Resin column simultaneously containing acid-base resin

Abstract

According to the improved resin column, acidic resin and alkaline resin are ingeniously integrated in the same resin column for a synergistic effect for the first time, a controllable heat preservation layer is further arranged on the outer layer of the resin, so that different temperatures can be set according to different resin sections, the treatment range is widened, and through the complementary effect of the acidic resin and the alkaline resin, the treatment efficiency is improved. The separation efficiency is obviously enhanced; in addition, by arranging a plurality of acidic resin filler layers and alkaline resin filler layers, the loss of raw materials is effectively reduced, and the overall resource utilization rate is improved. Meanwhile, due to the simplification of the structure of the resin column, the equipment cost and the occupied area are also reduced; and the resin column or additional equipment does not need to be replaced in the elution process due to the design of the additional regenerated liquid inlet, so that the operation process is simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to a resin column containing acid and base resin simultaneously and belongs to the technical field of chemical separation. BACKGROUND

[0002] Resin column separation technology is a method that uses resin as a stationary phase to separate different components in a mixture through adsorption and desorption processes; based on the difference in adsorption capacity of different substances and resin, when the solution passes through the resin column, the ion exchange resin with exchangeable ion groups on the surface exchanges ions with the ions in the solution, thereby realizing the adsorption and separation of target ions.

[0003] Traditional resin column separation technology usually relies on a single type of resin (such as acidic or basic resin) to adsorb and separate target components. Although this single resin usage method can achieve a certain degree of separation effect under certain conditions, its limitations are also quite obvious. Due to the large difference in chemical properties and polarity of different target components, a single resin can only exhibit good adsorption performance for a certain type of component, while it may not be able to effectively adsorb or separate components with other properties. This limits the processing range and separation efficiency to some extent, making it difficult to simultaneously process components with different properties. At the same time, the adsorption capacity and selectivity of a single resin are relatively limited, resulting in the need for multiple repeated operations during the separation process, thereby reducing the separation efficiency and increasing the separation cost and time. In addition, the traditional method has high requirements for operating conditions, and improper operation may result in poor separation effect or safety accidents.

[0004] In order to achieve more extensive material separation, multiple resin columns are often used in series or parallel operation, for example, in the separation of Sr, Nd and U isotopes in geological samples, multiple resin columns are usually used in series to achieve efficient separation; this not only increases the equipment cost and floor area, each resin column needs independent equipment support, including column, connecting pipeline, pump and control system, etc., which not only requires additional equipment investment, but also occupies more space; also makes the process complex, increases the operation difficulty, for example, in series operation, the connection order and operating conditions between different resin columns need to be accurately controlled, otherwise the recovery rate of target components may be reduced. In addition, the traditional resin column often needs to replace the resin column when eluting the target component, which not only increases the operation steps, but also may cause loss of the sample during transfer, and may also cause harm such as allergy and irritation caused by direct contact with the resin column during the process of replacing the resin column; and the use of additional elution equipment will further increase the operation difficulty and cost.

[0005] Therefore, in the actual application process, the equipment cost, floor area and operation complexity of the resin column are still challenges that need to be solved. The utility model discloses a resin column containing acid and base resin simultaneously, which specifically comprises an acid resin filler layer, a basic resin filler layer, a blocking layer, a basic resin regeneration liquid feeding port, a controllable heat preservation layer, a raw material / resin regeneration liquid feeding port and a raw material / resin regeneration liquid discharging port.

[0006] To solve the above problems, the present application provides a resin column containing acid and base resin simultaneously, which specifically comprises an acid resin filler layer, a basic resin filler layer, a blocking layer, a basic resin regeneration liquid feeding port, a controllable heat preservation layer, a raw material / resin regeneration liquid feeding port and a raw material / resin regeneration liquid discharging port.

[0007] The resin column comprises at least one acid resin filler layer and one basic resin filler layer in the vertical direction, and a blocking layer for separating the two layers, and each filler layer is separated by the blocking layer. The outer side of each acid resin filler layer and basic resin filler layer is provided with a controllable heat preservation layer. The top and bottom of the resin column are respectively provided with a raw material / resin regeneration liquid feeding port and a raw material / resin regeneration liquid discharging port.

[0008] In one embodiment, the acid resin filler layer and the basic resin filler layer are integrated in one resin column in the vertical direction, which reduces the cost of equipment and the floor area.

[0009] In one embodiment, when the acid resin filler layer and the basic resin filler layer are provided with multiple layers, the acid resin filler layer and the basic resin filler layer are arranged in a grouped manner.

[0010] In one embodiment, when the acid resin filler layer and the basic resin filler layer are arranged in a grouped manner, the outer side of the uppermost layer of a group of resin filler layers at the lower side is provided with a corresponding basic resin regeneration liquid feeding port.

[0011] In one embodiment, the blocking layer is made of one of a sand core filter plate, polytetrafluoroethylene, porous ceramic material or inorganic ceramic membrane, which avoids the direct contact between the acid resin and the basic resin to cause damage to the structure of the resin column, and further causes the decrease of the adsorption performance of the resin.

