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| | A novel skeletal nickel catalyst (SRNA-4) was used in production of fiber mono-mers. In commercial hydrogenation of aqueous caprolactam, SRNA-4 catalyst was more active than con-ventional Raney Ni catalyst. The permanganate number (PM number) of the hydrogenated product u-sing the former reached 9434s, which was much higher than the PM number 1478s of the hydrogenatedproduct using the latter. The PM number of the final caprolactam product was 30000s with the new cat-alyst, which met the premium grade standa... | | 新型骨架镍催化剂(SRNA-4)用于两种化纤单体的加氢过程中,表现出良好的性能:用于己内酰胺加氢精制工业装置,加氢后产品的高锰酸钾值(PM值)达到9434s,大大高于使用常规Raney Ni催化剂时的1478s,成品己内酰胺的PM值为30000s,达到优级品标准,同时催化剂单耗也有所下降;用于己二腈加氢制己二胺试验装置,与常规Raney Ni相比,转化率提高了约10%,己二胺选择性提高了约1倍。SRNA-4催化剂性能优于常规Raney Ni催化剂的原因是制备过程中采用了急冷和预处理技术,使得催化剂母合金中含有大量的Ni_2Al_3相,抽铝以后形成非常均匀的骨架,比表面积达到145m~2/g,活性组元镍高度分散在骨架上,以非晶态或纳米晶的形式存在。 | | 文摘来源 | |   |
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