A tris-(dimethylphenyl) phosphate manufacturing process and filtering device

Abstract

The present invention belongs to the technical field of preparation of tri-(dimethylphenyl) phosphate, and in particular, is a manufacturing process and filtering device of tri-(dimethylphenyl) phosphate, comprising a base, a separation tank fixedly mounted on the top of the base, a tank cover mounted on the top of the separation tank, an annular frame fixedly mounted on the inner side of the tank cover, a filter cartridge 1 rotatably mounted on the inner side of the annular frame, a bottom plate fixedly mounted on the bottom of the filter cartridge 1, a driving mechanism for driving the filter cartridge 1 and the bottom plate to rotate is provided below the bottom plate, an extrusion discharge assembly is provided on the inner side of the filter cartridge 1, and the extrusion discharge assembly includes two filter cartridges 2 rotating and self-rotating around the axis of the filter cartridge 1. The present invention can accelerate the separation of salt solution in the material through the centrifugal mode of the filter cartridge 1 and the extrusion mode of the two filter cartridges 2, and in addition, the material after the extrusion of the filter cartridge 1 and the filter cartridge 2 can be scattered through the multiple spiral scrapers rotating on the filter cartridge 2, which is conducive to the next extrusion.

Description

Technical Field

[0001] The invention relates to the technical field of preparation of tris-(dimethylphenyl) phosphate, in particular to a manufacturing process and a filtering device of tris-(dimethylphenyl) phosphate. Background Art

[0002] Tri-(dimethylphenyl) phosphate is mainly obtained by reacting phosphorus oxychloride and dimethylphenol under the catalytic action of Lewis acid catalysts such as aluminum chloride. The purity of dimethylphenol determines the purity of tri-(dimethylphenyl) phosphate. At present, dimethylphenol is mainly extracted from coal tar or petroleum cracking products produced by coal cracking. In the process of producing tri-(dimethylphenyl) phosphate, it is necessary to put the crude ester of tri-(dimethylphenyl) phosphate into a distillation device, and raise the heating temperature of the distillation device to a certain temperature to obtain the finished product tri-(dimethylphenyl) phosphate. Before distilling the crude ester of tri-(dimethylphenyl) phosphate, it is necessary to separate the mixed salt solution therein. Some common separation equipments have low efficiency. Therefore, a manufacturing process and filtering device of tri-(dimethylphenyl) phosphate are proposed. Summary of the invention

[0003] In order to solve the shortcomings of the prior art, the present invention provides a tris-(dimethylphenyl) phosphate manufacturing process and a filtering device.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a tri-(dimethylphenyl) phosphate filtering device, comprising a base, a separation tank is fixedly installed on the top of the base, a tank cover is installed on the top of the separation tank, an annular frame is fixedly installed on the inner side of the tank cover, a filter cartridge 1 is rotatably installed on the inner side of the annular frame, a bottom plate is fixedly installed on the bottom of the filter cartridge 1, a driving mechanism for driving the filter cartridge 1 and the bottom plate to rotate is provided below the bottom plate, an extrusion discharge assembly is provided on the inner side of the filter cartridge 1, the extrusion discharge assembly comprises two filter cartridges 2 that rotate and rotate around the axis of the filter cartridge 1, the bottom of the filter cartridge 2 is slidably connected to the bottom plate, an open filter cartridge that rotates around the axis of the filter cartridge 1 is sleeved on the outer side of the filter cartridge 2, a plurality of spiral scraping sheets distributed in a circular array are sleeved on the outer side of the filter cartridge 2, the plurality of spiral scraping sheets are slidably connected to the filter cartridge 1 and the inner side of the open filter cartridge, and a discharge mechanism for discharging is provided between the two open filter cartridges.

[0005] Preferably, a feed hopper is fixedly installed through the top of the tank cover, and the driving mechanism includes a motor 1 fixedly installed on the bottom of the separation tank and an outer gear ring fixedly installed on the bottom of the base plate, and a gear 1 is meshingly connected to the outer gear ring, and the output shaft of the motor 1 rotates and extends into the separation tank and is fixedly connected to the gear 1, and a drain pipe is also fixedly installed through the bottom of the separation tank.

