Thiothiamine condensation intermediate filtering and dissolving device

Abstract

The utility model discloses a thiothiamine condensation intermediate filtering and dissolving device, which relates to the technical field of thiothiamine condensation intermediates, and comprises a condensation reaction pot, a filter pressing tank, a filtrate settling tank, a filtrate separating tank and a methanol mother liquor storage tank which are sequentially connected, and a stirring device and a plurality of filtering devices are arranged in the filter pressing tank. The filtering device is communicated with the filtrate depositing tank, a supernatant outlet of the filtrate depositing tank is communicated with a liquid inlet of the filtrate separating tank, and a bottom outlet of the filtrate depositing tank and a bottom outlet of the filtrate separating tank are respectively communicated with the filter pressing tank; the feed liquid containing the thiothiamine condensation intermediates is subjected to circulating filter pressing and washing for multiple times, so that more thiothiamine condensation intermediates can be recycled, the filtering efficiency is improved, the production cost is reduced, meanwhile, filter pressing and dissolving are carried out in a filter pressing tank, the thiothiamine condensation intermediates do not need to be collected, transferred and fed, the operation is simple, and the cost is low. The production process is accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of thiothiamine condensation intermediates, in particular to a thiothiamine condensation intermediate filtering and dissolving device. Background Art

[0002] At present, the filtration and dissolution of the thiothiamine condensation intermediate require the use of a plate and frame filter and a dissolution kettle. During the filtration, the mother liquor needs to be filtered in the plate and frame filter first to collect the thiothiamine condensation intermediate, and then transferred to the dissolution kettle for heating, and further reacted after being dissolved with hydrochloric acid. This method requires the collection, transportation and feeding of the thiothiamine condensation intermediate, which is cumbersome to operate and affects the normal production operation of the workshop. At the same time, the filtration efficiency is not ideal and the production cost is high.

[0003] At present, no filtering and dissolving device similar to the utility model has been found. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a thiothiamine condensation intermediate filtering and dissolving device in view of the above shortcomings, which overcomes the defects of the existing cumbersome operation, unsatisfactory filtering efficiency and high production cost; and achieves the purpose of simple operation, good filtering efficiency and low production cost.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a thiothiamine condensation intermediate filtering and dissolving device, characterized in that it comprises a condensation reaction pot, a filter press tank, a filtrate precipitation tank, a filtrate separation tank and a methanol mother liquor storage tank connected in sequence;

[0006] The filter press tank is provided with a stirring device and a plurality of filtering devices, and the filtering devices are connected to the filtrate precipitation tank;

[0007] The supernatant outlet of the filtrate precipitation tank is communicated with the liquid inlet of the filtrate separation tank, and the bottom outlet of the filtrate precipitation tank and the bottom outlet of the filtrate separation tank are respectively communicated with the filter press tank.

[0008] Furthermore, the filtering device is sequentially connected to a mother liquid precipitation tank and a mother liquid separation tank;

[0009] The supernatant outlet of the mother liquid precipitation tank is communicated with the liquid inlet of the mother liquid separation tank, and the bottom outlet of the mother liquid precipitation tank and the bottom outlet of the mother liquid separation tank are respectively communicated with the filter press tank.

[0010] Furthermore, a precipitation liquid delivery pump is provided between the bottom outlet of the mother liquor separation tank and the filter press tank.

[0011] Furthermore, the supernatant outlet of the mother liquor separation tank is connected to a wastewater tank.

[0012] Furthermore, a methanol mother liquor pump is provided between the supernatant liquid outlet of the filtrate separation tank and the methanol mother liquor storage tank.

[0013] Furthermore, the filter press tank is respectively connected to a hydrochloric acid metering tank, a hot water metering tank, a pure water tank and a storage tank, and the pure water tank is respectively connected to the hot water metering tank and the condensation reaction pot.

[0014] Furthermore, a hydrochloric acid delivery pump is provided between the filter press tank and the hydrochloric acid metering tank, and a hot water delivery pump is provided between the filter press tank and the hot water metering tank.

