Synthesizer of tetrabromobisphenol A

Abstract

The utility model discloses a synthesis device of tetrabromobisphenol A, and relates to the technical field of tetrabromobisphenol A. An inlet of a reaction kettle is respectively communicated with a bisphenol A tank, a dichloromethane tank, an intermediate tank and a hydrochloric acid tank through pipelines, and an inlet of the intermediate tank is respectively communicated with a sodium bromide tank, a sodium bromate tank and a purified water tank through pipelines; an outlet of the reaction kettle is communicated with a liquid separation tank through a pipeline, an outlet of the liquid separation tank is respectively communicated with a water phase tank and an organic phase tank through pipelines, an outlet of the organic phase tank is communicated with a distillation tank through a pipeline, a gas phase outlet of the distillation tank is communicated with a dichloromethane recovery tank through a pipeline, and a liquid phase outlet of the distillation tank is communicated with a filter through a pipeline. A solid-phase outlet of the filter is communicated with a dryer; an outlet of the dryer is communicated with a finished product tank. The reaction process is mild and easy to control, bromine does not need to be used as a raw material, hidden dangers of storage and transportation are eliminated, and the safety is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of tetrabromobisphenol A production, and particularly relates to a synthesis device for tetrabromobisphenol A. Background Technique

[0002] Tetrabromobisphenol A is an organic compound with the chemical formula C 15 H 12 Br4O2. It is a white crystalline powder, soluble in methanol and ether, insoluble in water, and is mainly used as a reactive flame retardant.

[0003] At present, domestic production of tetrabromobisphenol A generally uses chlorobenzene as a solvent. After mixing bisphenol A and chlorobenzene, a measured amount of hydrogen peroxide is added, and then bromine is dropped, and the reaction is carried out at low temperature to produce crude tetrabromobisphenol A. Then, after washing with water, freezing centrifugation, and vacuum drying, the tetrabromobisphenol A product is obtained. The use of highly toxic bromine and hazardous chemical hydrogen peroxide poses great challenges and potential hazards to operation safety and the environment. Summary of the Invention

[0004] The technical problem to be solved by the utility model is: aiming at the deficiencies existing in the prior art, to provide a synthesis device for tetrabromobisphenol A with low potential safety hazards.

[0005] To solve the above technical problem, the technical solution of the utility model is:

[0006] A synthesis device for tetrabromobisphenol A includes a reaction kettle. The inlets of the reaction kettle are respectively connected through pipelines to a bisphenol A tank, a dichloromethane tank, an intermediate tank, and a hydrochloric acid tank. The inlets of the intermediate tank are respectively connected through pipelines to a sodium bromide tank, a sodium bromate tank, and a purified water tank;

[0007] The outlet of the reaction kettle is connected through a pipeline to a separation tank. The outlets of the separation tank are respectively connected through pipelines to an aqueous phase tank and an organic phase tank. The outlet of the organic phase tank is connected through a pipeline to a distillation tank. The gas-phase outlet of the distillation tank is connected through a pipeline to a dichloromethane recovery tank. The liquid-phase outlet of the distillation tank is connected through a pipeline to a filter. The solid-phase outlet of the filter is connected to a dryer. The outlet of the dryer is connected to a finished product tank.

[0008] As an improved technical solution, the outlet of the aqueous phase tank is connected through a pipeline to the intermediate tank.

[0009] As an improved technical solution, the outlet of the aqueous phase tank is connected through a pipeline to the separation tank.

[0010] As an improved technical solution, the outlet of the organic phase tank is connected through a pipeline to a first decolorization tank. The inlet of the first decolorization tank is connected through a pipeline to a first sodium sulfite solution tank. The outlet of the first decolorization tank is connected through a pipeline to the distillation tank.

[0011] As an improved technical solution, the outlet of the first decolorization tank is connected to a second decolorization tank through a pipeline, the inlet of the second decolorization tank is connected to a second sodium sulfite solution tank through a pipeline, and the outlet of the second decolorization tank is connected to the distillation tank through a pipeline.

