Toluene purification and neutralization reactor

Abstract

The utility model provides a toluene purification neutralization reactor which comprises a tank body and a filter plate, the tank body is used for containing sodium hydroxide solids, the filter plate is arranged in the tank body and supported below the sodium hydroxide solids, and the filter plate is used for filtering a salt solution generated after toluene neutralization reaction. A methylbenzene liquid inlet is formed in the lower part of the tank body, a methylbenzene liquid outlet is formed in the upper part of the tank body, a feeding hole is formed in the top of the tank body, and a liquid outlet is formed in the bottom of the tank body; and a buffer shell surrounding the periphery of the lower part of the toluene liquid inlet is arranged in the tank body. According to the methylbenzene purification and neutralization reactor provided by the utility model, methylbenzene flows through the sodium hydroxide solid from bottom to top, the sodium hydroxide solid and redundant acid in the methylbenzene are subjected to neutralization reaction, acidic substances in the methylbenzene can be effectively removed, and the impact effect of the methylbenzene on the sodium hydroxide solid can be reduced by arranging the buffer shell; toluene orderly enters sodium hydroxide solids, the efficiency of the neutralization reaction is improved, and the purity of the toluene is effectively improved through the structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of neutralization reaction equipment, and more specifically relates to a toluene purification neutralization reactor. Background Art

[0002] In the preparation of drugs such as anthelmintics, pesticides and rodenticides, in order to achieve the recycling of toluene, alkaline substances are often used to remove acidic substances in toluene. At present, the toluene that needs to be recycled is generally treated by neutralization, washing and dehydration. The pH value of the toluene recovered after treatment is still acidic, which causes adverse conditions for the subsequent alkaline reaction system, consumes the alkaline raw materials in the alkaline reaction system, affects the raw material ratio in the subsequent product preparation process, and then leads to inaccurate feeding ratio, which not only affects the reaction efficiency between materials, but also affects the product quality and causes waste of raw materials. Utility Model Content

[0003] The utility model aims to provide a toluene purification and neutralization reactor, which can completely remove the acidic substances remaining in toluene, ensure the purity of the recovered toluene, and improve the preparation quality of subsequent products.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a toluene purification neutralization reactor is provided, comprising a tank body and a filter plate, the tank body is used to contain sodium hydroxide solid, the filter plate is arranged in the tank body and supported below the sodium hydroxide solid, the filter plate is used to filter the salt solution generated after the toluene neutralization reaction, the lower part of the tank body is provided with a toluene inlet located above the filter plate, the upper part of the tank body is provided with a toluene outlet located above the sodium hydroxide, the top of the tank body is provided with a feed port, and the bottom of the tank body is provided with a drain port for discharging the salt solution;

[0005] A buffer shell is arranged in the tank body and is arranged around the outer periphery below the toluene inlet. Sodium hydroxide solid is contained in the buffer shell. The buffer shell is used for buffering and guiding the toluene to flow upward.

[0006] In a possible implementation, the buffer shell includes a horizontally arranged lower bottom plate and a buffer ring plate connected to the outer edge of the lower bottom plate, and the upper edge of the buffer ring plate extends upward to be higher than the toluene inlet.

[0007] In some embodiments, the lower bottom plate has an arc-shaped edge, the lower edge of the buffer ring plate is connected to the arc-shaped edge, and the buffer ring plate gradually extends from bottom to top toward a side away from the toluene inlet.

[0008] In a possible implementation, a filter cloth is stacked on the filter plate, and an edge of the filter cloth is arranged between the outer peripheral wall of the filter plate and the inner peripheral wall of the tank body.

[0009] In a possible implementation, a first ring seat for supporting the filter plate is fixedly connected to the inner wall of the tank body, and a through hole is provided in the middle of the first ring seat for allowing the salt solution to flow downward.

[0010] In a possible implementation, a layered filter plate is further provided in the tank body, the layered filter plate is located above the buffer shell and is spaced apart from the filter plate, and the layered filter plate is used to separate sodium hydroxide solids of different particle sizes.

