Solvent reflux water distribution device

Abstract

The utility model relates to the technical field of liquid separation, in particular to a solvent backflow water distribution device which comprises a solvent storage pipe, and the solvent storage pipe sequentially comprises a top end port, a connecting section, a storage section and a backflow section from top to bottom; an air inlet and a liquid outlet are formed in the connecting section, the air inlet is higher than the liquid outlet, and a first cock is arranged between the storage section and the backflow section; the air inlet is connected with the steam conduit and is higher than the top end of the steam conduit; the liquid outlet is connected with the water storage pipe and is higher than the top end of the water storage pipe; the bottom end of the steam conduit is provided with a bottom end port, the lower side surface of the steam conduit is provided with a solvent reflux inlet, and the reflux section is connected with the solvent reflux inlet. The device can continuously and efficiently separate a solvent with the density larger than that of water from water, can also enable the solvent in the solvent storage pipe to flow back to a reaction system at any time, and is flexible to operate and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid separation, in particular to a solvent reflux water separation device. Background Art

[0002] In the field of organic chemistry, there are many organic chemical reactions (such as etherification reactions) that produce water as a byproduct, many of which are reversible reactions. In these reversible reactions, the presence of water will be detrimental to the forward reaction. If the generated water is continuously separated from the reaction system, the efficiency of the forward reaction will be improved. In organic reaction systems, water is generally removed by evaporation, but during the evaporation process, some organic matter may co-exist with water in the reaction system, producing mixed vapor of water and organic matter, and this part of the organic matter needs to be further separated from the water.

[0003] In the prior art, an oil-water separator can be used to separate water and a solvent with a density lower than that of water, which are incompatible with each other. However, there is no mature separation device or separation method for solvents with a density higher than that of water (such as chloroform, carbon tetrachloride, etc.). The existing method for separating solvents with a density higher than that of water and water is generally to azeotropically evaporate water and the solvent in the reaction system, and then re-add the solvent to the reaction system to promote the reaction to proceed in the forward direction. The evaporated steam is generally collected in a specific container and then allowed to stand for stratification, and then separated and recycled by a separatory funnel or other device.

[0004] However, the existing method for separating a solvent with a density greater than that of water and water cannot achieve continuous separation of the solvent and water, nor can the azeotropically evaporated solvent be directly refluxed into the reaction system, resulting in complex operation and low efficiency. Utility Model Content

[0005] In view of the technical problem that the existing method for separating a solvent with a density greater than that of water and water cannot achieve continuous separation of the solvent and water, and cannot directly return the solvent evaporated from the azeotropy to the reaction system, the utility model provides a solvent reflux water separation device, which can collect the steam generated by the azeotropy of the solvent with a density greater than that of water and water into a solvent storage tube and allow it to stand and separate, thereby further continuously and efficiently separating the solvent with a density greater than that of water and water; the solvent in the solvent storage tube can be returned to the reaction system at any time, and the operation is flexible and the use is convenient.

[0006] The technical solution of the utility model is:

[0007] A solvent reflux water diversion device comprises a solvent storage tube, which comprises a top opening, a connecting section, a storage section and a reflux section from top to bottom; an air inlet and a liquid outlet are provided on the connecting section, the air inlet is higher than the liquid outlet, and a first cock is provided between the storage section and the reflux section; the air inlet is connected to a steam conduit, and the air inlet is higher than the top of the steam conduit; the liquid outlet is connected to a water storage tube, and the liquid outlet is higher than the top of the water storage tube; a bottom opening is provided at the bottom end of the steam conduit, a solvent reflux opening is provided on the lower side of the steam conduit, and the reflux section is connected to the solvent reflux opening.

[0008] Furthermore, a baffle is arranged above the liquid outlet and obliquely downward toward the inside of the solvent storage tube. The baffle can prevent liquid generated by steam condensation from flowing along the liquid outlet into the water storage tube, thereby preventing water in the water storage tube from being contaminated.

