CN213416720U

CN213416720U - Furanol molecule rectification purification device

Info

Publication number: CN213416720U
Application number: CN202022456611.0U
Authority: CN
Inventors: 陈龙; 唐伟; 梁启程; 晏西兵; 王恒启; 刘成龙; 匡彩远; 印红梅; 范金凤; 李乃艳; 刘闫
Original assignee: Jiangsu Sanjili Chemical Co ltd
Current assignee: Jiangsu Sanjili Chemical Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-06-11
Anticipated expiration: 2030-10-29

Abstract

The utility model relates to a furan phenol molecule rectification purification device, including blender, stirred tank, falling film evaporator charge-in pump, falling film evaporator, flash tank, wiped film type molecular distiller charge-in pump, wiped film type molecular distiller, gaseous phase one-level condenser, the finished product accepts the jar, gaseous phase second grade condenser, vacuum pump, heavy ends extraction pump, finished product extraction pump. The furan phenol is roughly purified by using a falling film evaporator, and the catechol is further removed by using a wiped film molecular distiller. The utility model discloses a molecular distillation technique improves the furan phenol productivity, effectively gets rid of catechol impurity, shortens operating time, avoids furan phenol heat-sensitive coking, improves furan phenol product purity to more than 99%.

Description

Furanol molecule rectification purification device

Technical Field

The utility model relates to a chemical product separation technical field specifically provides a furarol molecule purification by distillation device.

Background

Furanol is an intermediate for producing large-tonnage carbamate pesticide varieties such as carbofuran, haocarb, carbosulfan, furathiocarb and the like, the industrialized production of the furan phenol is realized in the last 80 th century by companies such as FMC, Norway Bostriga and Mitsubishi, and foreign companies always lock the technology of China. According to different raw materials, the following methods are mainly used for synthesizing the furan phenol: the ortho-nitrophenol process, the guaiacol process, the ortho-isopropylphenol process, the hydroxyacetone process, the cyclohexanone process, the ortho-chlorophenol process and the catechol process. Except the catechol method, other technical processes are tedious, the reaction conditions are harsh, the method is not suitable for the development trend of the production of the furan phenol at present, and some methods have low yield (generally about 30 percent) or the process is immature and still stays in a laboratory stage. The catechol method is a common method for synthesizing furan phenol in industrial production, and takes catechol and methyl allyl chloride as main raw materials. In the method, the boiling points of catechol and furan phenol are very close, the boiling points are only different by about 1 ℃ under high vacuum, and the separation by using a conventional rectification method needs very high tower height and tower diameter, so that the investment is huge and the yield is low. The residual pyrocatechol in the furan phenol product can seriously affect the quality of downstream products, so the key point is to reduce the content of the pyrocatechol in the furan phenol. Therefore, the conventional rectification method has a very high cost to solve the above-mentioned drawbacks.

Disclosure of Invention

The utility model provides a furylphenol molecule purification by distillation device. The application of the device can solve the problem of the purity of the existing furan phenol.

The technical scheme of the utility model is that the rectification and purification device of the furan phenol molecule comprises a mixer, a stirring kettle, a falling film evaporator, a flash tank, a wiped film type molecular distiller, a gas phase first-stage condenser, a gas phase second-stage condenser and a vacuum pump which are connected in sequence; the gas phase outlet of the flash tank is connected with the inlet of the gas phase first-stage condenser, and the gas phase outlet of the wiped film type molecular distiller is connected with the inlet of the gas phase first-stage condenser.

Preferably, the inlet and outlet of the feed pump of the falling film evaporator are respectively connected with the stirring kettle and the falling film evaporator, and the inlet and outlet of the feed pump of the wiped film type molecular distiller are respectively connected with the heavy component outlet of the flash tank and the inlet of the wiped film type molecular distiller.

Preferably, the heavy component outlet of the wiped film type molecular distillation device is connected with a heavy component extraction pump.

Preferably, the gas phase primary condenser uses circulating water for condensation and the gas phase secondary condenser uses chilled water for condensation.

Preferably, the gas-phase primary condenser and the gas-phase secondary condenser are respectively connected with a finished product receiving tank, and an outlet of the finished product receiving tank is connected with a finished product extraction pump.

Preferably, two materials of furan phenol and alcohol are added into the mixer (1), wherein the alcohol is high-boiling point alcohol.

Has the advantages that:

(1) coarse purifying the furan phenol by using a falling film evaporator, and further removing pyrocatechol by using a wiped film type molecular distiller; the alcohol substance and the catechol form hydrogen bonds, so that the boiling point difference of the furan phenol and the catechol is increased, and the separation difficulty of the furan phenol and the catechol entering the falling film evaporator and the wiped film type molecular distiller is reduced. The molecular distillation technology and the extractive distillation technology can well ensure that the furan phenol is prevented from being oxidized, decomposed and polymerized, and can remove catechol impurities in the crude furan phenol, thereby ensuring the stable product quality.

