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Catalytic reaction rectification production method and device for high-purity natural benzaldehyde

A catalytic reaction, benzaldehyde technology, applied in the chemical industry, organic chemistry, hydrolysis to prepare carbonyl compounds and other directions, can solve the problems of the influence of reaction conversion rate and reaction rate, cannot be further improved, and the concentration of reactants is reduced, etc. The yield of natural benzaldehyde, the effect of saving equipment investment and reducing operating costs

Active Publication Date: 2012-11-07
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this reaction is a kind of reversible reaction, along with the carrying out of reaction, the content of natural benzaldehyde in the reaction mixture increases gradually, and reactant concentration reduces gradually, and reaction rate constantly declines, and the final conversion rate of reaction is limited by chemical equilibrium, cannot obtain Further improvement, therefore, the reaction conversion rate and reaction rate are affected to a certain extent
At present, there are no relevant patents and reports on the application of catalytic reaction distillation technology in the production process of natural benzaldehyde

Method used

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  • Catalytic reaction rectification production method and device for high-purity natural benzaldehyde
  • Catalytic reaction rectification production method and device for high-purity natural benzaldehyde
  • Catalytic reaction rectification production method and device for high-purity natural benzaldehyde

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Embodiment 1

[0032] The method of the present invention is used in the hydrolysis of cinnamon oil to produce natural benzaldehyde process under alkaline conditions, and the processing capacity of cinnamon oil is 10kg / h, which is the same as the flow process described in the present invention, including catalytic reaction rectification tower, tower top condenser, tower The top reflux storage tank and the extraction pump at the bottom of the tower. Since the process requires purification at the top of the tower and purification at the bottom of the tower, the catalytic reaction distillation tower is as follows: figure 1 As shown, it consists of rectification section (4), catalytic reaction section (5) and stripping section (6). The absolute pressure of the catalytic reaction rectification tower is 100Pa, the reflux ratio of the catalytic reaction rectification tower is 2, the mass ratio of feed water vapor to cinnamon oil is 2, and the catalyst consumption is 32kg / m 3 , the content of cinnam...

Embodiment 2

[0037] The method of the present invention is used in the hydrolysis of cinnamon oil to produce natural benzaldehyde process under alkaline conditions, and the processing capacity of cinnamon oil is 1000kg / h, which is the same as the flow process described in the present invention, including catalytic reaction rectification tower, tower top condenser, tower The top reflux storage tank and the extraction pump at the bottom of the tower. Since the process only requires purification at the top of the tower, the catalytic reaction distillation tower is as follows: figure 2 As shown, it consists of a rectification section (4) and a catalytic reaction section (5). The absolute pressure of the catalytic reaction distillation column is 100kPa, the reflux ratio of the catalytic reaction distillation column is 18, the mass ratio of feed water vapor to cinnamon oil is 30, and the catalyst usage is 300kg / m 3 , the content of cinnamaldehyde in cinnamon oil is 85%.

[0038] After the abov...

Embodiment 3

[0042] The method of the present invention is used in the process of producing natural benzaldehyde by hydrolysis of cinnamon oil under alkaline conditions, and the processing capacity of cinnamon oil is 100kg / h, which is the same as the flow process described in the present invention, including catalytic reaction rectification tower, tower top condenser, tower The top reflux storage tank and the extraction pump at the bottom of the tower. Since the process only requires purification at the bottom of the tower, the catalytic reaction distillation tower is as follows: image 3 As shown, it consists of catalytic reaction section (5) and stripping section (6). The absolute pressure of the catalytic reaction distillation column is 10kPa, the reflux ratio of the catalytic reaction distillation column is 10, the mass ratio of feed water vapor to cinnamon oil is 15, and the catalyst usage is 110kg / m 3 , the content of cinnamaldehyde in cinnamon oil is 75%.

[0043] After the above p...

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Abstract

The invention provides a method and a device for a catalytic reaction rectification technology for producing high-purity natural benzaldehyde. A cinnamon oil feeding opening is arranged at the top of a catalytic reaction rectification section; a water steam feeding opening is arranged at the bottom of a catalytic reaction rectification tower; a hydrolysate natural benzaldehyde can be extracted from the tower top of the catalytic rectification tower; and residual oil is discharged out from the tower bottom of the catalytic reaction rectification tower. The method and the device disclosed by the invention are characterized in that reactant raw materials for producing the natural benzaldehyde are cinnamon oil and water. By utilizing the method disclosed by the invention to produce the natural benzaldehyde, cinnamyl aldehyde in the cinnamon oil does not need to be separated and purified, and the cinnamon oil can be directly used as the raw material to react. The method and the device disclosed by the invention have the advantages that two unit operations including a reaction for hydrolyzing the cinnamyl aldehyde to be natural benzaldehyde, and purification, rectification and separation of benzaldehyde are organically coupled in one equipment to be carried out at the same time, so that equipment investment is saved and subsequent operation cost is further reduced.

Description

technical field [0001] The invention relates to the technical field of production of natural benzaldehyde in the field of fine chemical industry, in particular to a method and a device for producing natural benzaldehyde by hydrolyzing cinnamon oil under alkaline conditions using catalytic reaction rectification technology. Background technique [0002] my country is rich in cinnamon resources, and cinnamon oil has always been a traditional export commodity in my country, especially in Guangxi. The production of natural benzaldehyde from cinnamon oil is one of the important ways to solve the shortage of natural benzaldehyde, and it is also one of the effective means to solve the further deep processing of cinnamon oil in my country. [0003] Benzaldehyde is an important fine chemical product and the second most important fragrance. It is widely used in the production of medicines, fragrances and dyes. Compared with benzaldehyde produced by chemical synthesis, natural benzalde...

Claims

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Application Information

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IPC IPC(8): C07C47/54C07C45/42
CPCY02P20/10
Inventor 李洪高鑫李鑫钢姜斌张劲松杨振明
Owner TIANJIN UNIV
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