A high yield furan phenol purification device and process based on extraction process

Abstract

This invention discloses a high-yield furanol purification equipment and process based on an extraction process, relating to the field of furanol purification technology. It includes an extraction tower and a distillation kettle. The top of the extraction tower is connected to the distillation kettle via an oil phase material conveying pipeline. A raw material conveying pipeline is connected to the middle of the extraction tower, and a mixer is installed on the raw material conveying pipeline. Water is recycled, simplifying control. Neutralization with NaHCO3 solution greatly improves extraction efficiency, achieving high-purity products to meet specific market applications. The equipment is simple, with integrated control, reducing material conveying control processes. The xylene material system is recycled, utilizing the xylene processing section in the original furanol production unit. Material is collected after stratification, representing a coupled equipment solution that reduces the need for additional equipment. Furthermore, the added xylene material is the raw material used in the original production process. The boundaries of each stratification zone are controlled more accurately using a differential pressure level gauge supplemented by a conductivity meter.

Description

Technical Field

[0001] This invention relates to the field of furanol purification technology, specifically to a high-yield furanol purification equipment and process based on an extraction process. Background Technology

[0002] Currently, achieving high purity remains a significant technical challenge for companies producing furanol. The separation and removal of catechol, an impurity, is particularly difficult. Catechol and furanol are physically difficult to separate, and simple distillation methods are insufficient to obtain a high-purity product. As catechol is a raw material for furanol production, no alternative process has yet been developed.

[0003] Current literature describes the purification of furanol using extractive distillation, but the yield per extraction is relatively low. This invention purifies furanol through extraction, achieving a higher yield per extraction and a product purity of 99.8-99.9%, better meeting specific market demands. Therefore, this invention provides a high-yield furanol purification device and process based on the extraction process. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of low single-batch yield in furanol purification via extractive distillation, and to provide a high-yield furanol purification device and process based on the extraction process, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-yield furanol purification device based on an extraction process, comprising an extraction tower and a distillation kettle. The top of the extraction tower is connected to the distillation kettle via an oil phase material conveying pipeline. A raw material conveying pipeline is connected to the middle of the extraction tower, and a mixer is installed on the raw material conveying pipeline. A NaHCO3 solution conveying pipeline is located at the top of the raw material conveying pipeline, and a washing water conveying pipeline is located at the top of the NaHCO3 solution conveying pipeline. A flow guiding device is provided inside the extraction tower, passing through a stratification zone. A one-way valve is installed on the flow guiding device. A neutralizing agent conveying pipeline is located at the top of the stratification zone, and an oil phase conveying pipeline is connected to one side of the stratification zone. One end of the oil phase conveying pipeline is connected to a ring-forming liquid desolventizing section, which is connected to the extraction tower via a xylene conveying pipeline. The bottom of the extraction tower is connected to a washing water conveying pipeline, which is also connected to an intermittent desalting device.

[0006] As a preferred embodiment of the present invention, the bottom of the intermittent desalting device is connected to an industrial salt conveying pipeline.

[0007] As a preferred embodiment of the present invention, the top of the distillation vessel is connected to the raw material conveying pipeline via xylene and water conveying pipelines, and the bottom of the distillation vessel is connected to a high-purity furanol conveying pipeline.

[0008] As a preferred embodiment of the present invention, the oil phase material in the oil phase material conveying pipeline is: xylene, o-benzene, furanol, and water.

[0009] As a preferred embodiment of the present invention, the oil phase material in the oil phase conveying pipeline is xylene, o-benzene, and furanol.

[0010] As a preferred embodiment of the present invention, a first conductivity meter and a first boundary level meter are installed on one side of the top of the extraction tower, a second conductivity meter and a second boundary level meter are installed on one side of the stratification zone, and a third conductivity meter and a third boundary level meter are installed on one side of the bottom of the extraction tower.

[0011] As a preferred embodiment of the present invention, the washing water conveying pipeline, the NaHCO solution conveying pipeline, the raw material conveying pipeline, and the neutralizing agent conveying pipeline are all connected to the extraction tower via connecting flanges and sealing gaskets.

[0012] A high-yield furanol purification process based on an extraction process is implemented using a high-yield furanol purification device based on an extraction process. The specific steps are as follows:

[0013] S1: Furanol obtained by distillation is transported to the mixer through the raw material transport pipeline. At the same time, xylene and water are transported together to the raw material transport pipeline through the xylene and water transport pipeline.