[0006] Preferably, the extrusion discharge assembly also includes a transmission shaft that passes through the tank cover and is rotatably connected to the tank cover, a horizontal plate is fixedly installed on the bottom end of the transmission shaft, two rotating columns are rotatably installed through the horizontal plate, and circular plates are fixedly installed on the bottom ends of the two rotating columns, and the two circular plates are respectively fixedly connected to the inner wall of the corresponding filter cartridge 2. The extrusion discharge assembly also includes a motor 2 fixedly installed on the top of the tank cover, and the output shaft of the motor 2 is fixedly connected to the top end of the transmission shaft.

[0007] Preferably, the two rotating columns are fixedly sleeved with gear 2, the two gears 2 are meshedly connected with the same inner gear ring, and the top of the inner gear ring is fixedly connected to the bottom of the tank cover.

[0008] Preferably, an open ring plate 2 is fixedly installed on the inner side of the open filter cartridge, and the open ring plate 2 is rotatably sleeved on the filter cartridge 2. The two ends of the open ring plate 2 are flush with the two sides of the open filter cartridge, and the top of the open ring plate 2 is flush with the filter cartridge 2 and the top of the open filter cartridge.

[0009] Preferably, the discharge mechanism includes two feed hoppers that pass through two open filter cartridges and are fixedly connected to the two open filter cartridges, the two feed hoppers are fixedly connected at one end close to each other, and the two feed hoppers are communicated with each other, a connecting shaft is fixedly installed on the top of the connection between the two feed hoppers, the top of the connecting shaft is fixedly connected to the bottom of the cross plate, a discharge pipe is fixedly installed through the bottom of the connection between the two feed hoppers, the discharge pipe passes through the bottom plate and the separation tank and is rotatably connected to the bottom plate and the separation tank.

[0010] Preferably, a connecting plate is fixedly sleeved on the discharge pipe, and an open ring plate 1 is fixedly installed at both ends of the connecting plate. The two open ring plates 1 are respectively rotatably sleeved on the two filter cartridges 2, and the bottoms of the two open filter cartridges are respectively fixedly connected to the corresponding open ring plates 1.

[0011] A tris-(dimethylphenyl) phosphate manufacturing process is applicable to the above-mentioned tris-(dimethylphenyl) phosphate filtering device, including a high-level tank, a synthesis tower, a collection tank, a water ring vacuum unit, a neutralization tower, a distillation tank, a mixing tank, a filter and a finished product tank, including the following steps:

[0012] S1, using a high-level tank to mix xylenol and phosphorus oxychloride in a molar ratio of 3.5:1, fully stirring and heating to between 93-97 degrees Celsius (or using two nozzles to mix the two materials in a mist condition at a molar ratio of 3.5:1 when the two materials are stabilized at 93-97 degrees Celsius);

[0013] S2, pass the synthesis tower (vertical tower) composed of polyaluminium chloride (porous, the larger the surface area, the better) in a uniform amount, so that the mist material stays in the synthesis tower for 4 hours and enters the collection tank. There are three collection tanks (2000 liters each). When the material is collected to 1500 liters, use another collection tank, heat the collected material to 140 degrees Celsius, turn on the water ring vacuum unit, and exhaust the negative pressure to the acid value of 5-7mg (KOH) / g. Open the neutralization tower (the material filled in the neutralization tower is mainly NaOH or sodium bicarbonate) gate for neutralization. The material should stay in the neutralization tower for two hours. The central control detects the acid value of the material. When the acid value of the material reaches below 4mg (KOH) / g, enter the next process;

[0014] S3, after testing the qualified materials, filter the salt in the materials in the filtering device, and pump the filtered materials into the distillation tank with an effective volume of 3000 liters. When the materials are collected to 2500-3000 liters, turn on the distillation vacuum pump on the distillation tank to evacuate the inside;

[0015] S4, heating the collected material in a distillation tank for vacuum distillation, collecting excess phenolic raw materials when the material temperature reaches 140 degrees Celsius, collecting semi-finished products when the material temperature reaches 170 degrees Celsius, and collecting finished products when the material temperature reaches 240 degrees Celsius and the acid value of the material is 2 mg (KOH) / g;

