Device and method for extracting trimethylolpropane through calcium method

Abstract

The invention relates to the field of calcium method trimethylolpropane extraction, and discloses a calcium method trimethylolpropane extraction device and method.The calcium method trimethylolpropane extraction device comprises a solvent tank, a stock solution tank, a physical shearing device, an extraction tower, an extraction phase tank, a raffinate phase tank, a solvent pump, a solvent feeding pump and a stock solution pump; the physical shearing device is connected with the solvent feeding pump, the stock solution pump is connected with the extraction tower, the extraction tower is connected with the extraction phase tank and the raffinate phase tank, and the solvent feeding pump and the stock solution pump are respectively connected with the solvent tank and the stock solution tank. The method has the following advantages and effects that the solute (trimethylolpropane) can make full contact with the solvent, the mass transfer effect is greatly improved, more target solutes can be transferred into the solvent from a stock solution, and therefore the extraction efficiency is effectively improved, all links of the whole process are matched and collaboratively optimized, and the extraction efficiency is improved. And finally, the efficiency of the original tower-type extraction process is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of calcium-based trimethylolpropane extraction, and in particular to a calcium-based trimethylolpropane extraction device and method. Background Art

[0002] Trimethylolpropane (TMP) is an important organic chemical raw material. Extraction and separation of TMP from concentrated liquid is a chemical separation technology, the purpose of which is to extract TMP from a concentrated mixed liquid containing TMP to obtain a TMP product with higher purity. The concentrated liquid is a liquid that has undergone certain pretreatments, such as evaporation and concentration, to increase the relative content of TMP in the solution.

[0003] Extraction separation is mainly based on the difference in solubility of TMP and other components in the concentrate in different solvents. Choose a suitable extraction solvent in which the solubility of TMP is much greater than that in the concentrate, while the solubility of other components in the concentrate is relatively small. When the extraction solvent and the concentrate are fully mixed, TMP will transfer from the concentrate to the extraction solvent.

[0004] Packed tower extraction is used in the calcium-based trimethylolpropane production process. Most manufacturers use countercurrent extraction to achieve mass transfer and separation of the target solute between different liquid phases. However, the use of countercurrent extraction in actual production will lead to insufficient contact area between the material and the solvent, greatly affecting the extraction efficiency.

[0005] Therefore, it is necessary to design a calcium-based trimethylolpropane extraction device and method to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a calcium-based trimethylolpropane extraction device and method to solve the problem that the countercurrent extraction method described above will result in insufficient contact area between the material and the solvent, greatly affecting the extraction efficiency.

[0007] The above technical purpose of the present invention is achieved through the following technical scheme: a calcium process trimethylolpropane extraction device, comprising:

[0008] Solvent tank, stock liquid tank, physical shearer, extraction tower, extraction phase tank, raffinate phase tank, solvent pump, solvent feed pump and stock liquid pump;

[0009] The physical shearer is connected to the solvent feed pump, the stock liquid pump is connected to the extraction tower, the extraction tower is connected to the extraction phase tank and the raffinate phase tank, and the solvent feed pump and the stock liquid pump are connected to the solvent tank and the stock liquid tank respectively.

[0010] The present invention is further configured as follows: the solvent pump is connected to the solvent tank.

[0011] The present invention is further configured as follows: a pressurizing device is installed on the physical shearing device.

[0012] By adopting the above technical solution, it is convenient to pump the mixed material inside the physical shearer to the extraction tower.

[0013] The present invention is further configured as follows: the material of the extraction tower is any one of metal, glass or polymer material.

[0014] A method for extracting trimethylolpropane by calcium process, according to the device for extracting trimethylolpropane by calcium process described in any one of the above, comprising the following steps:

[0015] Step S1, preheating the solvent tank and the stock solution tank;

[0016] Step S2, after the temperatures in the solvent tank and the stock solution tank are stabilized, feeding materials into the physical shearer through the solvent feed pump and the stock solution pump respectively;

[0017] Step S3, the fully mixed material is taken out from the pressurizing device on the physical shearer and enters the extraction tower;

[0018] Step S4, directly feeding the mixed material fully mixed by the physical shearer into the middle of the extraction tower, and adjusting the temperature of the extraction tower;

[0019] Step S5, extracting the extract phase from the top of the extraction tower and extracting the raffinate phase from the bottom of the extraction tower, and storing them in an extract phase tank and a raffinate phase tank, respectively.

