化工进展 ›› 2024, Vol. 43 ›› Issue (8): 4421-4431.DOI: 10.16085/j.issn.1000-6613.2023-1200

• 工业催化 • 上一篇    

甲酸为氢源硝基苯转移加氢合成对氨基苯酚

王雨菲1(), 贾宇1, 张议升1, 薛伟1,2, 李芳1,2(), 王延吉1,2,3   

  1. 1.河北工业大学化工学院河北省绿色化工与高效节能重点实验室,天津 300400
    2.天津市本质安全化工技术重点实验室,天津 300400
    3.河北省绿色化学工业产业研究院,河北 沧州 061000
  • 收稿日期:2023-07-14 修回日期:2023-12-10 出版日期:2024-08-15 发布日期:2024-09-02
  • 通讯作者: 李芳
  • 作者简介:王雨菲(1999—),女,硕士研究生,研究方向为绿色化工。E-mail:961283910@qq.com
  • 基金资助:
    国家自然科学基金(U21A20306);河北省自然科学基金(B2022202077)

Synthesis of p-aminophenol by transfer hydrogenation of nitrobenzene using formic acid as hydrogen source

WANG Yufei1(), JIA Yu1, ZHANG Yisheng1, XUE Wei1,2, LI Fang1,2(), WANG Yanji1,2,3   

  1. 1.Hebei Provincial Key Laboratory of Green Chemical Technology and High Efficient Energy Saving, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300400, China
    2.Tianjin Key Laboratory of Chemical Process Safety, Tianjin 300400, China
    3.Hebei Industrial Technology Research Institute of Green Chemical Industry, Cangzhou 061000, Hebei, China
  • Received:2023-07-14 Revised:2023-12-10 Online:2024-08-15 Published:2024-09-02
  • Contact: LI Fang

摘要:

以UiO-66为前体,在N2气氛下焙烧制备了ZrO2@C,以其为载体,利用浸渍法制备了Pd/ZrO2@C催化剂。以Pd/ZrO2@C+SO42-/ZrO2为催化剂,对以甲酸(FA)为氢源、硝基苯(NB)转移加氢合成对氨基苯酚(PAP)的反应进行了研究。通过表征发现,Pd/ZrO2@C载体中的ZrO2为四方相ZrO2,包埋在无定形C中。随着ZrO2@C在空气中焙烧温度的升高和焙烧时间的增加,其C含量和比表面积随之下降,同时Pd颗粒尺寸变大。Pd/ZrO2@C催化剂中Pd以Pd0和Pd2+两种形式存在,且随着C含量的减少,Pd0含量增加,Pd2+含量减少;当Pd0含量明显高于Pd2+,其对PAP的选择性明显下降。在140℃、反应6h的条件下,Pd/ZrO2@C-200-4+SO42-/ZrO2具有较好的催化性能,NB转化率为63.7%,PAP选择性为42.3%。

关键词: 催化, 加氢, 载体, 对氨基苯酚, 甲酸, 硝基苯

Abstract:

With UiO-66 as the precursor, ZrO2@C was prepared by calcination in N2 atmosphere. Then, Pd/ZrO2@C was prepared by impregnation method. In this paper, the catalytic transfer hydrogenation of nitrobenzene (NB) to p-aminophenol (PAP) over Pd/ZrO2@C+SO42-/ZrO2 was studied with formic acid (FA) as hydrogen source. Characterization results showed that tetragonal ZrO2 was present in ZrO2@C and was embedded in amorphous C. With the increase of calcination temperature and time in the air, the C content and specific surface area of ZrO2@C decreased accordingly, while the Pd particle size became larger. Pd in the Pd/ZrO2@C catalyst was in the form of Pd0 and Pd2+. The content of Pd2+ decreased with C content, While the content of Pd0 increased. When the content of Pd0 was higher than that of Pd2+, PAP selectivity decreased obviously. Pd/ZrO2@C-200-4+SO42-/ZrO2 exhibited good catalytic activity at 140℃ for 6h. The conversion of NB was 63.7% and the selectivity of PAP was 42.3%.

Key words: catalysis, hydrogenation, support, p-aminophenol, formic acid, nitrobenzene

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