CN217697977U - Device for purifying 4-methylallyl-catechol from furan phenol rectification residual liquid - Google Patents
Device for purifying 4-methylallyl-catechol from furan phenol rectification residual liquid Download PDFInfo
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- CN217697977U CN217697977U CN202221626474.3U CN202221626474U CN217697977U CN 217697977 U CN217697977 U CN 217697977U CN 202221626474 U CN202221626474 U CN 202221626474U CN 217697977 U CN217697977 U CN 217697977U
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Abstract
The utility model discloses a 4-methyl allyl-pyrocatechol device of furylphenol rectification raffinate purification, including furylphenol rectification waste residue feedstock line, rectifying column, tower cauldron agitating unit, tower cauldron film evaporator, film evaporator gaseous phase, circulating pump at the bottom of the film, film evaporator circulating line, rectifying column condenser, top of the tower light component extraction pump and rectifying column sideline extraction pipeline, adopt high vacuum rectification technique, greatly reduced the operating temperature of rectifying column, reduced the decomposition and the polymerization of product 4-methyl allyl-1,2-benzenediol. Meanwhile, the tower kettle adopts a film evaporator to replace a common tubular reboiler, and the film evaporator has the advantages of extremely small pressure drop, short heating time, small thermal resistance and high evaporation strength. Meanwhile, the stirring device is arranged in the tower kettle, so that the flowing condition of materials in the kettle is improved, the mass transfer efficiency and the heat transfer efficiency are improved, a high polymer film is not easily formed on the inner wall of the tower kettle, the formation of high polymers in the kettle is reduced, and the thermal decomposition of products is reduced.
Description
Technical Field
The utility model relates to a furylphenol production field specifically is a furylphenol rectification raffinate purification 4-methylallyl-pyrocatechol device.
Background
Furanol is a main intermediate for producing carbamate pesticides such as carbofuran, furametparb, carbofuran and benfuracarb. At present, in the industrial production of synthesizing the furan phenol by the catechol method, a large amount of byproducts are generated, and the byproducts cause the generation of a large amount of rectification waste residues after the furan phenol is rectified. In the current production process, the rectification waste residue is directly incinerated, so that a large amount of recyclable byproducts (the byproduct with the highest content is 4-methylallyl-1,2-benzenediol) are lost, and environmental pollution is caused.
4-methyl allyl-1,2-benzenediol can be used as one of raw materials for producing 3,4-methylenedioxyphenyl-2-acetone, and 3,4-methylenedioxyphenyl-2-acetone raw materials are mainly extracted from the roots and the stems of Huang Zhangshu, due to the influence of ecological protection policy, a route for synthesizing 3,4-methylenedioxyphenyl-2-acetone from safrole oil is restricted by the raw materials, so that the extraction of 4-methyl allyl-1,2-benzenediol from the furan phenol rectification residue has remarkable recycling economic characteristics and good economic significance; however, 4-methylallyl-1,2-benzenediol is easy to deteriorate at high temperature, is easy to decompose into light components and polymers, and has large loss in the rectification process, so that the device for purifying 4-methylallyl-pyrocatechol from furan phenol rectification residual liquid is provided.
Disclosure of Invention
The utility model aims at the defects of the prior art and provides a device for purifying 4-methylallyl-catechol from furan phenol rectification raffinate to solve the problems in the prior art.
In order to achieve the above object, the utility model provides a following technical scheme: a device for purifying 4-methylallyl-catechol from furan phenol rectification raffinate comprises a furan phenol rectification waste residue feeding pipeline, a rectification tower, a tower kettle stirring device, a tower kettle thin film evaporator, a thin film evaporator gas phase pipeline, a thin film bottom circulating pump, a thin film evaporator circulating pipeline, a rectification tower condenser, a tower top light component extraction pump and a rectification tower side line extraction pipeline, wherein the middle of the rectification tower is connected with the furan phenol rectification waste residue feeding pipeline, the top of the rectification tower is connected with the rectification tower condenser, the bottom of the rectification tower condenser is connected with the tower top light component extraction pump, one side of the middle of the rectification tower is connected with the rectification tower side line extraction pipeline, the bottom of the rectification tower is connected with the tower kettle thin film evaporator, the top of the tower kettle thin film evaporator is provided with the thin film bottom circulating pump, and the Bao Mode circulating pump is connected with the thin film evaporator circulating pipeline.
As an optimized technical scheme of the utility model, tower cauldron agitating unit is installed to the bottom of rectifying column, tower cauldron agitating unit comprises puddler and agitator motor.
