CN211170525U - Preparation system of n-amyl acetate - Google Patents
Preparation system of n-amyl acetate Download PDFInfo
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- CN211170525U CN211170525U CN201922396971.3U CN201922396971U CN211170525U CN 211170525 U CN211170525 U CN 211170525U CN 201922396971 U CN201922396971 U CN 201922396971U CN 211170525 U CN211170525 U CN 211170525U
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Abstract
The utility model relates to a preparation system of n-amyl acetate, which comprises an esterification reaction stage, a dehydration stage, a weight removal stage, a light removal stage and a rectification stage; wherein, the equipment in the esterification reaction stage is as follows: a reaction kettle and a condenser; the equipment in the dehydration stage is as follows: a phase splitter; the equipment in the weight removing stage is as follows: a thin film evaporator and a heavy component collecting tank; the equipment in the light component removing stage comprises the following steps: a light component removal tower; the rectification stage comprises the following equipment: a rectifying tower and a finished product tank. The utility model discloses a preparation system adopts film evaporator to take off heavy processing, can get rid of the catalyst in the product effectively, prevents the decomposition of follow-up rectification in-process n-amyl acetate effectively to improve product quality, and the product purity who obtains is high, can store for a long time, can neglect equipment corrosion, and also minimum to the pollution of environment.
Description
Technical Field
The utility model relates to a production facility technical field of acetate class compound, in particular to preparation system of n-amyl acetate.
Background
N-amyl acetate, also known as "banana water", is a colorless and transparent liquid with banana and fruit flavors, is slightly soluble in water, and is miscible with alcohol and ether. N-amyl acetate is widely used in the industries of cosmetics, spices, gunpowder, film, medicine, chemical industry, plastics, namely, textiles and the like.
The traditional preparation process of the n-amyl acetate adopts concentrated sulfuric acid as a catalyst, glacial acetic acid and n-amyl alcohol are used as raw materials, and the n-amyl acetate is prepared by esterification, dehydration, lightness removal and rectification, the concentrated sulfuric acid is used as the catalyst, although the reaction rate is high, side reactions are more, particularly, in the subsequent lightness removal and rectification processes, the yield and the quality are reduced due to the decomposition of the n-amyl acetate, in addition, the existence of the concentrated sulfuric acid can corrode equipment, and a large amount of acetic acid is generated in the subsequent processesAcid waste water seriously pollutes the environment. With the continuous improvement of science and technology and production level, the production process of n-amyl acetate is also continuously improved, but the attempt is usually made by selecting different catalysts, and modified molecular sieves, resins, solid super acids, heteropolyacids, composite metal oxides, acidic supported activated carbon and the like are commonly reported, and the catalysts have the advantages that the catalysts do not participate in a reaction system, belong to heterogeneous catalysts and are easy to separate; but the defects of complicated manufacture, high price, general yield, short service life and complicated subsequent treatment and can not realize industrialized mass production. The invention name of Chinese patent publication No. CN 105251538B is a catalyst H6P2W15Mo3O62/TiO2And n-amyl acetate, although the yield of n-amyl acetate is improved under mild reaction conditions by improving the catalyst, and the environment is not polluted, the synthesis steps of the catalyst are complicated, and the production cost is increased.
In order to solve the above problems, the present applicant has previously developed a process for producing n-pentyl acetate by research, and in order to complement the process, the present applicant has provided a system for producing n-pentyl acetate.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a preparation system of n-amyl acetate, in order to support the preparation technology of n-amyl acetate that the applicant improved and filed.
In order to achieve the above purpose, the utility model provides a technical scheme as follows:
a preparation system of n-amyl acetate comprises an esterification reaction stage, a dehydration stage, a heavy component removal stage, a light component removal stage and a rectification stage; wherein, the equipment in the esterification reaction stage is as follows: a reaction kettle and a condenser; the equipment in the dehydration stage is as follows: a phase splitter; the equipment in the weight removing stage is as follows: a thin film evaporator and a heavy component collecting tank; the equipment in the light component removing stage comprises the following steps: a light component removal tower; the rectification stage comprises the following equipment: a rectifying tower and a finished product tank.
Furthermore, the side wall of the reaction section of the reaction kettle is provided with a raw material inlet, the top of the reaction kettle is provided with a gas phase outlet, the gas phase outlet is provided with a three-way valve, and the bottom of the reaction kettle is provided with a reaction liquid outlet;
the condenser comprises a condensation inlet and a condensation outlet, wherein the condensation inlet is connected with the gas phase outlet through a three-way valve.
Furthermore, the phase separator comprises a phase separator inlet, a phase separator first outlet and a phase separator second outlet, the phase separator inlet is connected with the condensation outlet through a pipeline, and the phase separator first outlet is connected with the gas phase outlet through a three-way valve.
Further, the thin film evaporator comprises a crude product inlet, a light component outlet and a heavy component outlet, wherein the crude product inlet is connected with the reaction liquid outlet through a pipeline;
and the heavy component collecting tank is connected with the heavy component outlet of the thin film evaporator through a pipeline at the inlet thereof, and is connected with the crude product inlet of the thin film evaporator through a pipeline at the outlet thereof.
