| 主权项 |
1. A process for preparing a naphtha aromatization catalyst comprising:
preparing a detemplated germanium ZSM-5 material from a germanium ZSM-5 material containing a templating agent by a) or b)
a) detemplating germanium ZSM-5 material containing the templating agent under a detemplating time/temperature protocol sufficient to remove all or substantially all of the templating agent in the germanium ZSM-5 material to form the detemplated germanium ZSM-5 material, where the detemplating time/temperature protocol includes a detemplating time period between 1 hour and 12 hours at a detemplating temperature between 400° C. and 600° C.; orb) adding between 20 wt. % to 60 wt. % of a binder composition to the germanium ZSM-5 material containing the templating agent to form a bound germanium ZSM-5 material, shaping the bound germanium ZSM-5 material, and calcining the bound germanium ZSM-5 material for a time period between 1 hour and 12 hours at a calcining temperature between 400° C. and 600° C. to form the detemplated germanium ZSM-5 material; and thereafter, performing steps (i) and (ii) in any order
(i) ion-exchanging the detemplated germanium ZSM-5 material with a cesium (Cs) containing solution, where said step of ion-exchanging is performed at an ion-exchanging temperature between room temperature and 100° C.;(ii) impregnating the detemplated germanium ZSM-5 material with platinum (Pt); and forming the naphtha aromatization catalyst by heating according to I) and II)
I) heating the detemplated germanium ZSM-5 material immediately after step (i) according to a cesium heating time/temperature protocol, where the cesium heating time/temperature protocol includes a cesium heating time between 1 hour and 12 hours at a cesium heating temperature from 250° C. to 300° C., and heating the detemplated germanium ZSM-5 material immediately after step (ii) according to a platinum heating time/temperature protocol, where the platinum heating time/temperature protocol includes a platinum heating time between 1 hour and 12 hours at a platinum heating temperature ranging from 250° C. to less than 500° C. to form the naphtha aromatization catalyst; orII) after performing both steps (i) and (ii), heating the detemplated germanium ZSM-5 material according to a cesium-platinum heating time/temperature protocol to form the naphtha aromatization catalyst, where the cesium-platinum heating time/temperature protocol includes a cesium-platinum heating time between 1 hour and 12 hours at a cesium-platinum temperature ranging from 250° C. to less than 500° C.; with the proviso that if the process is performed using step (a), the following additional steps (1) and (2) must be performed after step (a)
(1) adding between 20 wt. % to 60 wt. % of the binder composition to the detemplated germanium ZSM-5 material and shaping the detemplated germanium ZSM-5 material; and,(2) calcining the detemplated germanium ZSM-5 material from step (1) according to a bound calcining time/temperature protocol including a bound calcining time period between 1 hour and 12 hours at a bound calcining temperature less than or equal to 500° C.; and wherein the binder composition comprises
a solid binder and a colloidal binder having particles between 10 nm and 30 nm, orthe solid binder and a mixture of colloidal binders including at least 10 wt. % of a first colloidal binder having particles between 10 nm and 30 nm and the remainder being a second colloidal binder having particles less than 10 nm. |
