A phenyldichlorophosphine crude product impurity removal device

Abstract

The utility model relates to the technical field of chemical engineering and process equipment, especially a phenyl dichloride phosphorus crude product impurity removal device, when using, the raw materials are transported through the infusion assembly, after the raw materials enter the inside of the casing and filter through the filter screen, the impurities stay on the filter screen, the raw materials that filter through are transported to the next procedure through the infusion assembly, use a period of time, the impurities cause the blockage of filter screen, and the staff operates the purging assembly to purge and empty the raw materials in the inside of the casing, improve the filtering efficiency, including casing and filter screen, the inside of casing is provided with filter screen, still include: infusion assembly, its installation is in the casing, is used for the transportation of raw materials, back cleaning assembly, its setting is on the infusion assembly, is used for the cleaning of the impurity on the filter screen, collection assembly, its fixed in the casing bottom end, is used for collecting waste liquid, purging assembly, its installation is on the infusion assembly, is used for purging the raw materials in the inside of the casing.

Description

Technical Field

[0001] This utility model relates to the technical field of chemical engineering and process equipment, and in particular to a device for removing impurities from crude phenyl dichloride phosphorus. Background Technology

[0002] Phenylated phosphorus dichloride is an indispensable key intermediate in organic synthesis. Its industrial-grade crude product has a complex composition, often containing volatile impurities such as hydrogen chloride and phosphorus trichloride, as well as solid particulate impurities such as tar and catalyst residues generated from side reactions, in addition to the target product. If these impurities directly enter the subsequent distillation stage, they will lead to a series of problems, including distillation tray blockage, decreased heat exchange efficiency, and fluctuations in product purity, severely restricting production continuity and economic efficiency. Therefore, efficient and safe pre-treatment of the crude product is a crucial step in improving the efficiency and quality of the entire phenyl dichloride production process.

[0003] Currently, existing technologies for the separation and purification of phenylphosphine compounds mostly focus on the precision fractionation of multi-component mixtures. For example, Chinese utility model patent CN218421082U discloses a "continuous distillation column for separating phenylphosphine," which achieves continuous separation of products such as monophenylphosphine dichloride, diphenylphosphine chloride, and triphenylphosphine through a multi-column series connection and temperature control system. This technical solution targets liquid mixtures that have undergone preliminary treatment, and its core inventive point lies in achieving fine separation of components with different boiling points through temperature gradients.

[0004] However, this existing technology has obvious limitations, making it unsuitable for pre-treatment of crude phenylphosphine dichloride: Functional mismatch: This unit is a distillation apparatus designed for "separation," not "impurity removal." It cannot effectively handle crude materials containing solid particles and high-viscosity tar, as these impurities will quickly clog its trays or packing, leading to unit failure.

[0005] Structural deficiencies: Its overall structure does not include any filtration unit for solid particles, a closed protection system for active materials, or a backwashing mechanism for viscous impurities, and it lacks the physical screening and cleaning functions necessary for crude product pretreatment. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a device for removing impurities from crude phenyl dichloride.

[0007] This utility model discloses a device for removing impurities from crude phenyl dichloride, comprising a housing and a filter screen, wherein the filter screen is disposed inside the housing, and further comprising: An infusion assembly, mounted on a housing, is used for the delivery of raw materials; The backwashing assembly, which is installed on the infusion assembly, is used to clean impurities from the filter screen; A collection component, fixed to the bottom of the housing, is used to collect waste liquid; The purging assembly, installed on the infusion assembly, is used to purge the raw materials inside the housing. During use, the raw materials are transported through the infusion assembly. After entering the housing and being filtered by the filter screen, impurities remain on the filter screen. The filtered raw materials are then transported to the next process through the infusion assembly. After a period of use, impurities clog the filter screen. The operator operates the purging assembly to purge and empty the raw materials inside the housing. Afterward, the backwashing assembly is operated to clean the impurities on the filter screen. The waste liquid after cleaning is collected by the collection assembly, improving filtration efficiency.