[0020] The present invention is further configured as follows: the temperature of the solvent tank is controlled within the range of 60-75°C, and the temperature of the stock solution tank is controlled within the range of 75-95°C.

[0021] The present invention is further configured as follows: the feed ratio of the solvent in the solvent tank to the stock solution in the stock solution tank is (2-2.5):1.

[0022] The present invention is further configured as follows: the temperature of the extraction tower is controlled within the range of 60-75°C.

[0023] The beneficial effects of the present invention are:

[0024] 1. The present invention adopts a specific feeding method and a two-step shearing and mixing operation through a physical shearer. First, part of the solvent is mixed with the stock solution and enters the upper part of the physical shearer for internal shearing, thereby increasing the contact area between the material molecules to complete the first step of mass transfer. Then, the mixed sheared material is sheared and mixed with the middle solvent for a second time to complete the second step of mass transfer. Compared with the traditional countercurrent extraction method, this multi-stage shearing and mixing method can allow the solute (trimethylolpropane) to fully contact with the solvent, greatly improve the mass transfer effect, and enable more target solutes to be transferred from the stock solution to the solvent, thereby effectively improving the extraction efficiency;

[0025] 2. When the device of the present invention is in operation, the solvent tank and the stock liquid tank are first preheated and the temperature is controlled in a suitable temperature range so that the material is in a state that is more conducive to mixing and mass transfer before entering the physical shearer. At the same time, the feed ratio of solvent to stock liquid is strictly controlled to ensure that a sufficient and reasonable amount of solvent is involved in the extraction process. The material that has been fully mixed by the physical shearer is extracted through a pressurized device and enters the middle part of the extraction tower. In the extraction tower, the separation is further completed by adjusting the appropriate temperature and utilizing the gaps in the filler. All links in the entire process cooperate with each other and are optimized synergistically, which ultimately effectively improves the efficiency of the original tower extraction process, increases the extraction amount of the target product in the production process, increases product output, and helps to improve the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0027] Figure 1 The present invention is a schematic structural diagram of a calcium-based trimethylolpropane extraction device.

[0028] In the figure, 1. solvent tank; 2. raw liquid tank; 3. physical shearer; 4. extraction tower; 5. extraction phase tank; 6. raffinate phase tank; 7. solvent pump; 8. solvent feed pump; 9. raw liquid pump. DETAILED DESCRIPTION

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] See also Figure 1 The present invention provides a calcium process trimethylolpropane extraction device, comprising:

[0033] Solvent tank 1, stock solution tank 2, physical shearer 3, extraction tower 4, extraction phase tank 5, raffinate phase tank 6, solvent pump 7, solvent feed pump 8 and stock solution pump 9;

[0034] The physical shearer 3 is connected to the solvent feed pump 8, the stock liquid pump 9 is connected to the extraction tower 4, the extraction tower 4 is connected to the extraction phase tank 5 and the raffinate phase tank 6, the solvent feed pump 8 and the stock liquid pump 9 are connected to the solvent tank 1 and the stock liquid tank 2 respectively.

[0035] Specifically, the solvent pump 7 is connected to the solvent tank 1, a pressurizing device is installed on the physical shearer 3, and the material of the extraction tower 4 is any one of metal, glass or polymer material.

[0036] A method for extracting trimethylolpropane by calcium process, according to any of the above-mentioned devices for extracting trimethylolpropane by calcium process, comprising the following steps:

[0037] Step S1, preheating the solvent tank 1 and the stock solution tank 2;

[0038] Step S2, after the temperatures in the solvent tank 1 and the stock solution tank 2 are stabilized, feed materials into the physical shearing device 3 through the solvent feed pump 8 and the stock solution pump 9 respectively;

[0039] Step S3, the fully mixed material is taken out from the pressurizing device on the physical shearer 3 and enters the extraction tower 4;

[0040] Step S4, directly feeding the mixed material fully mixed by the physical shearer 3 into the middle of the extraction tower 4, and adjusting the temperature of the extraction tower 4;

[0041] Step S5, extracting the extract phase from the top of the extraction tower 4 and extracting the raffinate phase from the bottom of the extraction tower 4, and storing them in the extract phase tank 5 and the raffinate phase tank 6 respectively.