[0014] The resulting furanol, xylene, and water are obtained by distillation, mixed in a mixer, and then fed into the middle of the extraction column.

[0015] S2: The washing water delivery pipeline delivers washing water to the top of the extraction tower, and the NaHCO3 solution delivery pipeline delivers NaHCO3 solution to the interior of the extraction tower. The pH value inside the extraction tower is adjusted by the NaHCO3 solution. Catechol forms sodium salt with NaHCO3 solution, which is more easily dissolved in water. Since the pH of cadmium is 4.7, which is lower than the pH of furanol is 7.1, the amount of NaHCO3 solution added is controlled to minimize the amount of furanol salt formed. The water washing operation at the top of the extraction tower ensures the final washing effect.

[0016] S3: The top of the extraction tower is equipped with a first conductivity meter and a first interface level meter. The oil phase material overflowing from the top, consisting of xylene, furanol, catechol and water, is transported to the distillation kettle through the oil phase material conveying pipeline.

[0017] After distillation in the distillation kettle, xylene and water are output from the top and transported to the raw material conveying pipeline through xylene and water conveying pipelines for recycling. The bottom of the distillation kettle contains purified furanol with a content of 99.8-99.9%, which is discharged through the high-purity furanol conveying pipeline.

[0018] S4: The aqueous phase after extraction flows downward in the extraction tower and passes through the stratification zone through the flow guide device. The flow guide device is equipped with a one-way valve. Neutralizing agent is added through the neutralizing agent delivery pipeline. At this time, the sodium salt of the organic matter that forms salt is converted back into organic matter after encountering acid. Xylene is delivered to the bottom of the extraction tower through the xylene delivery pipeline. After countercurrent multi-stage extraction, it enters the stratification zone.

[0019] The stratified zone is equipped with a second conductivity meter and a second interface level meter. The oil phase organic matter is sent to the desolventizing section of the cyclization liquid in the furanol production process through the overflow port and the oil phase conveying pipeline, so that the solvent xylene can be recycled.

[0020] S5: The bottom of the extraction tower is equipped with a third conductivity meter and a third interface level meter. The aqueous phase at the bottom of the extraction tower is recycled. When the NaCl concentration in the aqueous phase at the bottom of the extraction tower reaches saturation, it is switched to the intermittent desalting device. The desalted water is recycled back into the extraction tower, and the salt is discharged.

[0021] As a preferred embodiment of the present invention, the neutralizing agent in step S4 is hydrochloric acid or sulfuric acid.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. Water is recycled and easy to control;

[0024] 2. Neutralization with NaHCO3 solution can greatly improve extraction efficiency;

[0025] 3. To produce high-purity products to meet specific market applications;

[0026] 4. The equipment is simple and features integrated control, reducing the material conveying control process;

[0027] 5. The xylene material system is recycled, utilizing the xylene processing section in the original furanol production unit. The material is collected after stratification, which is a unit coupling scheme that reduces the addition of equipment and the xylene material added is the raw material used in the original production process.

[0028] 6. The boundaries of each stratified zone are controlled more accurately by a differential pressure boundary gauge and a conductivity meter. Attached image description:

[0029] Figure 1 This is a schematic diagram of the structure of the present invention.