[0012] As an improved technical solution, the outlet of the second decolorization tank is connected to a recovery tank through a pipeline, and the outlet of the recovery tank is connected to the first sodium sulfite solution tank through a pipeline.

[0013] As a preferred technical solution, the liquid phase outlet of the filter is connected to a collection tank through a pipeline.

[0014] As a preferred technical solution, the solid phase outlet of the filter is connected to a water washing tank, and the outlet of the water washing tank is connected to the dryer through a pipeline.

[0015] The inlet of the distillation tank is connected to a sodium carbonate solution tank through a pipeline.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0017] A synthesis device for tetrabromobisphenol A of the present utility model includes a reaction kettle. The inlets of the reaction kettle are respectively connected to a bisphenol A tank, a dichloromethane tank, an intermediate tank, and a hydrochloric acid tank through pipelines. The inlets of the intermediate tank are respectively connected to a sodium bromide tank, a sodium bromate tank, and a purified water tank through pipelines. The outlet of the reaction kettle is connected to a separation tank through a pipeline. The outlets of the separation tank are respectively connected to an aqueous phase tank and an organic phase tank through pipelines. The outlet of the organic phase tank is connected to a distillation tank through a pipeline. The gas phase outlet of the distillation tank is connected to a dichloromethane recovery tank through a pipeline. The liquid phase outlet of the distillation tank is connected to a filter through a pipeline. The solid phase outlet of the filter is connected to a dryer, and the outlet of the dryer is connected to a finished product tank. Sodium bromide and sodium bromate are pre-dissolved in purified water, and then together with bisphenol A dissolved in dichloromethane are added to the reaction kettle. By continuously dropping hydrochloric acid, sodium bromide and sodium bromate react to produce bromine in an acidic environment. The produced bromine reacts with bisphenol A to produce tetrabromobisphenol A. The reaction process is relatively gentle and easy to control, and there is no need to use bromine as a raw material, eliminating the potential hazards of storage and transportation, and having higher safety.

[0018] The outlet of the aqueous phase tank of the present utility model is connected to the intermediate tank through a pipeline. By recycling the collected aqueous phase to the intermediate tank for dissolving sodium bromide and sodium bromate, and at the same time, a small amount of organic phase in the aqueous phase can re-enter the reaction kettle, avoiding waste of raw materials and saving costs.

[0019] The outlet of the aqueous phase tank is connected to the liquid separation tank through a pipeline, and after returning to the liquid separation tank, separation is carried out again, and a small amount of organic phase contained therein is recycled again, improving the product yield.

[0020] The outlet of the organic phase tank is connected to a first decolorization tank through a pipeline. The inlet of the first decolorization tank is connected to a first sodium sulfite solution tank through a pipeline. The outlet of the first decolorization tank is connected to the distillation tank through a pipeline. By adding a 10% wt sodium sulfite solution to preliminarily decolorize the organic phase, the chromaticity of the product is reduced, improving the product quality, and the aqueous phase is directly discharged.

[0021] The outlet of the first decolorization tank is connected to a second decolorization tank through a pipeline. The inlet of the second decolorization tank is connected to a second sodium sulfite solution tank through a pipeline. The outlet of the second decolorization tank is connected to the distillation tank through a pipeline. The preliminarily decolorized organic phase enters the second decolorization tank for secondary decolorization, further reducing the chromaticity of the product and greatly improving the product quality.

[0022] The outlet of the second decolorization tank is connected to a recovery tank through a pipeline. The outlet of the recovery tank is connected to the first sodium sulfite solution tank through a pipeline. The aqueous phase separated by the second decolorization tank can be used for the preparation and use of the eluent in the first sodium sulfite solution tank, saving resources, reducing costs, and at the same time avoiding harm to the environment caused by direct discharge.

[0023] The liquid phase outlet of the filter is connected to a collection tank through a pipeline. The material in the collection tank has a high water content and enters sewage treatment.

