Production device for controlling content of benzohydroxamic acid

Abstract

The utility model discloses a production device for controlling the content of benzohydroxamic acid, which comprises a kettle body with a heat exchange jacket, a circulating pump, a reflux discharge pipe, a reflux feed pipe, a motor and a mixing screen plate, the feed pipe is positioned at the upper part of the kettle body, the discharge pipe is positioned at the bottom of the kettle body, the reflux feed pipe horizontally penetrates through the side surface of the kettle body and is positioned at the upper part of the kettle body, and the motor is positioned at the bottom of the kettle body. The backflow discharging pipe horizontally penetrates through the side face of the kettle body and is located on the lower portion of the kettle body, the feeding end of the circulating pump is communicated with the backflow feeding pipe, the discharging end of the circulating pump is communicated with the backflow discharging pipe, and a plurality of discharging ports are formed in the portion, located in the kettle body, of the backflow discharging pipe. An output shaft of the motor extends into the kettle body and is fixedly connected with the material mixing screen plate, the material mixing screen plate is positioned above the backflow discharging pipe, and the material mixing screen plate is formed by mutually crossing and connecting a plurality of corrugated grid bars in a staggered manner. According to the utility model, raw materials for producing benzohydroxamic acid are subjected to circular mixing reaction, so that the reaction progress is promoted, and the yield and the purity are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of benzohydroxamic acid production, in particular to a production device for controlling the content of benzohydroxamic acid. Background Art

[0002] Benzohydroxamic acid (solid acid for short) is an effective collector for refractory minerals such as smithsonite, wolframite, scheelite and cassiterite. In the production process of benzohydroxamic acid, how to control the content of benzohydroxamic acid to meet the different needs of customers is a difficult point in production control. Patent 201822170645.6 discloses a production device for controlling the content of benzohydroxamic acid, which controls the content of benzohydroxamic acid output by controlling the raw material ratio and temperature, but does not have the purpose of accurately controlling the content. The reason is that the raw material for the production of benzohydroxamic acid is methyl benzoate, which is easily soluble in organic solvents but insoluble in water, and the raw materials hydroxylamine sulfate and alkali are easily soluble in water. The oil-water two-phase reaction is difficult to carry out. At the same time, the generated sodium benzohydroxamic acid will produce a lot of foam, which makes the reaction further difficult to react. Only by using ordinary stirring paddles to mix the raw materials will the product content and purity be reduced. Utility Model Content

[0003] The utility model aims to overcome the disadvantages of the prior art and provide a production device for controlling the content of benzohydroxamic acid which can circulate reaction and reduce the generation of bubbles to promote the reaction.

[0004] The purpose of the utility model is achieved through the following technical solutions: a production device for controlling the content of benzohydroxamic acid, comprising a kettle body provided with a heat exchange jacket, a circulation pump, a reflux discharge pipe, a reflux feed pipe, a motor, and a mixing mesh plate, wherein the feed pipe is located at the upper part of the kettle body, the discharge pipe is located at the bottom of the kettle body, the reflux feed pipe horizontally passes through the side of the kettle body and is located at the upper part of the kettle body, the reflux discharge pipe horizontally passes through the side of the kettle body and is located at the lower part of the kettle body, the feed end of the circulation pump is connected to the reflux feed pipe, the discharge end of the circulation pump is connected to the reflux discharge pipe, a plurality of discharge ports are arranged on the part of the reflux discharge pipe located in the kettle body, the motor is installed on the top of the kettle body, the output shaft of the motor extends into the kettle body and is fixedly connected to the mixing mesh plate, the mixing mesh plate is located above the reflux discharge pipe, and the mixing mesh plate is formed by a plurality of corrugated bars cross-connected with each other.

[0005] Furthermore, a flow partition is provided in the kettle body, the flow partition is internally connected to the upper part of the kettle body, a plurality of openings are provided on the flow partition, and the reflux feed pipe is located above the flow partition.

[0006] Furthermore, a defoaming rod is arranged on the output shaft of the motor, and a plurality of staggered burrs are arranged on the defoaming rod, and the defoaming rod is located above the reflux feed pipe.

