CN-224221360-U - Production system for trichloro hydrolysis reaction process

CN224221360UCN 224221360 UCN224221360 UCN 224221360UCN-224221360-U

Abstract

The utility model relates to the technical field of triclosan production, in particular to a production system for a triclosan hydrolysis reaction process, which comprises a heat exchanger and a tubular hydrolysis reaction device, wherein a feed inlet of the heat exchanger is communicated with a sulfuric acid conveying pipeline, a discharge outlet of the heat exchanger and a diazonium salt diluent conveying pipeline are respectively communicated with a sulfuric acid feed pipe and a diazonium salt diluent feed pipe of the tubular hydrolysis reaction device, a discharge pipe of the tubular hydrolysis reaction device is respectively communicated with a heating medium inlet of the heat exchanger, and a heating medium outlet of the heat exchanger is communicated with an extraction kettle. The production system is reasonable in design, and the reaction raw material (sulfuric acid) and the hydrolysis reaction product feed liquid can exchange heat fully through the heat exchanger, so that the heat energy consumption is reduced. The tubular hydrolysis reaction device is used for continuously producing, so that the reaction efficiency and the production efficiency are greatly improved.

Inventors

XIA SHULING
XU XINYING
ZHU XIRUI

Assignees

山东奥友生物科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250520

Claims (9)

1. The production system for the trichlorohydrolysis reaction process is characterized by comprising a heat exchanger and a tubular hydrolysis reaction device, wherein a feed inlet of the heat exchanger is communicated with a sulfuric acid conveying pipeline, a discharge outlet of the heat exchanger and a diazonium salt diluent conveying pipeline are respectively communicated with a sulfuric acid feed pipe and a diazonium salt diluent feed pipe of the tubular hydrolysis reaction device, a discharge pipe of the tubular hydrolysis reaction device is respectively communicated with a heating medium inlet of the heat exchanger, and a heating medium outlet of the heat exchanger is communicated with an extraction kettle.
2. The production system for a process of hydrolysis of trichloro according to claim 1, wherein the sulfuric acid delivery pipe is in communication with the feed inlet of the heat exchanger via a metering pump.
3. The production system for a trichlorohydrolysis reaction process according to claim 1, wherein the diazonium salt diluent delivery conduit communicates with the tubular hydrolysis reaction apparatus via a metering pump.
4. The production system for the trichlorohydrolysis reaction process according to claim 1, wherein the tubular hydrolysis reaction device comprises a body, a plurality of layers of reaction coils which are mutually communicated are arranged in the body, a sulfuric acid feeding pipe and a sulfuric acid discharging pipe which are communicated with the reaction coils are respectively arranged at two ends of the body, a diazonium salt diluent feeding pipe which is communicated with the reaction coils is arranged at the position 1/3 of the total layer number of the reaction coils at the top of the body, a heating medium inlet is arranged at one side of the top of the body, a heating medium outlet is arranged at one side of the bottom of the body, and an electric heating rod is arranged between two adjacent layers of the reaction coils.
5. The system of claim 4, wherein the top of the body is provided with a diazonium salt diluent inlet tube in communication with the reaction coil at 1/3 of the total number of layers from the reaction coil.
6. The system of claim 4, wherein the sulfuric acid feed pipe is provided with a purge port and the discharge pipe is provided with a cleaning fluid outlet.
7. The system of claim 4, wherein two level gauges are provided in the body, and an interface is further provided at the top of the body for communicating with a heat medium buffer tank.
8. The system of claim 4, wherein a first temperature sensor is disposed in the body, a second temperature sensor is disposed in the reaction coil, and the first temperature sensor, the second temperature sensor and the electric heating rod are electrically connected to the controller, respectively.
9. The system of claim 4, wherein the inlet and outlet ends of the reaction coil are respectively provided with a pressure sensor, and the pressure sensors are electrically connected with the controller.

