Dimethyl sulfoxide microtube reaction device

Abstract

The utility model relates to the technical field of dimethyl sulfoxide production, in particular to a dimethyl sulfoxide microtube reaction device, which is characterized in that the bottom ends of a plurality of microtube reactors are communicated with a shell, one side of the shell is fixedly connected with a positioning mechanism, the positioning mechanism is fixedly connected with a micromixer, and the micromixer is matched with the plurality of microtube reactors; the microtube reactor comprises a tube body, the tube body is fixedly connected to the mounting plate, a first through hole is formed in the bottom end of the tube body, and a one-way valve is fixedly connected to the upper end of the first through hole. According to the utility model, raw materials are preheated, fed into the micro-mixer, mixed and introduced into the pipe body, the mixed liquid is subjected to oxidation reaction in the flowing process to generate dimethyl sulfoxide, the dimethyl sulfoxide is released into the shell from the first through hole, and the dimethyl sulfoxide flows out after being mixed and homogenized in the shell, so that continuous reaction can be realized by utilizing the device, the production efficiency is high, the side reaction is few, and the production cost is low. The product purity is high.

Description

Technical Field

[0001] The utility model relates to the technical field of dimethyl sulfoxide production, in particular to a dimethyl sulfoxide microtube reaction device. Background Technique

[0002] Dimethyl sulfoxide is a sulfur-containing organic compound, which is a colorless, odorless and transparent liquid at room temperature. It is a hygroscopic and flammable liquid, with the characteristics of high polarity, high boiling point, good thermal stability, aprotic and miscible with water. It can dissolve in most organic substances such as ethanol, propanol, benzene and chloroform, and is known as the "universal solvent". It can be used as an organic solvent, reaction medium and organic synthesis intermediate, and can also be used as a dyeing solvent, decolorant, dyeing carrier for synthetic fibers, and absorbent for recovering acetylene and sulfur dioxide.

[0003] At present, in the production process of dimethyl sulfoxide, dimethyl sulfide is usually prepared from methanol and carbon disulfide, and dimethyl sulfide is oxidized into dimethyl sulfoxide by oxygen and nitrogen dioxide. The above process is an intermittent batch reaction, which has problems such as long reaction cycle, inaccurate control of process parameters such as temperature and material ratio, resulting in more side reactions, small product production capacity, low purity, and poor production safety. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problems of low production efficiency, many side reactions, low product purity and poor production safety in the prior art, and to propose a dimethyl sulfoxide microtube reaction device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] Design a dimethyl sulfoxide microtube reaction device, including a housing, an installation plate is fixedly connected to the housing, a number of microtube reactors are connected at equal intervals along the axial center line on the installation plate, the bottoms of the number of microtube reactors are all communicated with the housing, a positioning mechanism is fixedly connected to one side of the housing, a micro mixer is fixedly connected to the positioning mechanism, and the micro mixer cooperates with the number of microtube reactors;

[0007] The microtube reactor includes a tube body, the tube body is fixedly connected to the installation plate, a first through hole is opened at the bottom end of the tube body, and a one-way valve is fixedly connected to the upper end of the first through hole.

[0008] Preferably, an aging cavity is provided at the bottom end of the housing, and a discharge pipe is communicated with the bottom of the aging cavity.

[0009] Preferably, the positioning mechanism includes a mounting block fixedly connected to the housing. A movable plate is slidably inserted into the mounting block. A connecting block is fixedly connected to the upper end of the movable plate, and the connecting block is connected to the micro mixer. A limiting hole is formed in the movable plate, and a limiting pin is inserted into the mounting block, and the limiting pin passes through the limiting hole.

[0010] Preferably, the micro mixer includes a fixed disk fixedly connected to the connecting block. A chamber is formed in the fixed disk. A conduit communicates with the upper end of the chamber. A plurality of grooves are formed at the bottom end of the fixed disk, and each groove is adapted to a corresponding tube body, and each groove communicates with the chamber through a second through hole.

[0011] Preferably, a sealing ring is connected to the inner wall of each groove.

[0012] Preferably, a first feed pipe, a second feed pipe and a third feed pipe are connected to the conduit, and micro filters are respectively provided on the first feed pipe, the second feed pipe and the third feed pipe.

[0013] Preferably, the first feed pipe, the second feed pipe and the third feed pipe are all double-layer pipes.