[0009] Furthermore, the solvent storage tube, the steam conduit, and the water storage tube are all made of glass.

[0010] Furthermore, the top port is an inner frosted port, and the bottom port is an outer frosted port, and other chemical glass instruments can be connected through the bottom port and the top port. The top port is an inner frosted port and the bottom port is an outer frosted port, which can improve the air tightness of the solvent reflux water separation device after being connected to other chemical glass instruments, and prevent air and liquid leakage at the connection.

[0011] Furthermore, the solvent storage tube is marked with scales, which facilitates reading the volume of the liquid in the solvent storage tube when the first stopcock is closed, thereby facilitating quantitative testing and analysis.

[0012] Furthermore, a second stopcock is provided at the lower end of the water storage pipe. Closing the second stopcock can store the separated water in the water storage pipe; opening the second stopcock can discharge the water stored in the water storage pipe. The operation is convenient and the application is flexible.

[0013] Furthermore, the water storage tube is marked with scales, which facilitates reading the volume of water in the water storage tube when the second stopcock is closed, thereby facilitating quantitative testing and analysis.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a solvent reflux water separation device, a steam conduit and a steam reflux pipe, which can guide the steam generated by the azeotropic coexistence of the solvent with a density greater than that of water in the reaction system and water into a condenser connected through a top port, and the steam is condensed and refluxed into the solvent storage pipe, and the solvent and water are naturally layered in the solvent storage pipe, with the solvent being in the lower layer and the water being in the upper layer; as the steam reflux proceeds, the liquid level in the solvent storage pipe gradually rises to the liquid outlet, and the upper layer of water can enter the water storage pipe through the liquid outlet and the water guide pipe for separation, so that the solvent with a density greater than that of water and water can be efficiently separated; when a certain amount of solvent is stored in the solvent storage pipe, the first stopcock can be opened to pass this part of the solvent into the solvent reflux pipe and the solvent reflux port, and reflux to the reaction system, and the reflux of the solvent can be started or stopped at any time by adjusting the stopcock, and the operation is flexible and the use is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the solvent reflux water separation device in Example 1.

[0018] In the figure, 1-solvent storage tube, 11-top port, 12-baffle, 13-first stopcock, 14-solvent reflux pipe, 2-steam conduit, 21-steam reflux pipe, 22-bottom port, 3-water storage tube, 31-water guide pipe, 32-second stopcock. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] Example 1

[0021] A solvent reflux water separation device comprises a solvent storage tube 1, which comprises a top opening 11, a connecting section, a storage section, and a reflux section from top to bottom, wherein the top opening 11 is an inner frosted opening; an air inlet and a liquid outlet are arranged on the connecting section, wherein the air inlet is higher than the liquid outlet, and a baffle 12 is arranged obliquely downward above the liquid outlet toward the inside of the solvent storage tube; a scale is marked on the storage section, and a first cock 13 is arranged between the storage section and the reflux section;

[0022] The air inlet is connected to the steam conduit 2 through a steam reflux pipe 21, the air inlet is higher than the top of the steam conduit 2, a solvent reflux port is arranged on the side of the lower end of the steam conduit 2, the bottom end of the solvent storage pipe 1 is connected to the solvent reflux port through a solvent reflux pipe 14, the bottom end of the solvent storage pipe 1 is higher than the solvent reflux port; the bottom end of the steam conduit 2 is arranged with a bottom end opening 22, the bottom end opening 22 is an external frosted port;

[0023] The liquid outlet is connected to the water storage tube 3 through the water guide tube 31, and the liquid outlet is higher than the top of the water storage tube 3; the water storage tube 3 is marked with scales, and a second cock 32 is provided at the lower end of the water storage tube 3;

[0024] The materials of the solvent storage tube 1, the steam conduit 2 and the water storage tube 3 are all glass.