Further, the light component removal tower comprises a light component removal tower inlet, a first light component removal tower outlet arranged at the top of the light component removal tower and a second light component removal tower outlet arranged at the bottom of the light component removal tower; and the inlet of the light component removal tower is connected with the light component outlet of the thin film evaporator through a pipeline.
Further, the rectifying tower comprises a rectifying tower feed inlet, a rectifying tower first outlet, a rectifying tower second outlet and a raffinate outlet, wherein the rectifying tower feed inlet is connected with the lightness-removing tower second outlet through a pipeline;
and the inlet of the finished product tank is connected with the second outlet of the rectifying tower through a pipeline.
Compared with the prior art, the utility model, its advantage lies in with beneficial effect:
the utility model discloses a preparation system adopts film evaporator to take off heavy processing, can get rid of the catalyst in the product effectively, prevents the decomposition of follow-up rectification in-process n-amyl acetate effectively to improve product quality, and the product purity who obtains is high, can store for a long time, can neglect equipment corrosion, and also minimum to the pollution of environment.
Drawings
FIG. 1 is a flow diagram of a process for the preparation of n-pentyl acetate;
FIG. 2 is a schematic view of a preparation system according to an embodiment of the present invention;
reference numerals: the device comprises a reaction kettle 1, a condenser 2, a phase separator 3, a thin film evaporator 4, a heavy component collecting tank 5, a light component removing tower 6, a rectifying tower 7 and a finished product tank 8.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
In order to improve the defects that in the existing preparation process of the n-amyl acetate, the yield and the quality are reduced due to the decomposition of the n-amyl acetate in the light component removal and rectification processes, and concentrated sulfuric acid corrodes equipment and generates a large amount of acid wastewater subsequently to seriously pollute the environment, the applicant provides a preparation process of the n-amyl acetate through research and improvement, wherein the process flow is shown in figure 1, and a heavy component removal step is added between dehydration and light component removal to effectively remove a catalyst in a product, so that the decomposition of the n-amyl acetate in the subsequent rectification process is effectively prevented, the product quality is improved, the purity of the obtained product is high, the product can be stored for a long time, the corrosion to the equipment is negligible, and the pollution to the environment is extremely small.
In order to match with the preparation process of the n-amyl acetate, the utility model provides a preparation system of the n-amyl acetate, which comprises an esterification reaction stage, a dehydration stage, a heavy component removal stage, a light component removal stage and a rectification stage as shown in figure 2.
Wherein, the esterification reaction stage adopts the following equipment: a reaction kettle 1, wherein a raw material inlet is arranged on the side wall of the reaction section of the reaction kettle 1, a gas phase outlet is arranged at the kettle top of the reaction kettle 1, a three-way valve (not shown in the figure) is arranged at the gas phase outlet, and a reaction liquid outlet is arranged at the kettle bottom of the reaction kettle 1;
and the condenser 2 comprises a condensation inlet and a condensation outlet, and the condensation inlet is connected with the gas phase outlet through a three-way valve.
The dehydration stage adopts the following equipment: and the phase separator 3 comprises a phase separator inlet, a phase separator first outlet and a phase separator second outlet, the phase separator inlet is connected with the condensation outlet through a pipeline, and the phase separator first outlet is connected with the gas phase outlet through a three-way valve.
The de-weighting stage adopts the following equipment: the thin film evaporator 4 comprises a crude product inlet, a light component outlet and a heavy component outlet, wherein the crude product inlet is connected with the reaction liquid outlet through a pipeline;
and the heavy component collecting tank 5 is connected with the heavy component outlet of the thin film evaporator 4 through a pipeline at the inlet thereof, and is connected with the crude product inlet of the thin film evaporator 4 through a pipeline at the outlet thereof.
The light component removal stage adopts the following equipment: and the light component removal tower 6 comprises a light component removal tower inlet, a first light component removal tower outlet arranged at the top of the light component removal tower and a second light component removal tower outlet arranged at the bottom of the light component removal tower, and the light component removal tower inlet is connected with the light component removal tower outlet of the thin film evaporator through a pipeline.
The rectification stage adopts the following equipment: the rectifying tower 7 comprises a rectifying tower feed inlet, a rectifying tower first outlet, a rectifying tower second outlet and a raffinate outlet, wherein the rectifying tower feed inlet is connected with the light component removal tower second outlet through a pipeline;
and the inlet of the finished product tank 8 is connected with the second outlet of the rectifying tower through a pipeline.
