Deacidification reactor

Abstract

The utility model discloses a deacidification reactor which comprises a tank body, and an ion exchange resin catalyst is filled in the tank body through a supporting structure. According to the deacidification reactor provided by the utility model, the tank body is filled with the ion exchange resin catalyst through the supporting structure, so that mother liquor can be subjected to neutralization reaction with the ion exchange resin catalyst when passing through the tank body, acidic substances in the mother liquor can be removed, and the influence of the acidic substances in the mother liquor on the quality of a product is avoided as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of bisphenol A production, in particular to an acid removal reactor. Background Art

[0002] Bisphenol A is an important chemical product, which is generally produced by the reaction of acetone and phenol. This reaction is a phenolic condensation reaction and is widely used in the fields of synthetic resins and plastics. The production process of bisphenol A usually includes the steps of synthesis, separation, refining and purification.

[0003] For example, the patent document with authorization announcement number CN109476571B, authorization announcement date June 19, 2020, and titled "Preparation of Bisphenol A" includes: reacting phenol and acetone in the presence of an acidic catalyst to form a reaction product comprising an initial concentration of bisphenol A and an initial concentration of impurities; diluting the reaction product with phenol, water and / or acetone to reduce the impurity concentration to 50 weight % or less of the initial concentration of the impurities, and adding bisphenol A to increase its concentration in the reaction product; crystallizing a bisphenol A / phenol adduct from the reaction product to obtain a crystalline bisphenol A product.

[0004] The mother liquor in the bisphenol A production process contains a small amount of acidic substances. These acidic substances are generally the sulfonic acid group acidic substances lost from the main reactor catalyst and the sulfuric acid added during the neutralization process of the dephenolization unit. The circulation of these acidic substances in the production system will affect the refining and purification of bisphenol A. Utility Model Content

[0005] The utility model aims to provide an acid removal reactor to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A deacidification reactor comprises a tank body, in which an ion exchange resin catalyst is filled via a supporting structure.

[0008] In the above-mentioned acid removal reactor, the supporting structure is a Johnson net.

[0009] In the above-mentioned acid removal reactor, the supporting structure is porcelain balls and sand.

[0010] In the above-mentioned acid removal reactor, the diameters of the porcelain balls include 3.2 mm, 6.4 mm and 13 mm.

[0011] In the above-mentioned acid removal reactor, the tank body is constructed with an inlet pipe and an outlet pipe.

[0012] In the above-mentioned acid removal reactor, a plurality of inlet pipes are provided.

[0013] In the above-mentioned acid removal reactor, a plurality of small holes are provided on the inlet pipe.

[0014] In the above-mentioned acid removal reactor, a collecting pipe is arranged at the bottom of the tank body.

[0015] In the above-mentioned acid removal reactor, the outlet pipe is fixedly connected to one side of the collecting pipe.

[0016] In the above-mentioned acid removal reactor, a sewage pipe is connected to the bottom of the collecting pipe.

[0017] In the above technical scheme, the utility model provides an acid removal reactor, in which an ion exchange resin catalyst is loaded in a tank body through a supporting structure, so that the mother liquor can undergo a neutralization reaction with the ion exchange resin catalyst when passing through the tank body, thereby removing the acidic substances in the mother liquor and minimizing the impact of the acidic substances in the mother liquor on the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 The overall structural diagram provided for the embodiment of the utility model;

[0020] Figure 2 A schematic diagram of a support structure provided for another embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the inlet pipe structure provided by an embodiment of the utility model;

[0022] Figure 4 A schematic diagram of the inlet pipe structure provided by another embodiment of the utility model;

[0023] Figure 5 A cross-sectional view of an inlet pipe provided in another embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 1. Tank body; 2. Ion exchange resin catalyst; 3. Johnson net; 4. Ceramic ball; 5. Sand and gravel; 6. Inlet pipe; 7. Outlet pipe; 8. Small hole; 9. Collecting pipe; 10. Drain pipe; 11. Extension; 61. Fixed section; 62. Movable section. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] Reference Figure 1-5 The embodiment of the utility model provides an acid removal reactor, comprising a tank body 1, wherein the tank body 1 is filled with an ion exchange resin catalyst 2 via a supporting structure.

