Hydrolysis device for butyramide production

Abstract

The utility model belongs to the technical field of chemical production equipment, and discloses a hydrolysis device for butyramide production, which comprises a reaction kettle with a jacket, the top of the reaction kettle is upwards communicated with a water head tank and an ammonia water head tank, the bottom of the reaction kettle is provided with a discharge valve, and the discharge valve is respectively communicated with a circulating pump and a discharge pump through pipelines. The circulating pump conveys materials back to the reaction kettle through the heat exchanger; a remote thermometer and a remote pressure gauge are arranged on the side wall of the reaction kettle, a water inlet valve and a water outlet valve are arranged on the jacket, a stirring device is arranged in the reaction kettle, and a stirring motor arranged at the top of the reaction kettle is arranged at the top of the stirring device; and a discharge valve and a flow meter are respectively arranged on the pipelines through which the water head tank and the ammonia water head tank are communicated with the reaction kettle. The device disclosed by the utility model is high in automation degree and high in safety, and can effectively improve the yield, reduce the labor, lower the cost and reduce the environmental pollution.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical production equipment, and specifically relates to a hydrolysis device for butanamide production. Background Art

[0002] 2-Amino-2,3-dimethylbutyramide, also known as butyramide, is a white crystal with an alkaline nature and a mp of 74.5-76°C. It is soluble in water, ethanol, and acetone, but insoluble in benzene, toluene, etc. It is an intermediate of the world's fastest-growing herbicides, such as imazapic acid, imazapyr, imazapyr, imazaquinac, and methoxyfen-1-pyrazoline. It has a wide range of applications in the market and good prospects. At present, the production of butyramide mainly involves the interaction of methyl isopropyl ketone, sodium cyanide, and ammonium chloride to generate 2-amino-2,3-dimethylbutyronitrile, which is then hydrolyzed to butyramide in the presence of concentrated sulfuric acid. Because the amide generated during the hydrolysis process is very easy to be further hydrolyzed into carboxylic acid, the concentration of sulfuric acid and ammonia water must be well controlled during the production process. However, the existing production process still uses manual intermittent feeding, reaction, and discharge, and the ratio of the raw materials and the precision control of the reaction conditions are difficult to guarantee, which leads to problems such as poor production continuity, low production capacity, and low safety. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a hydrolysis device for butanamide production, which overcomes the defects of the prior art, adopts DCS automatic control for feeding, reaction and discharging, has a simple structure, realizes one-key start automatic operation, can produce continuously, improves production capacity, improves safety and reduces operation risks.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A hydrolysis device for butyramide production comprises a reactor provided with a jacket, wherein the top of the reactor is upwardly connected with a water high-level tank and an ammonia high-level tank, a discharge valve is provided at the bottom, the discharge valve is respectively connected to a circulation pump and the discharge pump through pipelines, and the circulation pump transports the material back to the reactor through a heat exchanger; a remote thermometer and a remote pressure gauge are provided on the side wall of the reactor, a water inlet valve and a water outlet valve are provided on the jacket, a stirring device is provided in the reactor, and the top of the stirring device is a stirring motor arranged on the top of the reactor; a discharge valve and a flow meter are respectively provided on the pipelines connecting the water high-level tank and the ammonia high-level tank to the reactor; the discharge valve, the circulation pump, the discharge pump, the remote thermometer, the remote pressure gauge, the water inlet valve, the water outlet valve, the stirring motor, the discharge valve and the flow meter are all electrically connected to a DCS automatic control system.

[0006] Preferably, the discharge valve, water inlet valve, water outlet valve and discharge valve are all automatic valves. The valve model is JG60-Q2-DA-MF3-50-A-16, and the manufacturer is Shanghai Huhang Valve Co., Ltd.

[0007] Preferably, the circulation pump and discharge pump are both PTFE magnetic centrifugal pumps, model IMC50-32-160F, manufactured by Shanghai Benuo Pump & Valve Co., Ltd.

[0008] Preferably, a tuning fork level switch is provided at the inlet of the discharge pump (to ensure that the pump can be stopped in time after the discharge is completed), and the discharge pump is electrically connected to the DCS automatic control system through the tuning fork level switch. The tuning fork level switch of the discharge pump sends an empty pipe signal to the DCS, and the DCS automatic control system sends a pump stop signal. The product model is HS-YCUK, and the manufacturer is Xi'an Huashun Measurement Equipment Co., Ltd.

[0009] Preferably, the remote thermometer is used for temperature detection, the remote pressure gauge is used for pressure detection, and the remote flow meter is used for circulating pump flow detection to prevent the circulating pump from running without flow. The thermometer model is PT100-80-16, and the manufacturer is Tianchang Instrument Factory, Anhui Province. The remote pressure gauge model is LH3851HT, and the manufacturer is Jiangsu Hongguang Instrument Factory Co., Ltd. The remote flow meter model is LZ50-16, and the manufacturer is Jiangsu Hongguang Instrument Factory Co., Ltd.