[0012] In one embodiment, according to the actual production situation, a plurality of acid resin filler layers and basic resin filler layers are provided.

[0013] In one embodiment, each controllable heat preservation layer is respectively provided with an opening and an outlet, so as to introduce a heat source of different temperatures to adjust the temperature of different controllable heat preservation layers.

[0014] In one embodiment, the controllable heat preservation layer is made of one of stainless steel, carbon steel plastic-lined material or organic glass.

[0015] In one embodiment, the controllable heat preservation layer realizes the gradient distribution of the temperature in the resin column by introducing hot water or water vapor.

[0016] In one embodiment, the temperature distribution of the controllable heat preservation layer is gradient distribution from top to bottom.

[0017] In one embodiment, the temperature gradient range of the resin column is 25°C-75°C;

[0018] Advantages of this utility model:

[0019] This invention proposes a resin column that simultaneously contains acid and alkali resins. For the first time, acidic and alkali resins are ingeniously integrated into the same resin column. Through grouping or spacing, the two resins are filled in the acidic and alkali resin packing layers, allowing them to work synergistically. A controllable heat insulation layer is also provided on the outer layer of the resin column, enabling different temperatures to be set for different resin sections. This design not only broadens the processing range, enabling the handling of more types of chemical substances, but also significantly enhances separation efficiency through the complementary effect of the acid and alkali resins. Furthermore, the additional alkali resin regeneration inlet in the middle section of the equipment eliminates the need to replace the resin column or additional equipment during the elution process, simplifying the operation. The lower resin can be eluted / backflushed separately, or the entire resin column can be eluted / backflushed through the upper raw material / resin regeneration inlet or the lower raw material / resin regeneration outlet. This allows for precise control of the acid-alkali resin ratio while achieving highly efficient elution. This invention effectively reduces raw material loss and improves overall resource utilization. Simultaneously, the simplified resin column structure reduces equipment cost and floor space. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a resin column with grouped acid and alkali resin filler layers provided in Embodiment 1 of the present invention;

[0021] The components include: 1. acidic resin filler layer; 2. alkaline resin filler layer; 3. blocking layer; 4. alkaline resin regenerated liquid inlet; 5. controllable insulation layer; 6. raw material / resin regenerated liquid inlet; and 7. raw material / resin regenerated liquid outlet. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings.

[0023] Example 1

[0024] This embodiment provides a resin column containing both acid and alkali resins, which is used to adsorb a small amount of acrylonitrile in an acetonitrile solution. The resin column specifically includes an acidic resin filler layer 1, an alkaline resin filler layer 2, a blocking layer 3, a controllable heat insulation layer 5, a raw material / resin regenerated liquid inlet 6, and a raw material / resin regenerated liquid outlet 7.

[0025] like Figure 1As shown, the embodiment is described by taking the example of containing three layers of acidic resin filler layer 1 and three layers of basic resin filler layer 2, wherein the acidic resin filler layer 1 and the basic resin filler layer 2 are arranged in groups, i.e. the three layers of acidic resin filler layer 1 form a group and the three layers of basic resin filler layer 2 form a group, and the two groups of resin filler layers are arranged in an up-down manner; a blocking layer 3 is arranged in the middle of each layer of filler layer, and a controllable heat preservation layer 5 is arranged on the outer side of each filler layer; a raw material / resin regeneration liquid inlet 6 and a raw material / resin regeneration liquid outlet 7 are arranged at the top and bottom of the resin column respectively; in the three layers of basic resin filler layer 2 of the embodiment, the outer top of the uppermost layer of filler layer is further provided with a basic resin regeneration liquid inlet 4.

[0026] The controllable heat preservation layer 5 is arranged on the outer side of each filler layer, and the temperature of different filler layers is realized by adjusting the temperature of the heat source entering the controllable heat preservation layer 5, so as to realize the gradient distribution of the temperature of the resin column from top to bottom.

[0027] The acidic resin filled in the upper three layers of filler layers is 732 strong acid cation exchange resin, and the basic resin filled in the lower three layers of filler layers is LXC-6307 resin; and the volume ratio of the two resins is 1:1.

[0028] The temperature gradient of the controllable heat preservation layer 5 is set as follows: in the upper three layers of acidic resin filler layer 1, the temperature of the first layer is set to 70-75℃, the temperature of the second layer is set to 55-60℃, and the temperature of the third layer is set to 45-50℃; in the lower three layers of basic resin filler layer 2, the temperature of the first layer is set to 55-60℃, the temperature of the second layer is set to 45-50℃, and the temperature of the third layer is set to 35-40℃.

[0029] The acetonitrile solution containing a small amount of acrylonitrile is introduced into the resin column through the raw material / resin regeneration liquid inlet 6, and the solution first passes through the upper three layers of acidic resin filler layer 1. The 732 strong acid cation exchange resin filled in the acidic resin filler layer 1 can provide an acidic environment, and acrylonitrile will hydrolyze into acrylamide under acidic conditions, and acrylamide will further hydrolyze into acrylic acid. After the solution passes through the adsorption of the 732 strong acid cation exchange resin, it passes through the lower three layers of basic resin filler layer 2. The LXC-6307 resin filled in the basic resin filler layer 2 provides an alkaline environment, and acrylic acid undergoes a neutralization reaction to generate acrylic acid salt.