[0014] The beneficial effects of a dimethyl sulfoxide microtube reaction device proposed by the present invention are as follows:

[0015] Dimethyl sulfide, hydrogen peroxide and acetone are respectively preheated and filtered through the first feed pipe, the second feed pipe and the third feed pipe, and are fed into the chamber of the micro mixer through the conduit for mixing reaction to release most of the heat. The micro mixer timely removes a large amount of heat generated during the mixing process by circulating cooling water or ice brine to prevent a runaway temperature rise and cause a safety accident. The mixed liquid then enters the tube body of the microtube reactor, and the raw material mixed liquid undergoes an oxidation reaction during the flow in the tube body, and finally flows into the aging chamber through the first through hole. The mixed liquid in a plurality of microtube reactors is kept warm and delayed in the aging chamber and then discharged through the discharge pipe to the next process step. A one-way valve is provided at the first through hole to prevent the mixed liquid in the aging chamber from flowing back into the tube body. In this device, the micro mixer further mixes the raw material mixed liquid, releases a large amount of heat and removes it in time. Hydrogen peroxide reacts with dimethyl sulfide to form dimethyl sulfoxide during the flow inside the micro mixer, the microtube reactor and the aging chamber, which can realize continuous microreaction, with high production efficiency, few side reactions and high product purity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a dimethyl sulfoxide microtube reaction device proposed by the present invention Figure 1 ;

[0017] Figure 2 Structural schematic diagram of a dimethyl sulfoxide microtube reaction device proposed by the present utility model Figure 2 ;

[0018] Figure 3 Cross-sectional structural schematic diagram of a dimethyl sulfoxide microtube reaction device proposed by the present utility model;

[0019] Figure 4 is Figure 3 Partial enlarged structural schematic diagram at position A above.

[0020] In the figure: 1, housing; 2, mounting plate; 3, microtube reactor; 4, discharge pipe; 5, positioning mechanism; 6, micromixer; 11, aging chamber, 31, tube body; 32, first through hole; 33, check valve; 51, mounting block; 52, movable plate; 53, connecting block; 54, limiting hole; 55, limiting pin; 61, fixed disk; 62, chamber; 63, conduit; 64, groove; 65, second through hole; 66, first feed pipe; 67, second feed pipe; 68, third feed pipe; 69, microfilter. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] Embodiment 1: Refer to Figures 1-4 , a dimethyl sulfoxide microtube reaction device, including a housing 1, a mounting plate 2 is fixedly connected to the housing 1, a plurality of microtube reactors 3 are connected at equal intervals along the axial center line direction on the mounting plate 2, the bottoms of the plurality of microtube reactors 3 are all communicated with the housing 1, a positioning mechanism 5 is fixedly connected to one side of the housing 1, a micromixer 6 is fixedly connected to the positioning mechanism 5, the micromixer 6 cooperates with the plurality of microtube reactors 3, an aging chamber is provided at the bottom of the housing 1, and a discharge pipe 4 is communicated with the bottom of the aging chamber;

[0023] The microtube reactor 3 includes a tube body 31, the tube body 31 is fixedly connected to the mounting plate 2, a first through hole 32 is opened at the bottom end of the tube body 31, and a check valve 33 is fixedly connected to the upper end of the first through hole 32.

[0024] Working process:

[0025] After the micro-mixer 6 is positioned by the positioning mechanism 5, it is connected to the upper end of the pipe body 31. The mixed liquid is introduced into the micro-mixer 6, and the micro-mixer 6 disperses and introduces the mixed liquid into different pipe bodies 31. In the mixed liquid, hydrogen peroxide and dimethyl sulfide undergo an oxidation reaction to generate dimethyl sulfoxide. The generated dimethyl sulfoxide passes through the one-way valve 33 and is released from the first through-hole 32 to the housing 1. After the housing 1 collects, mixes, and homogenizes the dimethyl sulfoxide released from the first through-hole 32, it is released from the discharge pipe 4 and flows to the next process step;

[0026] By adding the raw material mixed liquid into different pipe bodies 31, dimethyl sulfoxide is generated by oxidation during the flow of the mixed liquid, thus realizing continuous production and improving production efficiency.

[0027] Example 2: Refer to Figure 2 , as another preferred embodiment of the present utility model, the difference from Example 1 is that the positioning mechanism 5 includes a mounting block 51. The mounting block 51 is fixedly connected to the housing 1. A movable plate 52 is slidably inserted into the mounting block 51. The upper end of the movable plate 52 is fixedly connected with a connecting block 53. The connecting block 53 is connected to the micro-mixer 6. A limiting hole 54 is opened on the movable plate 52, and a limiting pin 55 is inserted into the mounting block 51. The limiting pin 55 passes through the limiting hole 54. The connecting block 53 drives the micro-mixer 6 to move. The connecting block 53 slides on the mounting block 51 through the movable plate 52, so that the micro-mixer 6 is accurately sleeved on the pipe body 31, facilitating the connection between the micro-mixer 6 and the pipe body 31.