[0008] Preferably, the infusion assembly includes an inlet pipe, an inlet valve, an outlet pipe, and an outlet valve. The inlet pipe is fixedly disposed at the left end of the housing; the inlet valve is disposed on the inlet pipe; the outlet pipe is fixedly installed at the right end of the housing; the outlet valve is installed on the outlet pipe; the output end of the inlet pipe is connected to the left end of the housing, and the input end of the outlet pipe is connected to the right end of the housing; the purging assembly is installed on the inlet pipe, and the backwashing assembly is installed on the outlet pipe; in use, the inlet valve and the outlet valve are opened, so that the raw material enters the interior of the housing through the inlet pipe and passes through the filter screen to remove impurities. Filtration occurs when impurities remain on the left side of the filter screen. The filtered raw material is then transported to the next process via the liquid outlet pipe. When it is necessary to clean the impurities on the left side of the filter screen after a period of use, the operator closes the liquid inlet valve, allowing nitrogen gas to enter the housing through the purging assembly and the liquid inlet pipe to purge the raw material inside the housing. The remaining raw material in the housing is then discharged through the liquid outlet pipe. After purging, the liquid outlet valve is closed, and then the backwashing assembly is operated to allow the cleaning liquid to enter the housing through the liquid outlet pipe and backwash the filter screen. The waste liquid is then collected by the collection assembly. The cleaning liquid is anhydrous toluene.

[0009] Preferably, the backwashing assembly includes a storage tank, a delivery pump, a delivery pipe, and a delivery valve. The storage tank is fixedly installed on the top of the base plate, and the delivery pump is located on the top of the base plate, with its input end connected to the output end of the storage tank. The delivery pipe is located at the output end of the delivery pump, and its output end is connected to the outlet pipe. The delivery valve is fixedly installed on the delivery pipe. The storage tank contains anhydrous toluene cleaning solution. After the purging assembly has finished purging the inside of the housing, the outlet valve is closed, and then the delivery valve is opened and the delivery pump is started. This allows the anhydrous toluene inside the storage tank to enter the housing through the delivery pipe and the outlet pipe, thereby backwashing the impurities on the left side of the filter screen. The resulting waste liquid is collected by the collection assembly, improving the backwashing efficiency of the filter screen.

[0010] Preferably, the purging assembly includes a purging pipe and a purging valve. The purging pipe is fixedly installed on the liquid inlet pipe, and the output end of the purging pipe is connected to the outer wall of the liquid inlet pipe. The purging valve is fixed on the purging pipe. When purging the inside of the shell, the input end of the purging pipe is connected to a nitrogen source, and the purging valve is opened, so that nitrogen enters the inside of the shell through the purging pipe and the liquid inlet pipe and purges the raw materials inside the shell so that the raw materials are discharged through the liquid outlet pipe. After purging, the liquid outlet valve and the purging valve are closed, and the cleaning begins.

[0011] Preferably, the collection assembly includes a three-way pipe, an infusion pipe, an infusion valve, a collection pipe, a collection valve, and a waste liquid collection tank. The three-way pipe is installed at the bottom of the housing and is located to the left of the filter screen. Two sets of infusion pipes are connected to the two output ends of the three-way pipe, respectively. Two sets of infusion valves are installed on the two sets of infusion pipes, respectively. Two sets of collection pipes are connected to the output ends of the two sets of infusion pipes via flanges, respectively. Two sets of collection valves are fixedly installed on the two sets of collection pipes, respectively. Two sets of waste liquid collection tanks are fixedly installed at the output ends of the two sets of collection pipes, respectively. By opening one set of infusion valves and collection valves and closing the other set of infusion valves and collection valves, the waste liquid enters the waste liquid collection tank inside the housing through the three-way pipe, one set of infusion pipes, and one set of collection pipes. After the waste liquid collection tank has finished collecting, the corresponding infusion valves and collection valves are closed, and the flange connection between the collection pipe and the infusion pipe is disconnected, thereby transferring the waste liquid collection tank containing the waste liquid. The other set of waste liquid collection tanks remains in standby mode, improving collection efficiency.

[0012] Preferably, a check valve is provided on the purge pipe; the check valve works in conjunction with the purge valve to prevent the material inside the shell from flowing out, thereby improving protection.

[0013] Preferably, a second check valve is provided on the conveying pipe; the second check valve works in conjunction with the conveying valve to prevent the raw material inside the shell from flowing inside the conveying pipe, thereby improving protection.

