Preparation of 5-Amino Benzimidazolone-2 with Ni-B Catalyst

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Abstract

5-Amino benzimidazolone-2 was prepared by 5-nitro benzimidazolone-2 and hydrogen in autoclave. And this reaction is classified to catalytic hydrogenation reduction. In this research, the Ni-B catalyst was characterized by SEM, XRD and BET, and its catalytic performance for the synthesis of 5-amino benzimidazolone-2 was investigated. XRD shows that Ni-B catalyst is amorphous alloy. And BET shows the specific surface area and pore volume of Ni-B catalyst. By calculating, the specific surface area is 51 m²/g, total entrance is 0.0524 cm³/g. The reaction temperature, the amount of catalyst and catalyst recycling were also studied. At last, the study has shown the optimum reaction conditions: the amount of catalyst is 5.5%~6.6%,the reaction temperature is 180 ℃, the reaction pressure is 2.0 MPa, the reaction time is 8 h, the amount of absolute ethanol is 100 mL as reaction medium. And the yield and purity of the product was up to 92.4% and 99%, respectively.

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	Articles by authors
	Ma Hongqing
	Meng Shuxian
	Feng Yaqing
	Fang Shuo

Keywords： 5-amino benzimidazolone-2； Ni-B catalyst； 5-nitro benzimidazolone-2

Received 2013-12-12;

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Cite this article:

Ma Hongqing, Meng Shuxian, Feng Yaqing, Fang Shuo.Preparation of 5-Amino Benzimidazolone-2 with Ni-B Catalyst[J] Chemcial Industry and Engineering, 2016,V33(1): 40-44

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