[0028] Example 3: Refer to Figure 3 , as another preferred embodiment of the present utility model, the difference from Example 2 is that the micro-mixer 6 includes a fixed disk 61. The fixed disk 61 is fixedly connected to the connecting block 53. A chamber 62 is opened in the fixed disk 61. The upper end of the chamber 62 is communicated with a conduit 63. A plurality of grooves 64 are opened at the bottom end of the fixed disk 61. Each groove 64 is matched with a corresponding pipe body 31. Each groove 64 is communicated with the chamber 62 through a second through-hole 65. A sealing ring is connected to the inner wall of each groove 64. The conduit 63 is connected to a first feed pipe 66, a second feed pipe 67, and a third feed pipe 68. Micro-filters 69 are respectively provided on the first feed pipe 66, the second feed pipe 67, and the third feed pipe 68. The first feed pipe 66, the second feed pipe 67, and the third feed pipe 68 are all double-layer pipes. Raw material liquid is introduced into the inner pipe, and heating medium is introduced into the outer pipe. Dimethyl sulfide, oxygen, and acetone are respectively preheated through the first feed pipe 66, the second feed pipe 67, and the third feed pipe 68 and filtered through the micro-filters, and then introduced into the chamber 62 through the conduit 63. After the liquids are mixed in the chamber 62, they are released from different second through-holes 65. The mixed liquid released from the second through-holes 65 enters different pipe bodies 31, and the raw material mixed liquid is evenly introduced into different pipe bodies 31.

[0029] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, making equivalent substitutions or changes, shall be covered by the protection scope of the present utility model.

Claims

1. A dimethyl sulfoxide microtubule reaction device, characterized in that Comprising a housing (1), wherein: A mounting plate (2) is fixedly connected to the housing (1), a plurality of microtube reactors (3) are connected to the mounting plate (2) at equal intervals along the axial line direction, the bottom ends of the plurality of microtube reactors (3) communicate with the housing (1), a positioning mechanism (5) is fixedly connected to one side of the housing (1), a micromixer (6) is fixedly connected to the positioning mechanism (5), and the micromixer (6) cooperates with the plurality of microtube reactors (3); The microtube reactor (3) comprises a tube body (31), the tube body (31) is fixedly connected to the mounting plate (2), a first through-hole (32) is opened at the bottom end of the tube body (31), and a check valve (33) is fixedly connected to the upper end of the first through-hole (32).

2. The dimethyl sulfoxide microtube reaction device according to claim 1, wherein An aging chamber (11) is provided at the bottom end of the housing (1), and a discharge pipe (4) communicates with the bottom of the aging chamber (11).

3. The dimethyl sulfoxide microtubule reaction device according to claim 1, wherein The positioning mechanism (5) comprises a mounting block (51), the mounting block (51) is fixedly connected to the housing (1), a movable plate (52) is slidably inserted into the mounting block (51), a connecting block (53) is fixedly connected to the upper end of the movable plate (52), the connecting block (53) connects the micromixer (6), a limiting hole (54) is opened on the movable plate (52), a limiting pin (55) is inserted into the mounting block (51), and the limiting pin (55) passes through the limiting hole (54).

4. The dimethyl sulfoxide microtubule reaction device according to claim 3, wherein The micromixer (6) comprises a fixed disk (61), the fixed disk (61) is fixedly connected to the connecting block (53), a chamber (62) is opened in the fixed disk (61), a conduit (63) communicates with the upper end of the chamber (62), a plurality of grooves (64) are opened at the bottom end of the fixed disk (61), each groove (64) cooperates with a corresponding tube body (31), and each groove (64) communicates with the chamber (62) through a second through-hole (65).

5. The dimethyl sulfoxide microtubule reaction device according to claim 4, wherein Sealing rings are connected to the inner walls of each of the grooves (64).

6. The dimethyl sulfoxide microtube reaction device according to claim 4, wherein A first feed pipe (66), a second feed pipe (67) and a third feed pipe (68) are connected to the conduit (63), and microfilters (69) are respectively provided on the first feed pipe (66), the second feed pipe (67) and the third feed pipe (68).

7. The dimethyl sulfoxide microtubule reaction device according to claim 6, wherein, The first feed pipe (66), the second feed pipe (67) and the third feed pipe (68) are all double-layer pipes.

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