[0011] In some embodiments, a plurality of supporting angle seats are connected to the inner peripheral wall of the tank body, a second ring plate is provided on the supporting angle seat, and the layered filter plate is arranged above the second ring plate.

[0012] In a possible implementation, a first material change door and a second material change door are hinged on the side of the tank body, both of which are made of transparent material components, the lower edge of the first material change door is flush with the top surface of the filter plate, and the lower edge of the second material change door is flush with the top surface of the layered filter plate.

[0013] In a possible implementation, a shielding net covering the sodium hydroxide solid is further provided in the tank body, and the shielding net is located below the toluene liquid outlet to prevent the sodium hydroxide solid from entering the toluene liquid outlet.

[0014] In some embodiments, the outer ring of the shielding net is provided with a plurality of magnetic blocks arranged at intervals, and the magnetic blocks are used to be adsorbed on the inner wall of the tank body to tighten the shielding net.

[0015] Compared with the prior art, the scheme shown in the embodiment of the present application utilizes a filter plate arranged in the tank body to support the sodium hydroxide solid. The toluene entering the toluene inlet at the bottom of the tank body flows through the sodium hydroxide solid from bottom to top. The sodium hydroxide solid reacts with the excess acid in the toluene to effectively remove the acidic substances in the toluene. The setting of the buffer shell can reduce the impact of toluene on the sodium hydroxide solid, so that the toluene enters between the sodium hydroxide solids in an orderly manner, thereby improving the efficiency of the neutralization reaction. The above structure effectively improves the purity of toluene and ensures the normal use of subsequent toluene. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the main cross-sectional structure of a toluene purification and neutralization reactor provided in an embodiment of the utility model;

[0018] Figure 2 For the utility model embodiment Figure 1 The partially enlarged structural diagram of middle Ⅰ;

[0019] Figure 3 For the utility model embodiment Figure 1 The schematic diagram of the partial enlarged structure of middle Ⅱ;

[0020] Figure 4 For the utility model embodiment Figure 1 Schematic diagram of the top view structure of the middle shielding net.

[0021] Among them, the reference numerals in the figure are:

[0022] 1. Tank body; 11. Toluene inlet; 12. Toluene outlet; 13. Feed inlet; 14. Drain outlet; 15. First ring seat; 16. First material change door; 17. First material change door; 2. Filter plate; 3. Buffer shell; 31. Lower bottom plate; 32. Buffer ring plate; 4. Filter cloth; 5. Layered filter plate; 51. Supporting angle seat; 52. Second ring plate; 6. Shielding net; 61. Magnetic block. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0025] Please also read Figures 1 to 4, the toluene purification neutralization reactor provided by the utility model is now described. The toluene purification neutralization reactor comprises a tank body 1 and a filter plate 2, the tank body 1 is used to contain sodium hydroxide solid, the filter plate 2 is arranged in the tank body 1 and supported below the sodium hydroxide solid, the filter plate 2 is used to filter the salt solution produced after the toluene neutralization reaction, the lower part of the tank body 1 is provided with a toluene inlet 11 located above the filter plate 2, the upper part of the tank body 1 is provided with a toluene outlet 12 located above the sodium hydroxide, the top of the tank body 1 is provided with a feed inlet 13, and the bottom of the tank body 1 is provided with a drain port 14 for discharging the salt solution;

[0026] A buffer shell 3 is provided in the tank body 1 and is arranged around the outer periphery below the toluene inlet 11. Solid sodium hydroxide is contained in the buffer shell 3. The buffer shell 3 is used for buffering and guiding the toluene to flow upward.

[0027] Compared with the prior art, the toluene purification neutralization reactor provided in the present embodiment uses a filter plate 2 arranged in a tank body 1 to support sodium hydroxide solid. The toluene entering through the toluene inlet 11 at the bottom of the tank body 1 flows through the sodium hydroxide solid from bottom to top. The sodium hydroxide solid reacts with excess acid in the toluene to effectively remove the acidic substances in the toluene. The setting of the buffer shell 3 can reduce the impact of toluene on the sodium hydroxide solid, so that the toluene enters between the sodium hydroxide solids in an orderly manner, thereby improving the efficiency of the neutralization reaction. The above structure effectively improves the purity of toluene and ensures the normal use of subsequent toluene.

