CN210826006U

CN210826006U - 1, 2-benzisothiazole-3-ketone crude processing apparatus

Info

Publication number: CN210826006U
Application number: CN201921957607.3U
Authority: CN
Inventors: 戴明本
Original assignee: Shouguang Syntech Fine Chemical Co ltd
Current assignee: Shouguang Syntech Fine Chemical Co ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-06-23
Anticipated expiration: 2029-11-13

Abstract

The utility model discloses a 1, 2-benzisothiazole-3-ketone crude product processing apparatus, which belongs to the technical field of 1, 2-benzisothiazole-3-ketone production, and comprises a distillation still, wherein the bottom of the distillation still is connected with a first centrifugal separator, a first washing kettle, a second centrifugal separator and a BIT collecting tank in sequence through a feed liquid pipeline, and the BIT collecting tank is connected with an alkali dissolving kettle through a BIT conveying pipeline; the alkali dissolving kettle is characterized in that the bottom of the alkali dissolving kettle is sequentially connected with an activated carbon filter, a titanium rod filter, a screen plate type sealing filter and a neutralizing kettle through a conveying pipeline, the top of the alkali dissolving kettle is further provided with an activated carbon bin, a liquid alkali input pipeline and a water input pipeline, and the top of the neutralizing kettle is provided with an acid liquid input pipeline. Firstly, azeotropic desolventizing is carried out on the BIT crude product, then adsorption impurity removal treatment is carried out on the BIT crude product, the solvent is recovered, and the purity and the quality of the BIT product are also ensured.

Description

1, 2-benzisothiazole-3-ketone crude processing apparatus

Technical Field

The utility model relates to a 1, 2-benzisothiazole-3-ketone (BIT) production technical field, concretely relates to 1, 2-benzisothiazole-3-ketone crude processing apparatus.

Background

In the production process of BIT, products are obtained after a series of reactions such as chlorination and the like, and the obtained products are washed with water and centrifuged to obtain crude BIT. Because the crude product of BIT contains a large amount of solvent, if the solvent is not removed, the product quality is influenced, and the solvent is wasted. In addition, the crude product of BIT also contains some impurities, which causes bad color and low purity of the product and influences the use of the product. Therefore, the crude product of BIT obtained by production needs to be treated to remove the solvent carried in the product and to remove impurities and decolorize the product.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model provides a 1, 2-benzisothiazol-3-ketone crude processing apparatus at first carries out the azeotropic desolventizing with the BIT crude, then adsorbs it edulcoration processing again, and the solvent has obtained the recovery, has also guaranteed the purity and the quality of BIT product.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a1, 2-benzisothiazole-3-ketone crude product processing device comprises a distillation still, wherein the bottom of the distillation still is sequentially connected with a first centrifugal separator, a first washing kettle, a second centrifugal separator and a BIT collecting tank through a feed liquid pipeline, the BIT collecting tank is connected with an alkali dissolving kettle through a BIT conveying pipeline, and the BIT conveying pipeline is arranged at the top of the alkali dissolving kettle; the bottom of the alkali dissolving kettle is sequentially connected with an activated carbon filter, a titanium rod filter, a screen plate type sealing filter and a neutralizing kettle through a conveying pipeline, the top of the alkali dissolving kettle is also provided with an activated carbon bin, a liquid alkali input pipeline and a water input pipeline, and the top of the neutralizing kettle is provided with an acid liquid input pipeline; the bottom of the neutralization kettle is sequentially connected with a third centrifugal separator, a second washing kettle and a fourth centrifugal separator through an output pipeline.

Preferably, the distillation tower is arranged at the top of the distillation still and is sequentially connected with a condenser and a solvent recovery tank through a pipeline.

Preferably, flow meters are arranged on the BIT material conveying pipeline, the liquid caustic soda input pipeline and the water input pipeline.

Preferably, the outer wall of the alkali dissolution kettle body is provided with a heating sleeve.

Preferably, the activated carbon bin is a conical bin, and the conical bin is a metering bin.

Preferably, a conveying pump is arranged on a conveying pipeline between the alkali dissolving kettle and the activated carbon filter, and a conveying pump is arranged on a conveying pipeline between the mesh plate type sealing filter and the neutralization kettle.