[0025] The use principle of Example 1 is:

[0026] (1) Connect the bottom port 22 of the solvent reflux water separation device to the reaction bottle, connect the top port 11 to the reflux condenser, close the first stopcock 13 and the second stopcock 32, heat the reaction bottle, and make the water in the reaction bottle and the solvent with a density higher than that of water co-exist. The steam generated by the co-existence enters the steam conduit 2 and the steam reflux pipe 21 in sequence through the bottom port 22, enters the external reflux condenser through the top port 11, condenses and liquefies, refluxes to the solvent storage pipe 1, and separates into layers, wherein the upper layer is water and the lower layer is the solvent with a density higher than that of water.

[0027] (2) The liquid in the solvent storage tube 1 continues to accumulate until the liquid level rises to the liquid outlet, and the upper layer of water flows out from the liquid outlet and enters the water storage tube 3 through the water guide pipe 31;

[0028] (3) When it is necessary to discharge the water in the water storage tube 3, open the second stopcock 32 to discharge the water; when it is necessary to return the solvent with a density greater than that of water in the solvent storage tube 1 to the reaction bottle, open the first stopcock 13 to pass the solvent into the solvent reflux pipe 14 and the steam conduit 2 in sequence, and the solvent enters the reaction bottle through the bottom port 22; before the interface between the solvent with a density greater than that of water and the water layer drops to the position of the first stopcock 13, close the first stopcock 13 to prevent water from returning to the reaction bottle.

[0029] In steps (1) to (3), the scales in the solvent storage tube 1 and the water storage tube 3 can be observed at any time to obtain volume data of the solvent with a density higher than that of water and water, which is convenient for quantitative testing and analysis.

[0030] Example 2

[0031] A solvent reflux water separation device is provided. Based on the first embodiment, the solvent reflux water separation device is an integrally formed glass instrument.

[0032] Example 3

[0033] A solvent reflux water separation device is provided. Based on Example 1, a solvent storage pipe 1, a solvent reflux pipe 14, a steam conduit 2, a steam reflux pipe 21, a water storage pipe 3 and a water diversion pipe 31 are all connected by rubber pipes.

[0034] Example 4

[0035] A solvent reflux water separation device, based on Example 1, the solvent storage pipe 1, the solvent reflux pipe 14, the steam conduit 2, the steam reflux pipe 21, the water storage pipe 3 and the water diversion pipe 31 are all connected through frosted ports.

[0036] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who is familiar with the present technical field may easily think of changes or substitutions within the technical scope disclosed in the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. A solvent reflux water separation device, comprising a solvent storage tube, characterized in that: The solvent storage tube includes, from top to bottom, a top opening, a connecting section, a storage section, and a reflux section; an air inlet and a liquid outlet are provided on the connecting section, the air inlet is higher than the liquid outlet, and a first stopcock is provided between the storage section and the reflux section; the air inlet is connected to the steam conduit, and the air inlet is higher than the top of the steam conduit; the liquid outlet is connected to the water storage tube, and the liquid outlet is higher than the top of the water storage tube; a bottom opening is provided at the bottom end of the steam conduit, a solvent reflux port is provided on the lower side of the steam conduit, and the reflux section is connected to the solvent reflux port.

2. The solvent reflux water separation device according to claim 1, characterized in that: A baffle is arranged obliquely downward above the liquid outlet and faces the interior of the solvent storage tube.

3. The solvent reflux water separation device according to claim 1, characterized in that: The materials of the solvent storage tube, steam conduit and water storage tube are all glass.

4. The solvent reflux water separation device according to claim 3, characterized in that: The top opening is an inner frosted opening, and the bottom opening is an outer frosted opening.

5. The solvent reflux water separation device according to claim 1, characterized in that: The storage section of the solvent storage tube is marked with graduations.

6. The solvent reflux water separation device according to claim 1, characterized in that: A second cock is arranged at the lower end of the water storage pipe.

7. The solvent reflux water separation device according to claim 5, characterized in that: The water storage tube is marked with graduations.

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