[0028] In this embodiment, the acidic substance in toluene can react with the sodium hydroxide solid to generate a salt solution, and the drain port 14 at the bottom of the tank body 1 is connected to the external salt solution tank body 1, so as to facilitate the centralized collection of the salt solution. The filter plate 2 can not only reliably support the sodium hydroxide solid, but also filter the salt solution, thereby improving the purity of the salt solution and ensuring the quality of the salt solution.

[0029] Since toluene is an organic matter and its density is less than that of the salt solution, the toluene will be suspended above the salt solution after the neutralization reaction and discharged through the toluene outlet 12, while the salt solution flows through the filter plate 2 under the action of gravity and enters the drain port 14 at the bottom of the tank body 1.

[0030] The setting of the buffer shell 3 can reduce the impact of toluene on the sodium hydroxide solid, so that the toluene enters between the sodium hydroxide solids in an orderly manner, increases the contact area between the acidic substances in the toluene and the sodium hydroxide solid, and improves the efficiency of the neutralization reaction between the substances.

[0031] In one possible implementation, see Figures 1 to 4The buffer shell 3 includes a horizontally arranged lower bottom plate 31 and a buffer ring plate 32 connected to the outer edge of the lower bottom plate 31 , and the upper edge of the buffer ring plate 32 extends upward to be higher than the toluene inlet 11 .

[0032] In this embodiment, the buffer shell 3 is used to allow toluene to enter the gaps of the sodium hydroxide solid evenly from bottom to top, so that the acidic substances in the toluene can fully react with the sodium hydroxide solid, and the acidic substances in the toluene can be effectively removed.

[0033] Specifically, the buffer housing 3 is a structure in which a lower bottom plate 31 and a buffer ring plate 32 are combined, and the two form a cavity structure with an opening facing upward. When toluene enters the cavity horizontally from the toluene inlet 11, it can be supplied in an orderly manner from bottom to top, avoiding the impact of toluene on the sodium hydroxide solid, allowing toluene to fully contact the sodium hydroxide solid, improving the efficiency of the neutralization reaction and generating a salt solution.

[0034] For some examples, see Figures 1 to 4 The lower bottom plate 31 has an arc-shaped edge, the lower edge of the buffer ring plate 32 is connected to the arc-shaped edge, and the buffer ring plate 32 gradually extends from bottom to top toward a side away from the toluene inlet 11. The horizontal projection of the buffer ring plate 32 is an arc, so that the toluene entering the toluene inlet 11 can be effectively dispersed, reducing the flow resistance and improving the smoothness of the flow.

[0035] In one possible implementation, see Figures 1 to 4 , a filter cloth 4 is stacked above the filter plate 2, and the edge of the filter cloth 4 is arranged between the outer peripheral wall of the filter plate 2 and the inner peripheral wall of the tank body 1. The filter cloth 4 arranged above the filter plate 2 can effectively filter out impurities in the salt solution, and at the same time can prevent the sodium hydroxide solid above from falling to the bottom of the filter plate 2, thereby ensuring the purity of the salt solution flowing to the bottom of the filter plate 2.

[0036] In one possible implementation, see Figures 1 to 4 A first ring seat 15 for supporting the filter plate 2 is fixedly connected to the inner wall of the tank body 1, and a through hole is provided in the middle of the first ring seat 15 for allowing the salt solution to flow downward.

[0037] In this embodiment, the first ring seat 15 extends along the circumference of the tank body 1 in a closed ring shape, and is used to support the bottom of the filter plate 2 to ensure the stability of the position of the filter plate 2. The through hole in the center of the first ring seat 15 allows the salt solution to flow smoothly downward into the drain port 14.

[0038] In one possible implementation, see Figures 1 to 4 A layered filter plate 5 is also provided in the tank body 1. The layered filter plate 5 is located above the buffer shell 3 and is spaced apart from the filter plate 2. The layered filter plate 5 is used to separate sodium hydroxide solids of different particle sizes.

[0039] In this embodiment, the layered filter plate 5 can separate sodium hydroxide solids of different particle sizes at different heights to achieve a layered effect of sodium hydroxide solids. The layered filter plate 5 is used to support sodium hydroxide solids with smaller particle sizes, and the filter plate 2 is used to support sodium hydroxide solids with larger particle sizes. The toluene overflowing from the buffer shell 3 is first dispersed into the sodium hydroxide solids with larger particle sizes, and undergoes a preliminary neutralization reaction therewith, and then gradually passes upward through the sodium hydroxide with smaller particle sizes. The acidic substances in the toluene further fully react with the sodium hydroxide solids with smaller particle sizes, thereby achieving effective removal of the acidic substances and ensuring the effectiveness of the neutralization reaction.

[0040] For some examples, see Figures 1 to 4 A plurality of supporting angle seats 51 are connected to the inner peripheral wall of the tank body 1 , a second ring plate 52 is provided on the supporting angle seat 51 , and the layered filter plate 5 is arranged above the second ring plate 52 .

[0041] In this embodiment, multiple supporting angle seats 51 are provided on the inner wall of the tank body 1 to effectively support the second ring seat above, and then the second ring seat is supported below the layered filter plate 5. The above structure facilitates the removal of the layered filter plate 5, facilitates the cleaning and maintenance of the inside of the tank body 1, and helps to improve the convenience of operation.

[0042] In one possible implementation, see Figures 1 to 4 The side of the tank body 1 is hinged with a first material changing door 16 and a second material changing door 17, both of which are transparent material components. The lower edge of the first material changing door 16 is flush with the top surface of the filter plate 2, and the lower edge of the second material changing door 17 is flush with the top surface of the layered filter plate 5.

[0043] In this embodiment, the first material changing door 16 and the second material changing door 17 are both made of transparent materials. The first material changing door 16 is located between the filter plate 2 and the layered filter plate 5, and the second material changing door 17 is arranged higher than the layered filter plate 5, so that the sodium hydroxide solids remaining at different heights can be effectively observed. When new sodium hydroxide needs to be added, the sodium hydroxide solids on the filter plate 2 and the salt solution impurities in the tank body 1 can be discharged by opening the first material changing door 16, and the sodium hydroxide solids on the layered filter plate 5 and the salt solution impurities in the tank body 1 can be discharged by opening the second material changing door 17, and then the sodium hydroxide solids can be added in layers using the feed port 13.

[0044] In one possible implementation, see Figures 1 to 4 The tank body 1 is also provided with a shielding net 6 covering the sodium hydroxide solid, and the shielding net 6 is located below the toluene outlet 12, and is used to prevent the sodium hydroxide solid from entering the toluene outlet 12. The shielding net 6 can form a barrier effect on the sodium hydroxide solid from above, and can prevent the sodium hydroxide solid from mixing into the toluene and being discharged through the toluene outlet 12.

[0045] For some examples, see Figures 1 to 4 The outer ring of the shielding net 6 is provided with a plurality of magnetic blocks 61 arranged at intervals, and the magnetic blocks 61 are used to be adsorbed on the inner wall of the tank body 1 to tension the shielding net 6. The magnetic blocks on the outer periphery of the shielding net 6 can effectively attract the inner wall of the tank body 1 to ensure the tensioning effect on the shielding net 6, so that the shielding net 6 can stably shield the sodium hydroxide solid and ensure the purity of toluene.

