CN214232864U

CN214232864U - Filter device for post-treatment of 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl

Info

Publication number: CN214232864U
Application number: CN202023227218.0U
Authority: CN
Inventors: 汪静莉; 严春雷; 浦艳文
Original assignee: Suli Pharmaceutical Technology Jiangyin Co ltd
Current assignee: Suli Pharmaceutical Technology Jiangyin Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-09-21
Anticipated expiration: 2030-12-29

Abstract

The utility model relates to a filtering device for post-treatment of 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl, which comprises a reaction kettle, wherein the reaction kettle is connected with a nitrogen pressure filter, the reaction kettle and the nitrogen pressure filter are respectively connected with a nitrogen storage tank through a regulating valve, and the nitrogen pressure filter is also connected with a receiving storage tank; the nitrogen filter press is provided with a microcrystalline cellulose layer along the horizontal direction. The utility model discloses a 2,2 '-two (trifluoromethyl) -4,4' -diaminobiphenyl for aftertreatment filter equipment adsorption efficiency is high, the processing time is short, avoid conventional filter equipment easily to be blockked up by tar, avoid conventional filter equipment easily to produce oxidation impurity simultaneously, and the material after the absorption need not the centrifugation, and production efficiency is high, metal catalyst recycle after the absorption.

Description

Filter device for post-treatment of 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl

Technical Field

The utility model belongs to the technical field of fine chemical industry, concretely relates to 2,2 '-two (trifluoromethyl) -4,4' -diaminobiphenyl filter equipment for aftertreatment.

Background

The 2,2' -bis (trifluoromethyl) diaminobiphenyl (TFMB) is mainly applied to the fields of microelectronics and optoelectronics and is used for preparing a screen material with extremely low dielectric constant, extremely low surface free energy, extremely high mechanical strength, extremely high wear resistance, and colorless transparency. At present, the polyimide is mainly used for producing flexible OLEDs, fluorine groups are introduced into the polyimide synthesized by taking TFMB as a monomer, and fluorine has a small atomic radius and high electronegativity, so that the polyimide has a plurality of unique properties such as thermal stability, chemical inertness, excellent mechanical properties and the like while maintaining excellent comprehensive properties.

2,2' -bis (trifluoromethyl) diaminobiphenyl is generally obtained by the following steps: a) synthesis of intermediate a1 from nitrobenzotrifluoride; b) 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl was synthesized from intermediate A1. But the production process has strict requirements on reaction conditions, and also generates a large amount of diatomite containing heavy metal wastewater and tar substances, and the traditional post-treatment filtration process has the following defects:

1) the filter is easy to be blocked by brown tar substances generated in the reaction process.

2) The traditional filtering device is long in time and large in energy consumption.

3) The filtering process is easy to be oxidized, and the yield is reduced.

4) The heavy metal catalyst is difficult to recover.

Disclosure of Invention

The utility model aims at providing a 2,2 '-two (trifluoromethyl) -4,4' -diaminobiphenyl filter equipment for aftertreatment, adsorption efficiency is high, the processing time is short, avoid conventional filter equipment easily to be blockked up by tar, avoid conventional filter equipment easily to produce oxidation impurity simultaneously, and the material after the absorption need not the centrifugation, and production efficiency is high, metal catalyst recycle after the absorption.

The utility model provides a technical scheme that above-mentioned problem adopted does: a filtering device for post-treatment of 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl comprises a reaction kettle, wherein the reaction kettle is connected with a nitrogen pressure filter, the reaction kettle and the nitrogen pressure filter are respectively connected with a nitrogen storage tank through regulating valves, and the nitrogen pressure filter is also connected with a receiving storage tank; the nitrogen filter press is provided with a microcrystalline cellulose layer along the horizontal direction.

Preferably, the reaction kettle is connected with the nitrogen pressure filter sequentially through a first discharge valve and a first feed valve.

Preferably, the reaction kettle is connected with the nitrogen storage tank through a first air inlet valve and the regulating valve in sequence.

Preferably, the nitrogen pressure filter is connected with the nitrogen storage tank through a second air inlet valve and the regulating valve in sequence.

Preferably, the nitrogen pressure filter is connected with the receiving storage tank through a second discharge valve and a second feeding valve in sequence.

Preferably, the height of the microcrystalline cellulose layer is 1/20 the height of the nitrogen filter press.

Preferably, the receiving storage tank is connected with the reaction kettle sequentially through a third discharge valve and the first feed valve.

Compared with the prior art, the utility model has the advantages of:

(1) the utility model discloses replace the filter equipment among the original prior art with nitrogen gas pressure filter, the utility model discloses be equipped with the microcrystalline cellulose layer in the nitrogen gas pressure filter, and nitrogen gas storage tank connects nitrogen gas pressure filter and reation kettle respectively, make 2 after the reaction, 2 '-two (trifluoromethyl) -4,4' -diaminobiphenyl mixed material adsorbs metal catalyst and organic tar impurity in the reaction material through the microcrystalline cellulose layer under nitrogen gas atmosphere, adsorption efficiency is high, the processing time is short, avoid the easy tar of conventional filter equipment to block up, avoid conventional filter equipment to produce oxidation impurity simultaneously, and the material after the absorption need not the centrifugation, high production efficiency, but metal catalyst recycle after the absorption.

