Method for producing cyclohexylamine by hydrogenating aniline
A technology of cyclohexylamine and aniline, which is applied in the field of hydrogenation of aniline to produce cyclohexylamine, can solve the problems of low yield and selectivity of cyclohexylamine, and achieve the effect of improving yield and selectivity
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[0043] [Example 1]
[0044] Modified carrier P / Al 2 O 3 Preparation:
[0045] (1) Phosphoric acid (H 3 PO 4 ) 180ml of aqueous solution immersed in 1L diameter 6mm, pore volume 0.92cm 3 / g, the specific surface area is 200cm 2 / g of Al 2 O 3 It was left standing for 24 hours and dried at 110°C for 4 hours to obtain the carrier precursor I.
[0046] (2) The carrier precursor I was calcined at 630°C for 5 hours under a nitrogen atmosphere to obtain the modified carrier P / Al 2 O 3 .
[0047] The P content in the carrier determined by ICP was 1.48 g / L.
[0048] Preparation of hydrogenation catalyst:
[0049] (i) The ammonium cobalt sulfate containing 2.18g Co ((NH 4 ) 2 Co(SO 4 ) 2 ·6H 2 O) and 200ml of an aqueous solution of lithium acetate (LiOAc) containing 1.88g of Li immersed in P / Al 2 O 3 , To obtain the catalyst precursor I;
[0050] (ii) Drying at 110°C for 4 hours to obtain the catalyst.
[0051] The Co content of the catalyst determined by ICP is 2.18g / L, and the Li content is 1.88g / ...
Example Embodiment
[0055] [Example 2]
[0056] Modified carrier P / Al 2 O 3 Preparation:
[0057] (1) Phosphoric acid (H 3 PO 4 ) 180ml of aqueous solution immersed in 1L diameter 6mm, pore volume 0.92cm 3 / g, the specific surface area is 200cm 2 / g of Al 2 O 3 It was left standing for 24 hours and dried at 110°C for 4 hours to obtain the carrier precursor I.
[0058] (2) The carrier precursor I was calcined at 630°C for 5 hours under a nitrogen atmosphere to obtain the modified carrier P / Al 2 O 3 .
[0059] The P content in the carrier determined by ICP was 1.48 g / L.
[0060] Preparation of hydrogenation catalyst:
[0061] (i) The ammonium cobalt sulfate containing 2.18g Co ((NH 4 ) 2 Co(SO 4 ) 2 ·6H 2 O) and zinc citrate containing 1.88g of Zn (Zn 3 (C 6 H 5 O 7 ) 2 ·2H 2 O) 200ml of aqueous solution immersed in P / Al 2 O 3 , To obtain the catalyst precursor I;
[0062] (ii) Drying at 110°C for 4 hours to obtain the catalyst.
[0063] The Co content of the catalyst determined by ICP is 2.18 g / L and the Zn co...
Example Embodiment
[0091] [Example 3]
[0092] Modified carrier P / Al 2 O 3 Preparation:
[0093] (1) Ammonium phosphate (NH 4 ) 3 PO 4 ) 180ml of aqueous solution immersed in 1L diameter 6mm, pore volume 0.92cm 3 / g, the specific surface area is 200cm 2 / g of Al 2 O 3 It was left standing for 24 hours and dried at 110°C for 4 hours to obtain the carrier precursor I.
[0094] (2) The carrier precursor I was calcined at 630°C for 5 hours under a nitrogen atmosphere to obtain the modified carrier P / Al 2 O 3 .
[0095] The P content in the carrier determined by ICP was 0.80 g / L.
[0096] Preparation of hydrogenation catalyst:
[0097] (i) The ammonium cobalt sulfate containing 2.18g Co ((NH 4 ) 2 Co(SO 4 ) 2 ·6H 2 O) and 200ml of an aqueous solution of potassium acetate (KOAc) containing 1.88g K, immersed in P / Al 2 O 3 , To obtain the catalyst precursor I;
[0098] (ii) Drying at 110°C for 4 hours to obtain the catalyst.
[0099] The Co content of the catalyst determined by ICP is 2.18 g / L, and the K content is ...
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