[0007] Furthermore, it also includes a bubble exhaust pipe and a vacuum exhaust pipe, the bubble exhaust pipe is vertically arranged, the height of the bubble exhaust pipe is greater than the liquid level in the kettle body, the discharge end of the reflux feed pipe is connected to the middle part of the bubble exhaust pipe, the bottom of the bubble exhaust pipe is connected to the feed end of the circulation pump, one end of the vacuum exhaust pipe is connected to the vacuum pump, and the other end of the vacuum exhaust pipe is respectively connected to the top of the kettle body and the top of the bubble exhaust pipe through branch pipelines.

[0008] Furthermore, a defoaming net is internally provided at the upper portion of the bubble discharge pipe.

[0009] The utility model has the following advantages: through the cooperation of the circulation pump and the mixing mesh plate, the two phases of the raw materials are circulated and mixed, and compared with the traditional blade-type stirring paddle, the mixing state is better, which promotes the progress of a single reaction; the setting of the flow partition reduces the amount of foam entering the bubble discharge pipe, the setting of the bubble discharge pipe allows the reaction liquid and the bubbles to flow in reverse and separate, the setting of the defoaming rod pierces the foam in the kettle body, and the vacuum state created by the vacuum pump further improves the defoaming ability; by setting a variety of defoaming structures, sodium benzohydroxamate releases the raw material methyl benzoate from the bubble wrapping, which reduces the difficulty of the reaction, promotes the progress of the reaction, and improves the final yield and purity. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0011] In the figure, 1. kettle body; 2. heat exchange jacket; 3. feed pipe; 4. discharge pipe; 5. circulation pump; 6. reflux feed pipe; 7. reflux discharge pipe; 8. discharge port; 9. motor; 10. mixing mesh plate; 11. flow partition; 12. opening; 13. defoaming rod; 14. convex thorn; 15. bubble discharge pipe; 16. vacuum exhaust pipe; 17. defoaming net. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0013] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0014] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] like Figure 1As shown, a production device for controlling the content of benzohydroxamic acid includes a kettle body 1 provided with a heat exchange jacket 2, a circulation pump 5, a reflux discharge pipe 7, a reflux feed pipe 6, a motor 9, a mixing mesh plate 10, a bubble discharge pipe 15, a vacuum exhaust pipe 16, a vacuum pump, and a flow partition 11. The feed pipe 3 is located at the upper part of the kettle body 1, the discharge pipe 4 is located at the bottom center of the kettle body 1, the motor 9 is installed on the top of the kettle body 1, and the bottom end of the output shaft of the motor 9 extends into the kettle body 1 and is fixedly connected to the mixing mesh plate 10, and the mixing mesh plate 10 is a plurality of corrugated bars. The flow partition 11 is connected to the upper part of the kettle body 1, and a plurality of openings 12 are arranged on the flow partition 11, and the openings 12 allow the solution to pass through. The reaction liquid in the kettle body 1 is divided into an upper and lower layer when it is static. The flow partition 11 is located in the upper layer of the reaction liquid and divides the upper part into a static section and the lower part into a mixing reaction section. The reflux feed pipe 6 passes horizontally through the side of the kettle body 1 and is located in the static section. The reflux discharge pipe 7 passes horizontally through the side of the kettle body 1 and is located at the lower part of the mixing reaction section. The mixing mesh plate 10 is located above the reflux discharge pipe 7 and is also located at the mixing reaction section. In the section, the mixing mesh plate 10 is circular, the part of the reflux discharge pipe 7 located in the kettle body 1 is an annular pipe, a plurality of discharge ports 8 are provided on the reflux discharge pipe 7, and the discharge ports 8 are located at the lower part of the reflux discharge pipe 7 to form a circulating liquid sprayed downward, the feed end of the circulation pump 5 is connected to the reflux feed pipe 6, the discharge end of the circulation pump 5 is connected to the reflux discharge pipe 7, the bubble discharge pipe 15 is vertically arranged, the height of the bubble discharge pipe 15 is greater than the liquid level height in the kettle body 1 to form a cavity above the bubble discharge pipe 15, and the discharge end of the reflux feed pipe 6 is connected to the bubble discharge pipe The middle part of 15, the bottom of the bubble discharge pipe 15 is connected to the feed end of the circulation pump 5, the discharge end of the circulation pump is connected to the feed end of the reflux discharge pipe 7, one end of the vacuum exhaust pipe 16 is connected to the vacuum pump, and the other end of the vacuum exhaust pipe 16 is connected to the top of the kettle body 1 and the top of the bubble discharge pipe 15 through a branch pipeline. A defoaming rod 13 is installed on the output shaft of the motor 9, and a plurality of staggered convex thorns 14 are installed on the defoaming rod 13. The defoaming rod 13 is located above the liquid level in the kettle body 1, and a defoaming net 17 is installed in the upper cavity of the bubble discharge pipe 15.