[0014] Preferably, the filter screen is made of polytetrafluoroethylene.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: During use, the raw material is transported through the infusion assembly. After the raw material enters the shell and is filtered by the filter screen, the impurities remain on the filter screen. The filtered raw material is then transported to the next process through the infusion assembly. After a period of use, the impurities clog the filter screen. The operator operates the purging assembly to purge and empty the raw material inside the shell. Then, the backwashing assembly is operated to clean the impurities on the filter screen. The waste liquid after cleaning is collected through the collection assembly, thereby improving the filtration efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first isometric structure of this utility model; Figure 2This is a schematic diagram of the second isometric structure of this utility model; Figure 3 This is an exploded structural diagram of the present invention; Figure 4 This is an enlarged structural diagram of the waste liquid collection tank and the three-way pipe, etc. Figure 5 It is an enlarged structural diagram of the liquid storage tank and filter screen, etc.

[0017] The following are labels in the attached diagram: 1. Shell; 2. Filter screen; 3. Inlet pipe; 4. Inlet valve; 5. Outlet pipe; 6. Outlet valve; 7. Storage tank; 8. Transfer pump; 9. Transfer pipe; 10. Transfer valve; 11. T-connector; 12. Transfer pipe; 13. Transfer valve; 14. Collection pipe; 15. Collection valve; 16. Waste liquid collection tank; 17. Check valve No. 1; 18. Check valve No. 2; 19. Purge pipe; 20. Purge valve. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example

[0019] like Figures 1 to 5 As shown, the present invention provides a crude phenyl dichloride phosphorus purification device, comprising a housing 1 and a filter screen 2. The filter screen 2 is disposed inside the housing 1. The device further comprises: a liquid delivery assembly installed on the housing 1 for conveying raw materials; a backwashing assembly disposed on the liquid delivery assembly for cleaning impurities on the filter screen 2; a collection assembly fixed at the bottom of the housing 1 for collecting waste liquid; and a purging assembly installed on the liquid delivery assembly for purging the raw materials inside the housing 1. like Figure 1 and Figure 3 As shown, the infusion assembly includes an inlet pipe 3, an inlet valve 4, an outlet pipe 5, and an outlet valve 6. The inlet pipe 3 is fixedly disposed on the left end of the housing 1; the inlet valve 4 is disposed on the inlet pipe 3; the outlet pipe 5 is fixedly installed on the right end of the housing 1; the outlet valve 6 is installed on the outlet pipe 5; the output end of the inlet pipe 3 is connected to the left end of the housing 1, and the input end of the outlet pipe 5 is connected to the right end of the housing 1; the purging assembly is installed on the inlet pipe 3, and the backwashing assembly is installed on the outlet pipe 5. like Figure 2 and Figure 3As shown, the backwashing assembly includes a storage tank 7, a transfer pump 8, a transfer pipe 9, and a transfer valve 10. The storage tank 7 is fixedly installed on the top of the base plate. The transfer pump 8 is located on the top of the base plate, and its input end is connected to the output end of the storage tank 7. The transfer pipe 9 is located at the output end of the transfer pump 8, and its output end is connected to the outlet pipe 5. The transfer valve 10 is fixedly installed on the transfer pipe 9. like Figure 1 As shown, the purging assembly includes a purging pipe 19 and a purging valve 20. The purging pipe 19 is fixedly installed on the inlet pipe 3, and the output end of the purging pipe 19 is connected to the outer wall of the inlet pipe 3. The purging valve 20 is fixed on the purging pipe 19.

[0020] In this embodiment, during use, the inlet valve 4 and outlet valve 6 are opened, allowing the raw material to enter the housing 1 through the inlet pipe 3 and be filtered for impurities through the filter screen 2. The impurities remain on the left end of the filter screen 2. The filtered raw material is then transported to the next process through the outlet pipe 5. When it is necessary to clean the impurities on the left side of the filter screen 2 after a period of use, the operator closes the inlet valve 4 and opens the purge valve 20 to allow nitrogen gas to enter the housing 1 through the purge pipe 19 and the inlet pipe 3 to purge the raw material inside the housing 1. The remaining raw material in the housing 1 is then discharged through the outlet pipe 5. After purging, the outlet valve 6 and the purge valve 20 are closed. Then, the delivery valve 10 is opened and the delivery pump 8 is started, allowing the anhydrous toluene inside the storage tank 7 to enter the housing 1 through the delivery pipe 9 and the outlet pipe 5. This backwashes the impurities on the left side of the filter screen 2, and the resulting waste liquid is collected through the collection assembly. Example

