Hydrogenation catalyst for producing cyclohexylamine from aniline
A technology of hydrogenation catalyst and cyclohexylamine, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, heterogeneous catalyst chemical elements, etc., can solve the problems of low selectivity and low yield of cyclohexylamine, etc. To achieve the effect of outstanding technical effect
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Embodiment 1
[0051] Modified carrier P / Al 2 o 3 Preparation of:
[0052] (1) Phosphoric acid (H 3 PO 4 ) aqueous solution 180ml impregnated in 1L diameter 6mm, pore volume is 0.92cm 3 / g, the specific surface area is 200cm 2 / g Al 2 o 3 , standing for 24 hours, and drying at 110° C. for 4 hours to obtain the carrier precursor I.
[0053] (2) Calcining the carrier precursor I at 630°C for 5h under a nitrogen gas atmosphere to obtain the modified carrier P / Al 2 o 3 .
[0054] The P content in the carrier was determined to be 1.50 g / L by ICP.
[0055] Preparation of hydrogenation catalyst:
[0056] (i) Cobalt ammonium sulfate containing 2.28g Co ((NH 4 ) 2 Co(SO 4 ) 2 ·6H 2 O) and calcium acetate containing 1.66g Ca (Ca(OAc) 2 ·H 2 O) 200ml of aqueous solution impregnated in P / Al 2 o 3 , to obtain catalyst precursor I;
[0057] (ii) drying at 110° C. for 4 hours to obtain the catalyst.
[0058] The Co content of the catalyst measured by ICP is 2.28g / L, and the Ca content...
Embodiment 2
[0063] Modified carrier P / Al 2 o 3 Preparation of:
[0064] (1) Phosphoric acid (H 3 PO 4 ) aqueous solution 180ml impregnated in 1L diameter 6mm, pore volume is 0.92cm 3 / g, the specific surface area is 200cm 2 / g Al 2 o 3 , standing for 24 hours, and drying at 110° C. for 4 hours to obtain the carrier precursor I.
[0065] (2) Calcining the carrier precursor I at 630°C for 5h under a nitrogen gas atmosphere to obtain the modified carrier P / Al 2 o 3 .
[0066] The P content in the carrier was determined to be 1.50 g / L by ICP.
[0067] Preparation of hydrogenation catalyst:
[0068] (i) Cobalt ammonium sulfate containing 2.28g Co ((NH 4 ) 2 Co(SO 4 ) 2 ·6H 2 O) and ammonium tetrachloroaurate ((NH 4 )AuCl 4 ·3H 2 O) 200ml of aqueous solution impregnated in P / Al 2 o 3 , to obtain catalyst precursor I;
[0069] (ii) drying at 110° C. for 4 hours to obtain the catalyst.
[0070]The Co content of the catalyst was measured by ICP to be 2.28g / L, and the Au cont...
Embodiment 3
[0099] Modified carrier P / Al 2 o 3 Preparation of:
[0100] (1) Ammonium phosphate (NH 4 ) 3 PO 4 ) aqueous solution 180ml impregnated in 1L diameter 6mm, pore volume is 0.92cm 3 / g, the specific surface area is 200cm 2 / g Al 2 o 3 , standing for 24 hours, and drying at 110° C. for 4 hours to obtain the carrier precursor I.
[0101] (2) Calcining the carrier precursor I at 630°C for 5h under a nitrogen gas atmosphere to obtain the modified carrier P / Al 2 o 3 .
[0102] The P content in the carrier was determined by ICP to be 0.80 g / L.
[0103] Preparation of hydrogenation catalyst:
[0104] (i) Cobalt ammonium sulfate containing 2.28g Co ((NH 4 ) 2 Co(SO 4 ) 2 ·6H 2 O) and beryllium acetate (Be(OAc) containing 1.66g Be 2 ·H 2 O) be dissolved in hot water to obtain 200ml of impregnating solution and impregnate in P / Al 2 o 3 , to obtain catalyst precursor I;
[0105] (ii) drying at 110° C. for 4 hours to obtain the catalyst.
[0106] The Co content of the ...
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