Portable sampling device of lilial hydrogenation kettle

Abstract

The utility model relates to a portable sampling device for a lilial hydrogenation kettle, which belongs to the technical field of organic synthesis and comprises a hydrogenation kettle and a U-shaped sampling tube mounted on the hydrogenation kettle, one end of the sampling tube extends into the inner bottom of the hydrogenation kettle from the top of the hydrogenation kettle, and the other end of the sampling tube is positioned on one side of the outer wall of the hydrogenation kettle. One side, located in the hydrogenation kettle, of the sampling pipe is vertically arranged, transverse branch pipes are connected to different height positions of the sampling pipe respectively, and sampling valves are mounted at the bottom of the sampling pipe and on the transverse branch pipes; one end of the sampling pipe outside the hydrogenation kettle is connected with a plug, and a first valve and a second valve are sequentially and adjacently mounted on one side of the sampling pipe close to the plug. After the hydrogenation reaction is finished, pressure relief is not needed, the materials are sucked out of the hydrogenation kettle into the sampling pipe for sampling by utilizing pressure difference, and the materials with different liquid levels in the hydrogenation kettle can be sampled, so that the sampling accuracy is ensured, convenience and rapidness are realized, the hydrogen consumption is reduced, and the cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of organic synthesis technology, and in particular to a portable sampling device for lily of the valley aldehyde hydrogenation reactor. Background Technology

[0002] Lily aldehyde is an important synthetic fragrance. It has the scent of lily of the valley, a fresh aroma, and a long-lasting fragrance. It is widely used in the production of soaps, detergents, and daily cosmetics.

[0003] In the synthesis method of lily aldehyde by hydrogenation of tert-butyl-α-methylbenzene acrolein, after the hydrogenation reaction is completed, the hydrogenation vessel needs to be vented and replaced with a slight positive pressure. Then, the reaction liquid in the vessel is sampled and tested to determine whether the reaction is complete. If not, hydrogen gas needs to be introduced to continue the reaction.

[0004] Current sampling and testing methods have the following drawbacks:

[0005] (1) Before each batch of samples is taken, the hydrogenation vessel needs to be depressurized to a slightly positive pressure. If the reaction is not completed, hydrogen needs to be repressurized, which takes a long time.

[0006] (2) Frequent pressurization and depressurization increases hydrogen consumption and production costs. Utility Model Content

[0007] The purpose of this invention is to provide a portable sampling device for lily aldehyde hydrogenation reactor to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A portable sampling device for a lily of the valley aldehyde hydrogenation reactor includes a hydrogenation reactor and a sampling tube installed on the reactor. The sampling tube is a U-shaped tube, with one end extending from the top of the reactor into the bottom of the reactor, and the other end located on one side of the outer wall of the reactor. The sampling tube is vertically arranged on the side inside the reactor, and horizontal branch pipes are connected to the sampling tube at different heights. Sampling valves are installed at the bottom of the sampling tube and on the horizontal branch pipes. A plug is connected to the end of the sampling tube outside the reactor, and a first valve and a second valve are sequentially installed adjacent to each other on the side of the sampling tube near the plug.

[0010] Preferably, the plug includes a connecting block and a threaded post extending vertically to one side of the connecting block. The outer wall of the threaded post is provided with an external thread, and the inner end of the sampling tube located outside the hydrogenation reactor is provided with an internal thread that matches the external thread. The plug is threadedly connected to one end of the sampling tube.

[0011] Preferably, the sampling valve, the first valve, and the second valve are all electrically controlled valves.

[0012] Preferably, the highest point of the transverse branch pipe is located below the liquid level of the material inside the hydrogenation reactor.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] After the hydrogenation reaction is completed, the hydrogenation reactor of this invention does not require depressurization. It uses the pressure difference to draw the material from the hydrogenation reactor into the sampling tube for sampling. It can also sample materials at different liquid levels in the hydrogenation reactor, ensuring sampling accuracy, convenience and speed, reducing hydrogen consumption and saving costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure between the plug and the sampling tube of this utility model.