[0021] like Figures 1 to 5 As shown, the present invention provides a crude phenyl dichloride phosphorus purification device, comprising a housing 1 and a filter screen 2. The filter screen 2 is disposed inside the housing 1. The device further comprises: a liquid delivery assembly installed on the housing 1 for conveying raw materials; a backwashing assembly disposed on the liquid delivery assembly for cleaning impurities on the filter screen 2; a collection assembly fixed at the bottom of the housing 1 for collecting waste liquid; and a purging assembly installed on the liquid delivery assembly for purging the raw materials inside the housing 1. like Figure 1 and Figure 3 As shown, the infusion assembly includes an inlet pipe 3, an inlet valve 4, an outlet pipe 5, and an outlet valve 6. The inlet pipe 3 is fixedly disposed on the left end of the housing 1; the inlet valve 4 is disposed on the inlet pipe 3; the outlet pipe 5 is fixedly installed on the right end of the housing 1; the outlet valve 6 is installed on the outlet pipe 5; the output end of the inlet pipe 3 is connected to the left end of the housing 1, and the input end of the outlet pipe 5 is connected to the right end of the housing 1; the purging assembly is installed on the inlet pipe 3, and the backwashing assembly is installed on the outlet pipe 5. like Figure 2 and Figure 3 As shown, the backwashing assembly includes a storage tank 7, a transfer pump 8, a transfer pipe 9, and a transfer valve 10. The storage tank 7 is fixedly installed on the top of the base plate. The transfer pump 8 is located on the top of the base plate, and its input end is connected to the output end of the storage tank 7. The transfer pipe 9 is located at the output end of the transfer pump 8, and its output end is connected to the outlet pipe 5. The transfer valve 10 is fixedly installed on the transfer pipe 9. like Figure 1 and Figure 3 As shown, the purging assembly includes a purging pipe 19 and a purging valve 20. The purging pipe 19 is fixedly installed on the inlet pipe 3, and the output end of the purging pipe 19 is connected to the outer wall of the inlet pipe 3. The purging valve 20 is fixed on the purging pipe 19. like Figure 4 As shown, the collection assembly includes a three-way pipe 11, an infusion pipe 12, an infusion valve 13, a collection pipe 14, a collection valve 15, and a waste liquid collection tank 16. The three-way pipe 11 is installed at the bottom of the housing 1, and the three-way pipe 11 is on the left side of the filter screen 2. Two sets of infusion tubes 12 are respectively connected to the two output ends of the three-way tube 11; two sets of infusion valves 13 are respectively installed on the two sets of infusion tubes 12; two sets of collection tubes 14 are respectively connected to the output ends of the two sets of infusion tubes 12 through flanges; two sets of collection valves 15 are respectively fixedly installed on the two sets of collection tubes 14; two sets of waste liquid collection tanks 16 are respectively fixedly installed on the output ends of the two sets of collection tubes 14. The purge pipe 19 is equipped with a first check valve 17; the delivery pipe 9 is equipped with a second check valve 18; and the filter screen 2 is made of polytetrafluoroethylene.

[0022] In this embodiment, during use, the inlet valve 4 and outlet valve 6 are opened, allowing the raw material to enter the housing 1 through the inlet pipe 3 and pass through the filter screen 2 for impurity filtration. Impurities remain on the left end of the filter screen 2. The filtered raw material is then conveyed to the next process through the outlet pipe 5. When it is necessary to clean the impurities on the left side of the filter screen 2 after a period of use, the operator closes the inlet valve 4 and opens the purge valve 20 to allow nitrogen gas to enter the housing 1 through the purge pipe 19 and the inlet pipe 3, purging the raw material inside the housing 1. The remaining raw material in the housing 1 is then discharged through the outlet pipe 5. After purging is complete, the outlet valve 6 and purge valve 20 are closed, and then the conveying valve 10 is opened and the conveying process is started. Pump 8 causes the anhydrous toluene inside the storage tank 7 to enter the housing 1 through the delivery pipe 9 and the outlet pipe 5, thereby backwashing the impurities on the left side of the filter screen 2. One set of delivery valves 13 and collection valves 15 are opened and another set of delivery valves 13 and collection valves 15 are closed. The waste liquid enters the housing 1 through the three-way pipe 11, a set of delivery pipes 12 and a set of collection pipes 14 into a waste liquid collection tank 16. After the waste liquid collection tank 16 has finished collecting, the corresponding delivery valves 13 and collection valves 15 are closed, and the flange connection between the collection pipe 14 and the delivery pipe 12 is disconnected, thereby transferring the waste liquid collection tank 16 containing the waste liquid. The other set of waste liquid collection tanks 16 is kept in standby status.