As an optimized technical proposal of the utility model, the Bao Mode circulating pump is respectively connected with the rectifying tower and the tower kettle film evaporator through the circulating pipeline of the film evaporator.
As an optimized technical proposal of the utility model, the tower kettle film evaporator is connected with the rectifying tower through a gas phase pipeline of the film evaporator.
As the utility model discloses a preferred technical scheme, the top of rectifying column is passed through the connecting tube and is linked to each other with the rectifying column condenser, the rectifying column condenser passes through the connecting tube and links to each other with the light component extraction pump in top of the tower.
As an optimal technical scheme of the utility model, the internally mounted of tower cauldron film evaporator has hot plate and puddler, the top of puddler is connected with driving motor.
The utility model has the advantages that: the utility model solves the defects that the rectification recovery rate of the product is influenced by the high polymer content in the rectification tower, and the purity of the product 4-methylallyl-1,2-benzenediol is poor;
the high vacuum rectification technology is adopted, the operation temperature of the rectification tower is greatly reduced, and the decomposition and polymerization of the product 4-methylallyl-1,2-benzenediol are reduced. Meanwhile, the tower kettle adopts a film evaporator to replace a common tubular reboiler, and the film evaporator has the advantages of extremely small pressure drop, short heating time, small thermal resistance and high evaporation strength. Meanwhile, the stirring device is arranged in the tower kettle, so that the flowing condition of materials in the kettle is improved, the mass transfer efficiency and the heat transfer efficiency are improved, a high polymer film is not easily formed on the inner wall of the tower kettle, the formation of high polymers in the kettle is reduced, the product is reduced from being decomposed by heating, and the refining recovery rate of the 4-methylallyl-1,2-benzenediol is improved; the top of the rectifying tower is used for extracting the micro light components of thermal decomposition, and the side is used for extracting 4-methylallyl-1,2-benzenediol, so that the purity of the product is ensured.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a furan phenol rectification waste residue feed pipeline; 2. a rectifying tower; 3. a tower kettle stirring device; 4. a tower kettle film evaporator; 5. a thin film evaporator gas phase line; 6. a membrane bottom circulation pump; 7. A thin film evaporator circulation line; 8. a rectifying tower condenser; 9. a light component extraction pump at the top of the tower; 10. A pipeline is extracted from the side line of the rectifying tower.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be clearly and clearly defined.
Example (b): referring to fig. 1, the present invention provides a technical solution: a device for purifying 4-methylallyl-catechol from furan phenol rectification raffinate comprises a furan phenol rectification raffinate feeding pipeline 1, a rectification tower 2, a tower kettle stirring device 3, a tower kettle thin film evaporator 4, a thin film evaporator gas phase pipeline 5, a thin film bottom circulating pump 6, a thin film evaporator circulating pipeline 7, a rectification tower condenser 8, a tower top light component extraction pump 9 and a rectification tower side line extraction pipeline 10, wherein the middle of the rectification tower 2 is connected with the furan phenol rectification raffinate feeding pipeline 1, the top of the rectification tower 2 is connected with the rectification tower condenser 8, the bottom of the rectification tower condenser 8 is connected with the tower top light component extraction pump 9, the middle of the rectification tower 2 is connected with the rectification tower side line extraction pipeline 10, the bottom of the rectification tower 2 is connected with the tower kettle thin film evaporator 4, the top of the tower kettle thin film evaporator 4 is provided with the thin film evaporator gas phase pipeline 5 and connected with the thin film bottom circulating pump 6, and the thin film bottom circulating pump 6 is connected with the thin film evaporator circulating pipeline 7.
The bottom of the rectifying tower 2 is provided with a tower kettle stirring device 3, and the tower kettle stirring device 3 consists of a stirring rod and a stirring motor.
The film bottom circulating pump 6 is respectively connected with the rectifying tower 2 and the tower bottom film evaporator 4 through a film evaporator circulating pipeline 7.
The tower kettle thin film evaporator 4 is connected with the rectifying tower 2 through a thin film evaporator gas phase pipeline 5.
The top of the rectifying tower 2 is connected with a rectifying tower condenser 8 through a connecting pipeline, and the rectifying tower condenser 8 is connected with a tower top light component extraction pump 9 through a connecting pipeline.
A heating plate and a stirring rod are arranged inside the tower kettle film evaporator 4, and the top of the stirring rod is connected with a driving motor.