[0015] The utility model adopts the above technical scheme, and has the following advantages compared with the prior art: first, aminomethylpyrimidine is placed in a condensation reaction pot for condensation reaction to generate a feed liquid containing a thiothiamine condensation intermediate, and when the temperature of the condensation reaction pot drops below 25° C., the feed liquid in the condensation reaction pot is discharged into a filter press tank, and at the same time, a stirring device in the filter press tank is turned on to fully stir the feed liquid, and after the discharge is completed, water is added to rinse the condensation reaction pot, and the washing liquid is discharged into the filter press tank.

[0016] Secondly, the filter press tank is pressurized to control the maximum pressure not to exceed 0.2MPa. The filter press liquid in the feed liquid is intercepted by the filtering device, and the thiothiamine condensation intermediate and a small amount of the filter press liquid are stored in the filter press tank. The filter press liquid in the filtering device is discharged into the filtrate precipitation tank for precipitation. The upper part is the supernatant, and the lower part is the precipitate containing the thiothiamine condensation intermediate. The supernatant in the filtrate precipitation tank is discharged into the filtrate separation tank. After separation in the filtrate separation tank, the upper part is methanol and the lower part is the precipitate containing the thiothiamine condensation intermediate. The methanol is transported to the methanol mother liquor storage tank by a methanol mother liquor pump, and the precipitate containing the thiothiamine condensation intermediate in the filtrate precipitation tank and the lower part of the filtrate separation tank is discharged back into the filter press tank.

[0017] Then, the thiothiamine condensation intermediate, a small portion of the filtrate and the precipitate containing the thiothiamine condensation intermediate stored in the filter press tank are rinsed and filtered, the pure water in the pure water tank is transported to the filter press tank, the stirring device is turned on and pressurized, the washing water filtered out is discharged into the mother liquor precipitation tank for precipitation, the upper part is waste water, and the lower part is the precipitate containing the thiothiamine condensation intermediate, the waste water is discharged into the mother liquor separation tank, after separation in the mother liquor separation tank, the upper part is waste water, and the lower part is the precipitate containing the thiothiamine condensation intermediate, the upper waste water is discharged to the wastewater pool, the precipitate in the mother liquor precipitation tank and the lower part of the mother liquor separation tank is re-transported to the filter press tank by the precipitate delivery pump, and the first washing and filtration is completed.

[0018] The purified water is transported to the filter press tank again, and the above operation is repeated 3-5 times. When the washing water filtered out is clear, the washing operation is no longer performed. At this time, only the thiothiamine condensation intermediate is present in the filter press tank.

[0019] The hydrochloric acid in the hydrochloric acid metering tank is delivered to the filter press tank by a hydrochloric acid delivery pump, and the hot water at 80° C. in the hot water metering tank is delivered to the filter press tank by a hot water delivery pump. The stirring device is turned on to completely dissolve the thiothiamine condensation intermediate to form a cyclization liquid, and the cyclization liquid is completely discharged into the storage tank for subsequent reactions.

[0020] Finally, the pure water is discharged into the filter press tank to be filled with washing, and the washing water in the filter press tank is discharged into the mother liquor sedimentation tank, and then discharged to the wastewater pool through the mother liquor separation tank.

[0021] The utility model performs multiple cycles of filter pressing and washing on the feed liquid containing the thiothiamine condensation intermediate, so that more thiothiamine condensation intermediates can be recycled and reused, the filtering efficiency is improved, and the production cost is reduced. At the same time, the filter pressing and dissolving are both carried out in the filter press tank, and the thiothiamine condensation intermediates do not need to be collected, transported or fed, the operation is simple, and the production process is accelerated. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a thiothiamine condensation intermediate filtering and dissolving device in an embodiment of the utility model.

[0023] In the figure: 1-condensation reaction pot, 2-filter press tank, 3-storage tank, 4-pure water tank, 5-filtrate precipitation tank, 6-filtrate separation tank, 7-mother liquor precipitation tank, 8-mother liquor separation tank, 9-hydrochloric acid metering tank, 10-hot water metering tank, 11-methanol mother liquor pump, 12-precipitate delivery pump, 13-hydrochloric acid delivery pump, 14-hot water delivery pump, 15-stirring device, 16-filtering device, 17-methanol mother liquor storage tank, 18-wastewater tank. DETAILED DESCRIPTION