[0016] S5, the collected finished products are pumped into the mixing tank per ton, and then 30kg of bentonite is added. After stirring for 2 hours at 80-90 degrees Celsius, it is filtered with a 5-micron filter cartridge. After the filtration is completed, antioxidants are added and filtered again. When the particle contamination of the finished product is less than SAE AS4059F level 6, the finished product is put into the finished product tank and waits for packaging.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can accelerate the separation of salt solution in the material through the centrifugal method of the filter cartridge 1 and the extrusion method of the two filter cartridges 2. In addition, the multiple spiral scrapers rotating on the filter cartridge 2 can break up the material after the extrusion of the filter cartridge 1 and the filter cartridge 2, which is beneficial for the next extrusion;

[0019] 2. By changing the rotation direction of multiple spiral scrapers, the material can be transported between the second filter cartridge and the open filter cartridge and transported upward, and then the material after the salt solution is separated can be discharged to the separation tank through the discharge mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a schematic diagram of the overall structure of a tris-(dimethylphenyl) phosphate filtration device proposed by the present invention;

[0021] Figure 2 A partial side section of a tris-(dimethylphenyl) phosphate filtration device proposed by the present invention Figure 1 ;

[0022] Figure 3 A partial side section of a tris-(dimethylphenyl) phosphate filtration device proposed by the present invention Figure 2 ;

[0023] Figure 4 This is a schematic structural diagram of an extrusion discharge assembly in a tris-(dimethylphenyl) phosphate filtration device proposed by the present invention;

[0024] Figure 5 This is a schematic structural diagram of a discharge mechanism in a tris-(dimethylphenyl) phosphate filtration device proposed by the present invention;

[0025] Figure 6 The present invention provides a flow chart of a process for producing tris-(dimethylphenyl) phosphate.

[0026] In the figure: 1, base; 2, separation tank; 21, tank cover; 22, ring frame; 23, feed hopper; 24, drain pipe; 3, filter cartridge 1; 31, bottom plate; 4, drive mechanism; 41, outer gear ring; 42, gear 1; 43, motor 1; 5, extrusion discharge assembly; 51, horizontal plate; 52, transmission shaft; 53, motor 2; 54, rotating column; 55, circular plate; 56, filter cartridge 2; 57, open filter cartridge; 58, screw Scraping sheet; 59, discharging mechanism; 591, feeding hopper; 592, discharging pipe; 593, connecting plate; 594, open ring plate one; 595, connecting shaft; 510, gear two; 511, inner ring gear; 512, open ring plate two; 6, high-level tank; 7, synthesis tower; 8, collecting tank; 9, water ring vacuum unit; 10, neutralization tower; 11, distillation tank; 12, mixing tank; 13, filter; 14, finished product tank. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0028] Please refer to Figure 1-Figure 6The present invention provides a technical solution: a tri-(dimethylphenyl) phosphate filtering device, comprising a base 1, a separation tank 2 is fixedly installed on the top of the base 1, a tank cover 21 is installed on the top of the separation tank 2, an annular frame 22 is fixedly installed on the inner side of the tank cover 21, a filter cartridge 3 is rotatably installed on the inner side of the annular frame 22, a bottom plate 31 is fixedly installed on the bottom of the filter cartridge 3, a driving mechanism 4 for driving the filter cartridge 3 and the bottom plate 31 to rotate is provided below the bottom plate 31, and an extrusion discharge group is provided on the inner side of the filter cartridge 3 Part 5, the extrusion discharge component 5 includes two filter cartridges 56 that rotate around the axis of the filter cartridge 1 3 and rotate on their own. The bottom of the filter cartridge 56 is slidably connected to the bottom plate 31. The outer side of the filter cartridge 56 is provided with an open filter cartridge 57 that rotates around the axis of the filter cartridge 1 3. The outer side of the filter cartridge 56 is provided with a plurality of spiral scrapers 58 distributed in a circular array. The plurality of spiral scrapers 58 are slidably connected to the filter cartridge 1 3 and the inner side of the open filter cartridge 57. A discharge mechanism 59 for discharging materials is provided between the two open filter cartridges 57.