[0030] In the diagram: 1. Extraction tower; 2. Distillation kettle; 3. Oil phase material conveying pipeline; 4. Washing water conveying pipeline; 5. NaHCO3 solution conveying pipeline; 6. Ring-linked liquid desolventizing section; 7. Separation zone; 8. Oil phase conveying pipeline; 9. Check valve; 10. Xylene conveying pipeline; 11. Neutralizing agent conveying pipeline; 12. Mixer; 13. Raw material conveying pipeline; 14. Intermittent desalting device; 15. Industrial salt conveying pipeline; 16. Xylene and water conveying pipeline; 17. First conductivity meter; 18. First boundary gauge; 19. High-purity furanol conveying pipeline; 20. Second conductivity meter; 21. Second boundary gauge; 22. Third conductivity meter; 23. Third boundary gauge. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0032] Please see Figure 1 This invention provides a technical solution: a high-yield furanol purification device and process based on an extraction process, comprising an extraction tower 1 and a distillation kettle 2. The top of the extraction tower 1 is connected to the distillation kettle 2 via an oil phase material conveying pipeline 3. A raw material conveying pipeline 13 is connected to the middle of the extraction tower 1. A mixer 12 is installed on the raw material conveying pipeline 13. A NaHCO3 solution conveying pipeline 5 is located at the top of the raw material conveying pipeline 13, and a washing water conveying pipeline 4 is located at the top of the NaHCO3 solution conveying pipeline 5. The extraction tower 1 is equipped with a flow guiding device that passes through the stratification zone 7. A one-way valve 9 is installed on the flow guiding device. A neutralizing agent delivery pipeline 11 is installed at the top of the stratification zone 7. An oil phase delivery pipeline 8 is connected to one side of the stratification zone 7. One end of the oil phase delivery pipeline 8 is connected to the ring liquid desolventizing section 6. The ring liquid desolventizing section 6 is connected to the extraction tower 1 through the xylene delivery pipeline 10. The bottom of the extraction tower 1 is connected to the washing water delivery pipeline 4. The washing water delivery pipeline 4 is also connected to the intermittent desalting device 14.

[0033] The bottom of the intermittent desalting device 14 is connected to an industrial salt delivery pipeline 15.

[0034] The top of the distillation vessel 2 is connected to the raw material conveying pipeline 13 via xylene and water conveying pipeline 16, and the bottom of the distillation vessel 2 is connected to the high-purity furanol conveying pipeline 19.

[0035] The oil phase material in oil phase material conveying pipeline 3 is: xylene, o-benzene, furanol, and water.

[0036] The oil phase materials in oil phase transport pipeline 8 are xylene, o-benzene, and furanol.

[0037] A first conductivity meter 17 and a first boundary meter 18 are installed on one side of the top of the extraction tower 1;

[0038] A second conductivity meter 20 and a second boundary meter 21 are installed on one side of the layered zone 7;

[0039] A third conductivity meter 22 and a third boundary meter 23 are installed on one side of the bottom of the extraction tower 1.

[0040] The washing water pipeline 4, the NaHCO3 solution pipeline 5, the raw material pipeline 13, and the neutralizing agent pipeline 11 are all connected to the extraction tower 1 via connecting flanges and sealing gaskets.

[0041] A high-yield furanol purification process based on extraction, the specific steps of which are as follows:

[0042] S1: Furanol obtained by distillation is transported to mixer 12 through raw material transport pipeline 13. At the same time, xylene and water are transported together to raw material transport pipeline 13 through xylene and water transport pipeline 16. Furanol, xylene and water obtained by distillation are mixed in mixer 12 and then enter the middle of extraction tower 1.

[0043] S2: Wash water delivery pipeline 4 delivers wash water to the top of extraction tower 1, and NaHCO3 solution delivery pipeline 5 delivers NaHCO3 solution to the interior of extraction tower 1;

[0044] The pH value in extraction tower 1 is adjusted by NaHCO3 solution. Catechol forms sodium salt with NaHCO3 solution, which is more soluble in water. Since the pH of cadmium is 4.7, which is lower than that of furanol (pH 7.1), the amount of NaHCO3 solution added is controlled to reduce the amount of furanol salt. The final washing effect is ensured by the water washing operation at the top of extraction tower 1.

[0045] S3: The top of the extraction tower 1 is equipped with a first conductivity meter 17 and a first interface meter 18. The oil phase material overflowing from the top, including xylene, furanol, catechol and water, is transported to the distillation kettle 2 through the oil phase material conveying pipeline 3.

[0046] After distillation in distillation vessel 2, xylene and water are output from the top and transported to raw material transport pipeline 13 via xylene and water transport pipeline 16 for recycling. The bottom of distillation vessel 2 contains purified furanol with a content of 99.8-99.9%, which is discharged through high-purity furanol transport pipeline 19.

[0047] S4: The extracted aqueous phase flows downward in the extraction tower 1 and passes through the layering zone 7 through the flow guiding device, which is equipped with a one-way valve 9;

[0048] Neutralizing agent is added through neutralizing agent delivery line 11. At this time, the sodium salt of the organic matter that forms salt is converted back into organic matter after encountering acid. Xylene is delivered to the bottom of extraction tower 1 through xylene delivery line 10. After countercurrent multi-stage extraction, it enters the stratification zone 7.

[0049] The stratified zone 7 is equipped with a second conductivity meter 20 and a second boundary meter 21. The oil phase organic matter is sent to the cyclization liquid desolventizing section 6 of the furanol production process through the overflow port and the oil phase conveying pipeline 8, so that the solvent xylene can be recycled.

[0050] S5: The bottom of the extraction tower 1 is equipped with a third conductivity meter 22 and a third boundary level meter 23. The aqueous phase at the bottom of the extraction tower 1 is recycled. When the NaCl concentration in the aqueous phase at the bottom of the extraction tower 1 reaches saturation, it is switched to the interstitial desalting device 14. The desalted water is recycled back into the extraction tower 1, and the salt is discharged.

[0051] Example 1: A high-yield furanol purification process based on extraction.

[0052] The specific steps are as follows:

[0053] S1: Furanol obtained by distillation is transported to mixer 12 through raw material transport pipeline 13. At the same time, xylene and water are transported together to raw material transport pipeline 13 through xylene and water transport pipeline 16. Furanol, xylene and water obtained by distillation are mixed in mixer 12 and then enter the middle of extraction tower 1.

[0054] S2: Wash water delivery pipeline 4 delivers wash water to the top of extraction tower 1, and NaHCO3 solution delivery pipeline 5 delivers NaHCO3 solution to the interior of extraction tower 1;

[0055] The pH value in extraction tower 1 is adjusted by NaHCO3 solution. Catechol forms sodium salt with NaHCO3 solution, which is more soluble in water. Since the pH of cadmium is 4.7, which is lower than that of furanol (pH 7.1), the amount of NaHCO3 solution added is controlled to reduce the amount of furanol salt. The final washing effect is ensured by the water washing operation at the top of extraction tower 1.

[0056] S3: The top of the extraction tower 1 is equipped with a first conductivity meter 17 and a first interface meter 18. The oil phase material overflowing from the top, including xylene, furanol, catechol and water, is transported to the distillation kettle 2 through the oil phase material conveying pipeline 3.

[0057] After distillation in distillation vessel 2, xylene and water are output from the top and transported to raw material transport pipeline 13 via xylene and water transport pipeline 16 for recycling. The bottom of distillation vessel 2 contains purified furanol with a content of 99.8-99.9%, which is discharged through high-purity furanol transport pipeline 19.

[0058] S4: The extracted aqueous phase flows downward in the extraction tower 1 and passes through the layering zone 7 through the flow guiding device, which is equipped with a one-way valve 9;

[0059] Hydrochloric acid is added through neutralizing agent delivery line 11. At this time, the sodium salt of the organic matter that forms salt is converted back into organic matter after encountering acid. Xylene is delivered to the bottom of extraction tower 1 through xylene delivery line 10. After countercurrent multi-stage extraction, it enters the stratification zone 7.

[0060] The stratified zone 7 is equipped with a second conductivity meter 20 and a second boundary meter 21. The oil phase organic matter is sent to the cyclization liquid desolventizing section 6 of the furanol production process through the overflow port and the oil phase conveying pipeline 8, so that the solvent xylene can be recycled.

[0061] S5: The bottom of the extraction tower 1 is equipped with a third conductivity meter 22 and a third boundary level meter 23. The aqueous phase at the bottom of the extraction tower 1 is recycled. When the NaCl concentration in the aqueous phase at the bottom of the extraction tower 1 reaches saturation, it is switched to the interstitial desalting device 14. The desalted water is recycled back into the extraction tower 1, and the salt is discharged.

[0062] Example 2: A high-yield furanol purification process based on extraction.

[0063] The specific steps are as follows:

[0064] S1: Furanol obtained by distillation is transported to mixer 12 through raw material transport pipeline 13. At the same time, xylene and water are transported together to raw material transport pipeline 13 through xylene and water transport pipeline 16. Furanol, xylene and water obtained by distillation are mixed in mixer 12 and then enter the middle of extraction tower 1.

[0065] S2: Wash water delivery pipeline 4 delivers wash water to the top of extraction tower 1, and NaHCO3 solution delivery pipeline 5 delivers NaHCO3 solution to the interior of extraction tower 1;

[0066] The pH value in extraction tower 1 is adjusted by NaHCO3 solution. Catechol forms sodium salt with NaHCO3 solution, which is more soluble in water. Since the pH of cadmium is 4.7, which is lower than that of furanol (pH 7.1), the amount of NaHCO3 solution added is controlled to reduce the amount of furanol salt. The final washing effect is ensured by the water washing operation at the top of extraction tower 1.

