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| Number | Title | Issue Date |
| 4423272 | Regeneration of methanol/methyl ether conversion catalysts A process for using hydrogen-containing gas to regenerate a zeolite catalyst comprising at least some crystalline aluminosilicate zeolitic material having pore windows formed by 8-membered rings of oxygen atoms, e.g., ZSM-34, which has been used to promot... | 12/27/1983 |
| 4409132 | Organophosphorus-treated zeolite catalysts for para-selective aromatics conversion A method is provided for treating modified ZSM-5 type zeolite catalysts with a vapor phase organophosphorus reagent such as trimethylphosphite in order to improve the para-selective properties of such catalysts for the conversion of aromatic materials. Th... | 10/11/1983 |