[0028] Specifically, the production system of bisphenol A is generally a circulation pipeline, which includes a distillation unit and a reaction unit. The distillation unit is used to distill and dehydrate the mother liquor and pentane, and the reaction unit is used for the mother liquor to produce bisphenol A. In the mother liquor of the bisphenol A production process, there is a small amount of sulfonic acid group acidic substances lost from the catalyst of the main reactor and sulfuric acid added in the neutralization process of the dephenolization unit. These acidic substances will accumulate in the system. For the refining and purification of bisphenol A, these acidic substances will cause bisphenol A to be micro-decomposed, which will cause the product quality of the refining unit to be degraded and deteriorated. The innovation of the embodiment of the utility model is that a tank body 1 is arranged between the distillation unit and the reaction unit of the bisphenol A production system, and the tank body 1 is connected with the distillation unit and the reaction unit through a pipeline, so that the mother liquor discharged from the distillation unit passes through the tank body 1 and then enters the reaction unit. When the mother liquor passes through the tank body 1, the ion exchange resin catalyst 2 loaded in the tank body 1 can be neutralized with the acidic substances in the mother liquor, thereby removing the acidic substances in the mother liquor and avoiding the acidic substances in the mother liquor from affecting the quality of the product as much as possible.

[0029] The neutralization reaction occurring in tank 1 is as follows:

[0030] X―N:RnHm+X'―SO3:H→X―N:RnHmH SO3―X'

[0031] X, R and X' respectively represent the structure of the anion exchange resin, the alkyl group and the structure of the acidic substance lost from the cation exchange resin; wherein the amount of the ion exchange resin catalyst 2 is determined according to the processing capacity of the tank 1.

[0032] An acid removal reactor provided by an embodiment of the utility model is equipped with an ion exchange resin catalyst 2 loaded in a tank body 1 through a supporting structure, so that the mother liquor can undergo a neutralization reaction with the ion exchange resin catalyst 2 when passing through the tank body 1, thereby removing the acidic substances in the mother liquor and minimizing the impact of the acidic substances in the mother liquor on the quality of the product.

[0033] In another embodiment provided by the utility model, further, the supporting structure is a Johnson net 3. Specifically, the Johnson net 3 is similar to a filter structure, which has a smaller pore size and a higher porosity, and at least two Johnson nets 3 are detachably connected to the inner wall of the tank body 1 to support and restrict the ion exchange resin catalyst 2, so that the ion exchange resin catalyst 2 is loaded into the tank body 1, so that the mother liquid can flow in the tank body 1 and react with the ion exchange resin catalyst 2, and the ion exchange resin catalyst 2 can be restricted by the Johnson net 3 to avoid the ion exchange resin catalyst 2 from moving in the tank body 1 as much as possible.

[0034] In another embodiment provided by the utility model, the supporting structure is a ceramic ball 4 and a sandstone 5. Specifically, the ceramic ball 4 and the sandstone 5 can form a structure similar to a filter screen, wherein the ceramic ball 4 can be selected in different specifications and sizes, such as ceramic balls 4 with diameters of 3.2 mm, 6.4 mm and 13 mm arranged in sequence, and the ceramic balls 4 and the sandstone 5 of various specifications and sizes can better support the ion exchange resin catalyst 2.

[0035] Furthermore, the tank body 1 is constructed with an inlet pipe 6 and an outlet pipe 7. Specifically, the upper and lower ends of the tank body 1 are respectively constructed with an inlet pipe 6 and an outlet pipe 7, the inlet pipe 6 is connected to the distillation unit to guide the mother liquor into the tank body 1, and the outlet pipe 7 is connected to the reaction unit to guide the mother liquor after the neutralization reaction to the reaction unit. When the support structure uses the Johnson net 3, the inlet pipe 6 is arranged above the tank body 1, and the outlet pipe 7 is arranged below the tank body 1, so that the mother liquor enters from the top of the tank body 1 and flows out from the bottom of the tank body 1; when the support structure uses porcelain balls 4 and sand and gravel 5, the inlet pipe 6 is arranged below the tank body 1, and the outlet pipe 7 is arranged above the tank body 1, so that the mother liquor enters from the bottom of the tank body 1 and flows out from the top of the tank body 1, so that the flow direction of the mother liquor can be selected according to the support structure to adapt to different working conditions.

[0036] Preferably, there are multiple inlet pipes 6. Specifically, the same end of the multiple inlet pipes 6 extends into the tank body 1 to simultaneously input the mother liquid into the tank body 1, and the multiple inlet pipes 6 are evenly arranged above or below the tank body 1. The multiple inlet pipes 6 face different positions, so that the mother liquid can be evenly diffused around after entering the tank body 1, and then evenly contact the ion exchange resin catalyst 2 to perform a neutralization reaction.

