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Acetal production equipment and using method thereof

A technology for acetaldehyde diethyl acetal and production equipment, which is applied in the chemical industry and can solve the problems of reduced yield, trouble and the like

Pending Publication Date: 2021-03-26
NANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on the research on the preparation technology of acetal. Li Rulin, Wang Lin, etc. have reported using anhydrous hydrogen chloride or concentrated sulfuric acid to catalyze and absorb water with a water-absorbing agent. Processes such as distillation and purification are both troublesome and reduce yield

Method used

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  • Acetal production equipment and using method thereof
  • Acetal production equipment and using method thereof
  • Acetal production equipment and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] Embodiment 1 (the position of the collection port of the circulating reaction fluid is: axial 16cm, radial 76°)

[0124] 1. Equipment selection

[0125] 1. Key data of anti-tank separation:

[0126] Cylindrical section 100 has a diameter of 2m and a height of 0.5m, the upper circular platform section 101 has a height of 0.6m, and the lower circular platform section 102 has a height of 0.4m and a volume of 2.618m 3 . The r of the collection port 202 1 is 4.30cm, r 2 is 2.47cm, the r of the circulating fluid collection port 809 1 is 32.73cm, r 2 is 16.99cm, the r of the third collecting tube 703 1 18.76cm, r 2 is 13.71cm, the r of the second collection tube 702 1 is 12.99cm, r 2 The diameter of the first blocking disc 704 is 42.9 cm, and the diameter of the second blocking disc 705 is 26.4 cm.

[0127] 2. Supporting equipment: 3 plunger pumps (2.0L / min, power 200w) for feeding anhydrous ethanol, 1 plunger pump (2.0L / min, power 200w) for feeding acetaldehyde; plu...

Embodiment 2

[0163] Embodiment 2: The position of the collection port of the circulating reaction fluid is: 17.5 cm in the axial direction and 87° in the radial direction

[0164] 1. Reaction temperature, pressure, raw material ratio after realizing continuous reaction, operation process and gas chromatography analysis method are the same as in Example 1, the difference is that on the basis of Example 1, focus on adjusting the collection of circulating reaction fluid mouth position, in order to fully excavate the best operating conditions of the equipment.

[0165] 2. Let the axial reading of the circulating reaction fluid collection port 809 be Z, and take its lowest point as "z=0"; the radial reading is J, taking Figure 7 (c) is "j=0°", then the position of the circulating fluid collection port 809 in Embodiment 1 is a point (Z=16cm, J=76°). Starting from the point (Z=16cm, J=76°), first fix the J value, and measure a point every "1cm" of the Z value. When Z=17cm, through gas chromato...

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Abstract

The invention relates to acetal production equipment and a using method thereof. The acetal production equipment comprises a fractional reaction tank, wherein the fractional reaction tank is divided into an upper circular truncated cone section, a cylindrical section and a lower circular truncated cone section; the side wall of the cylindrical section is provided with a plurality of material feeding pipes for tangential feeding and circulating reaction fluid inlets located below the material feeding pipes; a water vapor collecting device is arranged at the top of the upper circular truncated cone section; and a sediment collecting device, an acetal collecting device and a circulating reaction fluid collecting device are arranged at the bottom of the lower circular truncated cone section. When the equipment is used, after water vapor and acetal in a reaction product are separated, absolute ethyl alcohol participating in the reaction is preheated through different heat exchangers; and one part of a separated and collected circulating reaction fluid is fed into the fractional reaction tank to participate in the reaction again, and the other part of the separated and collected circulating reaction fluid preheats acetaldehyde participating in the reaction through different heat exchangers and then enters the fractional reaction tank. According to the method, the process steps of acetal production are simplified, separation can be performed while reaction is performed, continuous production is realized, and the production cost of acetal is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a production equipment of acetaldehyde diethyl acetal and a method for using the equipment. Background technique [0002] Acetaldehyde diethyl acetal, also known as acetal, in addition to mentioning "acetaldehyde diethyl acetal" in this article, in order to simplify the description, "acetal" is used instead of "acetaldehyde diethyl acetal". It is an important safe spice, which can be applied in food, cosmetics, beverage and other industries. Because acetaldehyde, one of the raw materials for production, has active chemical properties and low boiling point (20.8°C), most of the preparation reactions using it as a raw material require low temperature conditions of 5-10°C. And therefore need to consume a large amount of "cooling capacity". Because of the low reaction temperature, the reaction speed is slow, and operations such as neutralization, acid removal ...

Claims

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Application Information

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IPC IPC(8): B01J19/24C07C41/56C07C41/58C07C43/303
CPCB01J19/0053B01J19/0073B01J19/2465C07C41/56C07C41/58B01J2219/00103C07C43/303
Inventor 王利亚陈俊玲李森兰李波
Owner NANYANG NORMAL UNIV
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