| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 07.00 |
| PATENT ASSIGNEE | Air Products & Chemicals |
| PATENT CLAIMS |
In a process for prepg piperazine by passing amine compd over pentasil-type zeolite at elev T, the amine compd being an ethanolamine, an ethyleneamine, piperazine, morpholine or mixt., the IMPROVEMENT which comprises - Using pentasil-type zeolite in H or NH4 form which has been treated with surface passivating agent which is Si-contg compd that at least partially & permanently deactivates the external sites of the zeolite catalyst for acid catalyzed reac tions thereby improving selectivity |
| PATENT PHOTOCOPY | Available on request |
|
Want more information ? Interested in the hidden information ? Click here and do your request. |