Catalyst composition comprising con-type zeolite and zsm-5-type zeolite, preparation and process using such composition
View Patent ↗The invention relates to a catalyst composition comprising a) a carrier comprising: (i) of from 5 to 95 wt % of CON type zeolite, (ii) of from 5 to 95 wt % of ZSM-5 type zeolite; and (iii) of from 10 to 60 wt % of inorganic binder; and b) of from 0.001 to 10 wt % one or more metals selected from the group consisting of Group 6-11 of the IUPAC Periodic Table of Elements. The invention further relates to a process for preparing the catalyst composition and to a process for the conversion of an alkylaromatic hydrocarbons containing feedstock using a catalyst prepared by the present process.
1. A catalyst composition comprising:
(a) a carrier comprising (i) CON zeolite in an amount in the range of from 5 to 85 wt %, based on total weight of carrier, (ii) ZSM-5 zeolite in an amount of from 5 to 85 wt %, based on total weight of carrier; and (iii) an inorganic binder in an amount in the range of from 10 to 60 wt %, based on total weight of carrier; and
(b) of from 0.001 to 10 wt % one or more metals selected from the group consisting of Groups 6-11 of the IUPAC Periodic Table of Elements.
2. The catalyst composition according to claim 1 in which the carrier comprises CON zeolite in an amount in the range of from 20 to 85 wt %, based on total weight of carrier.
3. The catalyst composition according to claim 1 in which the carrier comprises ZSM-5 zeolite in an amount of from 10 to 70 wt %, based on total weight of carrier.
4. The catalyst composition according to claim 1 in which the one or more metals comprise molybdenum in an amount in the range of from 1 to 10 wt %, as metal based on total weight of catalyst.
5. The catalyst composition according to claim 1 , wherein the ZSM-5 zeolite has a silica to alumina molar ratio in the range of from 15 to 35.
6. The catalyst composition according to claim 1 , wherein the ZSM-5 zeolite has a number average crystal size in the range of from 50 to 200 nm.
7. A process for preparing the catalyst composition according to claim 1 , comprising the steps of:
(a) mixing the CON zeolite, the ZSM-5 zeolite and the inorganic binder to produce a mixture and extruding the mixture to produce extrudates,
(b) optionally subjecting the extrudates obtained in step (a) to a heat treatment to produce calcined extrudate,
(c) impregnating the extrudates or the calcined extrudates with a solution comprising one or more metals selected from the group consisting of Group 6-11 of the IUPAC Periodic Table of Elements, and
(d) optionally subjecting the impregnated extrudates obtained in step (c) to a heat treatment.
8. A process for the conversion of a feedstock containing alkylaromatic hydrocarbons said process comprising contacting the feedstock with the catalyst of claim 1 .
9. The process according to claim 8 wherein the feedstock comprises toluene and alkylaromatic compounds containing at least 9 carbon atoms in a weight ratio of from 10:90 to 90:10.
10. The process according to claim 8 , wherein the feedstock comprises of from 35 to 75 wt % of toluene and of from 25 to 65 wt % of alkylaromatic compounds containing at least 9 carbon atoms.