Method and device for producing benzyl benzoate

A technology of benzyl benzoate and benzoic acid, which is applied in the field of benzyl benzoate production, can solve problems such as benzyl benzoate that cannot be solved, and achieve the effects of improving economic benefits, reducing waste of resources, and simple device flow

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the patent application does not address the production of benzyl benzoate from the by-product of benzoic acid production

Method used

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  • Method and device for producing benzyl benzoate
  • Method and device for producing benzyl benzoate
  • Method and device for producing benzyl benzoate

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] The present invention produces the device of benzyl benzoate, as figure 1 As shown, including reactive distillation column 17, cooler 18, reboiler 2, reflux pump 23, rectification column 7, steam drum 6, external condenser 8, product cooler 15, reboiler 16 and feed pump 3. Such as figure 2 As shown, the rectification tower is provided with a rectification tower inlet 4 , a tower top gas outlet 9 , a light fraction outlet 11 , a product outlet 13 , a recycle inlet 14 and a heavy component outlet 5 . There are three packing layers 12 in the rectification tower, the packing of the packing layers is 500Y structured packing, and the packing support 24 is arranged at the lower part of the packing. The rectification column is provided with a liquid collector 20 and a liquid distributor 21 , the liquid collector is located on the upper part of each ...

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Abstract

The invention relates to a method and a device for producing benzyl benzoate. The device comprises a reaction and rectification tower and a rectification tower and is further connected with a benzaldehyde tower of a benzaldehyde device. The benzaldehyde tower is connected to an inlet of the rectification tower through the reaction and rectification tower, a gas outlet at the tower top of the rectification tower is connected to a gas treatment unit through an external condenser, a light fraction outlet and a heavy component outlet are respectively connected to a benzaldehyde distillation tower, and a product outlet is connected to a product tank through a product cooler. After reaction in the reaction and rectification tower, heavy component residual oil raw material at the bottom of the benzaldehyde tower enters the rectification tower to be rectified and separated; a product, namely benzyl formate, flows out of the middle part of the rectification tower and enters the product tank after heat exchange, gas components in the material flow out of the tower top, light fractions flow out of the upper part of the rectification tower, and heavy components flow out of the bottom of the tower. According to the method and the device, provided by the invention, byproducts produced by benzoic acid are fully utilized to produce the benzyl formate through the reaction and rectification process, the waste of resources is reduced and avoided, the economic benefits are improved, the emission of chemical pollutants is reduced, and the method and the device are further conductive to environmental protection.

Description

technology field, [0001] The invention belongs to the technical field of chemical product production, and relates to a method and device for producing benzyl benzoate, in particular to a method and device for producing benzyl benzoate as a raw material by the heavy by-product at the bottom of the benzaldehyde tower in the production of benzoic acid . Background technique [0002] Benzyl benzoate is a good high-temperature solvent, the only solvent for musk, and has good plasticizing properties. It is mainly used in the fields of textile auxiliaries, flavors, pharmaceuticals and plasticizers. In the textile industry, it is mainly used as a dyeing agent, leveling agent and repairing agent. With the development of the textile industry, clothing fabrics are becoming more and more high-grade, and its coloring and level dyeing are becoming more and more difficult, so the demand for benzyl benzoate is increasing. At present, the production method of phenylbenzyl benzoate in ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/78C07C67/08
CPCC07C67/08C07C69/78
Inventor 王志侃许春建霍建竹李金发
Owner CHINA PETROLEUM & CHEM CORP
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