The utility model has the advantages of that: the utility model firstly carries out azeotropic desolventizing on the BIT crude product, and then carries out adsorption impurity removal treatment on the BIT crude product, thereby ensuring the purity and quality of the BIT product; distilling the BIT crude product in a distillation kettle, utilizing the azeotropy of a solvent and water to evaporate a mixture of the solvent and the water, condensing the mixture through a condenser, entering a solvent recovery tank, layering a water phase and an oil phase in the solvent recovery tank, wherein the oil phase is the solvent, and the water phase can return to the distillation kettle for recycling, so that the removal of the solvent in the BIT crude product is realized, and the solvent is recovered; adding BIT, water and liquid alkali into an alkali dissolving kettle, fully dissolving a BIT crude product, adding activated carbon, adsorbing and removing impurities under the action of the activated carbon, filtering the feed liquid to remove the activated carbon, feeding the filtered feed liquid into a neutralizing kettle, dropwise adding acid liquid into the neutralizing kettle, and performing a neutralizing reaction with the alkali liquid; the active carbon filter, the titanium rod filter and the screen plate type closed filter are sequentially adopted to filter the active carbon in the feed liquid, the filtering effect is good, and the screen plate type closed filter is adopted, so that the filtering area is large.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a device for processing a 1, 2-benzisothiazol-3-one crude product according to the present invention.

In the figure: 1-a distillation kettle, 2-a first centrifugal separator, 3-a first washing kettle, 4-a second centrifugal separator, 5-a BIT collecting tank, 6-a BIT conveying pipeline, 7-an alkali dissolving kettle, 8-an activated carbon filter, 9-a titanium rod filter, 10-a screen plate type sealing filter, 11-a neutralizing kettle, 12-an activated carbon bin, 13-a liquid alkali input pipeline, 14-a water input pipeline, 15-a conveying pump, 16-an acid liquid input pipeline, 17-a third centrifugal separator, 18-a second washing kettle, 19-a fourth centrifugal separator, 20-a distillation tower, 21-a condenser, 22-a solvent recovery tank, 23-a flow meter and 24-a heating sleeve.

Detailed Description

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

The device for treating the 1, 2-benzisothiazol-3-ketone crude product comprises a distillation kettle 1, wherein the bottom of the distillation kettle 1 is sequentially connected with a first centrifugal separator 2, a first washing kettle 3, a second centrifugal separator 4 and a BIT collecting tank 5 through a feed liquid pipeline, the BIT collecting tank 5 is connected with an alkali dissolving kettle 7 through a BIT conveying pipeline 6, and the BIT conveying pipeline 6 is arranged at the top of the alkali dissolving kettle 7; the bottom of the alkali dissolving kettle 7 is sequentially connected with an activated carbon filter 8, a titanium rod filter 9, a screen plate type sealing filter 10 and a neutralization kettle 11 through a conveying pipeline, the top of the alkali dissolving kettle 7 is also provided with an activated carbon bin 12, a liquid alkali input pipeline 13 and a water input pipeline 14, and the top of the neutralization kettle 11 is provided with an acid liquid input pipeline 16; the bottom of the neutralization kettle 11 is sequentially connected with a third centrifugal separator 17, a second water washing kettle 18 and a fourth centrifugal separator 19 through output pipelines.

The top of the distillation kettle 1 is provided with a distillation tower 20, and the distillation tower 20 is sequentially connected with a condenser 21 and a solvent recovery tank 22 through pipelines. And flow meters 23 are arranged on the BIT material conveying pipeline 6, the liquid caustic soda input pipeline 13 and the water input pipeline 14. And a heating sleeve 24 is arranged on the outer wall of the alkaline dissolving kettle 7. The activated carbon bin 12 is a conical bin which is a metering bin. And a conveying pump 15 is arranged on a conveying pipeline between the alkali dissolving kettle 7 and the activated carbon filter 8, and a conveying pump 15 is arranged on a conveying pipeline between the screen plate type sealing filter 10 and the neutralization kettle 11.