[0017] Figure Labels

[0018] 1. Hydrogenation vessel, 2. Sampling tube, 3. First valve, 4. Second valve, 5. Plug, 6. Threaded column, 7. Connecting block, 8. Horizontal branch pipe, 9. Sampling valve. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] like Figure 1-2 As shown, a portable sampling device for a lily aldehyde hydrogenation reactor includes a hydrogenation reactor 1 and a sampling tube 2 fixedly installed on the hydrogenation reactor 1. A sealed reaction environment is formed inside the hydrogenation reactor. The sampling tube 2 is a U-shaped tube. One end of the sampling tube 2 extends from the top of the hydrogenation reactor 1 into the bottom of the hydrogenation reactor 1, and the other end is located on one side of the outer wall of the hydrogenation reactor 1. The sampling tube 2 is vertically arranged on one side inside the hydrogenation reactor, and horizontal branch pipes 8 are connected to the sampling tube at different heights. Sampling valves 9 are installed at the bottom of the sampling tube 2 and on the horizontal branch pipes 8. A plug 5 is connected to the end of the sampling tube 2 outside the hydrogenation reactor 1. A first valve 3 and a second valve 4 are installed sequentially on the side of the sampling tube 2 near the plug 5.

[0021] Sampling valve 9, first valve 3, and second valve 4 are all electrically controlled valves. The sampling valves are explosion-proof and high-pressure resistant solenoid valves, which are existing technologies, and their specific structure and principle will not be described further. When multiple samples at different liquid levels are required, sampling valve 9 can be opened. If sampling is not required at some locations, sampling valve 9 at those locations can be closed. By controlling the opening and closing of sampling valve 9, the transverse branch pipe 8 can be connected to the sampling pipe 2, thereby allowing the sampled material to enter the sampling pipe. The highest point of the transverse branch pipe 8 is below the liquid level of the material in the hydrogenation reactor.

[0022] The plug 5 includes a connecting block 7 and a threaded post 6 extending vertically on one side of the connecting block 7. The outer wall of the threaded post 6 is provided with external threads. The sampling tube 2 located outside the hydrogenation reactor 1 has an internal thread inside the tube that matches the external threads. The plug 5 is connected to one end of the sampling tube 2 by threads.

[0023] Working principle:

[0024] After the hydrogenation reaction is completed, slowly open the first valve 3 and the second valve 4 on the sampling tube 2 and hold for a few seconds. At this time, due to the pressure difference between the sampling tube 2 and the hydrogenation vessel 1 (the hydrogenation vessel 1 is under positive pressure and the sampling tube 2 is under normal pressure), the material will be drawn from the hydrogenation vessel 1 into the sampling tube 2. The horizontal branch pipes 8 at different heights can achieve multiple sampling at different heights, making the determination of the lily aldehyde reaction endpoint more accurate. If sampling is not required at some locations, the sampling valve 9 on the horizontal branch pipe 8 at that location can be closed.

[0025] Then close the first valve 3 and the second valve 4, and remove the sampling tube plug 5 through the thread to prevent material from impacting the plug. Open the first valve 3 and the second valve 4 again, and the material will flow directly out of the sampling tube 2 and be discharged into the prepared collection bucket. After a few seconds, close the first valve 3 and the second valve 4 again. Repeat this operation of opening and closing the valves three times to flush the sampling tube 2, and then sample the material to ensure the accuracy of the sampling. After sampling, close all sampling valves 9, drain the excess material at the top of the sampling tube 2, close the first valve 3 and the second valve 4, install the plug 5, and continue to maintain the sampling tube 2 at normal pressure.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A portable sampling device for a lysmeral hydrogenation kettle, characterized in that: The hydrogenation kettle and the sampling tube installed on the hydrogenation kettle, the sampling tube is a U-shaped tube, one end of the sampling tube extends into the bottom of the hydrogenation kettle from the top of the hydrogenation kettle, the other end is located on one side of the outer wall of the hydrogenation kettle, the sampling tube is vertically arranged on one side in the hydrogenation kettle, and different height positions of the sampling tube are respectively connected with horizontal branch pipes, sampling valves are installed on the bottom of the sampling tube and the horizontal branch pipes; one end of the sampling tube located outside the hydrogenation kettle is connected with a plug, a first valve and a second valve are sequentially and adjacently installed on one side of the sampling tube close to the plug.

2. The portable sampling device for a lysmeral hydrogenation reactor according to claim 1, characterized in that: The plug comprises a connecting block and a threaded column vertically extending on one side of the connecting block, an outer thread is arranged on the outer wall of the threaded column, an inner thread matched with the outer thread is arranged in the tube at one end of the sampling tube located outside the hydrogenation kettle, and the plug is connected with one end of the sampling tube through the threads.

3. The portable sampling device for a lysmeral hydrogenation reactor according to claim 1, characterized in that: The sampling valve, the first valve and the second valve are all electrically controlled valves.

4. The portable sampling device for a lysmeral hydrogenation reactor according to claim 1, characterized in that: The highest horizontal branch pipe is below the material liquid level in the hydrogenation kettle.

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