[0030] The temperature of the controllable heat preservation layer 5 of the upper three layers gradually decreases from 75℃ to 45℃ from top to bottom; the temperature of the controllable heat preservation layer 5 of the lower three layers gradually decreases from 60℃ to 35℃ from top to bottom; the temperature gradient setting of the controllable heat preservation layer 5 can ensure good adsorption efficiency while avoiding the decrease of the adsorption capacity of the resin caused by high temperature.

[0031] The elution conditions are that first, saturated brine is fed from the raw material / resin regeneration liquid feeding port 6, then a 5% by mass HCl solution is fed to flush the acid-base resin from the raw material / resin regeneration liquid feeding port 6, a 5% by mass NaOH solution is fed from the basic resin regeneration liquid feeding port 4 to flush the basic resin, and finally, deionized water is added from the raw material / resin regeneration liquid feeding port 6 to flush the acid resin and the basic resin.

[0032] The saturated brine can preliminarily remove the impurities adsorbed on the resin, and at the same time, the high ionic strength of the saturated brine reduces the adsorption capacity of the resin for the acrylic acid salt, so that the acrylic acid salt is more easily eluted; the HCl solution can neutralize the basic groups on the resin, and at the same time, elute the acrylonitrile and the acrylic acid salt adsorbed on the resin; the NaOH solution is used to neutralize the acidic groups in the resin, and at the same time, further elute the acrylic acid and the acrylic acid salt; finally, the deionized water is added to flush the acid resin and the basic resin, remove the residual acid-base solution in the resin, and ensure that the resin returns to the initial state.

[0033] The working principle of the utility model is as follows:

[0034] First, the resin and the ratio of the acid resin and the basic resin are selected according to the substances to be separated, the prepared acid resin and the basic resin are respectively placed in the acid resin packing layer 1 and the basic resin packing layer 2, the temperature gradient of the resin column is adjusted by feeding hot water or water vapor into the controllable heat preservation layer 5, the mixture to be separated is fed from the raw material / resin regeneration liquid feeding port 6 at the top of the resin column, the mixture passes through the acid resin packing layer 1 and the basic resin packing layer 2 in turn, and finally flows out from the raw material / resin regeneration liquid discharge port 7 at the bottom of the resin column, so that the precise adsorption and separation of a certain substance are realized.

[0035] After the adsorption is completed, the regeneration liquid of the corresponding resin is fed from the raw material / resin regeneration liquid feeding port 6 at the top of the resin column and the basic resin regeneration liquid feeding port 4 arranged on the packing layer, so that the regeneration of the corresponding resin is realized.

[0036] Although the utility model has disclosed as above with preferred embodiments, it is not used to limit the utility model, anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model should be limited by the claims.

Claims

1. A resin column containing both an acid-base resin simultaneously, characterized in that, The resin column comprises at least one layer of acidic resin filler layer (1) and one layer of basic resin filler layer (2), and a blocking layer (3) for separating the two; the outer side of each layer of acidic resin filler layer (1) and basic resin filler layer (2) is provided with a corresponding controllable insulation layer (5); the top and bottom of the resin column are respectively provided with a raw material / resin regeneration liquid inlet (6) and a raw material / resin regeneration liquid outlet (7).

2. The resin column containing both an acid-base resin according to claim 1, characterized by, When the acidic resin filler layer (1) and / or the basic resin filler layer (2) is provided with multiple layers, the two are arranged in groups.

3. The resin column containing both an acid-base resin according to claim 1, characterized by, The temperature of the controllable insulation layer (5) is distributed in a gradient from top to bottom.

4. The resin column containing both an acid-base resin according to claim 2, characterized by, When the acidic resin filler layer (1) and the basic resin filler layer (2) are arranged in groups, the outer side of the uppermost layer of the resin filler layer in the lower group is provided with a corresponding basic resin regeneration liquid inlet (4).

5. The resin column containing both an acid-base resin according to claim 3, characterized by, Each controllable insulation layer (5) is respectively provided with an inlet and an outlet for introducing a heat source of different temperature to adjust the temperature of the different controllable insulation layers (5).

6. The resin column containing both an acid-base resin according to claim 5, characterized in that, The heat source of the controllable insulation layer (5) is hot water or water vapor.

7. The resin column of claim 3, wherein The temperature gradient of the controllable insulation layer (5) ranges from 25℃ to 75℃.

8. The resin column of claim 1, wherein, The blocking layer (3) is made of one of sand core filter plate, polytetrafluoroethylene, porous ceramic material or inorganic ceramic membrane.

9. The resin column of claim 1, wherein, The controllable insulation layer (5) is made of one of stainless steel, carbon steel plastic-lined material or organic glass.

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