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CN-224220755-U - Continuous high-efficiency reaction device for glycol ketal or acetal

CN224220755UCN 224220755 UCN224220755 UCN 224220755UCN-224220755-U

Abstract

The application relates to a continuous efficient reaction device of glycol ketal or acetal, which relates to the field of fine chemical production, and comprises a condensation tower, an oil-water separator and a rectifying tower, wherein a catalyst is filled in the condensation tower; the oil-water separator is communicated to the output end of the condensation tower, the oil-water separator is provided with a first discharge port for outputting water phase, the rectifying tower is communicated to the first discharge port of the oil-water separator, the rectifying tower is provided with a second discharge port for outputting dihydric alcohol and a third discharge port for outputting water, and the third discharge port is communicated to the output end of the condensation tower and is used for supplementing raw materials to the condensation tower. The dihydric alcohol separated after the water is removed by rectification can be taken as a raw material to be added into a condensation tower again to carry out condensation reaction with ketone or aldehyde, has the characteristics of continuous process, low investment and high industrialization value, and can promote ketal or acetal reaction without carrying water through an entrainer.

Inventors

  • Mou Jianhai
  • ZHANG YAO

Assignees

  • 武汉希音新材料科技有限公司

Dates

Publication Date
20260512
Application Date
20241231

Claims (9)

  1. 1. A continuous, high efficiency reaction apparatus for a glycol ketal or acetal, comprising: a condensation column (1) filled with a catalyst; The oil-water separator (2) is communicated with the output end of the condensation tower (1) and is used for receiving and separating products to form an oil phase and a water phase, and a first discharge port (21) for outputting the water phase is formed in the oil-water separator (2); the rectifying tower (3) is communicated with the first discharge port (21) of the oil-water separator (2) and is used for receiving and separating water phase to form dihydric alcohol and water, and the rectifying tower (3) is provided with a second discharge port (31) for outputting dihydric alcohol and a third discharge port (32) for outputting water; the third discharge port (32) is communicated to the output end of the condensation tower (1) and is used for supplementing raw materials to the condensation tower (1).
  2. 2. The reaction device according to claim 1, characterized in that the third discharge port (32) is connected with a cooling recovery structure (4), the cooling recovery structure (4) comprising a heat exchanger (41) and a transfer tank (42) which are sequentially communicated.
  3. 3. Reaction device according to claim 2, characterized in that the transfer tank (42) is connected with a vacuum system (5) for providing a vacuum environment for the rectifying column (3).
  4. 4. Reaction device according to claim 1, characterized in that the input end of the condensation column (1) is provided with a pretreatment structure (6), the pretreatment structure (6) comprising: A mixer (61) with an output connected to the input of the condensation column (1); -a pair of feed pipes (62), each of said feed pipes (62) being connected to an input of said mixer (61).
  5. 5. The reaction device according to claim 4, wherein a first heater (7) is arranged between the pretreatment structure (6) and the condensation column (1), or The pretreatment structure (6) is provided with a first heater (7) for heating the raw materials.
  6. 6. The reaction device according to claim 4, characterized in that the oil-water separator (2) has a fourth discharge port (22) and a fifth discharge port (23) for outputting an oil phase, the fourth discharge port (22) or the fifth discharge port (23) being connected to the input of the mixer (61).
  7. 7. The reaction device according to claim 1, wherein the rectifying tower (3) comprises a rectifying section and a stripping section which are sequentially arranged from bottom to top, 8-10 trays are arranged in the rectifying section, and 3-5 trays are arranged in the stripping section.
  8. 8. The reaction device according to claim 7, characterized in that the rectifying section is connected to the first outlet (21) by means of a pipe, on which a second heater (8) is arranged.
  9. 9. The reaction apparatus of any one of claims 1 to 8, wherein the catalyst is provided as at least any one of a-15 resin or 732 resin.

Description

Continuous high-efficiency reaction device for glycol ketal or acetal Technical Field The application relates to the field of fine chemical production, in particular to a continuous high-efficiency reaction device for glycol ketal or acetal. Background The glycol ketals or acetals can be catalytically hydrogenated to form a series of hydroxy ethers. Particularly, for ketone and aldehyde with higher carbon chain branching degree, the corresponding hydroxyl ether can be generated by condensing with dihydric alcohol and then hydrogenolyzing, and the use of dangerous raw materials such as ethylene oxide, propylene oxide, butylene oxide and the like is avoided. Meanwhile, the processing technology of the subsequent polyether is simplified. In the related art, the synthesis of ketals and acetals is commonly carried out by using entrainers with water, which promote the reaction to completion. This approach requires additional introduction of entrainer, increases the variety of impurities that separate, and when glycol is used as one of the raw materials, it is more difficult to react thoroughly with water due to the strong water absorption of glycol. In view of the foregoing, there is a need for a continuous and efficient device for producing glycol ketals or acetals that promotes the adequate condensation of the ketals or acetals without the introduction of entrainers. Disclosure of utility model The application provides a continuous high-efficiency reaction device for glycol ketal or acetal, which can promote the glycol ketal or acetal to fully perform condensation reaction on the premise of not introducing an entrainer, and has continuous process, low investment and great industrialization value. In a first aspect, the present application provides a continuous and efficient reaction device for glycol ketal or acetal, which adopts the following technical scheme: a continuous high efficiency reaction apparatus for a glycol ketal or acetal comprising: a condensation column filled with a catalyst; The oil-water separator is communicated with the output end of the condensation tower and is used for receiving and separating products to form an oil phase and a water phase, and a first discharge port for outputting the water phase is formed in the oil-water separator; The rectifying tower is communicated with the first discharge port of the oil-water separator and is used for receiving and separating water phase to form dihydric alcohol and water, and the rectifying tower is provided with a second discharge port for outputting dihydric alcohol and a third discharge port for outputting water; The third discharge port is communicated to the output end of the condensation tower and is used for supplementing raw materials to the condensation tower. Further, the third discharge gate is connected with the cooling recovery structure, the cooling recovery structure is including heat exchanger and the transfer jar of intercommunication in proper order. Further, the transfer tank is connected with a vacuumizing system for providing a vacuum environment for the rectifying tower. Further, the input end of the condensation tower is provided with a pretreatment structure, and the pretreatment structure comprises: the output end of the mixer is communicated with the input end of the condensation tower; and the pair of feeding pipelines are communicated with the input end of the mixer. Further, a first heater is arranged between the pretreatment structure and the condensation tower, or The pretreatment structure is provided with a first heater for heating raw materials. Further, the oil-water separator is provided with a fourth discharge port and a fifth discharge port for outputting an oil phase, and the fourth discharge port or the fifth discharge port is communicated to the input end of the mixer. Further, the rectifying tower comprises a rectifying section and a stripping section which are sequentially arranged from bottom to top, 8-10 tower plates are arranged in the rectifying section, and 3-5 tower plates are arranged in the stripping section. Further, the rectifying section is communicated to the first discharge port through a pipeline, and a second heater is arranged on the pipeline. Further, the catalyst is at least provided as any one of the a-15 resin or 732 resin. In summary, the present application includes at least one of the following beneficial technical effects: 1. The application is provided with the oil-water separator and the rectifying tower, the oil-water separator can separate the target product glycol ketal or acetal (namely oil phase) from the mixture of the dihydric alcohol and water (namely water phase), the water phase is output into the rectifying tower, the dihydric alcohol separated after the water is removed by rectification can be input into the condensing tower again as a raw material to carry out condensation reaction with ketone or aldehyde, and the application has the characteristics of continuous