[0024] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Examples, such as Figure 1 As shown, a thiothiamine condensation intermediate filtering and dissolving device comprises a condensation reaction pot 1, a filter press tank 2, a filtrate precipitation tank 5, a filtrate separation tank 6 and a methanol mother liquor storage tank 17 which are connected in sequence, the filter press tank 2 is respectively connected with a hydrochloric acid metering tank 9, a hot water metering tank 10, a pure water tank 4 and a storage tank 3, the pure water tank 4 is respectively connected with the hot water metering tank 10 and the condensation reaction pot 1, a hydrochloric acid delivery pump 13 is provided between the filter press tank 2 and the hydrochloric acid metering tank 9, and a hot water delivery pump 14 is provided between the filter press tank 2 and the hot water metering tank 10.

[0026] A stirring device 15 and a plurality of filtering devices 16 are provided in the filter press tank 2. The filtering device 16 is connected to the filtrate sedimentation tank 5. The supernatant outlet of the filtrate sedimentation tank 5 is connected to the liquid inlet of the filtrate separation tank 6. The bottom outlet of the filtrate sedimentation tank 5 and the bottom outlet of the filtrate separation tank 6 are respectively connected to the filter press tank 2. A methanol mother liquor pump 11 is provided between the supernatant outlet of the filtrate separation tank 6 and the methanol mother liquor storage tank 17.

[0027] The filtering device 16 is connected to the mother liquor sedimentation tank 7 and the mother liquor separation tank 8 in sequence, the supernatant outlet of the mother liquor sedimentation tank 7 is connected to the liquid inlet of the mother liquor separation tank 8, the bottom outlet of the mother liquor sedimentation tank 7 and the bottom outlet of the mother liquor separation tank 8 are respectively connected to the filter press tank 2, a sedimentation liquid delivery pump 12 is provided between the bottom outlet of the mother liquor separation tank 8 and the filter press tank 2, and the supernatant outlet of the mother liquor separation tank 8 is connected to the wastewater tank 18.

[0028] Working principle: First, aminomethylpyrimidine is placed in the condensation reaction pot 1 for condensation reaction to generate a feed liquid containing thiothiamine condensation intermediates. When the temperature of the condensation reaction pot 1 drops below 25°C, the feed liquid in the condensation reaction pot 1 is discharged into the filter press tank 2, and the stirring device 15 in the filter press tank 2 is turned on to fully stir the feed liquid. After the discharge is completed, water is added to rinse the condensation reaction pot 1, and the washing liquid is discharged into the filter press tank 2.

[0029] Secondly, the filter press tank 2 is pressurized to control the maximum pressure not to exceed 0.2 MPa. The filter device 16 intercepts the filter press liquid in the feed liquid, and the thiothiamine condensation intermediate and a small amount of the filter press liquid are stored in the filter press tank 2. The filter press liquid in the filter device 16 is discharged into the filtrate precipitation tank 5 for precipitation, the upper part is the supernatant, and the lower part is the precipitate containing the thiothiamine condensation intermediate. The supernatant in the filtrate precipitation tank 5 is discharged into the filtrate separation tank 6. After separation in the filtrate separation tank 6, the upper part is methanol and the lower part is the precipitate containing the thiothiamine condensation intermediate. The methanol is transported to the methanol mother liquor storage tank 17 by the methanol mother liquor pump 11, and the precipitate containing the thiothiamine condensation intermediate in the filtrate precipitation tank 5 and the lower part of the filtrate separation tank 6 is discharged back into the filter press tank 2.

[0030] Then, the thiothiamine condensation intermediate, a small portion of the filtrate and the precipitate containing the thiothiamine condensation intermediate stored in the filter press 2 are rinsed and filtered, the pure water in the pure water tank 4 is transported to the filter press 2, the stirring device 15 is turned on and pressurized, the washing water filtered out is discharged into the mother liquor precipitation tank 7 for precipitation, the upper part is waste water, and the lower part is the precipitate containing the thiothiamine condensation intermediate, the waste water is discharged into the mother liquor separation tank 8, after separation in the mother liquor separation tank 8, the upper part is waste water, and the lower part is the precipitate containing the thiothiamine condensation intermediate, the upper waste water is discharged to the wastewater pool 20, the precipitate at the bottom of the mother liquor precipitation tank 7 and the mother liquor separation tank 8 is re-transported to the filter press 2 by the precipitate delivery pump 12, and the first washing and filtration is completed.