The working principle is as follows: the utility model provides a furan phenol rectification raffinate purification 4-methyl allyl-pyrocatechol device, includes furan phenol rectification waste residue feedstock line 1, rectifying column 2, tower cauldron agitating unit 3, tower cauldron film evaporator 4, film evaporator gas phase pipeline 5, film bottom circulating pump 6, film evaporator circulating line 7, rectifying column condenser 8, top of the tower light component extraction pump 9 and rectifying column side line extraction pipeline 10, the utility model discloses mainly solve the rectifying column that exists among the prior art high polymer content, influence the product rectification rate of recovery, and the product 4-methyl allyl-1,2-the poor shortcoming of benzenediol purity. By adopting a high vacuum rectification technology, the vacuum degree of the rectifying tower 2 is in the range of 0.1-0.5kpa (a), the operating temperature of the rectifying tower 2 is greatly reduced, and the decomposition and polymerization of the product 4-methylallyl-1,2-benzenediol are reduced. Meanwhile, the tower kettle adopts a film evaporator to replace a common tubular reboiler, and the tower kettle film evaporator 4 has the advantages of extremely small pressure drop, short heating time, small thermal resistance and high evaporation strength; meanwhile, the stirring device is arranged in the tower kettle, so that the flowing condition of materials in the kettle is improved, the mass transfer efficiency and the heat transfer efficiency are improved, a high polymer film is not easily formed on the inner wall of the tower kettle, the formation of high polymers in the kettle is reduced, the thermal decomposition of products is reduced, the refining recovery rate of 4-methylallyl-1,2-benzenediol is improved, the thermally decomposed trace light components are extracted from the top of the rectifying tower 2, 4-methylallyl-1,2-benzenediol is extracted from the side line through a rectifying tower side line extraction pipeline 10, and the purity of the products is ensured.
The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (6)
1. The utility model provides a 4-methallyl-catechol device of furan phenol rectification raffinate purification, includes furan phenol rectification waste residue feedstock pipeline (1), rectifying column (2), tower cauldron agitating unit (3), tower cauldron film evaporator (4), film evaporator gas phase pipeline (5), film bottom circulating pump (6), film evaporator circulating line (7), rectifying column condenser (8), top of the tower light component extraction pump (9) and rectifying column side draw pipeline (10), its characterized in that: the middle part of rectifying column (2) is connected with furan phenol rectification waste residue feed line (1), the top of rectifying column (2) is connected with rectifying column condenser (8), the bottom of rectifying column condenser (8) is connected with top of the tower light component extraction pump (9), middle part one side of rectifying column (2) is connected with rectifying column side draw pipeline (10), the bottom of rectifying column (2) is connected with tower cauldron film evaporator (4), film evaporator gas phase pipeline (5) are installed at the top of tower cauldron film evaporator (4) and are linked to each other, the bottom of tower cauldron film evaporator (4) is connected with Bao Mode circulating pump (6), be connected with film evaporator circulating line (7) on Bao Mode circulating pump (6).
2. The device for purifying 4-methylallyl-catechol from furan phenol rectification residual liquid according to claim 1, wherein the device comprises: the tower kettle stirring device (3) is installed at the bottom of the rectifying tower (2), and the tower kettle stirring device (3) is composed of a stirring rod and a stirring motor.
3. The device for purifying 4-methylallyl-catechol from furan phenol rectification residual liquid according to claim 1, wherein: the Bao Mode circulating pump (6) is respectively connected with the rectifying tower (2) and the tower kettle film evaporator (4) through a film evaporator circulating pipeline (7).
4. The device for purifying 4-methylallyl-catechol from furan phenol rectification residual liquid according to claim 1, wherein: the tower kettle thin film evaporator (4) is connected with the rectifying tower (2) through a thin film evaporator gas phase pipeline (5).
5. The device for purifying 4-methylallyl-catechol from furan phenol rectification residual liquid according to claim 1, wherein: the top of the rectifying tower (2) is connected with a rectifying tower condenser (8) through a connecting pipeline, and the rectifying tower condenser (8) is connected with a tower top light component extraction pump (9) through a connecting pipeline.
6. The device for purifying 4-methylallyl-catechol from furan phenol rectification residual liquid according to claim 1, wherein: and a heating plate and a stirring rod are arranged inside the tower kettle film evaporator (4), and the top of the stirring rod is connected with a driving motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221626474.3U CN217697977U (en) | 2022-06-27 | 2022-06-27 | Device for purifying 4-methylallyl-catechol from furan phenol rectification residual liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221626474.3U CN217697977U (en) | 2022-06-27 | 2022-06-27 | Device for purifying 4-methylallyl-catechol from furan phenol rectification residual liquid |
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| CN217697977U true CN217697977U (en) | 2022-11-01 |
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| CN202221626474.3U Active CN217697977U (en) | 2022-06-27 | 2022-06-27 | Device for purifying 4-methylallyl-catechol from furan phenol rectification residual liquid |
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