Distilling the crude BIT in a distillation kettle 1, utilizing the azeotropy of a solvent and water, distilling out a mixture of the solvent (such as tetrachloroethylene) and water, condensing the mixture through a condenser 21, entering a solvent recovery tank 22, layering a water phase and an oil phase in the solvent recovery tank 22, wherein the oil phase is the solvent, and the water phase can return to the distillation kettle 1 for recycling, so that the solvent in the crude BIT is removed; separating feed liquid from which a solvent is removed by a first centrifugal separator 2, washing the feed liquid by a first washing kettle 3 and separating the feed liquid by a second centrifugal separator 4 to obtain a BIT semi-finished product, wherein the BIT semi-finished product has poor color and luster and low purity, further decoloring and impurity removing treatment is carried out on the BIT semi-finished product, the BIT semi-finished product is added into an alkali dissolving kettle 7, water is added, steam is introduced into a heating sleeve 24 and heated, the steam is introduced into the heating sleeve 24, the temperature is raised, liquid alkali is added, BIT is completely dissolved, activated carbon is added into the alkali dissolving kettle 7 through an activated carbon bin 12, a certain amount of activated carbon is added into a conical bin, adsorption and impurity removal are carried out under the action of the activated carbon, after impurity removal is finished, the feed liquid sequentially enters an activated carbon filter 8, a titanium rod filter 9 and a screen plate type closed filter 10 through a conveying pump 15 and a conveying pipeline, the activated carbon in the feed liquid is filtered, finally enters a neutralization kettle, adjusting the pH value to 3-4 to realize adsorption and impurity removal of the BIT crude product, and then centrifuging through a third centrifugal separator 17, washing through a second washing kettle 18 and centrifuging through a fourth centrifugal separator 19 to obtain the BIT product.

The foregoing is merely exemplary and illustrative of the structure of the invention, and various modifications, additions and substitutions as described in the detailed description may be made by those skilled in the art without departing from the structure or exceeding the scope of the invention as defined in the claims.

Claims

1. The device for treating the 1, 2-benzisothiazol-3-ketone crude product is characterized by comprising a distillation still, wherein the bottom of the distillation still is sequentially connected with a first centrifugal separator, a first washing kettle, a second centrifugal separator and a BIT collecting tank through a material liquid pipeline, the BIT collecting tank is connected with an alkali dissolving kettle through a BIT conveying pipeline, and the BIT conveying pipeline is arranged at the top of the alkali dissolving kettle; the bottom of the alkali dissolving kettle is sequentially connected with an activated carbon filter, a titanium rod filter, a screen plate type sealing filter and a neutralizing kettle through a conveying pipeline, the top of the alkali dissolving kettle is also provided with an activated carbon bin, a liquid alkali input pipeline and a water input pipeline, and the top of the neutralizing kettle is provided with an acid liquid input pipeline; the bottom of the neutralization kettle is sequentially connected with a third centrifugal separator, a second washing kettle and a fourth centrifugal separator through an output pipeline.

2. The apparatus for processing the crude product of 1, 2-benzisothiazol-3-one according to claim 1, wherein a distillation tower is arranged at the top of the distillation still, and the distillation tower is sequentially connected with a condenser and a solvent recovery tank through pipelines.

3. The apparatus for processing the crude product of 1, 2-benzisothiazol-3-one as claimed in claim 1, wherein the BIT pipeline, the liquid caustic soda input pipeline and the water input pipeline are all provided with flow meters.

4. The device for processing the crude product of 1, 2-benzisothiazol-3-one as claimed in claim 1, wherein the outer wall of the alkali dissolving kettle body is provided with a heating jacket.

5. The apparatus for processing crude 1, 2-benzisothiazol-3-one according to claim 1, wherein the activated carbon silo is a conical silo, and the conical silo is a metering silo.

6. The device for processing the crude product of 1, 2-benzisothiazol-3-one as claimed in claim 1, wherein a delivery pump is arranged on the delivery pipeline between the alkali dissolution kettle and the activated carbon filter, and a delivery pump is arranged on the delivery pipeline between the mesh plate type sealing filter and the neutralization kettle.