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US 10,377,683 B2Granted
Isomerisation catalyst preparation process
AssigneeShell Oil Company
InventorsCristina Nicoleta Nenu, Bart Pelgrim, Ingrid Maria van Vegchel
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Abstract
A process for preparing an alkylaromatics isomerisation catalyst comprising at least 0.01% wt of platinum on a carrier comprising of from 1 to 9 wt % of ZSM-12 and inorganic binder, which process comprises treating the carrier with an impregnation solution comprising base and an anionic platinum complex which impregnation solution has a pH of from 5.5 to 8; and a process for the isomerisation of alkylaromatics with the help of catalyst thus obtained.
Claims22
A process for preparing an alkylaromatics isomerization catalyst, comprising:
- mixing an amount of ZSM-12 zeolite with an amount of an alumina binder to form a mixture, wherein said ZSM-12 zeolite has an average crystal size in the range of from 30 to 70 nm, a surface area of more than 250 m2/g as measured by nitrogen adsorption, and crystallinity of greater than 94%, and wherein the alumina of said alumina binder has a nitrogen pore volume of at least 0.6 cc/g and an average pore diameter greater than 80 Å;
- shaping said mixture into extrudates;
- without prior calcination of said extrudates, impregnating said extrudates with an impregnation solution comprising a base and an anionic platinum complex to provide impregnated extrudates, wherein said impregnation solution has a pH of from 5.5 to 8;
- drying said impregnated extrudates;
- and
- calcining the dried impregnated extrudates at a calcination temperature in the range of from 300 to 600° C. to provide said alkylaromatics isomerization catalyst;
- wherein said amount of ZSM-12 zeolite and said amount of said alumina binder are such as to provide said alkylaromatics isomerization catalyst that comprises from 1 to 9 wt % ZSM-12 zeolite and more than 50 wt % alumina binder, based on the total weight of said alkylaromatics isomerization catalyst;
- wherein the alkylaromatics isomerization catalyst provides an ethylbenzene conversion of at least 37% wt at a PXate of 95 wt %.
5 more elements
A process for preparing an alkylaromatics isomerization catalyst comprising:
- mixing an amount of ZSM-12 zeolite with an amount of an alumina binder to form a mixture, wherein said ZSM-12 zeolite has an average crystal size in the range of from 30 to 70 nm, a surface area of more than 250 m2/g as measured by nitrogen adsorption, and crystallinity of greater than 94%, and wherein the alumina of said alumina binder has a nitrogen pore volume of at least 0.6 cc/g and an average pore diameter greater than 80 Å;
- shaping said mixture into preformed carrier particles;
- drying said preformed carrier particles;
- calcining the dried preformed carrier particles at a calcination temperature in the range of from 300 to 600° C. to provide dried and calcined preformed carrier particles;
- impregnating said dried and calcined preformed carrier particles with an impregnation solution comprising a base and an anionic platinum complex to provide impregnated preformed carrier particles, wherein said impregnation solution has a pH of from 5.5 to 8;
- drying said impregnated preformed carrier particles;
- and
- calcining the dried impregnated preformed carrier particles at a calcination temperature in the range of from 300 to 600° C. to provide said alkylaromatics isomerization catalyst;
- wherein said amount of ZSM-12 zeolite and said amount of said alumina binder are such as to provide said alkylaromatics isomerization catalyst that comprises from 1 to 9 wt % ZSM-12 zeolite and more than 50wt % alumina binder, based on the total weight of said alkylaromatics isomerization catalyst;
- wherein the alkylaromatics isomerization catalyst provides an ethylbenzene conversion of at least 37% wt at a PXate of 95 wt %.
7 more elements
Dependencies are inferred from the claim text.