Whole-process continuous phenylacetonitrile production device and process

A technology of production device and production process, which is applied in the fields of organic chemistry, cyanide reaction preparation, and carboxylic acid nitrile purification/separation, etc., can solve the problems of incapable of continuous production and insufficient production efficiency, and achieves a safe, stable and environmentally friendly production process and a production cycle. The effect of shortening and improving production efficiency

Active Publication Date: 2020-06-09
青岛雪洁助剂有限公司
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  • Abstract
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Problems solved by technology

[0008] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a full-process continuous benzyl nitrile production device and process, to solve the problem that the benzyl nitrile production process in the prior art cannot realize the continuous production of the whole process and cause insufficient production efficiency. technical problem

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  • Whole-process continuous phenylacetonitrile production device and process

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Embodiment 1

[0047] Comply with the above technical solutions, such as figure 1 As shown, the present embodiment provides a kind of whole-process continuous phenylacetonitrile production device, including successively connected reaction unit 1, washing unit 2, evaporative dehydration unit 3, light component removal unit 4 and product rectification unit 5 ;

[0048] Reaction unit 1 comprises benzyl chloride high level tank 101 links to each other with first preheater 103 by first metering pump 102; Sodium cyanide high level tank 104 links to each other with second preheater 106 by second metering pump 105; The device 103 and the second preheater 106 are respectively connected to the feed port of the tangential flow reactor 107, and the discharge port of the tangential flow reactor 107 is connected to the feed port of the first reaction mixed liquid temporary storage tank 108;

[0049] The washing unit 2 comprises a first oil-water membrane separator 201, the feed port of the first oil-wate...

Embodiment 2

[0057] The present embodiment provides a kind of continuous benzyl nitrile production technique of whole process, and this technique adopts the continuous benzyl nitrile production device of full process as in embodiment 1;

[0058] Specifically, in the reaction unit 1, two reaction sections are arranged in the tangential flow tubular reactor 107, the temperature of the first reaction section is 65-75°C, the residence time is 5-15min, and the temperature of the second reaction section is 50-60°C, the residence time is 5-15min, and the reaction pressure in the tangential flow tube reactor 107 is 0.1-0.2Mpa.

[0059] Specifically, in reaction unit 1, the mol ratio of raw material benzyl chloride and sodium cyanide is 1.0:1.05, and the concentration of sodium cyanide is 30wt.%; The sodium cyanide in the sodium cyanide head tank 104 is mixed with the phase transfer catalyst , the phase transfer catalyst is benzyl tributyl ammonium chloride, and the mass ratio of benzyl tributyl am...

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Abstract

The invention provides a whole-process continuous phenylacetonitrile production device and process. The whole-process continuous phenylacetonitrile production device comprises a reaction unit, a washing unit, an evaporation dehydration unit, a light component removal unit and a product rectification unit which are connected in sequence. The reaction unit comprises a tangential flow reactor. The washing unit comprises an oil-water film separator and a pipeline mixer. The evaporation dehydration unit comprises a falling film evaporator. The light component removal unit comprises a first rectification tower. The product rectification unit comprises a second rectification tower. A continuous production method is adopted in the whole production process of the phenylacetonitrile, the productionperiod is greatly shortened, the production process is safer, more stable and more environmentally friendly, and the production efficiency is remarkably improved. As the tangential flow reactor has the structural characteristics of small reaction space, large specific surface area and arrangement of a stirring device, mass transfer and heat transfer in the reaction process can be enhanced, and thewhole reaction system is small in occupied area, smooth in reaction process and free of channel blockage.

Description

technical field [0001] The invention belongs to the field of organic synthesis technology, relates to the production of benzyl nitrile, in particular to a whole-process continuous benzyl nitrile production device and process. Background technique [0002] Phenylacetonitrile is an oily liquid organic compound used as a raw material for organic synthesis, relative density (water=1): 1.02, this substance is flammable and irritating, and headache, dizziness, nausea, vomiting, drowsiness, upper respiratory tract Irritation, loss of sanity, and even death. There are two main production methods of phenylacetonitrile, one is benzyl chloride and sodium cyanide method; the other is phenylacetic acid amide dehydration method. At present, the first method is commonly used in industry, but because the raw materials and products used in this method are harmful, toxic or even hugely toxic substances, the production process is relatively harmful to workers, and a large amount of toxic and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C253/14C07C255/33C07C253/34
CPCC07C253/14C07C253/34C07C255/33Y02P20/10
Inventor 刘湛刘林学李建民
Owner 青岛雪洁助剂有限公司
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