应用化学 ›› 2025, Vol. 42 ›› Issue (8): 1135-1143.DOI: 10.19894/j.issn.1000-0518.250119

• 研究论文 • 上一篇    下一篇

H2O2法生产水合肼工艺中乙酰胺-乙酸铵催化体系的再生转化

简光辉1, 杨帆2(), 白红鑫2, 王洋2, 贾立明2, 任保轶1   

  1. 1.沈阳化工大学理学院,沈阳 110000
    2.中国石化(大连)石油化工研究院有限公司,大连 116000
  • 收稿日期:2025-03-20 接受日期:2025-06-23 出版日期:2025-08-01 发布日期:2025-08-11
  • 通讯作者: 杨帆
  • 基金资助:
    辽宁省科技计划联合计划项目(2024JH2/102600226)

Regeneration and Conversion of the Acetamide-Ammonium Acetate Catalytic System in the H2O2-Based Hydrazine Hydrate Production Process

Guang-Hui JIAN1, Fan YANG2(), Hong-Xin BAI2, Yang WANG2, Li-Ming JIA2, Bao-Yi REN1   

  1. 1.College of Science,Shenyang University of Chemical Technology,Shenyang 110000,China
    2.Sinopec (Dalian) Petrochemical Research Institute,Dalian 116000,China
  • Received:2025-03-20 Accepted:2025-06-23 Published:2025-08-01 Online:2025-08-11
  • Contact: Fan YANG
  • About author:yangfan.fshy@sinopec.com
  • Supported by:
    the Joint Project of Science and Technology Planning of Liaoning Province(2024JH2/102600226)

摘要:

为研究H2O2法水合肼制备技术中酰胺催化剂的再生转化回用工艺,考察了乙酸铵脱水生成乙酰胺反应的反应方式,以及反应温度、反应时间和氨气流量等工艺条件对反应平衡和收率的影响。 结果表明,反应过程联用精馏操作能显著提高反应效率,在反应温度160 ℃,氨气流速300 mL/min,反应时间3~4 h的工艺条件下,乙酰胺的收率可达到60%以上(质量分数≥80%)。 进一步利用连续化反应精馏装置,进行丁酮连氮合成后水相进行催化剂再生转化实验,进料量为760.0 g/h,氨气流量为650 mL/min,回流比为0.1。 反应体系稳定后塔顶温度93 ℃,出料554.4 g/h; 塔釜温度168 ℃,出料回收催化剂248.7 g/h,乙酰胺收率为60.74%(质量分数为83.61%)。

关键词: H2O2法, 水合肼, 催化剂回用, 乙酸铵脱水, 乙酰胺, 反应精馏

Abstract:

In order to study the recycle process of amide catalyst in the production of hydrazine hydrate by H2O2 method, the effects of reaction form, temperature, time, and ammonia flow rate process conditions on reaction equilibrium and acetamide yield were investigated for the dehydration of ammonium acetate to acetamide. The results showed that adopting a distillation reactor can significantly improve the reaction efficiency. The yield of acetamide can reach over 60% with a mass fraction (w) of no less than 80% after 3~4 h of reaction at 160 ℃, 300 mL/min ammonia flow rate. In addition, a continuous distillation experiment was conducted. The conditions were as follows: the introduction of the aqueous phase from methyl ethyl ketazine synthesis was into the reactor at a rate of 760.0 g/h, an ammonia flow rate was 650 mL/min, and a reflux ratio was 0.1. After the system stabilizes, the temperature of head was 93 ℃, and 554.4 g/h of distillate were collected overhead; The temperature of the boiler was 168 ℃, and 248.7 g/h of recycled catalyst were obtained by draining the boiler which the mass fraction of acetamide is 83.61%.

Key words: H2O2 method, Hydrazine hydrate, Recycle of catalyst, Dehydration of ammonium acetate, Acetamide, Reactive distillation

中图分类号: