Special filtering device for triphenyl phosphite

Abstract

The utility model discloses a special filtering device for triphenyl phosphite, which comprises a filter body, a stirring mechanism is fixedly connected in the filter body, a filter aid is filled at the bottom in the filter body, quick lime is added in the filter aid, and the stirring mechanism is fixedly connected with the stirring mechanism. The outer wall of the filter body is fixedly connected with a circulating assembly through a hoop connected in a sleeved mode, and a plurality of supporting legs are fixedly connected to the position, close to the bottom, of the outer wall of the filter body in the circumferential direction at equal intervals. According to the utility model, the quick lime is added into the original filter aid, the quick lime is an alkaline substance and can neutralize acidic substances in the triphenyl phosphite, the resultant is phosphite and water, the phosphite is an insoluble solid and can be directly filtered out in the process, and the water can be directly absorbed by the quick lime, so that the filter efficiency is improved. And residual raw material phenol can be salified and separated out in a strong alkali environment and directly filtered out, so that the production efficiency of the whole process is improved, and meanwhile, the problems of yellowing and peculiar smell of a finished product caused by high-temperature distillation are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of the production and application of triphenyl phosphite, in particular to a special filtering device for triphenyl phosphite. Background Technique

[0002] Triphenyl phosphite acts as a chelating agent and antioxidant in plastic manufacturing, especially suitable for polyvinyl chloride (PVC) products. It can be used in combination with metal soaps to reduce the harm of metal chlorides, maintain the transparency of products and inhibit color change.

[0003] The original production process of triphenyl phosphite includes three processes: esterification - deacidification - distillation. Among them, esterification and deacidification are two essential processes. The purpose of distillation is to remove acidic impurities and residual raw material phenol in the crude triphenyl phosphite. The disadvantages generated during the production process are as follows: 1. The distillation time is long, which drags down the production efficiency; 2. The distillation temperature is relatively high, and the triphenyl phosphite product will decompose under long - term conditions, resulting in two problems: yellowing of color and peculiar smell of the finished product. Therefore, the utility model proposes a special filtering device for triphenyl phosphite. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a special filtering device for triphenyl phosphite. By adding quicklime to the original filter aid, quicklime is an alkaline substance, which can neutralize the acidic substances in triphenyl phosphite. The products are phosphite and water. Phosphite is an insoluble solid and can be directly filtered out in this process. Water can be directly absorbed by quicklime, and the residual raw material phenol can also form salts and precipitate out under the strong - alkali environment and be directly filtered out, improving the production efficiency of the whole process and avoiding the problems of yellowing of color and peculiar smell of the finished product caused by high - temperature distillation.

[0005] To solve the above - mentioned technical problem, a technical solution adopted by the utility model is: to provide a special filtering device for triphenyl phosphite, including a filter body, an agitation mechanism is fixedly connected inside the filter body, filter aid is filled at the inner bottom of the filter body, quicklime is added inside the filter aid, and a circulation component is fixedly connected to the outer wall of the filter body through a sleeved hoop.

[0006] The utility model is further arranged as: a plurality of support legs are fixedly connected to the outer wall of the filter body at an equal distance circumferentially near the bottom position.

[0007] Through the above - mentioned technical solution, it is convenient to use the support legs to position and fix the whole filter body.

[0008] The present utility model is further configured as follows: The stirring mechanism includes a stirring motor fixedly connected to the top of the filter body. The end face of the driving shaft of the stirring motor is fixedly connected with a rotating shaft. A plurality of stirring rods are fixedly connected to the outer wall of the rotating shaft at equal circumferential intervals near the bottom, and are placed inside the filter aid.

[0009] Through the above technical solution, when the stirring motor is started, the driving shaft rotates to drive the plurality of stirring rods on the rotating shaft, thereby stirring the filter aid, so that the incoming triphenyl phosphite is quickly neutralized and filtered with the filter aid and quicklime, improving the filtering efficiency of triphenyl phosphite.

[0010] The present utility model is further configured as follows: The circulation component includes a pump body. The end face of the pump body is symmetrically fixedly connected with circulation ducts. The top of the circulation duct is fixedly connected with a feed pipe, and the bottom of the circulation duct is fixedly connected with a discharge pipe.

[0011] Through the above technical solution, the pump body is used to transfer the triphenyl phosphite filtered inside from the discharge pipe to the inside of the feed pipe, and then enter the filter body again.

[0012] The present utility model is further configured as follows: The outer wall of the pump body near the end face is respectively placed inside the connecting sleeve provided on the end face of the hoop, and the outer wall of the hoop is tightened against the outer wall of the filter body through the bolts arranged therethrough.