[0037] Preferably, the inlet pipe 6 is provided with a plurality of small holes 8. Specifically, the inlet pipe 6 is provided with a plurality of small holes 8 on the side wall extending to one end of the tank body 1, so that the mother liquid can further diffuse to the surroundings when entering the tank body 1 through the inlet pipe 6, thereby improving the diffusion degree of the mother liquid, and further improving the reaction efficiency of the mother liquid and the ion exchange resin catalyst 2.

[0038] Furthermore, a collecting pipe 9 is provided at the bottom of the tank body 1. The outlet pipe 7 is fixedly connected to one side of the collecting pipe 9. Specifically, in this embodiment, the collecting pipe 9 is fixedly connected to the bottom of the tank body 1, and the outlet pipe 7 is fixed to the collecting pipe 9 to achieve the connection between the outlet pipe 7 and the tank body 1; when the supporting structure uses the Johnson net 3, the mother liquor flows from the upper part of the tank body 1 to the lower part of the tank body 1, and the collecting pipe 9 is fixedly connected to the bottom of the tank body 1. The mother liquor after the neutralization reaction in the tank body 1 can be collected together through the collecting pipe 9, so that it is convenient to discharge it centrally through the outlet pipe 7.

[0039] Preferably, a drain pipe 10 is connected to the bottom of the collecting pipe 9. Specifically, the height of the drain pipe 10 is lower than the height of the outlet pipe 7; some impurities may be generated after the mother liquid in the tank body 1 reacts with the ion exchange resin catalyst 2 for neutralization, and these impurities will settle to the bottom of the collecting pipe 9 as the mother liquid flows. At this time, the drain pipe 10 connected to the bottom of the collecting pipe 9 can discharge the impurities or dirt when needed, so as to keep the inside of the tank body 1 clean.

[0040] In another embodiment provided by the utility model, the inlet pipe 6 is divided into a fixed section 61 fixed on the tank body 1 and a movable section 62 rotatably connected to the fixed section 61. The fixed section 61 and the movable section 62 are both tubular structures and are rotatably connected. The movable section 62 is located in the tank body 1 and the outer wall of the movable section 62 is configured with a plurality of extensions 11. The extensions 11 are cylindrical and the small holes 8 are configured along the central axis of the extensions 11, that is, the mother liquid flows out through the small holes 8 configured in the extensions 11 after passing through the fixed section 61 and the movable section 62. When the mother liquid flows into the interior of the tank body 1 through the fixed section 61, the movable section 62 and the small holes 8, a certain reaction force will be generated when the mother liquid flows out of the small holes 8. This reaction force will force the movable section 62 to rotate on the fixed section 61 (such as Figure 5 As shown, the movable section 62 rotates clockwise when the mother liquid flows out from the small holes); the advantages of such a configuration are that, firstly, the mother liquid flows out from the multiple small holes 8, which can improve the diffusion degree of the mother liquid, thereby improving the reaction efficiency of the mother liquid and the ion exchange resin catalyst 2; secondly, when the movable section 62 rotates, the mother liquid in the tank body 1 can be stirred through the extension portion 11, so that the mother liquid in the tank body 1 is in a turbulent state, further improving the reaction efficiency of the mother liquid and the ion exchange resin catalyst 2.

[0041] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A deacidification reactor, comprising a tank body, characterized in that: The tank body is filled with an ion exchange resin catalyst through a supporting structure. The tank body is constructed with an inlet pipe and an outlet pipe. The inlet pipe extends to a side wall at one end of the tank body and is provided with a plurality of small holes so that the mother liquid can diffuse to the surroundings when entering the tank body through the inlet pipe.

2. A deacidification reactor according to claim 1, characterized in that: The support structure is a Johnson net.

3. A deacidification reactor according to claim 1, characterized in that: The supporting structure is porcelain balls and sand.

4. A deacidification reactor according to claim 3, characterized in that: The diameters of the porcelain balls include 3.2 mm, 6.4 mm and 13 mm.

5. The acid removal reactor according to claim 1, characterized in that: The inlet pipe is provided in plurality.

6. The acid removal reactor according to claim 1, characterized in that: A collecting pipe is arranged at the bottom of the tank body.

7. The acid removal reactor according to claim 6, characterized in that: The outlet pipe is fixedly connected to one side of the collecting pipe.

8. The acid removal reactor according to claim 6, characterized in that: The bottom of the collecting pipe is connected with a sewage pipe.

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