[0067] S3: The top of the extraction tower 1 is equipped with a first conductivity meter 17 and a first interface meter 18. The oil phase material overflowing from the top, including xylene, furanol, catechol and water, is transported to the distillation kettle 2 through the oil phase material conveying pipeline 3.

[0068] After distillation in distillation vessel 2, xylene and water are output from the top and transported to raw material transport pipeline 13 via xylene and water transport pipeline 16 for recycling. The bottom of distillation vessel 2 contains purified furanol with a content of 99.8-99.9%, which is discharged through high-purity furanol transport pipeline 19.

[0069] S4: The extracted aqueous phase flows downward in the extraction tower 1 and passes through the layering zone 7 through the flow guiding device, which is equipped with a one-way valve 9;

[0070] Sulfuric acid is added through neutralizing agent delivery line 11. At this time, the sodium salt of the organic matter that forms salt is converted back into organic matter after encountering acid. Xylene is delivered to the bottom of extraction tower 1 through xylene delivery line 10. After countercurrent multi-stage extraction, it enters the stratification zone 7.

[0071] The stratified zone 7 is equipped with a second conductivity meter 20 and a second boundary meter 21. The oil phase organic matter is sent to the cyclization liquid desolventizing section 6 of the furanol production process through the overflow port and the oil phase conveying pipeline 8, so that the solvent xylene can be recycled.

[0072] S5: The bottom of the extraction tower 1 is equipped with a third conductivity meter 22 and a third boundary level meter 23. The aqueous phase at the bottom of the extraction tower 1 is recycled. When the NaCl concentration in the aqueous phase at the bottom of the extraction tower 1 reaches saturation, it is switched to the interstitial desalting device 14. The desalted water is recycled back into the extraction tower 1, and the salt is discharged.

[0073] In conclusion:

[0074] The purification equipment and purification process of this invention offer the following advantages:

[0075] 1. Water is recycled and easy to control;

[0076] 2. Neutralization with NaHCO3 solution can greatly improve extraction efficiency;

[0077] 3. To produce high-purity products to meet specific market applications;

[0078] 4. The equipment is simple and features integrated control, reducing the material conveying control process;

[0079] 5. The xylene material system is recycled, utilizing the xylene processing section in the original furanol production unit. The material is collected after stratification, which is a unit coupling scheme that reduces the addition of equipment and the xylene material added is the raw material used in the original production process.

[0080] 6. The boundaries of each stratified zone are controlled more accurately by a differential pressure boundary gauge and a conductivity meter.

[0081] The above embodiments merely illustrate implementation methods of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A high yield furanolic purification plant based on extraction process, comprising an extraction column (1) and a distillation still (2), characterized by the fact that: The top side of the extraction tower (1) is connected to the distillation vessel (2) via an oil phase material conveying pipeline (3). A raw material conveying pipeline (13) is connected to the middle of the extraction tower (1). A mixer (12) is installed on the raw material conveying pipeline (13). A NaHCO3 solution conveying pipeline (5) is provided at the top of the raw material conveying pipeline (13). A washing water conveying pipeline (4) is provided at the top of the NaHCO3 solution conveying pipeline (5). A flow guiding device is provided inside the extraction tower (1). The flow guiding device passes through the stratification zone (7). The flow guiding device is equipped with a one-way valve (9), the top of the layered zone (7) is provided with a neutralizing agent delivery pipeline (11), one side of the layered zone (7) is connected to an oil phase delivery pipeline (8), one end of the oil phase delivery pipeline (8) is connected to a ring liquid desolventizing section (6), the ring liquid desolventizing section (6) is connected to the extraction tower (1) through a xylene delivery pipeline (10), the bottom of the extraction tower (1) is connected to a washing water delivery pipeline (4), and the washing water delivery pipeline (4) is also connected to an intermittent desalter (14); The top of the distillation vessel (2) is connected to the raw material delivery pipeline (13) via xylene and water delivery pipeline (16), and the bottom of the distillation vessel (2) is connected to a high-purity furanol delivery pipeline (19).