[0042] Specifically, the temperature of the solvent tank 1 is controlled at 60°C, the temperature of the stock solution tank 2 is controlled at 75°C, the feed ratio of the solvent in the solvent tank 1 to the stock solution in the stock solution tank 2 is 2:1, and the temperature of the extraction tower 4 is controlled at 60°C.

[0043] Example 2

[0044] See also Figure 1 The present invention provides a calcium process trimethylolpropane extraction device, comprising:

[0045] Solvent tank 1, stock solution tank 2, physical shearer 3, extraction tower 4, extraction phase tank 5, raffinate phase tank 6, solvent pump 7, solvent feed pump 8 and stock solution pump 9;

[0046] The physical shearer 3 is connected to the solvent feed pump 8, the stock liquid pump 9 is connected to the extraction tower 4, the extraction tower 4 is connected to the extraction phase tank 5 and the raffinate phase tank 6, the solvent feed pump 8 and the stock liquid pump 9 are connected to the solvent tank 1 and the stock liquid tank 2 respectively.

[0047] Specifically, the solvent pump 7 is connected to the solvent tank 1, a pressurizing device is installed on the physical shearer 3, and the material of the extraction tower 4 is any one of metal, glass or polymer material.

[0048] A method for extracting trimethylolpropane by calcium process, according to any of the above-mentioned devices for extracting trimethylolpropane by calcium process, comprising the following steps:

[0049] Step S1, preheating the solvent tank 1 and the stock solution tank 2;

[0050] Step S2, after the temperatures in the solvent tank 1 and the stock solution tank 2 are stabilized, feed materials into the physical shearing device 3 through the solvent feed pump 8 and the stock solution pump 9 respectively;

[0051] Step S3, the fully mixed material is taken out from the pressurizing device on the physical shearer 3 and enters the extraction tower 4;

[0052] Step S4, directly feeding the mixed material fully mixed by the physical shearer 3 into the middle of the extraction tower 4, and adjusting the temperature of the extraction tower 4;

[0053] Step S5, extracting the extract phase from the top of the extraction tower 4 and extracting the raffinate phase from the bottom of the extraction tower 4, and storing them in the extract phase tank 5 and the raffinate phase tank 6 respectively.

[0054] Specifically, the temperature of the solvent tank 1 is controlled at 70°C, the temperature of the stock solution tank is controlled at 85°C, the feed ratio of the solvent in the solvent tank 1 to the stock solution in the stock solution tank 2 is 2.3, and the temperature of the extraction tower 4 is controlled at 65°C.

[0055] Example 3

[0056] See also Figure 1The present invention provides a calcium process trimethylolpropane extraction device, comprising:

[0057] Solvent tank 1, stock solution tank 2, physical shearer 3, extraction tower 4, extraction phase tank 5, raffinate phase tank 6, solvent pump 7, solvent feed pump 8 and stock solution pump 9;

[0058] The physical shearer 3 is connected to the solvent feed pump 8, the stock liquid pump 9 is connected to the extraction tower 4, the extraction tower 4 is connected to the extraction phase tank 5 and the raffinate phase tank 6, the solvent feed pump 8 and the stock liquid pump 9 are connected to the solvent tank 1 and the stock liquid tank 2 respectively.

[0059] Specifically, the solvent pump 7 is connected to the solvent tank 1, a pressurizing device is installed on the physical shearer 3, and the material of the extraction tower 4 is any one of metal, glass or polymer material.

[0060] A method for extracting trimethylolpropane by calcium process, according to any of the above-mentioned devices for extracting trimethylolpropane by calcium process, comprising the following steps:

[0061] Step S1, preheating the solvent tank 1 and the stock solution tank 2;

[0062] Step S2, after the temperatures in the solvent tank 1 and the stock solution tank 2 are stabilized, feed materials into the physical shearing device 3 through the solvent feed pump 8 and the stock solution pump 9 respectively;

[0063] Step S3, the fully mixed material is taken out from the pressurizing device on the physical shearer 3 and enters the extraction tower 4;

[0064] Step S4, directly feeding the mixed material fully mixed by the physical shearer 3 into the middle of the extraction tower 4, and adjusting the temperature of the extraction tower 4;

[0065] Step S5, extracting the extract phase from the top of the extraction tower 4 and extracting the raffinate phase from the bottom of the extraction tower 4, and storing them in the extract phase tank 5 and the raffinate phase tank 6 respectively.

