摘要
以硝基苯、苯胺为单体,季铵碱为相转移主催化剂,碱金属氢氧化物为助催化剂,采用硝基苯法,合成了4-氨基二苯胺。结果表明,在优选单一催化剂的基础上采用了复合催化剂,使有效成分(4-亚硝基二苯胺和4-硝基二苯胺)质量分数大幅度提高,由单一催化剂的70%上升到86%。采用均匀实验设计法,在较大范围内对影响反应的因素进行了优化,其最佳工艺条件为:滴加时间140 m in,保温时间60 m in,反应温度74℃,催化剂加入量75 g,碱金属氢氧化物加入量10 g,催化剂/硝基苯(质量比)2.08∶1.00,试样有效成分质量分数达到95.00%以上。
Using nitrobenzene and phenylamine as monomer,quaternary ammonium hydrate as phase transfer main catalyst,and alkali metal hydroxide as additional catalyst,the 4-aminodiphenylamine was synthesized by nitrobenzene method.The results showed that the mass fraction of effective components(4-nitrosodiphenylamine and 4-nitrodiphenylamine) was increased from 70% to 86% with single catalyst and composite catalyst respectively.The influencing factors of the reaction in the wind range were optimized by uniform design method,and the optimized process conditions were:dripping time 140()min,thermo-insulating time 60()min,reaction temperature 74()℃,catalyst quantity 75()g,alkali metal hydroxide quantity 10()g,m(catalyst)/m(nitrobenzene)(2.08∶)(1.00,)m(alkali metal salt)/m(catalyst) 1.00∶7.50,and the mass fraction of effective components more than 95.00%.
出处
《石化技术与应用》
CAS
2006年第6期464-467,共4页
Petrochemical Technology & Application
关键词
4-氨基二苯胺
合成
催化加氢
复合催化剂
工艺条件优化
4-aminodiphenylamine
synthesis
catalytic hydrogenation
composite catalyst
process condition optimization