2. A high yield furanols purification apparatus based on extraction process according to claim 1, characterized in that: The bottom of the intermittent desalting device (14) is connected to an industrial salt delivery pipeline (15).

3. A high yield furanols purification apparatus based on extraction process according to claim 1, characterized in that: The oil phase material in the oil phase material conveying pipeline (3) is: xylene, catechol, furanol, and water.

4. The high yield furanols purification apparatus based on extraction process according to claim 1, characterized in that: The oil phase materials in the oil phase transport pipeline (8) are xylene, catechol and furanol.

5. The high-yield furanol purification equipment based on the extraction process according to claim 1, characterized in that: The washing water delivery pipeline (4), NaHCO3 solution delivery pipeline (5), raw material delivery pipeline (13), and neutralizing agent delivery pipeline (11) are all connected to the extraction tower (1) via connecting flanges and sealing gaskets.

6. A high yield furanols purification apparatus based on extraction process according to claim 1, characterized in that: A first conductivity meter (17) and a first boundary meter (18) are installed on one side of the top of the extraction tower (1), a second conductivity meter (20) and a second boundary meter (21) are installed on one side of the stratification zone (7), and a third conductivity meter (22) and a third boundary meter (23) are installed on one side of the bottom of the extraction tower (1).

7. A high yield furan phenol purification process based on extraction process characterized by: The high-yield furanol purification equipment based on the extraction process described in any one of claims 1-6 is implemented using the following specific steps: S1: Furanol obtained by distillation is transported to the mixer (12) through the raw material transport pipeline (13). At the same time, xylene and water are transported together to the raw material transport pipeline (13) through the xylene and water transport pipeline (16). Furanol, xylene and water obtained by distillation are mixed in the mixer (12) and then enter the middle of the extraction tower (1). S2: Washing water delivery pipeline (4) delivers washing water to the top of extraction tower (1), and NaHCO3 solution delivery pipeline (5) delivers NaHCO3 solution to the interior of extraction tower (1). The pH value inside extraction tower (1) is adjusted by NaHCO3 solution. Catechol forms sodium salt with NaHCO3 solution, which is more easily dissolved in water. Since the pH of cadmium is 4.7, which is lower than the pH of furanol is 7.1, the amount of NaHCO3 solution added is controlled so that the amount of furanol salt is small. The final washing effect is guaranteed by the water washing operation at the top of extraction tower (1). S3: The top of the extraction tower (1) is equipped with a first conductivity meter (17) and a first interface meter (18). The oil phase material overflowing from the top includes xylene, furanol, catechol and water, which is transported to the distillation kettle (2) through the oil phase material conveying pipeline (3). After distillation in the distillation kettle (2), xylene and water are output from the top and transported to the raw material conveying pipeline (13) through the xylene and water conveying pipeline (16) for recycling. The bottom of the distillation kettle (2) contains purified furanol, which has a content of 99.8-99.9%, and is discharged through the high-purity furanol conveying pipeline (19). S4: The aqueous phase after extraction flows downward in the extraction tower (1) and passes through the stratification zone (7) through the flow guide device. The flow guide device is equipped with a one-way valve (9). Neutralizing agent is added through the neutralizing agent delivery pipeline (11). At this time, the sodium salt of the organic matter that forms salts turns back into organic matter after encountering acid. Xylene is delivered to the bottom of the extraction tower (1) through the xylene delivery pipeline (10). After countercurrent multi-stage extraction, it enters the stratification zone (7). The stratification zone (7) is equipped with a second conductivity meter (20) and a second boundary meter (21). The oil phase organic matter goes to the cyclization liquid desolventization section (6) of the furanol production process through the overflow port and the oil phase delivery pipeline (8) so that the solvent xylene can be recycled. S5: The bottom of the extraction tower (1) is equipped with a third conductivity meter (22) and a third boundary meter (23). The water phase at the bottom of the extraction tower (1) is recycled. When the NaCl concentration in the water phase at the bottom of the extraction tower (1) reaches saturation, it is switched to the interstitial desalting device (14). The desalted water enters the extraction tower (1) for recycling, and the salt is discharged.

8. A high yield furanols purification process based on extraction process according to claim 7, characterized in that: The neutralizing agent in step S4 is hydrochloric acid or sulfuric acid.

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