[0029] A feed hopper 23 is fixedly installed on the top of the tank cover 21, and the driving mechanism 4 includes a motor 43 fixedly installed on the bottom of the separation tank 2 and an outer gear ring 41 fixedly installed on the bottom of the base plate 31, and a gear 42 is meshedly connected to the outer gear ring 41. The output shaft of the motor 43 rotates and extends into the separation tank 2 and is fixedly connected to the gear 42. A drain pipe 24 is also fixedly installed on the bottom of the separation tank 2.

[0030] The extrusion discharge assembly 5 also includes a transmission shaft 52 that passes through the tank cover 21 and is rotatably connected to the tank cover 21. A horizontal plate 51 is fixedly installed at the bottom end of the transmission shaft 52. Two rotating columns 54 are rotatably installed on the horizontal plate 51. A circular plate 55 is fixedly installed at the bottom end of the two rotating columns 54. The two circular plates 55 are respectively fixedly connected to the inner walls of the corresponding filter cartridges 2 56. The extrusion discharge assembly 5 also includes a motor 2 53 fixedly installed on the top of the tank cover 21. The output shaft of the motor 2 53 is fixedly connected to the top of the transmission shaft 52.

[0031] Furthermore, by providing the circular plate 55, the material put into the filter cartridge 1 3 from the feed hopper 23 can be prevented from falling into the filter cartridge 2 56.

[0032] The two rotating columns 54 are both fixedly sleeved with a second gear 510 , and the two second gears 510 are meshedly connected with the same inner gear ring 511 , and the top of the inner gear ring 511 is fixedly connected to the bottom of the tank cover 21 .

[0033] An open ring plate 512 is fixedly installed on the inner side of the open filter cartridge 57. The open ring plate 512 is rotatably sleeved on the filter cartridge 56. Both ends of the open ring plate 512 are flush with both sides of the open filter cartridge 57, and the top of the open ring plate 512 is flush with the filter cartridge 56 and the top of the open filter cartridge 57.

[0034] Furthermore, by providing the second open ring plate 512 , the material between the second filter cartridge 56 and the open filter cartridge 57 can be prevented from being discharged from above, thereby ensuring that the material can enter the feed hopper 591 or be directly discharged from the opening of the open filter cartridge 57 .

[0035] The discharge mechanism 59 includes two feed hoppers 591 that pass through two open filter cartridges 57 and are fixedly connected to the two open filter cartridges 57. The two feed hoppers 591 are fixedly connected at one end close to each other, and the two feed hoppers 591 are connected to each other. A connecting shaft 595 is fixedly installed on the top of the connection between the two feed hoppers 591. The top of the connecting shaft 595 is fixedly connected to the bottom of the cross plate 51. A discharge pipe 592 is fixedly installed on the bottom of the connection between the two feed hoppers 591. The discharge pipe 592 passes through the bottom plate 31 and the separation tank 2 and is rotatably connected to the bottom plate 31 and the separation tank 2.

[0036] A connecting plate 593 is fixedly sleeved on the discharge pipe 592, and open ring plates 594 are fixedly installed at both ends of the connecting plate 593. The two open ring plates 594 are rotatably sleeved on the two filter cartridges 56, and the bottoms of the two open filter cartridges 57 are fixedly connected to the corresponding open ring plates 594.

[0037] A tris-(dimethylphenyl) phosphate manufacturing process is applicable to the above-mentioned tris-(dimethylphenyl) phosphate filtering device, including a high-level tank 6, a synthesis tower 7, a collection tank 8, a water ring vacuum unit 9, a neutralization tower 10, a distillation tank 11, a mixing tank 12, a filter 13 and a finished product tank 14, including the following steps:

[0038] S1, using a high-level tank 6 to mix xylenol and phosphorus oxychloride in a molar ratio of 3.5:1, fully stirring and heating to between 93-97 degrees Celsius (or using two nozzles to mix the two materials in a mist condition at a molar ratio of 3.5:1 when the two materials are stabilized at 93-97 degrees Celsius);

