气相酰卤水解的反应系统
By designing a series falling film reactor and condenser, the problems of insufficient temperature control precision and processing capacity in the acyl halide hydrolysis reaction were solved, realizing a highly efficient acyl halide hydrolysis process, increasing the acid production concentration and reducing energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHE JIANG LAN TIAN HUAN BAO FU CAI LIAO YOU XIAN GONG SI
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional absorption tower devices lack the precision and processing capacity for temperature control in acyl brine hydrolysis reactions, leading to a tendency for flooding and high infrastructure investment and operating energy consumption.
The first and second falling film reactors are connected in series, combined with a reaction buffer tank and a condenser. The hydrolysis reaction of gas-phase acyl halides is carried out through the falling film reactor. The temperature and pressure are precisely controlled, and the entrained acid liquid is recovered by the condenser, thereby improving the gas-liquid separation efficiency.
It achieves efficient temperature and pressure control, improves hydrolysis conversion rate and acid concentration, reduces equipment space and energy consumption, and enhances processing capacity.
Smart Images
Figure CN224507124U_ABST
Abstract
Claims
1. A reaction system for the gas phase hydrolysis of an acyl halide, characterized in that, include: The reactor consists of a first falling film reactor (100), a second falling film reactor (200), a first reaction buffer tank (300), a second reaction buffer tank (400), a condenser (500), and an acid storage tank (600). The first falling film reactor (100) is connected to the first reaction buffer tank (300). The first falling film reactor (100) is used to hydrolyze the gaseous acyl halide, and the resulting acid liquid and hydrogen halide gas enter the first reaction buffer tank (300) and the second falling film reactor (200), respectively. The first reaction buffer tank (300) is connected to the second falling film reactor (200), which is used for hydrolysis concentration. The second falling film reactor (200) is connected to the second reaction buffer tank (400), and the second falling film reactor (200) is connected to the condenser (500), which is used to condense the acid entrained in the gas; The second reaction buffer tank (400) and the condenser (500) are both connected to the acid storage tank (600).
2. The reaction system for gas-phase acyl halide hydrolysis according to claim 1, characterized in that, The first falling film reactor (100) includes a first upper head (110), a first tube (120), and a first lower head (130); The first upper end cap (110) and the first lower end cap (130) are respectively disposed at the upper and lower ends of the first tube (120); External process water enters the first upper head (110) through the first liquid inlet pipe (2), and external gaseous acyl halide enters the first upper head (110) through the first gas inlet pipe (1). The first upper head (110) is configured to have a certain height of liquid level inside, so that the gaseous acyl halide will undergo hydrolysis reaction in the liquid level formed in the first upper head (110). The end of the first tube (120) extending into the first upper head (110) has a first liquid inlet (121). The first liquid inlet (121) is used to allow the liquid in the first upper head (110) to enter the first tube (120) to form a downward flowing liquid film, so that the gaseous acyl halide undergoes a hydrolysis reaction on the surface of the liquid film in the first tube (120). The first lower end cap (130) is used to receive the acid solution and hydrogen halide gas formed after the hydrolysis reaction.
3. The reaction system for gas-phase acyl halide hydrolysis according to claim 2, characterized in that, The first lower end cap (130) is connected to the first reaction buffer tank (300) through the first drain pipe (3) so that the acid in the first lower end cap (130) enters the first reaction buffer tank (300); The first lower end cap (130) is connected to the second falling film reactor (200) through the first gas outlet pipe (4) so that the unreacted gaseous acyl halide and the hydrogen halide gas generated by the reaction in the first lower end cap (130) enter the second falling film reactor (200).
4. The reaction system for gas-phase acyl halide hydrolysis according to claim 3, characterized in that, The top of the first reaction buffer tank (300) is connected to the second falling film reactor (200) through the second gas outlet pipe (5) so that the unreacted gaseous acyl halide and the hydrogen halide gas generated by the reaction in the first reaction buffer tank (300) enter the second falling film reactor (200); The bottom of the first reaction buffer tank (300) is connected to the first return pipe (7) and the second inlet pipe (8) through the first outlet pipe (6). The first return pipe (7) is used to connect to the first upper end cap (110), and the second inlet pipe (8) is used to connect to the second falling film reactor (200).
5. The reaction system for gas-phase acyl halide hydrolysis according to claim 4, characterized in that, The second falling film reactor (200) includes a second upper head (210), a second tube column (220), and a second lower head (230); The second upper end cap (210) and the second lower end cap (230) are respectively disposed at the upper and lower ends of the second tube (220); The top of the second upper end cap (210) is connected to a second air inlet pipe (16), which is connected to the first air outlet pipe (4) and the second air outlet pipe (5) respectively. The second upper end cap (210) is connected to the second liquid inlet pipe (8). The second upper end cap (210) is configured to have a liquid level surface of a certain height inside, so that the gaseous acyl halide forms a hydrolysis reaction in the liquid level surface inside the second upper end cap (210). The end of the second tube (220) extending into the second upper head (210) has a second liquid inlet. The second liquid inlet is used to allow the liquid in the second upper head (210) to enter the second tube (220) to form a downward flowing liquid film, so that the gaseous acyl halide undergoes a hydrolysis reaction on the surface of the liquid film in the second tube (220). The second lower end cap (230) is used to receive the acid solution and hydrogen halide gas formed after the hydrolysis reaction.
6. The reaction system for gas-phase acyl halide hydrolysis according to claim 5, characterized in that, The second lower end cap (230) is connected to the second reaction buffer tank (400) through the second drain pipe (9) so that the acid in the second lower end cap (230) enters the second reaction buffer tank (400); The second lower end cap (230) is connected to the condenser (500) through the third outlet pipe (10) so that the hydrogen halide gas in the second lower end cap (230) enters the condenser (500).
7. The reaction system for gas-phase acyl halide hydrolysis according to claim 6, characterized in that, The top of the second reaction buffer tank (400) is connected to the condenser (500) through a fourth gas outlet pipe (11) so that the hydrogen halide gas in the second reaction buffer tank (400) enters the condenser (500); The bottom of the second reaction buffer tank (400) is connected to the acid storage tank (600) through the second liquid outlet pipe (12), and the bottom of the second reaction buffer tank (400) is connected to the second upper end cap (210) through the second liquid return pipe (13).
8. The reaction system for gas-phase acyl halide hydrolysis according to claim 1, characterized in that, The top of the condenser (500) is connected to a gas phase pipe (15), through which hydrogen halide gas in the condenser (500) is discharged.
9. The reaction system for the hydrolysis of gas-phase acyl halides according to claim 5, characterized in that, The first tube (120) and the second tube (220) are provided with multiple inlets, and each first tube (120) is provided with multiple first inlets (121), and each second tube (220) is provided with multiple second inlets; The first liquid inlet (121) is formed by a recess at the top of the first tube (120), or the first liquid inlet (121) is provided on the side wall of the first tube (120). The top of the second tube (220) is recessed to form the second liquid inlet, or the side wall of the second tube (220) is provided with the second liquid inlet.
10. The reaction system for the hydrolysis of gas-phase acyl halides according to claim 6, characterized in that, The first drain pipe (3) extends into the first reaction buffer tank (300), and the height of the pipe opening at the end of the first drain pipe (3) is located at 1 / 3 to 1 / 2 of the overall height of the first reaction buffer tank (300); The second drain pipe (9) extends into the second reaction buffer tank (400), and the height of the pipe opening at the end of the second drain pipe (9) is located at 1 / 3 to 1 / 2 of the overall height of the second reaction buffer tank (400).