[0013] Through the above technical solution, when installing the pump body, it is convenient to fix it with the connecting sleeve and fix it on the outer wall of the filter body through the hoop.

[0014] The present utility model is further configured as follows: One end of the feed pipe is fixedly connected to the outer wall of the filter body and is in communication with it. A valve A away from the circulation duct is fixedly connected to the top of the feed pipe near the port.

[0015] Through the above technical solution, it is convenient to put the triphenyl phosphite to be filtered into the filter body from the feed pipe, and it is convenient for the circulation duct to put the triphenyl phosphite filtered multiple times into the filter body from the feed pipe again during the circulation filtration.

[0016] The present utility model is further configured as follows: One end of the discharge pipe is fixedly connected to the outer wall of the filter body and is in communication with it. A valve B away from the circulation duct is fixedly connected to the top of the discharge pipe near the port.

[0017] Through the above technical solution, it is convenient to discharge the triphenyl phosphite after multiple neutralization filtrations from the discharge pipe, and the valve B can be used to close the discharge pipe during the circulation filtration.

[0018] The beneficial effects of the present utility model are as follows:

[0019] A special filtering device for triphenyl phosphite proposed by the present utility model adds quicklime to the original filter aid. Quicklime is an alkaline substance that can neutralize the acidic substances in triphenyl phosphite. The reaction products are phosphite and water. Phosphite is an insoluble solid and can be directly filtered out in this process. Water can be directly absorbed by quicklime, and the residual raw material phenol can also form salts and precipitate out under the strong alkaline environment and be directly filtered out, improving the production efficiency of the entire process and avoiding the problems of color yellowing and off-flavor of the finished product caused by high-temperature distillation. Description of the Drawings

[0020] Figure 1 It is a structural diagram of a special filtering device for triphenyl phosphite of the present utility model;

[0021] Figure 2 It is a sectional structural diagram of a special filtering device for triphenyl phosphite of the present utility model;

[0022] Figure 3 It is a structural diagram of the hoop in a special filtering device for triphenyl phosphite of the present utility model;

[0023] Figure 4 It is a schematic diagram of the working principle of a special filtering device for triphenyl phosphite of the present utility model.

[0024] In the figure: 100, filter body; 101, support leg; 200, stirring mechanism; 201, stirring motor; 202, rotating shaft; 203, stirring rod; 300, filter aid; 301, quicklime; 400, circulation component; 401, pump body; 402, circulation conduit; 403, feed pipe; 4031, valve A; 404, discharge pipe; 4041, valve B; 500, hoop; 501, connecting ferrule. Detailed Embodiments

[0025] The following elaborates on the preferred embodiments of the present utility model in conjunction with the drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making the protection scope of the present utility model more clearly defined.

[0026] As Figures 1 - 4As shown in the figure, a special filtering device for triphenyl phosphite includes a filter body 100. A plurality of support legs 101 are fixedly connected to the outer wall of the filter body 100 at equal intervals in the circumferential direction near the bottom position, which facilitates the positioning and fixing of the entire filter body 100 using the support legs 101. A stirring mechanism 200 is fixedly connected inside the filter body 100. The stirring mechanism 200 includes a stirring motor 201 fixedly connected to the top of the filter body 100. The end face of the driving shaft of the stirring motor 201 is fixedly connected with a rotating shaft 202. A plurality of stirring rods 203 are fixedly connected to the outer wall of the rotating shaft 202 at equal intervals in the circumferential direction near the bottom position and are placed inside the filter aid 300. When the stirring motor 201 is started, its driving shaft rotates to drive the plurality of stirring rods 203 on the rotating shaft 202, thereby stirring the filter aid 300, enabling the incoming triphenyl phosphite to quickly neutralize and filter with the filter aid 300 and quicklime 301, and improving the filtering efficiency of triphenyl phosphite.