[0039] S2, pass the synthesis tower 7 (vertical tower) composed of polyaluminium chloride (porous, the larger the surface area, the better) in a uniform amount, so that the mist material stays in the synthesis tower 7 for 4 hours and enters the collection tank 8. There are three collection tanks 8 (2000 liters each). When the material is collected to 1500 liters, use another collection tank 8, heat the collected material to 140 degrees Celsius, open the water ring vacuum unit 9, and exhaust the negative pressure to the acid value of 5-7mg (KOH) / g. Open the gate of the neutralization tower 10 (the material filled in the neutralization tower 10 is mainly NaOH or sodium bicarbonate) for neutralization. The material stays in the neutralization tower 10 for two hours. The central control detects the acid value of the material. When the acid value of the material reaches 4mg (KOH) / g or less, enter the next process;

[0040] S3, after testing the qualified materials, filter the salt in the materials in the filtering device, and pump the filtered materials into the distillation tank 11, the effective volume of the distillation tank 11 is 3000 liters, when the materials are collected to 2500-3000 liters, turn on the distillation vacuum pump on the distillation tank 11 to evacuate the inside;

[0041] S4, heating the collected material in a distillation tank 11 for vacuum distillation, collecting excess phenolic raw materials when the material temperature reaches 140 degrees Celsius, collecting semi-finished products when the material temperature reaches 170 degrees Celsius, and collecting finished products when the material temperature reaches 240 degrees Celsius and the acid value of the material is 2 mg (KOH) / g;

[0042] S5, the collected finished products are pumped into the mixing tank 12 in units of one ton, and then 30 kg of bentonite is added. After stirring for 2 hours at 80-90 degrees Celsius, the finished products are filtered with a 5-micron filter cartridge filter 13. After the filtration is completed, an antioxidant is added, and the finished products are filtered again. When the particle contamination of the finished products is less than SAE AS4059F level 6, the finished products are pumped into the finished product tank 14 and wait for packaging.

[0043] Furthermore, the above steps S1-S5 need to be carried out under a slightly negative pressure (-500Pa).

[0044] In this embodiment: when desalting the material, the material discharged from the neutralization tower 10 is first put into the filter cartridge 3 through the feed hopper 23, and then the motor 43 is started to drive the gear 42 to rotate, and the gear 42 then drives the bottom plate 31 to rotate through the outer gear ring 41, and the bottom plate 31 then drives the filter cartridge 3 to rotate. Under the action of centrifugal force, the material in the filter cartridge 3 will first cling to the inner wall of the filter cartridge 3, and then the salt solution in the material will be thrown out through the holes on the side wall of the filter cartridge 3, and the thrown salt solution will fall on the inner wall of the separation tank 2 and then be discharged from the drain pipe 24;

[0045] While the filter cartridge 1 3 is rotating, the starter motor 2 53 drives the transmission shaft 52 to rotate, and the transmission shaft 52 drives the horizontal plate 51 to drive the two rotating columns 54 to revolve around the transmission shaft 52, and the two rotating columns 54 drive the two filter cartridges 2 56 to revolve around the transmission shaft 52 through the two circular plates 55;

[0046] When the two filter cartridges 56 revolve around the transmission shaft 52, the two gears 510 revolve around the inner gear ring 511 and rotate counterclockwise. The two gears 510 then drive the two filter cartridges 56 to rotate counterclockwise through the corresponding rotating column 54 and the circular plate 55. Therefore, when the two filter cartridges 56 revolve around the transmission shaft 52 and rotate counterclockwise, the two filter cartridges 56 will squeeze the material attached to the inner wall of the filter cartridge 1 3. Under the squeezing of the two filter cartridges 56, the separation of the salt solution in the material can be accelerated.