[0023] This utility model discloses a crude phenyl dichloride purification device. Phenyl dichloride needs to be isolated from air and water. The filter screen 2 and the conveying pump 8 of this crude phenyl dichloride purification device are commercially available. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A device for removing impurities from crude phenylphosphine dichloride, characterized in that, The system includes a housing (1) and a filter screen (2), wherein the filter screen (2) is disposed inside the housing (1), and further includes: An infusion assembly, which is mounted on a housing (1), is used for the delivery of raw materials; A backwashing assembly, which is installed on the infusion assembly, is used to clean impurities on the filter screen (2); A collection component, which is fixed to the bottom of the housing (1), is used to collect waste liquid; The purging assembly, which is installed on the infusion assembly, is used to purge the raw materials inside the housing (1).

2. The apparatus for removing impurities from crude phenyl phosphorus dichloride as described in claim 1, characterized in that, The infusion assembly includes: The liquid inlet pipe (3) is fixedly installed at the left end of the housing (1); An inlet valve (4) is installed on the inlet pipe (3); The liquid outlet pipe (5) is fixedly installed at the right end of the housing (1); A liquid outlet valve (6) is installed on the liquid outlet pipe (5); Among them, the output end of the liquid inlet pipe (3) is connected to the left end of the shell (1), and the input end of the liquid outlet pipe (5) is connected to the right end of the shell (1); The purging assembly is installed on the inlet pipe (3), and the backwashing assembly is installed on the outlet pipe (5).

3. The apparatus for removing impurities from crude phenyl phosphorus dichloride as described in claim 2, characterized in that, The backwashing components include: The liquid storage tank (7) is fixedly installed on the top of the base plate. A delivery pump (8) is installed at the top of the base plate, and the input end of the delivery pump (8) is connected to the output end of the storage tank (7); A delivery pipe (9) is provided at the output end of the delivery pump (8), and the output end of the delivery pipe (9) is connected to the liquid outlet pipe (5); The delivery valve (10) is fixedly installed on the delivery pipe (9).

4. The apparatus for removing impurities from crude phenyl phosphorus dichloride as described in claim 1, characterized in that, The collection components include: A three-way pipe (11) is installed at the bottom of the housing (1), and the three-way pipe (11) is on the left side of the filter screen (2); Two sets of infusion tubes (12) are connected to the two output ends of the three-way tube (11), respectively; Two sets of infusion valves (13) are respectively installed on the two sets of infusion tubes (12); Two sets of collection tubes (14) are respectively connected to the output ends of the two sets of infusion tubes (12) via flanges; Two sets of collection valves (15) are fixedly installed on the two sets of collection pipes (14); Two sets of waste liquid collection tanks (16) are respectively fixedly installed at the output ends of the two sets of collection pipes (14).

5. The apparatus for removing impurities from crude phenyl phosphorus dichloride as described in claim 2, characterized in that, The purging assembly includes: A purge tube (19) is fixedly installed on the inlet pipe (3), and the output end of the purge tube (19) is connected to the outer wall of the inlet pipe (3); The purge valve (20) is fixed to the purge pipe (19).

6. The apparatus for removing impurities from crude phenyl phosphorus dichloride as described in claim 5, characterized in that, A check valve (17) is provided on the purge pipe (19).

7. The apparatus for removing impurities from crude phenyl phosphorus dichloride as described in claim 3, characterized in that, The delivery pipe (9) is equipped with a second check valve (18).

8. The apparatus for removing impurities from crude phenyl phosphorus dichloride as described in claim 1, characterized in that, The filter screen (2) is made of polytetrafluoroethylene.

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