[0024] The solid phase outlet of the filter is connected to a washing tank, and the outlet of the washing tank is connected to the dryer through a pipeline. By flushing the filter cake, the purity of the product is improved.

[0025] The inlet of the distillation tank is connected to a sodium carbonate solution tank through a pipeline. By adding sodium carbonate to remove the by-products generated during the reaction process, the product quality is improved. Brief Description of the Drawings

[0026] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0027] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0028] Wherein: 1. Reaction kettle; 2. Bisphenol A tank; 3. Methylene chloride tank; 4. Intermediate tank; 5. Hydrochloric acid tank; 6. Sodium bromide tank; 7. Sodium bromate tank; 8. Purified water tank; 9. Liquid separation tank; 10. Aqueous phase tank; 11. Organic phase tank; 12. Distillation tank; 13. Methylene chloride recovery tank; 14. Filter; 15. Dryer; 16. Finished product tank; 17. First decolorization tank; 18. First sodium sulfite solution tank; 19. Second decolorization tank; 20. Recovery tank; 21. Collection tank; 22. Water washing tank; 23. Sodium carbonate solution tank; 24. Second sodium sulfite solution tank. Specific embodiments

[0029] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] As Figure 1 shown, a synthesis device for tetrabromobisphenol A includes a reaction kettle 1. The inlets of the reaction kettle 1 are respectively connected through pipelines to a bisphenol A tank 2, a methylene chloride tank 3, an intermediate tank 4, and a hydrochloric acid tank 5. The inlets of the intermediate tank 4 are respectively connected through pipelines to a sodium bromide tank 6, a sodium bromate tank 7, and a purified water tank 8. The outlet of the reaction kettle 1 is connected through a pipeline to a liquid separation tank 9. The outlets of the liquid separation tank 9 are respectively connected through pipelines to an aqueous phase tank 10 and an organic phase tank 11. The outlet of the organic phase tank 11 is connected through a pipeline to a distillation tank 12. The gas phase outlet of the distillation tank 12 is connected through a pipeline to a methylene chloride recovery tank 13. The liquid phase outlet of the distillation tank 12 is connected through a pipeline to a filter 14. The solid phase outlet of the filter 14 is connected to a dryer 15. The outlet of the dryer 15 is connected to a finished product tank 16. Sodium bromide and sodium bromate are pre-dissolved in purified water and then added to the reaction kettle 1 together with bisphenol A. By continuously dropping hydrochloric acid, sodium bromide and sodium bromate react to produce bromine in an acidic environment. The generated bromine reacts with bisphenol A to produce tetrabromobisphenol A. The reaction process is relatively gentle and easy to control, and there is no need to use bromine as a raw material, eliminating the potential hazards of storage and transportation and having higher safety.

[0031] The outlet of the aqueous phase tank 10 is connected through a pipeline to the intermediate tank 4. By recycling the collected aqueous phase to the intermediate tank 4 for dissolving sodium bromide and sodium bromate, and at the same time, a small amount of organic phase in the aqueous phase can re-enter the reaction kettle 1, avoiding waste of raw materials and saving costs. When the water content in the aqueous phase tank is too high, it is directly discharged to avoid affecting the product quality during recycling.

[0032] The outlet of the aqueous phase tank 10 is connected through a pipeline to the liquid separation tank 9. After recycling to the liquid separation tank 9, it is separated again, and the small amount of organic phase contained therein is recycled again, improving the product yield.

[0033] The outlet of the organic phase tank 11 is connected to a first decolorization tank 17 through a pipeline. The inlet of the first decolorization tank 17 is connected to a first sodium sulfite solution tank 18 through a pipeline. The outlet of the first decolorization tank 17 is connected to a second decolorization tank 19 through a pipeline. The inlet of the second decolorization tank 19 is connected to a second sodium sulfite solution tank 24 through a pipeline. The outlet of the second decolorization tank 19 is connected to the distillation tank 12 through a pipeline. By adding a 10% wt sodium sulfite solution, the organic phase is preliminarily decolorized, the chromaticity of the product is reduced, and the quality of the product is improved. The preliminarily decolorized organic phase enters the second decolorization tank 19 for secondary decolorization, further reducing the chromaticity of the product and greatly improving the quality of the product.

