一种以HFC-23、CHCl3为原料生产HCFC-22和HCFC-21的方法
By using a series reactor and separation and purification technology, combined with a Cr-doped Al2O3 catalyst and a solid alkali dryer, the problems of high reaction temperature and catalyst carbon buildup in the HFC-23 and CHCl3 fluorine-chlorine exchange reactions were solved, achieving efficient production of HCFC-22 and HCFC-21, improving single-pass conversion rate and selectivity, and reducing equipment load and production risks.
CN122010678BActive Publication Date: 2026-07-17ZHEJIANG XINGTENG CHEM
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG XINGTENG CHEM
- Filing Date
- 2026-04-15
- Publication Date
- 2026-07-17
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Figure CN122010678B_ABST
Abstract
本发明公开了一种以HFC‑23、CHCl3为原料生产HCFC‑22和HCFC‑21的方法，属于氟化工技术领域，提高单程转化率，降低反应积碳速率。以HFC‑23和CHCl3为原料，经过预热混合后送入含有催化剂的第一反应器中进行氟氯交换反应，反应后仍未反应的原料再经冷凝分离以及精馏将原料HFC‑23和CHCl3分离出来，然后送入含有催化剂的第二反应器中继续进行反应；第一反应器和第二反应器中进行氟氯交换反应的反应温度为150～330℃，两个反应器得到的产品利用多步精馏塔进行混合精馏，得到产品HCFC‑22和HCFC‑21。
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