Description

Production system for trichloro hydrolysis reaction process Technical Field The utility model relates to the technical field of triclosan production, in particular to a production system for a triclosan hydrolysis reaction procedure. Background Triclosan is a safe and efficient broad-spectrum antibacterial agent and is widely applied to daily chemicals, medical treatment and textile industries due to its excellent antibacterial performance. At present, the main industrial process routes at home and abroad basically take dichlorophenol as a raw material, and sequentially carry out etherification reaction, nitroreduction, diazotization and hydrolysis reaction with dichloronitrobenzene, and then the target product is obtained through the procedures of extraction, rectification and the like. The key processes of determining production cost and product quality are diazotization reaction and hydrolysis reaction, wherein the traditional hydrolysis process uses a reaction kettle as reaction equipment, the production period is longer, the equipment utilization rate is low, the energy consumption in the production process is overlarge, the hydrolysis yield is low due to intermittent reaction, in addition, sulfuric acid is used as a substrate in the hydrolysis reaction, the temperature is raised to about 180 ℃, nitrogen salt diluent is added dropwise into the sulfuric acid, the reaction is finished, the materials at about 180 ℃ are required to be cooled to below 90 ℃ in addition, then the next process production operation is carried out, the raw material temperature rise and reactant temperature reduction are separately processed, and the heat energy utilization rate is lower. Therefore, in order to solve the above-mentioned problems, it is necessary to develop a production system for a process of hydrolysis of trichloro. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a production system for a trichlorohydrolysis reaction process, which greatly improves the hydrolysis yield and reduces the reaction risk. In order to solve the technical problems, the technical scheme of the utility model is as follows: The utility model provides a production system that trichlorohydrolysis reaction process was used, includes heat exchanger and tubular hydrolysis reaction device, the feed inlet intercommunication sulfuric acid pipeline of heat exchanger, the discharge gate of heat exchanger and diazonium salt diluent pipeline communicate tubular hydrolysis reaction device's sulfuric acid inlet pipe and diazonium salt diluent inlet pipe respectively, tubular hydrolysis reaction device's discharging pipe communicates the heat medium import of heat exchanger respectively, the heat medium export intercommunication extraction cauldron of heat exchanger. As an improved technical scheme, the sulfuric acid conveying pipeline is communicated with the feed inlet of the heat exchanger through a metering pump. As an improved technical scheme, the diazonium salt diluent delivery conduit communicates with the tubular hydrolysis reaction apparatus via a metering pump. As an improved technical scheme, the tubular hydrolysis reaction device comprises a body, wherein a plurality of layers of reaction coils which are mutually communicated are arranged in the body, a sulfuric acid feeding pipe and a sulfuric acid discharging pipe which are communicated with the reaction coils are respectively arranged at two ends of the body, a diazonium salt diluent feeding pipe which is communicated with the reaction coils is arranged at the position which is 1/3 of the total layer number of the reaction coils, a heating medium inlet is formed in one side of the top of the body, a heating medium outlet is formed in one side of the bottom of the body, and an electric heating rod is arranged between every two adjacent layers of the reaction coils. As an improved technical scheme, the top of the body is provided with a diazonium salt diluent inlet pipe communicated with the reaction coil at a position which is 1/3 of the total layer number of the reaction coil. As an improved technical scheme, a sweeping and cleaning port is arranged on the sulfuric acid feeding pipe, and a cleaning liquid outlet is arranged on the discharging pipe. As an improved technical scheme, the inside of body is equipped with two level gauges, the top of body still is equipped with the interface that is linked together with the heat medium buffer memory jar. As an improved technical scheme, the inside of body is equipped with first temperature sensor, the inside of reaction coil is equipped with second temperature sensor, first temperature sensor, second temperature sensor and electric heating rod are the electric connection director respectively. As an improved technical scheme, the inlet and outlet ends of the reaction coil are respectively provided with a pressure sensor, and the pressure sensors are electrically connected with the controller. After