[0046] The toluene purification neutralization reactor utilizes a filter plate 2 disposed in a tank body 1 to support sodium hydroxide solids. Toluene entering through a toluene inlet 11 at the bottom of the tank body 1 flows through the sodium hydroxide solids from bottom to top. The sodium hydroxide solids react with excess acid in the toluene to effectively remove acidic substances in the toluene. The arrangement of the buffer shell 3 can reduce the impact of toluene on the sodium hydroxide solids, allowing the toluene to enter between the sodium hydroxide solids in an orderly manner, thereby improving the efficiency of the neutralization reaction. The above structure effectively improves the purity of toluene and ensures the normal use of subsequent toluene.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Toluene purification and neutralization reactor, characterized in that, The invention comprises a tank body (1) and a filter plate (2), wherein the tank body (1) is used to contain solid sodium hydroxide, the filter plate (2) is arranged in the tank body (1) and supported below the solid sodium hydroxide, the filter plate (2) is used to filter the salt solution generated after the toluene neutralization reaction, the lower part of the tank body (1) is provided with a toluene inlet (11) located above the filter plate (2), the upper part of the tank body (1) is provided with a toluene outlet (12) located above the sodium hydroxide, the top of the tank body (1) is provided with a feed inlet (13), and the bottom of the tank body (1) is provided with a discharge outlet (14) for discharging the salt solution; The tank body (1) is provided with a buffer shell (3) arranged around the outer periphery below the toluene liquid inlet (11), the buffer shell (3) contains solid sodium hydroxide, and the buffer shell (3) is used to buffer and guide the toluene to flow upward.

2. The toluene purification and neutralization reactor according to claim 1, characterized in that: The buffer shell (3) comprises a horizontally arranged lower bottom plate (31) and a buffer ring plate (32) connected to the outer edge of the lower bottom plate (31), and the upper edge of the buffer ring plate (32) extends upward to a level higher than the toluene inlet (11).

3. Toluene purification and neutralization reactor as claimed in claim 2, characterized in that, The lower bottom plate (31) has an arc-shaped edge, the lower edge of the buffer ring plate (32) is connected to the arc-shaped edge, and the buffer ring plate (32) gradually extends from bottom to top towards a side away from the toluene inlet (11).

4. The toluene purification and neutralization reactor according to claim 1, characterized in that: A filter cloth (4) is stacked above the filter plate (2), and the edge of the filter cloth (4) is arranged between the outer peripheral wall of the filter plate (2) and the inner peripheral wall of the tank body (1).

5. The toluene purification and neutralization reactor according to claim 1, characterized in that: A first ring seat (15) for supporting the filter plate (2) is fixedly connected to the inner wall of the tank body (1), and a through hole is provided in the middle of the first ring seat (15) for passing through the upper and lower parts so as to allow the salt solution to flow downward.

6. The toluene purification and neutralization reactor according to claim 1, characterized in that: A layered filter plate (5) is also provided in the tank body (1). The layered filter plate (5) is located above the buffer shell (3) and is spaced apart from the filter plate (2). The layered filter plate (5) is used to separate sodium hydroxide solids of different particle sizes.

7. The toluene purification and neutralization reactor according to claim 6, characterized in that: A plurality of supporting angle seats (51) are connected to the inner peripheral wall of the tank body (1), a second ring plate (52) is provided on the supporting angle seat (51), and the layered filter plate (5) is arranged above the second ring plate (52).

8. The toluene purification and neutralization reactor according to claim 6, characterized in that: A first material changing door (16) and a second material changing door (17) are hingedly connected to the side of the tank body (1); the first material changing door (16) and the second material changing door (17) are both transparent material components; the lower edge of the first material changing door (16) is flush with the top surface of the filter plate (2); and the lower edge of the second material changing door (17) is flush with the top surface of the layered filter plate (5).

9. The toluene purification and neutralization reactor according to any one of claims 1 to 8, characterized in that: The tank body (1) is further provided with a shielding net (6) covering the sodium hydroxide solid. The shielding net (6) is located below the toluene liquid outlet (12) and is used to prevent the sodium hydroxide solid from entering the toluene liquid outlet (12).

10. The toluene purification and neutralization reactor according to claim 9, characterized in that: The outer ring of the shielding net (6) is provided with a plurality of magnetic blocks (61) arranged at intervals, and the magnetic blocks (61) are used to be adsorbed on the inner wall of the tank body (1) to tighten the shielding net (6).

Images