一种连续制备高纯度三氟乙酰氯的工艺方法
By combining a reactor with a distillation column, unreacted CFC-113a and sulfur trioxide were separated and recovered, solving the problems of low purity and complex process of trifluoroacetyl chloride, and realizing the continuous preparation of high-purity trifluoroacetyl chloride.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI RES INST OF CHEM IND CO LTD
- Filing Date
- 2023-08-30
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies make it difficult to continuously prepare high-purity trifluoroacetyl chloride, resulting in low product purity and complex processes, which increases the difficulty of subsequent trifluoroacetic acid purification.
CFC-113a and sulfur trioxide are catalytically reacted in a reactor to produce trifluoroacetyl chloride and sulfuryl chloride reaction gas. The gas is then compressed and sent to a distillation column for separation. High-purity trifluoroacetyl chloride is collected from the top of the column, while unreacted raw materials are collected from the side stream and returned to the reactor. The distillation column is equipped with a dedicated liquid collection-redistribution device and high-efficiency separation packing, and the operating conditions are optimized to improve purity.
The purity of trifluoroacetyl chloride reached over 99.9%, reducing raw material loss and energy consumption, and simplifying the process.
Smart Images
Figure CN117142948B_ABST