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Rectification column for preventing thermal-sensitisation and rectification separation process for preventing thermal-sensitisation of natural material

A rectification tower and heat-proof technology, which is applied in the field of heat-resistant rectification separation technology and equipment for natural materials, can solve heat-sensitive and other problems, and achieve the goal of preventing heat-sensitive reactions, suppressing heat-sensitive reactions, and reducing volume Effect

Active Publication Date: 2014-11-05
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the defect of heat sensitivity of the above-mentioned rectification and separation device for heat-sensitive natural substances, and propose a new natural substance anti-heat-sensitive rectification and separation process and equipment

Method used

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  • Rectification column for preventing thermal-sensitisation and rectification separation process for preventing thermal-sensitisation of natural material
  • Rectification column for preventing thermal-sensitisation and rectification separation process for preventing thermal-sensitisation of natural material
  • Rectification column for preventing thermal-sensitisation and rectification separation process for preventing thermal-sensitisation of natural material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The mixed solution of eucalyptus crude oil and ethanol enters tower still 3 through rectifying tower 2 from pipeline 1, and rectifying tower 2 diameter is 0.15m, and theoretical plate number is 40, and the total volume of tower still 3 is 50L, tower still The aspect ratio is 3:1. Open the vacuum system 22, the pressure of the whole rectifying system is reduced to 400 mm Hg, the falling film reboiler 5 starts heating, the volume of the falling film reboiler 5 is 500L, the heating of the falling film reboiler 5 The temperature of the medium is 140°C. Simultaneously open the pump 7 to circulate the liquid material in the tower kettle 3, and the circulation flow rate of the centrifugal pump is 40m 3 / h, the vapor phase produced in the falling film reboiler 5 enters the bottom of the rectification tower 2 together with the unvaporized feed liquid, the vapor phase is separated through the rectification tower 2, and the vapor phase that reaches the top enters the T-type conden...

Embodiment 2

[0028] Masson pine turpentine is separated by two-tower process. Concrete equipment structure and method of operation are similar to embodiment 1 (as Figure 4 shown). The masson pine turpentine is added to the rectification column A2 of the rectification system. The diameter of the rectification tower A2 is 0.15m, the number of theoretical plates is 40, the total volume of the tower still 3 is 50L, and the height-to-diameter ratio of the tower still is 3:1. The pressure control of the rectification column A2 is operated at 40 mmHg, and the heating temperature of the falling film reboiler 5 is 140° C. The circulating flow rate of the centrifugal pump is 30m 3 / h. Total reflux for a period of time and after the temperature of the whole tower is stabilized, the top temperature of the rectification tower A1 is controlled at about 90°C, and α-pinene is extracted at the top, with an output of 180kg / h, and its purity can reach more than 98%. α-pinene The yield of pinene can rea...

Embodiment 3

[0031] Similar to the operation mode of Example 2, the mixed solution of dihydromyrcenol, dihydromyrcene and isopropanol is added to the rectification system, and the operating pressure of rectification tower A2 is controlled by the vacuum system to 20 mm Hg (rectification tower A diameter of 0.15m, the number of theoretical plates is 40), the heating temperature of falling film reboiler 5 is 140°C, and the circulation flow rate of centrifugal pump 7 is 40m 3 / h, full reflux for a period of time, after the temperature of the whole tower is stable, extract dihydromyrcenol from the bottom of the rectification tower A2 (output 300kg / h, reflux ratio 2 / 5), and its content and purity can reach 95.6%. It is then sent to the rectification tower BT2 for rectification, and more than 99.5% of the dihydromyrcenol product can be obtained from the top of the rectification tower BT2. Through this anti-heat sensitive device and process operation, the average residence time of materi...

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Abstract

Disclosed are a rectification column for preventing thermal-sensitisation and a rectification separation process for preventing thermal-sensitisation of natural material. The rectification column for preventing thermal-sensitisation comprises a rectification column (2), T-shaped condenser (4) arranged directly on the top of the rectification column (2) and connected with it without conduits, a baffle (12), a column bottom (3) and a falling-film reboiler (5), wherein the circular baffle (12) is disposed in the T-shaped condenser (4), an annular liquid-collecting slot (20) is disposed between the rectification column (2) and the T-shaped condenser (4) for collecting the liquid condensed in the T-shaped condenser (4) and introducing it into a liquid-collecting tank (6) disposed outside the column, the column bottom (3) is connected with the falling-film reboiler (5); by a centrifugal pump (7) to form a high-speed circulating system, the column bottom (3) has a shape of elongated tube, and the falling-film reboiler (5) is of stumpy shell-and-tube. The rectification column for preventing thermal-sensitisation is used in the rectification separation process for preventing thermal-sensitisation of natural material.

Description

field of invention [0001] The invention relates to a natural material anti-heat-sensitive rectification separation process and equipment. Background technique [0002] Spices and other natural substances play an important role in the chemical, food, pharmaceutical and other industries. Natural flavors include animal flavors and plant flavors, among which musk, ambergris, etc. are more common in animal flavors; there are many types of plant flavors, such as essential oils, balsams, oleoresin, etc. Artificial flavors include some alcohols and esters. In chemical, petrochemical, pharmaceutical, food and other industries, separation devices are essential. Traditional distillation separations include batch separations (processes such as figure 2 shown) and continuous separation (process as image 3 shown), the batch separation process mainly includes a batch rectification tower, a heating device, and a condensation reflux device. The basic process is as follows: add ...

Claims

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Application Information

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IPC IPC(8): B01D3/26
Inventor 张志炳周政杨高东孙德芳张岭
Owner NANJING UNIV
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