(2) The utility model discloses a molecular distillation technique improves the furan phenol productivity, effectively gets rid of catechol impurity, shortens operating time, avoids furan phenol heat-sensitive coking, improves furan phenol product purity to more than 99%.

Drawings

Fig. 1 is a schematic view of the device of the present invention. 1-a mixer, 2-a stirring kettle, 3-a falling-film evaporator feed pump, 4-a falling-film evaporator, 5-a flash tank, 6-a wiped film type molecular distiller feed pump, 7-a wiped film type molecular distiller, 8-a gas phase primary condenser, 9-a finished product receiving tank, 10-a gas phase secondary condenser, 11-a vacuum pump, 12-a heavy component extraction pump and 13-a finished product extraction pump.

Detailed Description

A device for rectifying and purifying furan phenol molecules comprises a mixer 1, a stirring kettle 2, a falling film evaporator 4, a flash tank 5, a wiped film type molecular distiller 7, a gas phase primary condenser 8, a gas phase secondary condenser 10 and a vacuum pump 11 which are connected in sequence; the gas phase outlet of the flash tank 5 is connected with the inlet of a gas phase first-level condenser 8, and the gas phase outlet of the wiped film type molecular distiller 7 is connected with the inlet of the gas phase first-level condenser 8.

The inlet and the outlet of a feed pump 3 of the falling film evaporator are respectively connected with the stirring kettle 2 and the falling film evaporator 4, and the inlet and the outlet of a feed pump 6 of the wiped film type molecular distiller are respectively connected with a heavy component outlet of a flash tank 5 and an inlet of a wiped film type molecular distiller 7.

The heavy component outlet of the wiped film type molecular distiller 7 is connected with a heavy component extraction pump 12. The gas phase primary condenser 8 uses circulating water for condensation and the gas phase secondary condenser 10 uses chilled water for condensation. The gas phase first-stage condenser 8 and the gas phase second-stage condenser 10 are respectively connected with a finished product receiving tank 9, and the outlet of the finished product receiving tank 9 is connected with a finished product extraction pump 13.

The device specifically works as follows: the vacuum degree of the system is stabilized to a preset value by a vacuum pump 11, the furan phenol and the high-boiling-point alcohol substance are mixed by a mixer 1 and then enter a stirring kettle 2 for further mixing and temperature increase, and the mixture is conveyed to a falling film evaporator 4 by a falling film reboiler feeding pump 3. After evaporation, the gas phase and the liquid phase enter a flash tank 5. The liquid phase heavy components in the flash tank 5 are conveyed to a wiped film molecular still 7 by a wiped film molecular still feed pump 6. After distillation, the gas phase in the wiped film type molecular distiller 7 and the gas phase in the flash tank 5 enter a gas phase primary condenser 8 and a gas phase secondary condenser 10 respectively. The gas phase primary condenser 8 uses circulating water for condensation and the gas phase secondary condenser 10 uses chilled water for condensation. The condensed material enters a finished product receiving tank 9, is extracted into a finished product storage tank by using a finished product extraction pump 13, and the discharged material at the bottom of the wiped film type molecular distiller 7 is conveyed to an incineration device by a heavy component extraction pump 12.

Claims

1. A device for rectifying and purifying furan phenol molecules is characterized by comprising a mixer (1), a stirring kettle (2), a falling film evaporator (4), a flash tank (5), a wiped film molecular distiller (7), a gas-phase primary condenser (8), a gas-phase secondary condenser (10) and a vacuum pump (11) which are connected in sequence; the gas phase outlet of the flash tank (5) is connected with the inlet of the gas phase first-stage condenser (8), and the gas phase outlet of the wiped film type molecular distiller (7) is connected with the inlet of the gas phase first-stage condenser (8).

2. The device for rectifying and purifying the furan phenol molecules as claimed in claim 1, wherein the inlet and the outlet of the feed pump (3) of the falling film evaporator are respectively connected with the stirring kettle (2) and the falling film evaporator (4), and the inlet and the outlet of the feed pump (6) of the wiped film type molecular distiller are respectively connected with the heavy component outlet of the flash tank (5) and the inlet of the wiped film type molecular distiller (7).

3. The device for rectifying and purifying the furan phenol molecules as claimed in claim 1, wherein the heavy component outlet of the wiped film type molecular distiller (7) is connected with a heavy component extraction pump (12).

4. The apparatus for the rectification and purification of furan phenol molecule according to claim 1, wherein the gas phase primary condenser (8) uses circulating water for condensation, and the gas phase secondary condenser (10) uses freezing water for condensation.

5. The device for rectifying and purifying the furan phenol molecules as claimed in claim 1, wherein the gas phase primary condenser (8) and the gas phase secondary condenser (10) are respectively connected with the finished product receiving tank (9), and the outlet of the finished product receiving tank (9) is connected with the finished product extraction pump (13).

6. The device for rectifying and purifying the furanol molecules as claimed in claim 1, wherein the mixer (1) is filled with two materials of the furanol and the alcohol, and the alcohol is a high-boiling-point alcohol.