[0034] The outlet of the second decolorization tank 19 is connected to a recovery tank 20 through a pipeline. The outlet of the recovery tank 20 is connected to the first sodium sulfite solution tank 18 through a pipeline. The aqueous phase separated by the second decolorization tank 19 can be used for the preparation and use of the eluent in the first sodium sulfite solution tank 18, saving resources, reducing costs, and at the same time avoiding harm to the environment caused by direct discharge.

[0035] The liquid phase outlet of the filter 14 is connected to a collection tank 21 through a pipeline. The outlet of the collection tank 21 is connected to the distillation tank 12 through a pipeline.

[0036] The solid phase outlet of the filter 14 is connected to a washing tank 22. The outlet of the washing tank 22 is connected to the dryer 15 through a pipeline. By rinsing the filter cake, the purity of the product is improved.

[0037] The inlet of the distillation tank 12 is connected to a sodium carbonate solution tank 23 through a pipeline. By adding sodium carbonate, the by-products generated during the reaction are removed, and the quality of the product is improved.

[0038] It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A synthesis device for tetrabromobisphenol A, characterized in that: It comprises a reactor, the inlet of which is connected to a bisphenol A tank, a dichloromethane tank, an intermediate tank and a hydrochloric acid tank through pipelines, and the inlet of the intermediate tank is connected to a sodium bromide tank, a sodium bromate tank and a purified water tank through pipelines; The outlet of the reactor is connected to a liquid separation tank through a pipeline, and the outlet of the liquid separation tank is connected to an aqueous phase tank and an organic phase tank through pipelines respectively, the outlet of the organic phase tank is connected to a distillation tank through a pipeline, the gas phase outlet of the distillation tank is connected to a dichloromethane recovery tank through a pipeline, the liquid phase outlet of the distillation tank is connected to a filter through a pipeline, the solid phase outlet of the filter is connected to a dryer, and the outlet of the dryer is connected to a finished product tank.

2. A synthesis device for tetrabromobisphenol A as claimed in claim 1, characterized in that: The outlet of the water phase tank is connected to the intermediate tank through a pipeline.

3. The synthesis device of tetrabromobisphenol A as claimed in claim 1, characterized in that: The outlet of the water phase tank is connected to the liquid separation tank through a pipeline.

4. A synthesis device for tetrabromobisphenol A as claimed in claim 1, characterized in that: The outlet of the organic phase tank is connected to a first decolorization tank through a pipeline, the inlet of the first decolorization tank is connected to a first sodium sulfite solution tank through a pipeline, and the outlet of the first decolorization tank is connected to the distillation tank through a pipeline.

5. A synthesis device for tetrabromobisphenol A as claimed in claim 4, characterized in that: The outlet of the first decolorization tank is connected to the second decolorization tank through a pipeline, the inlet of the second decolorization tank is connected to the second sodium sulfite solution tank through a pipeline, and the outlet of the second decolorization tank is connected to the distillation tank through a pipeline.

6. A synthesis device for tetrabromobisphenol A as claimed in claim 5, characterized in that: The outlet of the second decolorizing tank is connected to a recovery tank through a pipeline, and the outlet of the recovery tank is connected to the first sodium sulfite solution tank through a pipeline.

7. The synthesis device of tetrabromobisphenol A as claimed in claim 1, characterized in that: The liquid phase outlet of the filter is connected to a collection tank through a pipeline.

8. The synthesis device of tetrabromobisphenol A as claimed in claim 1, characterized in that: The solid phase outlet of the filter is connected to a water washing tank, and the outlet of the water washing tank is connected to the dryer through a pipeline.

9. The synthesis device of tetrabromobisphenol A as claimed in claim 1, characterized in that: The inlet of the distillation tank is connected with a sodium carbonate solution tank through a pipeline.

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