[0047] like Figure 3 and Figure 4 As shown, when the filter cartridge 2 56 rotates counterclockwise, the plurality of spiral scrapers 58 can scrape down the material squeezed by the inner wall of the filter cartridge 1 3 and the outer wall of the filter cartridge 2 56, and the position of the scraped material can be changed during the falling process, so that the other filter cartridge 2 56 can squeeze it again;

[0048] After the salt solution in the material is separated, the motor 2 53 is reversed so that the two gears 2 510 will revolve around the inner gear ring 511 and rotate clockwise. Figure 3 and Figure 4 As shown, during the clockwise rotation of the multiple spiral scrapers 58, the multiple spiral scrapers 58 can scrape the materials attached to the inner wall of the filter cartridge 1 3 upwards and transport the materials upwards. The materials transported upwards will be carried by the spiral scrapers 58 into between the filter cartridge 2 56 and the open filter cartridge 57, and will be squeezed again by the filter cartridge 2 56 and the open filter cartridge 57 to squeeze out the salt solution in the materials again.

[0049] When the rotating spiral scraper 58 carries the material between the material filter cartridge 2 56 and the open filter cartridge 57 through the inlet hopper 591, the material will enter the inlet hopper 591 and fall into the discharge pipe 592 and finally be discharged from the bottom opening of the discharge pipe 592. After that, the material discharged from the bottom end of the discharge pipe 592 can be transported into the distillation tank 11.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tris-(dimethylphenyl) phosphate filtration device, comprising a base (1), characterized in that: A separation tank (2) is fixedly mounted on the top of the base (1), a tank cover (21) is mounted on the top of the separation tank (2), an annular frame (22) is fixedly mounted on the inner side of the tank cover (21), a filter cartridge (3) is rotatably mounted on the inner side of the annular frame (22), a bottom plate (31) is fixedly mounted on the bottom of the filter cartridge (3), a driving mechanism (4) for driving the filter cartridge (3) and the bottom plate (31) to rotate is provided below the bottom plate (31), an extrusion discharge assembly (5) is provided on the inner side of the filter cartridge (3), and the extrusion discharge assembly (5) includes The invention comprises two filter cartridges (56) which rotate and self-rotate around the axis of the filter cartridge (3), the bottom of the filter cartridge (56) being slidably connected to the bottom plate (31), the outer side of the filter cartridge (56) being sleeved with an open filter cartridge (57) which rotates around the axis of the filter cartridge (3), the outer side of the filter cartridge (56) being sleeved with a plurality of spiral scraping blades (58) distributed in a circular array, the plurality of spiral scraping blades (58) being slidably connected to the filter cartridge (3) and the inner side of the open filter cartridge (57), and a discharge mechanism (59) for discharging material being provided between the two open filter cartridges (57).

2. A tris-(dimethylphenyl) phosphate filtration device according to claim 1, characterized in that: A feed hopper (23) is fixedly installed through the top of the tank cover (21), and the drive mechanism (4) comprises a motor 1 (43) fixedly installed at the bottom of the separation tank (2) and an outer gear ring (41) fixedly installed at the bottom of the bottom plate (31), and a gear 1 (42) is meshingly connected to the outer gear ring (41), and an output shaft of the motor 1 (43) is rotatably extended into the separation tank (2) and is fixedly connected to the gear 1 (42), and a drain pipe (24) is also fixedly installed through the bottom of the separation tank (2).

3. A tris-(dimethylphenyl) phosphate filtration device according to claim 1, characterized in that: The extrusion discharge assembly (5) further comprises a transmission shaft (52) penetrating the tank cover (21) and rotatably connected to the tank cover (21); a horizontal plate (51) is fixedly mounted on the bottom end of the transmission shaft (52); two rotating columns (54) are rotatably mounted through the horizontal plate (51); a circular plate (55) is fixedly mounted on the bottom end of the two rotating columns (54); the two circular plates (55) are respectively fixedly connected to the inner wall of the corresponding filter cartridge 2 (56); the extrusion discharge assembly (5) further comprises a second motor (53) fixedly mounted on the top of the tank cover (21); the output shaft of the second motor (53) is fixedly connected to the top end of the transmission shaft (52).

4. A tris-(dimethylphenyl) phosphate filtration device according to claim 3, characterized in that: Gear 2 (510) is fixedly sleeved on the two rotating columns (54), and the two gears 2 (510) are meshingly connected with the same inner gear ring (511), and the top of the inner gear ring (511) is fixedly connected to the bottom of the tank cover (21).

