NITRATE-HYDROGENATION Pd CATALYST PREPARATION METHOD Russian patent published in 2005 - IPC

FIELD: hydrogenation-dehydrogenation catalysts.

SUBSTANCE: preparation of catalyst comprises depositing active components on γ-alumina carrier at stirring, carrier being preliminarily treated with concentrated NaOH solution. Active components are deposited consecutively in three steps. In the first step, preliminarily prepared chitosan in acetic acid solution with KCl solution is deposited for 60-65 min; in the second step, sodium tetrachloropaladate(II) trihydrate Na₂PdCl₄·3H₂O solution is deposited for 60-65 min; and, in the third step, hydrazine hydrate solution as reducing agent is added for 180-240 min. After each step, resulting suspension is filtered off, washed, and dried at 293-303K for 1-2 h in vacuum. Catalyst can be used in chemical industry and in processing of industrial and household wastes.

EFFECT: enhanced nitrate hydrogenation efficiency.

6 cl, 1 dwg, 6 ex