[0031] The purified water is transported to the filter press tank 2 again, and the above operation is repeated 3-5 times. When the washing water filtered out is clear, the washing operation is no longer performed. At this time, only the thiothiamine condensation intermediate is present in the filter press tank 2.

[0032] The hydrochloric acid in the hydrochloric acid metering tank 9 is delivered to the filter press tank 2 by the hydrochloric acid delivery pump 13, and the hot water at 80° C. in the hot water metering tank 10 is delivered to the filter press tank 2 by the hot water delivery pump 14. The stirring device 15 is turned on to completely dissolve the thiothiamine condensation intermediate to form a cyclization liquid, and the cyclization liquid is completely discharged into the storage tank 3 for subsequent reactions.

[0033] Finally, the purified water is discharged into the filter press tank 2 to be filled with washing, and the washing water in the filter press tank 2 is discharged into the mother liquor precipitation tank 7, and discharged to the wastewater tank 20 through the mother liquor separation tank 8.

[0034] The utility model performs multiple cycles of filter pressing and washing of the feed liquid containing the thiothiamine condensation intermediate, so that more thiothiamine condensation intermediates can be recycled and reused, the filtration efficiency is improved, and the production cost is reduced. At the same time, the filter pressing and dissolving are both performed in the filter press tank 2, and there is no need to collect, transport and feed the thiothiamine condensation intermediates, the operation is simple, and the production process is accelerated.

[0035] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A thiothiamine condensation intermediate filtering and dissolving device, characterized in that: It comprises a condensation reaction pot (1), a filter press tank (2), a filtrate precipitation tank (5), a filtrate separation tank (6) and a methanol mother liquor storage tank (17) which are connected in sequence; The filter press tank (2) is provided with a stirring device (15) and a plurality of filtering devices (16), and the filtering devices (16) are connected to the filtrate sedimentation tank (5); The supernatant outlet of the filtrate precipitation tank (5) is connected to the liquid inlet of the filtrate separation tank (6), and the bottom outlet of the filtrate precipitation tank (5) and the bottom outlet of the filtrate separation tank (6) are respectively connected to the filter press tank (2).

2. The thiothiamine condensation intermediate filtering and dissolving device as claimed in claim 1, characterized in that: The filtering device (16) is sequentially connected to a mother liquid precipitation tank (7) and a mother liquid separation tank (8); The supernatant liquid outlet of the mother liquid precipitation tank (7) is connected to the liquid inlet of the mother liquid separation tank (8), and the bottom outlet of the mother liquid precipitation tank (7) and the bottom outlet of the mother liquid separation tank (8) are respectively connected to the filter press tank (2).

3. The thiothiamine condensation intermediate filtering and dissolving device as claimed in claim 2, characterized in that: A precipitation liquid delivery pump (12) is provided between the bottom outlet of the mother liquid separation tank (8) and the filter press tank (2).

4. The thiothiamine condensation intermediate filtering and dissolving device as claimed in claim 3, characterized in that: The supernatant liquid outlet of the mother liquid separation tank (8) is connected to a wastewater tank (18).

5. The thiothiamine condensation intermediate filtering and dissolving device as claimed in claim 1, characterized in that: A methanol mother liquor pump (11) is provided between the supernatant liquid outlet of the filtrate separation tank (6) and the methanol mother liquor storage tank (17).

6. The thiothiamine condensation intermediate filtering and dissolving device as claimed in claim 3, characterized in that: The filter press tank (2) is respectively connected to a hydrochloric acid metering tank (9), a hot water metering tank (10), a pure water tank (4) and a storage tank (3); the pure water tank (4) is respectively connected to a hot water metering tank (10) and a condensation reaction pot (1).

7. The thiothiamine condensation intermediate filtering and dissolving device as claimed in claim 6, characterized in that: A hydrochloric acid delivery pump (13) is provided between the filter press tank (2) and the hydrochloric acid metering tank (9), and a hot water delivery pump (14) is provided between the filter press tank (2) and the hot water metering tank (10).

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