90% or 95% of said platinum being dispersed on said molecular sieve and at least 80%, 90% or 95% of said platinum being dispersed in clusters having a size below 2 nm or 1 nm, as well as a method of producing such materials and process for hydroisomerization involving such materials. The disclosure has the associated benefit of such a catalytically active material being highly active and selective towards hydroisomerization.
1. A material comprising:
platinum,
a molecular sieve,
a metal oxide support selected from the group consisting of alumina, silica, silica-alumina and titania, and
at least 0.5 wt % carbon,
wherein the material is formed by incipient wetness impregnation of an unactivated material with a solution of a platinum salt, the unactivated material comprising said molecular sieve and said metal oxide support, wherein the unactivated material is formed by extruding or pelletizing a support paste formed from said molecular sieve and said metal oxide support,
wherein at least 80% of said platinum of the material being dispersed on said molecular sieve and at least 80% of said platinum of the material being dispersed in clusters having a size below 2 nm, and
wherein the material is a precursor for a catalytically active material, or wherein the material is a catalytically active material formed by activating the precursor material by reduction to produce the catalytically active material which catalyzes a hydroisomerization reaction,
wherein said molecular sieve is EU-2, and wherein said molecular sieve has a silica to alumina ratio from 50 to 200.
2. The material according to claim 1 ,
wherein the platinum of the material has a surface area, wherein the platinum of the material is distributed such that at least 80% of the surface area of the platinum of the material is dispersed on said molecular sieve, and further wherein at least 80% of the surface area of the platinum of the material is found in clusters having a size below 2 nm.
3. The material according to claim 1 ,
wherein the platinum of the material has a mass, wherein the platinum of the material is distributed such that at least 80% of the mass of the platinum of the material is dispersed on said molecular sieve, and further wherein at least 80% of the mass of the platinum of the material is found in clusters having a size below 2 nm.
4. The material according to claim 1 , comprising at least 1 wt % organic additive or compounds derived therefrom.
5. The material according to claim 1 , wherein the material is the precursor for a catalytically active material.
6. A catalytically active material prepared by contacting the precursor for a catalytically active material of claim 5 with a flow of hydrogen at a temperature between 150° C. and 350° C.
7. The material according to claim 2 , comprising at least 1 wt % organic additive or compounds derived therefrom.
8. The material according to claim 2 , wherein the material is the precursor for a catalytically active material.
9. A catalytically active material prepared by contacting the precursor for a catalytically active material of claim 8 with a flow of hydrogen at a temperature between 150° C. and 350° C.
10. The material according to claim 3 , comprising at least 1 wt % organic additive or compounds derived therefrom.
11. The material according to claim 3 , wherein the material is the precursor for a catalytically active material.
12. A catalytically active material prepared by contacting the precursor for a catalytically active material of claim 11 with a flow of hydrogen at a temperature between 150° C. and 350° C.