摘要
以80%的水合肼为还原剂,Fe(OH)3/C为催化剂,还原4-硝基二苯胺得到4-氨基二苯胺,通过质谱和红外光谱表征了目标产物结构,通过液相色谱测定了产物纯度。较佳工艺条件为:4-硝基二苯胺用量0.05mol,Fe(OH)3负载量约5%的Fe(OH)3/C复合催化剂用量0.45g,水合肼5mL,反应温度80℃,反应时间60min,4-氨基二苯胺的收率可达98.4%。研究表明,以Fe(OH)3为主催化剂,酸处理过的活性炭为助剂,4-硝基二苯胺可被水合肼高效还原为4-氨基二苯胺,产品收率和纯度较高,工艺过程清洁环保。
4-Aminodiphenylamine was prepared through the reduction of 4-nitrosodiphenylamine with hydrazine hydrate as reducer and Fe(OH)3/C as catalyst.The chemical structures of the target product were characterized by MS and IR,and the purity was determined by LC.The yield of 4-aminodiphenylamine could be up to 98.4 % under the following reaction conditions:dosage of 4-nitrodiphenylamine was 0.05 mol,composite catalyst (Fe(OH)3/C) with the loading of Fe(OH)3 about 5% was 0.45 g,hydrazine hydrate was 5.0 mL and reacted at 80 ℃ for 1 h.The results show that composite catalyst of Fe(OH)3/C,with Fe(OH)3 as main catalyst and acid treated activated-carbon as assistant catalyst,is a efficient catalytic system for the reduction of 4-nitrosodiphenylamine to obtain 4-aminodiphenylamine with high yield and high purity under the conditions of clean process.
出处
《精细石油化工》
CAS
CSCD
北大核心
2014年第2期25-28,共4页
Speciality Petrochemicals
基金
湖北省教育厅科研计划项目(B2013240)
武汉科技大学绿色制造与节能减排科研项目(B1205)
关键词
4-硝基二苯胺
4-氨基二苯胺
催化还原
水合肼
4-nitrodiphenylamine
4-aminodiphenylamine
catalytic reduction
hydrazine hydrate