[0066] Specifically, the temperature of the solvent tank 1 is controlled at 75°C, the temperature of the stock solution tank is controlled at 95°C, the feed ratio of the solvent in the solvent tank 1 to the stock solution in the stock solution tank 2 is 2.5:1, and the temperature of the extraction tower 4 is controlled at 75°C.

[0067] The extraction work was carried out using Example 1, Example 2 and Example 3, and three groups of control experiments were prepared, which were marked as Control Group 1, Control Group 2 and Control Group 3, respectively. The steps of Control Group 1 were the same as those of Example 1, except that the physical shearer 3 was not used. The steps of Control Group 2 were the same as those of Example 2, except that the physical shearer 3 was not used. The steps of Control Group 3 were the same as those of Example 3, except that the physical shearer 3 was not used. The content of trimethylolpropane in the extraction phase tank 5 was detected, and the results are shown in the following table.

[0068]

[0069] It can be seen from the above table that the present invention can effectively improve the extraction efficiency, and Example 2 is the best example.

[0070] The above is a detailed introduction to the calcium-based trimethylolpropane extraction device and method provided by the present invention. Specific embodiments are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A calcium process trimethylolpropane extraction device, characterized in that: include: A solvent tank (1), a raw liquid tank (2), a physical shearer (3), an extraction tower (4), an extraction phase tank (5), an extract phase tank (6), a solvent pump (7), a solvent feed pump (8) and a raw liquid pump (9); The physical shearer (3) is connected to a solvent feed pump (8), a stock liquid pump (9) and an extraction tower (4), the extraction tower (4) is connected to an extraction phase tank (5) and a raffinate phase tank (6), and the solvent feed pump (8) and the stock liquid pump (9) are connected to a solvent tank (1) and a stock liquid tank (2), respectively.

2. The calcium process trimethylolpropane extraction device according to claim 1, characterized in that: The solvent pump (7) is connected to the solvent tank (1).

3. The calcium process trimethylolpropane extraction device according to claim 1, characterized in that: The physical shear (3) is equipped with a pressurizing device.

4. The calcium process trimethylolpropane extraction device according to claim 1, characterized in that: The material of the extraction tower (4) is any one of metal, glass or polymer material.

5. A method for extracting trimethylolpropane by calcium process, according to the device for extracting trimethylolpropane by calcium process according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step S1, preheating the solvent tank (1) and the stock solution tank (2); Step S2, after the temperatures in the solvent tank (1) and the stock solution tank (2) are stabilized, the materials are fed into the physical shearing device (3) through the solvent feed pump (8) and the stock solution pump (9) respectively; Step S3, the fully mixed material is taken out from the pressurizing device on the physical shearer (3) and enters the extraction tower (4); Step S4, directly feeding the mixed material fully mixed by the physical shearer (3) into the middle of the extraction tower (4), and adjusting the temperature of the extraction tower (4); Step S5, extracting the extract phase from the top of the extraction tower (4), and extracting the raffinate phase from the bottom of the extraction tower (4), and storing them in the extract phase tank (5) and the raffinate phase tank (6), respectively.

6. The method for extracting trimethylolpropane using calcium method according to claim 5, characterized in that: The temperature of the solvent tank (1) is controlled within the range of 60-75°C, and the temperature of the stock solution tank (2) is controlled within the range of 75-95°C.

7. The method for extracting trimethylolpropane using calcium method according to claim 5, characterized in that: The feed ratio of the solvent in the solvent tank (1) to the stock solution in the stock solution tank (2) is (2-2.5):1 respectively.

8. The method for extracting trimethylolpropane using calcium method according to claim 5, characterized in that: The temperature of the extraction tower (4) is controlled within the range of 60-75°C.

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