CN-224207991-U - Continuous production device of benzimidazolone

Abstract

The utility model relates to a continuous production device of benzimidazolone, which comprises a urea storage tank, an aniline storage tank, a nitrogen buffer tank, a dynamic tubular reactor and a benzimidazolone storage tank, wherein the urea storage tank is connected with a feed inlet at the top of the dynamic tubular reactor, the aniline storage tank is connected with a liquid inlet at the bottom of the dynamic tubular reactor through a liquid inlet pipe, the nitrogen buffer tank is connected with an air inlet at the upper part of the dynamic tubular reactor through an air inlet pipe, a discharge pipe of the dynamic tubular reactor is connected with the benzimidazolone storage tank, and the dynamic tubular reactor is connected with a cold and hot integrated machine and is used for heating of the dynamic tubular reactor. The utility model realizes continuous feeding and discharging, continuous synthesis of benzimidazolone and continuous and controllable production process.

Inventors

• ZHANG SHIXIN
• LIU CHANGCHUN
• LV NING
• TAN YANGYANG
• LIU CHUANG
• ZHAO ZHE

Assignees

• 鞍山惠友智能装备科技有限责任公司

Dates

Publication Date

20260508

Application Date

20250520

Claims (8)

1. 1. The utility model provides a continuous production device of benzimidazolone, its characterized in that includes urea storage tank, aniline storage tank, nitrogen buffer tank, dynamic tubular reactor, benzimidazolone storage tank, the feed inlet at urea storage tank and dynamic tubular reactor top is connected, the aniline storage tank is connected with the inlet of dynamic tubular reactor bottom through the feed liquor pipe, nitrogen buffer tank passes through the intake pipe and is connected with the air inlet on dynamic tubular reactor upper portion, the discharging pipe of dynamic tubular reactor is connected with the benzimidazolone storage tank, dynamic tubular reactor is connected with cold and hot all-in-one for the heat supply of dynamic tubular reactor.
2. 2. The continuous production device of benzimidazolone according to claim 1, wherein a weighing device is arranged on a bottom discharge hole of the urea storage tank.
3. 3. The continuous production device of benzimidazolone according to claim 1, wherein the liquid inlet pipe is provided with a delivery pump, a mass flowmeter and a flow self-control valve.
4. 4. The continuous production device of benzimidazolone according to claim 1, wherein the first electromagnetic valve is arranged on the air inlet pipe.
5. 5. The continuous production device of benzimidazolone according to claim 1, wherein the dynamic tubular reactor is provided with a thermometer and a pressure gauge.
6. 6. The continuous production device of benzimidazolone according to claim 1, wherein the lower part of the dynamic tubular reactor is provided with a sampling port.
7. 7. The continuous production device of benzimidazolone according to claim 1, wherein the ratio of the height of the reaction cavity tube to the tube diameter of the dynamic tube reactor is (10-20): 1.
8. 8. The continuous production device of benzimidazolone according to claim 1, wherein the discharging pipe of the dynamic tubular reactor is provided with an electromagnetic second.

Description

Continuous production device of benzimidazolone Technical Field The utility model belongs to the technical field of chemical equipment, and particularly relates to a continuous production device of benzimidazolone. Background Benzimidazolone substances are important intermediates for synthesizing various organic pigments, and benzimidazolone is an important intermediate for medicines, pigments and dyes. Benzimidazolone pigments are widely used azo-type organic pigments and have good properties. The traditional methods for synthesizing benzimidazolone are urea method, phosgene method and dimethyl carbonate method. At present, manufacturers for producing benzimidazolone generally use o-dichlorobenzene as a solvent system, aniline substances as raw materials and a relatively traditional urea method, and adopt a kettle type synthesis mode for production. CN1675185 describes a process for the synthesis of 5-amino-6-methylbenzimidazolone in which 3, 4-diaminotoluene is refluxed with urea in a solvent and then condensed to give 5-methylbenzimidazolone. CN 101863840A, CN 101863840B, both patents describe the synthesis of 5-amino-6-methylbenzimidazolone, wherein 3, 4-diaminotoluene is condensed with urea using o-dichlorobenzene as solvent to prepare 5-methylbenzimidazolone. In the traditional process, a solvent system is needed in the synthesis process of benzimidazolone substances, the feeding process is complex, the reaction is needed in a reaction kettle, and continuous production is difficult to realize. The solvent is used in a large amount, the crude product needs to be desolventized, the occupational health of operators is affected in the process, and a large amount of wastewater is generated to be treated later. Disclosure of Invention The utility model aims to solve the technical problems of secondary desolventizing, low production efficiency, complex process and high production cost in the existing benzimidazolone production process. In order to achieve the above purpose, the utility model adopts the following technical scheme: The utility model provides a continuous production device of benzimidazolone, includes urea storage tank, aniline storage tank, nitrogen buffer tank, dynamic tubular reactor, benzimidazolone storage tank, the urea storage tank is connected with the feed inlet at dynamic tubular reactor top, the aniline storage tank is connected with the inlet of dynamic tubular reactor bottom through the feed liquor pipe, the nitrogen buffer tank passes through the intake pipe and is connected with the air inlet on dynamic tubular reactor upper portion, the discharging pipe of dynamic tubular reactor is connected with the benzimidazolone storage tank, dynamic tubular reactor is connected with the hot and cold all-in-one for the heat supply of dynamic tubular reactor. And a weighing device is arranged on a bottom discharge hole of the urea storage tank. The liquid inlet pipe is provided with a delivery pump, a mass flowmeter and a flow self-control valve. The air inlet pipe is provided with a first electromagnetic valve. The dynamic tubular reactor is provided with a thermometer and a pressure gauge. The lower part of the dynamic tubular reactor is provided with a sampling port. The ratio of the height of the reaction cavity tube to the tube diameter of the dynamic tube reactor is (10-20): 1. And an electromagnetic second is arranged on the discharge pipe of the dynamic tubular reactor. Compared with the prior art, the utility model has the beneficial effects that: 1. The utility model realizes continuous feeding and discharging, continuous synthesis of benzimidazolone and continuous and controllable production process. 2. And a weighing device is arranged on the discharge port of the urea storage tank, so that the feeding accuracy is improved. 3. The dynamic tubular reactor adopts a cold and hot integrated machine to control the temperature, so that the reaction temperature can be quickly reached, and the regulation and control are convenient. 4. The aniline is directly mixed with urea in a molten state for reaction, and solvent participation is not needed in the preparation process, so that occupational health hazard and environmental pollution caused by using the solvent can be avoided. 5. The dynamic tubular reactor is provided with a sampling port, and the reaction product can be sampled and detected to obtain the material mixing and reaction conditions, so that the parameters can be conveniently adjusted. The utility model realizes that aniline and urea are used as raw materials, a solvent-free system is adopted, and the urea is subjected to condensation reaction in a solid feeding mode under the protection of nitrogen. Simple process and convenient operation, and is suitable for industrial production. Drawings Fig. 1 is a schematic structural view of the present utility model. In the figure, a urea storage tank 1, an aniline storage tank 2, a nitrogen buffer tank 3, a dynamic tubular reactor 4