The utility model discloses a theory of operation: putting raw materials required by the reaction into a reaction kettle 1 through a raw material inlet, stirring and heating the raw materials until the raw materials are subjected to boiling reaction, allowing reaction liquid steam to enter a condenser 2 through a gas phase outlet through a condensation inlet, precooling and liquefying a part of the reaction liquid steam, returning the precooled and liquefied reaction liquid steam to the reaction kettle along the original path, allowing the other part of the reaction liquid steam to enter a phase separator 3 through a condensation outlet, separating the reaction liquid steam into a water layer and an organic layer in the phase separator 3, returning the organic layer liquid to the reaction kettle 1 for continuous reaction, and collecting the separated water layer to be treated in the next step; collecting reaction liquid from a reaction liquid outlet of the reaction kettle 1, conveying the reaction liquid to a thin film evaporator 4 for distillation, obtaining an intermediate product from a light component outlet of the thin film evaporator 4, conveying the intermediate product to a light component removal tower 6 through a pipeline, collecting a heavy component from a heavy component outlet of the thin film evaporator to a heavy component collecting tank 5, conveying the heavy component to the thin film evaporator 4 for distillation after the heavy component collecting tank 5 accumulates to a certain collection amount, and stopping repeatedly until the heavy component is in a viscous semi-solid state; and (3) collecting a crude product of the n-amyl acetate from a kettle bottom outlet of the light component removal tower 6, sending the crude product into a rectifying tower 7 for rectification, combining a light component discharged from a first outlet of the rectifying tower with a light component distilled from the light component removal tower 6, recycling the light component into the next reaction kettle after calculation, collecting a finished product discharged from a second outlet of the rectifying tower to a finished product tank 8, and collecting a residual liquid discharged from a residual liquid outlet of the rectifying tower for further treatment.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only for the purpose of illustrating the principles of the present invention, without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A preparation system of n-amyl acetate is characterized by comprising an esterification reaction stage, a dehydration stage, a heavy component removal stage, a light component removal stage and a rectification stage; wherein, the equipment in the esterification reaction stage is as follows: a reaction kettle and a condenser; the equipment in the dehydration stage is as follows: a phase splitter; the equipment in the weight removing stage is as follows: a thin film evaporator and a heavy component collecting tank; the equipment in the light component removing stage comprises the following steps: a light component removal tower; the rectification stage comprises the following equipment: a rectifying tower and a finished product tank.
2. The system for preparing n-amyl acetate according to claim 1, wherein the reaction kettle is provided with a raw material inlet on the side wall of the reaction section, a gas phase outlet on the top of the reaction section, a three-way valve on the gas phase outlet, and a reaction liquid outlet on the bottom of the reaction section;
the condenser comprises a condensation inlet and a condensation outlet, wherein the condensation inlet is connected with the gas phase outlet through a three-way valve.
3. The system for preparing n-amyl acetate according to claim 1, wherein the phase separator comprises a phase separator inlet, a phase separator first outlet and a phase separator second outlet, the phase separator inlet is connected with the condensation outlet through a pipeline, and the phase separator first outlet is connected with the gas phase outlet through a three-way valve.
4. The system for preparing n-amyl acetate according to claim 1, wherein said thin film evaporator comprises a crude product inlet, a light component outlet and a heavy component outlet, said crude product inlet being connected to the reaction liquid outlet by a pipeline;
the heavy component collecting tank is connected with the heavy component outlet of the thin film evaporator through a pipeline at the inlet thereof, and is connected with the crude product inlet of the thin film evaporator through a pipeline at the outlet thereof; and the inlet of the light component removal tower is connected with the light component outlet of the thin film evaporator through a pipeline.
5. The system for preparing n-amyl acetate according to claim 1, wherein said lightness-removing column comprises a lightness-removing column inlet, a first lightness-removing column outlet arranged at the top of the lightness-removing column and a second lightness-removing column outlet arranged at the bottom of the lightness-removing column.
6. The preparation system of n-amyl acetate according to claim 1, wherein the rectification column comprises a rectification column feed inlet, a rectification column first outlet, a rectification column second outlet and a raffinate outlet, and the rectification column feed inlet is connected with the lightness-removing column second outlet through a pipeline;
and the inlet of the finished product tank is connected with the second outlet of the rectifying tower through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922396971.3U CN211170525U (en) | 2019-12-26 | 2019-12-26 | Preparation system of n-amyl acetate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922396971.3U CN211170525U (en) | 2019-12-26 | 2019-12-26 | Preparation system of n-amyl acetate |
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| CN211170525U true CN211170525U (en) | 2020-08-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113045421A (en) * | 2019-12-26 | 2021-06-29 | 江苏怡达化学股份有限公司 | Preparation process and equipment of diisopropyl adipate |
| CN113045411A (en) * | 2019-12-26 | 2021-06-29 | 江苏怡达化学股份有限公司 | Preparation process and equipment of n-amyl acetate |
| CN113045412A (en) * | 2019-12-26 | 2021-06-29 | 江苏怡达化学股份有限公司 | Preparation process and equipment of adipic acid dibasic ester |
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2019
- 2019-12-26 CN CN201922396971.3U patent/CN211170525U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113045421A (en) * | 2019-12-26 | 2021-06-29 | 江苏怡达化学股份有限公司 | Preparation process and equipment of diisopropyl adipate |
| CN113045411A (en) * | 2019-12-26 | 2021-06-29 | 江苏怡达化学股份有限公司 | Preparation process and equipment of n-amyl acetate |
| CN113045412A (en) * | 2019-12-26 | 2021-06-29 | 江苏怡达化学股份有限公司 | Preparation process and equipment of adipic acid dibasic ester |
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