[0016] The utility model has the following working principles: the motor, the circulating pump and the vacuum pump are started; the circulating pump sprays the upper layer reaction liquid into the lower layer reaction liquid through the pump; during the floating process of the upper layer reaction liquid, the upper layer reaction liquid is dispersed by the mixing mesh plate to increase the reaction contact surface; at this time, the flow partition plate separates the reaction liquid into an upper static section and a lower mixed reaction section; due to the generation of sodium benzohydroxamate, a large number of bubbles exist in the reaction liquid and gradually float up; the bubbles in the static section are punctured by the rotating defoaming rod; part of the bubbles are extracted into the bubble discharge pipe by the circulating pump; due to the light weight of the bubbles, the bubbles float up in the bubble discharge pipe; at the same time, the vacuum state created by the vacuum pump accelerates the expansion and floating of the bubbles; the bubble discharge pipe realizes the reverse flow separation function of the reaction liquid and the bubbles; the reaction liquid at the bottom of the bubble discharge pipe does not contain bubbles; the reaction liquid at the bottom enters the kettle body and will fully react; due to the absence of the bubbles of the reaction raw material methyl benzoate wrapped by the intermediate product sodium benzohydroxamate, the reaction is promoted and the yield and purity are improved.

[0017] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A production device for controlling the content of benzohydroxamic acid, characterized in that: The invention comprises a kettle body (1) provided with a heat exchange jacket (2), a circulation pump (5), a reflux discharge pipe (7), a reflux feed pipe (6), a motor (9), and a mixing mesh plate (10), wherein the feed pipe (3) is located at the upper part of the kettle body (1), the discharge pipe (4) is located at the bottom of the kettle body (1), the reflux feed pipe (6) horizontally passes through the side of the kettle body (1) and is located at the upper part of the kettle body (1), the reflux discharge pipe (7) horizontally passes through the side of the kettle body (1) and is located at the lower part of the kettle body (1), and the feed end of the circulation pump (5) is connected to the mixing mesh plate (10). The discharge end of the circulation pump (5) is connected to the reflux discharge pipe (7) through the reflux feed pipe (6). The reflux discharge pipe (7) is provided with a plurality of discharge ports (8) on the portion located inside the kettle body (1). The motor (9) is installed on the top of the kettle body (1). The output shaft of the motor (9) extends into the kettle body (1) and is fixedly connected to the mixing mesh plate (10). The mixing mesh plate (10) is located above the reflux discharge pipe (7). The mixing mesh plate (10) is formed by a plurality of corrugated bars that are cross-connected.

2. A production device for controlling the content of benzohydroxamic acid according to claim 1, characterized in that: A flow divider (11) is arranged in the kettle body (1), the flow divider (11) is connected to the upper part of the kettle body (1), a plurality of openings (12) are arranged on the flow divider (11), and the reflux feed pipe (6) is located above the flow divider (11).

3. The production device for controlling the content of benzohydroxamic acid according to claim 1, characterized in that: A defoaming rod (13) is arranged on the output shaft of the motor (9), and a plurality of staggered ridges (14) are arranged on the defoaming rod (13). The defoaming rod (13) is located above the reflux feed pipe (6).

4. The production device for controlling the content of benzohydroxamic acid according to claim 1, characterized in that: It also comprises a bubble exhaust pipe (15) and a vacuum exhaust pipe (16), wherein the bubble exhaust pipe (15) is arranged vertically, and the height of the bubble exhaust pipe (15) is greater than the height of the liquid level in the kettle (1), the discharge end of the reflux feed pipe (6) is connected to the middle of the bubble exhaust pipe (15), the bottom of the bubble exhaust pipe (15) is connected to the feed end of the circulation pump (5), one end of the vacuum exhaust pipe (16) is connected to the vacuum pump, and the other end of the vacuum exhaust pipe (16) is respectively connected to the top of the kettle (1) and the top of the bubble exhaust pipe (15) through a branch pipeline.

5. A production device for controlling the content of benzohydroxamic acid according to claim 4, characterized in that: A defoaming net (17) is provided in the upper part of the bubble discharge pipe (15).

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