5. A tris-(dimethylphenyl) phosphate filtration device according to claim 1, characterized in that: An open ring plate 2 (512) is fixedly mounted on the inner side of the open filter cartridge (57); the open ring plate 2 (512) is rotatably sleeved on the filter cartridge 2 (56); the two ends of the open ring plate 2 (512) are flush with the two sides of the open filter cartridge (57); and the top of the open ring plate 2 (512) is flush with the filter cartridge 2 (56) and the top of the open filter cartridge (57).

6. A tris-(dimethylphenyl) phosphate filtration device according to claim 1, characterized in that: The discharge mechanism (59) comprises two feed hoppers (591) that penetrate the two open filter cartridges (57) and are fixedly connected to the two open filter cartridges (57); the two feed hoppers (591) are fixedly connected at one end close to each other, and the two feed hoppers (591) are connected to each other; a connecting shaft (595) is fixedly installed at the top of the connection between the two feed hoppers (591); the top of the connecting shaft (595) is fixedly connected to the bottom of the horizontal plate (51); a discharge pipe (592) is fixedly installed at the bottom of the connection between the two feed hoppers (591); the discharge pipe (592) penetrates the bottom plate (31) and the separation tank (2) and is rotatably connected to the bottom plate (31) and the separation tank (2).

7. A tris-(dimethylphenyl) phosphate filtration device according to claim 6, characterized in that: A connecting plate (593) is fixedly sleeved on the discharge pipe (592), and open ring plates (594) are fixedly mounted on both ends of the connecting plate (593). The two open ring plates (594) are rotatably sleeved on the two filter cartridges (56), and the bottoms of the two open filter cartridges (57) are fixedly connected to the corresponding open ring plates (594).

8. A process for manufacturing tris-(dimethylphenyl) phosphate, applicable to a tris-(dimethylphenyl) phosphate filtering device as claimed in claim 1, comprising a high-level tank (6), a synthesis tower (7), a collection tank (8), a water ring vacuum unit (9), a neutralization tower (10), a distillation tank (11), a mixing tank (12), a filter (13) and a finished product tank (14), characterized in that: The following steps are involved: S1, using a high-level tank (6), xylenol and phosphorus oxychloride are mixed at a molar ratio of 3.5:1, stirred thoroughly and heated to between 93 and 97 degrees Celsius; S2, passing the mist material through a synthesis tower (7) composed of polyaluminium chloride in a uniform amount, so that the mist material stays in the synthesis tower (7) for 4 hours and enters a collection tank (8), the number of collection tanks (8) is three, when the material is collected to 1500 liters, another collection tank (8) is used, the collected material is heated to 140 degrees Celsius, the water ring vacuum unit (9) is turned on, and the negative pressure exhaust is performed until the acid value reaches 5-7 mg (KOH) / g, and the neutralization tower (10) gate is opened for neutralization, and the material stays in the neutralization tower (10) for two hours. The central control detects the acid value of the material. When the acid value of the material reaches 4 mg (KOH) / g or less, it enters the next process; S3, testing qualified materials, filtering salts in the materials in the filtering device, and pumping the filtered materials into the distillation tank (11). After the materials are collected, turning on the distillation vacuum pump on the distillation tank (11) to evacuate the interior of the distillation tank; S4, heating the collected material in a distillation tank (11) for vacuum distillation, collecting excess phenolic raw materials when the material temperature reaches 140 degrees Celsius, collecting semi-finished products when the material temperature reaches 170 degrees Celsius, and collecting finished products when the material temperature reaches 240 degrees Celsius and the acid value of the material is 2 mg (KOH) / g; S5, the collected finished products are pumped into a mixing tank (12) per ton, and then 30 kg of bentonite is added. After stirring for 2 hours at 80-90 degrees Celsius, it is filtered with a 5-micron filter cartridge (13). After the filtration is completed, an antioxidant is added and filtered again. When the particle contamination of the finished product is less than SAE AS4059F level 6, the finished product is pumped into a finished product tank (14) and waits for packaging.

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