[0010] Preferably, the water high level tank and the ammonia high level tank are both provided with a remote double flange level gauge and a magnetic flap level gauge. The remote double flange level gauge is electrically connected to the DCS automatic control system.

[0011] Preferably, the heat exchanger is a silicon carbide heat exchanger. The heat exchanger manufacturer is Shandong Haomai Machinery Technology Co., Ltd., and the heat exchanger model is CHE400.3000.14-20.6S.

[0012] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0013] The utility model controls the amount of added material by automatically adding and controlling the material, thereby realizing accurate control of material preparation and preventing the amide from being further hydrolyzed into carboxylic acid. In addition, accurate temperature control of the reaction material is realized by water circulation in the jacket and material circulation in the heat exchanger outside the reactor, thereby ensuring balanced and uniform reaction conditions.

[0014] In short, the utility model has high automation and safety, can effectively improve the yield, reduce labor, reduce costs, and reduce environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the process of the utility model;

[0016] In the figure, 1. Reactor; 2. Water high-level tank; 3. Ammonia high-level tank; 4. Circulation pump; 5. Discharge pump; 6. Heat exchanger. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] Embodiment 1:

[0019] like Figure 1 As shown, a hydrolysis device for butyramide production includes a reactor 1 provided with a jacket (not shown), the top of the reactor 1 is connected to a water high-level tank 2 and an ammonia high-level tank 3, and a discharge valve (not shown) is provided at the bottom. The discharge valve is connected to a circulation pump 4 and a discharge pump 5 respectively through pipelines, and the circulation pump 4 transports the material back to the reactor 1 through a heat exchanger 6; a remote thermometer (not shown) and a remote pressure gauge (not shown) are provided on the side wall of the reactor 1, and a water inlet valve (not shown) and a water outlet valve (not shown) are provided on the jacket. A valve (not marked) is provided in the reactor 1, and a stirring device (not marked) is provided in the reactor 1, and the top of the stirring device is a stirring motor (not marked) arranged on the top of the reactor 1; a discharge valve (not marked) and a flow meter (not marked) are respectively provided on the pipelines connecting the water high-level tank 2 and the ammonia high-level tank 3 to the reactor 1; the discharge valve, circulation pump 4, discharge pump 5, remote thermometer, remote pressure gauge, water inlet valve, water outlet valve, stirring motor, discharge valve and flow meter are all electrically connected to the DCS automatic control system (not marked).

[0020] In actual production, first add 1760 liters of water into the water metering tank 2, and put it into the reactor 1 after metering. Open the water inlet valve and the water outlet valve on the jacket, and use ice water to cool the water in the reactor 1. When the temperature drops below 15°C, open the discharge valve on the ammonia high-level tank 3, and add 1812 kg of ammonia water by flow meter control. While adding, open the discharge valve and the circulation pump 4, and use the heat exchanger 6 (the heat exchange medium is the same as the medium in the jacket) to circulate and cool the material. At the same time, control the dripping speed to ensure that the reaction temperature does not exceed 40°C. After the dripping is completed; after the dripping is completed, close the circulation pump 4, open the discharge pump 5 to transfer the reacted material to the extraction kettle of the subsequent process for extraction, and the hydrolysis reaction of butanamide is completed.

[0021] It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A hydrolysis device for butanamide production, characterized in that: The invention comprises a reactor provided with a jacket, wherein the top of the reactor is connected with a water high-level tank and an ammonia high-level tank upward, a discharge valve is provided at the bottom, the discharge valve is connected with a circulation pump and a discharge pump respectively through pipelines, and the circulation pump transports the material back to the reactor through a heat exchanger; a remote thermometer and a remote pressure gauge are provided on the side wall of the reactor, a water inlet valve and a water outlet valve are provided on the jacket, a stirring device is provided in the reactor, and the top of the stirring device is a stirring motor arranged on the top of the reactor; a discharge valve and a flow meter are provided on the pipelines connecting the water high-level tank and the ammonia high-level tank to the reactor respectively; the discharge valve, circulation pump, discharge pump, remote thermometer, remote pressure gauge, water inlet valve, water outlet valve, stirring motor, discharge valve and flow meter are all electrically connected to a DCS automatic control system.

2. The hydrolysis device for butanamide production according to claim 1, characterized in that: The discharge valve, water inlet valve, water outlet valve and discharge valve are all automatic valves.

3. The hydrolysis device for butanamide production according to claim 1, characterized in that: The circulation pump and the discharge pump are both tetrafluoro magnetic centrifugal pumps.

4. The hydrolysis device for butanamide production according to claim 1, characterized in that: A tuning fork level switch is provided at the inlet of the discharge pump, and the discharge pump is electrically connected to a DCS automatic control system through the tuning fork level switch.

5. The hydrolysis device for butanamide production according to claim 1, characterized in that: The water high-level tank and the ammonia water high-level tank are both provided with a remote double-flange level gauge and a magnetic flap level gauge.

6. The hydrolysis device for butanamide production according to claim 1, characterized in that: The heat exchanger is a silicon carbide heat exchanger.

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