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A Pd-Fe-B/γ-Al2O3 Amorphous Alloy Catalyst for Hydrogenation of Chloronitrobenzene to Chloroaniline 认领 引用
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作者 Langsong Si Yajuan Zhao Xing Huang Dandan Li Yuxiang Wang 《Journal of Chemistry and Chemical Engineering》 2010年第9期28-33,共6页
A Pd-Fe-B/γ-Al2O3 amorphous alloy catalyst was prepared by impregnation and chemical reduction with borohydrine aqueous solution. The catalyst was characterized by X-ray diffraction（XRD）, scanning electron microsc... A Pd-Fe-B/γ-Al2O3 amorphous alloy catalyst was prepared by impregnation and chemical reduction with borohydrine aqueous solution. The catalyst was characterized by X-ray diffraction（XRD）, scanning electron microscope（SEM）, differential scanning calorimetry（DSC） and elecdes design suite（EDS） and was used for catalytic hydrogenation of 5-nitro-2-chloro-2＇, 4＇-dimethylbenzenesulfonanilide （NCD）. The amorphous alloy catalyst shows significantly high activity and selectively for hydrogenation of NCD to 5-Amino-2-chloro- 2＇, 4＇-dimethyibenzenesuifonanilide （ACD）. 展开更多
关键词 Amorphous alloy catalytic hydrogenation Pd-Fe-B/γ-Al2O3 supported catalyst.
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Hydrogenation of phenylpyruvic acid to phenylalanine catalyzed by Ni-B/SiO2 认领 引用
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作者 Qunfang Liang Aiqing Zhang Lin Li 《Journal of Natural Gas Chemistry》 2008年第3期303-308,共6页
Phenylalanine(Phe)is a significant amino acid that cannot be synthesized by human themselves but must be taken from environment.It was initially found that the nanosized amorphous Ni-B/SiO2 alloy prepared by the chemi... Phenylalanine(Phe)is a significant amino acid that cannot be synthesized by human themselves but must be taken from environment.It was initially found that the nanosized amorphous Ni-B/SiO2 alloy prepared by the chemical reduction method was an effective catalyst for the preparation of Phe from phenylpyruvic acid(PPA)by amination and hydrogenation.It has been found that the amorphous Ni-B/SiO2 alloy catalyst exhibits superior activity and selectivity to the traditional catalysts Raney Ni and Urushibara nickel.The effects of reaction time,amounts of catalysts and ammonia solution,reaction temperature,and H2 pressure on the reaction have been investigated systematically.The results indicated that the yield of Phe was 97.9%,and the selectivity for Phe reached 98.9%when the reaction was carried out for 3 h at 333 K and 2.0 MPa of H2 with m(Cat.):m(PPA)=0.6:1.0 and n(NH3):n(PPA)=3:1.The catalysts were characterized by XRD,AAS,XPS,BET,and TEM,and the relationship between the catalyst structure and the catalytic activity was discussed in detail.It was found that the reason why Ni-B/SiO2 amorphous alloy catalyst was much more active for the preparation of Phe could be accounted for by the presence of electron-rich Ni due to electron donation from alloying B;the smaller size of Ni-B particles,the larger specific surface area of Ni-B/SiO2. 展开更多
关键词 Ni-B/SiO2 amorphous alloy phenylalanine phenylpyruvic acid hydrogenation catalyst
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载体对负载型Ni-B催化剂催化2-乙基蒽醌加氢制H2O2反应性能的影响 认领 引用 被引量：10
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作者 陈雪莹 乔明华 贺鹤勇 《催化学报》 2011年第2期325-332,共8页
采用还原剂浸渍法将Ni-B非晶态合金负载到SiO2,γ-Al2O3和活性炭(AC)上,以2-乙基蒽醌选择加氢制H2O2为探针反应,系统研究了载体对Ni-B非晶态合金催化剂结构、热稳定性和催化性能的影响.结果表明,将Ni-B负载到载体上后,其晶化温度显著提... 采用还原剂浸渍法将Ni-B非晶态合金负载到SiO2,γ-Al2O3和活性炭(AC)上,以2-乙基蒽醌选择加氢制H2O2为探针反应,系统研究了载体对Ni-B非晶态合金催化剂结构、热稳定性和催化性能的影响.结果表明,将Ni-B负载到载体上后,其晶化温度显著提高,各催化剂热稳定性依次为Ni-B/AC>Ni-B/SiO2>Ni-B/γ-Al2O3;催化剂活性依次为Ni-B/SiO2>Ni-B/γ-Al2O3>Ni-B/AC;羰基加氢选择性依次为Ni-B/AC>Ni-B/SiO2>Ni-B/γ-Al2O3.各催化剂加氢活性差异主要归因于其活性比表面积和载体孔结构的不同;羰基加氢选择性差异主要由催化剂上活性位的均一程度和载体表面性质的不同所致. 展开更多
关键词 镍 硼 非晶态合金 二氧化硅 氧化铝 活性炭 负载型催化剂 2-乙基蒽醌 加氢 过氧化氢
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Hydrogenation of furfuryl alcohol to tetrahydrofurfuryl alcohol on NiB/SiO2 amorphous alloy catalyst 认领 引用
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作者 SONG Yun LI Wei +1 位作者 ZHANG Minghui TAO Keyi 《Frontiers of Chemical Science and Engineering》 2007年第2期151-154,共4页
NiB/SiO2 amorphous alloy catalyst was prepared by power electroless plating method and characterized by induction coupled plasma(ICP),Brunauer–Emmett–Teller method(BET),transmission electron microscope(TEM)and X-ray... NiB/SiO2 amorphous alloy catalyst was prepared by power electroless plating method and characterized by induction coupled plasma(ICP),Brunauer–Emmett–Teller method(BET),transmission electron microscope(TEM)and X-ray diffraction(XRD)techniques.The catalytic perfor-mance of NiB/SiO2 was investigated for the hydrogenation of furfuryl alcohol(FA)to tetrahydrofurfuryl alcohol(THFA).The effects of operational conditions,such as reaction tem-perature,pressure,and stirring rate were carefully studied.The proper conditions were determined as the following:pressure 2.0 MPa,temperature 120°C and stirring rate 550 r/min.A typical result with FA conversion of 99%and THFA selectivity of 100%was obtained under such conditions,which was close to that over Raney Ni. 展开更多
关键词 amorphous alloy NiB/SiO2 hydrogenation furfuryl alcohol(FA) tetrahydrofurfuryl alcohol(THFA)
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