(2) The utility model discloses receive the storage tank and constitute circulation structure with nitrogen gas filter-press, improved adsorption efficiency greatly, contain metal catalyst and organic tar impurity in the material after avoiding filtering.

Drawings

FIG. 1 is a schematic structural view of a filtration apparatus for post-treatment of 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl in an embodiment of the present invention.

Wherein: 1 is the reation kettle, 2 is the nitrogen gas pressure filter, 2.1 is microcrystalline cellulose layer, 3 is the governing valve, 4 is the nitrogen gas storage tank, 5 is for receiving the storage tank, 6.1 is first bleeder valve, 6.2 is the second bleeder valve, 6.3 is the third bleeder valve, 7.1 is first feed valve, 7.2 is the second feed valve, 8.1 is first admission valve, 8.2 is the second admission valve.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1, the filter device for post-treatment of 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl in this example has a schematic structure.

A2, 2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl post-treatment filter device comprises a reaction kettle 1, wherein the reaction kettle 1 is sequentially connected with a nitrogen pressure filter 2 through a first discharge valve 6.1 and a first feed valve 7.1, the reaction kettle 1 is sequentially connected with a nitrogen storage tank 4 through a first air inlet valve 8.1 and a regulating valve 3, the nitrogen pressure filter 2 is sequentially connected with the nitrogen storage tank 4 through a second air inlet valve 8.1 and the regulating valve 3, the nitrogen pressure filter 2 is sequentially connected with a receiving storage tank 5 through a second discharge valve 6.2 and a second feed valve 7.2, and the receiving storage tank 5 is further sequentially connected with the reaction kettle 1 through a third discharge valve 6.3 and the first feed valve 7.1; the nitrogen gas filter press 2 is provided with a microcrystalline cellulose layer 2-1 in the horizontal direction, and the height of the microcrystalline cellulose layer 2.1 is 1/20 of the height of the nitrogen gas filter press 2.

The operation of this embodiment is described in detail below with reference to the accompanying drawings:

opening a first feeding valve 7.1 and a regulating valve 3, opening a first air inlet valve 8.1, opening a first discharging valve 6.1 under the protection of nitrogen, adding the reacted 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl material into a nitrogen filter press 2 in batches, feeding each batch of the reacted 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl material to the 2/3 liquid level of the nitrogen filter press 2, closing the first discharging valve 6.1 and the first feeding valve 7.1, then opening a second air inlet valve 8.2, regulating the nitrogen flow through controlling the regulating valve 3 to ensure that a system keeps a certain positive pressure state, allowing the reacted 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl material to pass through a microcrystalline cellulose layer 2.1 to adsorb metal catalysts and organic tar impurities in the reaction material, then opening a second discharging valve 6.2 and the second feeding valve 7.2 to transfer the adsorbed material into a receiving storage tank 5, if the adsorption is not complete, the material in the receiving storage tank 5 enters the nitrogen pressure filter 2 again through the third discharge valve 6.3 for adsorption until the material is qualified.

In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A filter device for post-treatment of 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl, characterized in that: the device comprises a reaction kettle (1), wherein the reaction kettle (1) is connected with a nitrogen pressure filter (2), the reaction kettle (1) and the nitrogen pressure filter (2) are respectively connected with a nitrogen storage tank (4) through a regulating valve (3), and the nitrogen pressure filter (2) is also connected with a receiving storage tank (5); the nitrogen filter press (2) is provided with a microcrystalline cellulose layer (2.1) along the horizontal direction.

2. The filtration device for post-treatment of 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl according to claim 1, characterized in that: the reaction kettle (1) is connected with the nitrogen pressure filter (2) through a first discharge valve (6.1) and a first feed valve (7.1) in sequence.

3. The filtration device for post-treatment of 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl according to claim 1, characterized in that: the reaction kettle (1) is sequentially connected with the nitrogen storage tank (4) through the second air inlet valve (8.1) and the regulating valve (3).

4. The filtration device for post-treatment of 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl according to claim 1, characterized in that: the nitrogen filter press (2) is sequentially connected with the nitrogen storage tank (4) through a second air inlet valve (8.2) and the regulating valve (3).

5. The filtration device for post-treatment of 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl according to claim 1, characterized in that: the nitrogen filter press (2) is connected with the receiving storage tank (5) through a second discharge valve (6.2) and a second feeding valve (7.2) in sequence.

6. The filtration device for post-treatment of 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl according to claim 1, characterized in that: the height of the microcrystalline cellulose layer (2.1) is 1/20 of the height of the nitrogen filter press (2).

7. The filtration device for post-treatment of 2,2 '-bis (trifluoromethyl) -4,4' -diaminobiphenyl according to claim 1, characterized in that: the receiving storage tank (5) is also sequentially connected with the reaction kettle (1) through a third discharge valve (6.3) and the first feed valve (7.1).