System and technology for producing benzaldehyde by utilizing benzyl chloride and benzyl alcohol waste materials

A technology of benzyl alcohol and benzaldehyde, applied in the field of benzaldehyde production, to achieve the effect of solving environmental protection problems, simple process and easy separation

Active Publication Date: 2015-08-19
LIAOCHENG LUXI CHEM ENG DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Production of benzaldehyde from dibenzyl ether by high temperature air oxidation

Method used

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  • System and technology for producing benzaldehyde by utilizing benzyl chloride and benzyl alcohol waste materials
  • System and technology for producing benzaldehyde by utilizing benzyl chloride and benzyl alcohol waste materials
  • System and technology for producing benzaldehyde by utilizing benzyl chloride and benzyl alcohol waste materials

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A device for producing benzaldehyde by using benzyl chloride and benzyl alcohol waste, including main equipments of oxidation furnace, oxidation kettle, hydrolysis kettle, alkaline hydrolysis kettle, crude distillation tower, crude distillation kettle and rectification tower.

[0029] The process flow is as follows: the raw material dibenzyl ether is transported to the oxidation tower, transfers mass and heat with the rising gas in the oxidation tank, enters the main oxidation tank, and reacts with oxygen in the compressed air in the main oxidation tank to form benzaldehyde, and the reaction product Enter the settling tank for oil-water separation, and the crude product containing benzaldehyde ≥ 80% is obtained and sent to the crude product storage tank for standby.

[0030] The hydrolyzate and benzyl dichloride are continuously added to the hydrolysis kettle, and the temperature is raised by low-pressure steam, and a hydrolysis reaction occurs in the hydrolysis kettle. ...

Embodiment 2

[0033] A system for producing benzaldehyde by utilizing benzyl chloride and benzyl alcohol waste, comprising a dibenzyl ether oxidation unit, a benzyl dichloride treatment unit, and a multistage rectification unit,

[0034] The dibenzyl ether oxidation device comprises an oxidation tower, an oxidation still, a settling tank, and a crude product storage tank, and the oxidation tower, an oxidation still, a settling tank, and a crude product storage tank are connected in sequence, and the top exhaust port of the oxidation tower is connected to the air preheater The second air inlet at the top is connected, the first air outlet at the bottom of the air preheater is connected with the air inlet at the bottom of the oxidation tower, the second air outlet at the bottom of the air preheater is connected with the air inlet of the oxidation kettle, and the crude product The discharge port of the storage tank is connected with the feed port of the rectification tower;

[0035] Benzyl dic...

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PUM

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Abstract

The invention provides a system and a technology for producing benzaldehyde by utilizing benzyl chloride and benzyl alcohol waste materials. The system comprises the main equipment of an oxidizing furnace, an oxidizing kettle, a hydrolyzing kettle, an alkaline hydrolysis kettle, a crude distillation tower, a crude distillation kettle and a rectifying tower. The technological process is simple. The technology solves the discharging problem of the benzyl chloride and benzyl alcohol waste materials, namely dibenzyl ether and benzyl chloride, the waste materials are changed into treasure, and benzaldehyde products with a higher added value are produced. The environmental protection problem is solved, and economic benefits are also created.

Description

technical field [0001] The invention relates to the field of benzaldehyde production, in particular to a system and a process for producing benzaldehyde by using benzyl chloride and benzyl alcohol waste. technical background [0002] The bottom materials produced by the rectification of benzyl chloride products and benzyl alcohol products of the company are mainly dichlorobenzyl ether and dibenzyl ether. In order to solve the problem of the discharge of these two wastes and turn waste into treasure at the same time, these two materials are used as raw materials Production of benzaldehyde. Benzaldehyde is an important chemical raw material, which can be used in the production of aniline, benzophenone and insecticides. It is also the most basic raw material for benzaldehyde-based fragrances and the most basic raw material for the synthesis of certain pharmaceutical products and plastic additives. Contents of the invention [0003] The invention relates to a process for prod...

Claims

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Application Information

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IPC IPC(8): C07C47/54C07C45/37C07C45/43
CPCC07C45/37C07C45/43C07C47/54
Inventor 肖光蘭清军袁甫荣张文杰李怀坤张明慧康健牛东芳黄丽娜田兵田
Owner LIAOCHENG LUXI CHEM ENG DESIGN
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