[0027] As Figure 2 shown, the inner bottom of the filter body 100 is filled with a filter aid 300, and quicklime 301 is added to the filter aid 300. A circulation component 400 is fixedly connected to the outer wall of the filter body 100 through a sleeved hoop 500. The circulation component 400 includes a pump body 401. The outer wall of the pump body 401 near the end face is respectively placed inside the connecting collar 501 provided on the end face of the hoop 500, and the outer wall of the hoop 500 is tightened against the outer wall of the filter body 100 through a bolt provided through it, which facilitates the installation of the pump body 401. The connecting collar 501 is used to fix it, and it is fixed on the outer wall of the filter body 100 through the hoop 500. The end face of the pump body 401 is symmetrically and fixedly connected with circulation ducts 402. The top of the circulation ducts 402 is fixedly connected with a feed pipe 403. One end of the feed pipe 403 is fixedly connected to the outer wall of the filter body 100 and is in communication with it. A valve A4031 away from the circulation duct 402 is fixedly connected to the top of the feed pipe 403 near the port position, which facilitates the triphenyl phosphite to be filtered to be put into the filter body 100 from the feed pipe 403, and in the circulating filtration, it is convenient for the circulation ducts 402 to put the triphenyl phosphite filtered multiple times into the filter body 100 from the feed pipe 403 again. The bottom of the circulation ducts 402 is fixedly connected with a discharge pipe 404. One end of the discharge pipe 404 is fixedly connected to the outer wall of the filter body 100 and is in communication with it. A valve B4041 away from the circulation duct 402 is fixedly connected to the top of the discharge pipe 404 near the port position, which facilitates the triphenyl phosphite after multiple neutralization filtrations to be discharged from the discharge pipe 404, and the valve B4041 can be used to close the discharge pipe 404 during the circulating filtration. The pump body 401 is used to transfer the triphenyl phosphite filtered inside from the discharge pipe 404 to the inside of the feed pipe 403, and then enter the filter body 100 again.

[0028] When the utility model is in use, first, the crude triphenyl phosphite is put into the interior of the filter body 100 from the feed pipe 403. Then, the stirring motor 201 is started, and the rotation of its drive shaft drives the plurality of stirring rods 203 on the rotating shaft 202, thereby stirring the filter aid 300, so that the incoming crude triphenyl phosphite is quickly neutralized and filtered with the filter aid 300 and quicklime 301, improving the filtration efficiency of the crude triphenyl phosphite. The filtered crude triphenyl phosphite is transferred to the interior of the feed pipe 403 from the discharge pipe 404 through the pump body 401, and thus enters the interior of the filter body 100 again. After the sample is clarified through multiple cycles, the valve B4041 is opened, and the finished product of triphenyl phosphite is discharged through the discharge pipe 404.

[0029] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A special filtering device for triphenyl phosphite, comprising a filter body (100), characterized in that: A stirring mechanism (200) is fixedly connected inside the filter body (100). Filter aid (300) is filled at the inner bottom of the filter body (100). Quicklime (301) is added inside the filter aid (300). A circulation assembly (400) is fixedly connected to the outer wall of the filter body (100) through a sleeved hoop (500).

2. The dedicated filtration device for triphenyl phosphite according to claim 1, characterized in that: A plurality of support legs (101) are fixedly connected to the outer wall of the filter body (100) at equal circumferential intervals near the bottom position.

3. The special filtering device for triphenyl phosphite according to claim 1, characterized in that: The stirring mechanism (200) includes a stirring motor (201) fixedly connected to the top of the filter body (100). A rotating shaft (202) is fixedly connected to the end face of the driving shaft of the stirring motor (201). A plurality of stirring rods (203) are fixedly connected to the outer wall of the rotating shaft (202) at equal circumferential intervals near the bottom position and are located inside the filter aid (300).

4. The dedicated filtration device for triphenyl phosphite according to claim 1, characterized in that: The circulation assembly (400) includes a pump body (401). Circulation ducts (402) are symmetrically fixedly connected to the end face of the pump body (401). A feed pipe (403) is fixedly connected to the top of the circulation duct (402). A discharge pipe (404) is fixedly connected to the bottom of the circulation duct (402).

5. The dedicated filtration device for triphenyl phosphite according to claim 4, characterized in that: The outer wall of the pump body (401) near the end face is respectively located inside a connecting collar (501) provided on the end face of the hoop (500), and the outer wall of the hoop (500) is tightened against the outer wall of the filter body (100) through a bolt provided therethrough.

6. The dedicated filtering device for triphenyl phosphite according to claim 4, characterized in that: One end of the feed pipe (403) is fixedly connected to the outer wall of the filter body (100) and is in communication therewith. A valve A (4031) away from the circulation duct (402) is fixedly connected to the top of the feed pipe (403) near the port.

7. The special filtering device for triphenyl phosphite according to claim 4, wherein: One end of the discharge pipe (404) is fixedly connected to the outer wall of the filter body (100) and is in communication therewith. A valve B (4041) away from the circulation duct (402) is fixedly connected to the top of the discharge pipe (404) near the port.

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