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Chlorination process of 2,4-dinitroaniline

A technology of dinitroaniline and process, which is applied in the field of chlorination process of 2,4-dinitroaniline, can solve the problems of inability to control the amount of feed well, troublesome operation of workers, etc., so as to reduce the difficulty of operation of workers, Effects of reducing residue and increasing reaction rate

Active Publication Date: 2019-12-24
浙江汇翔新材料科技股份有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0003] During the preparation reaction of 6-chloro-2,4-dinitroaniline, 2,4-dinitroaniline and other reactants need to be added to the mixing tank at the same time, but the existing mixing and feeding device requires workers to manually mix different Put the raw materials into a container and stir until they are evenly mixed, which not only cannot control the amount of feed well, but also troubles the workers to operate

Method used

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  • Chlorination process of 2,4-dinitroaniline
  • Chlorination process of 2,4-dinitroaniline
  • Chlorination process of 2,4-dinitroaniline

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[0027] A chlorination process of 2,4-dinitroaniline, the specific steps are: adding lignosulfonate to 2,4-dinitroaniline, then putting the mixture into water to suspend it in water; Add hydrochloric acid into the tank, then add 2,4-dinitroaniline suspension and sodium chlorate into the mixing tank at the same time, react to drive out excess chlorine, add sodium bisulfate to the reactant to decompose residual chlorine, filter, and wash to medium The product was obtained by drying; the hydrochloric acid concentration was 32%; the 2,4-dinitroaniline suspension and sodium chlorate were added to the mixing tank and stirred for 30 minutes, and then the excess chlorine was driven out through 30 minutes; the 2,4-Dinitroaniline suspension and sodium chlorate are added and stirred while the temperature of hydrochloric acid in the mixing tank is 25°C; the ratio of 2,4-dinitroaniline, lignosulfonate and water is 366:1: 440.

[0028] Such as Figure 1-12As shown, the top of the mixing ta...

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Abstract

The invention discloses a chlorination process of 2,4-dinitroaniline, which comprises the following specific steps: adding lignosulfonate into 2,4-dinitroaniline, and putting the mixture into water tosuspend in water; adding hydrochloric acid into a stirring barrel, simultaneously adding 2,4-dinitroaniline suspension and sodium chlorate into the stirring barrel for a reaction to expel excessive chlorine, adding sodium bisulfate into reactants to decompose residual chlorine, and filtering the liquid, washing the reaction product to be neutral, and drying the reaction product to obtain the 2,4-dinitroaniline.

Description

technical field [0001] The invention belongs to the technical field of chemical material processing, and in particular relates to a chlorination process of 2,4-dinitroaniline. Background technique [0002] The molecular formula of 6-chloro-2,4-dinitroaniline is C6H4BrN304, the molecular weight is 26203, and the melting point is 153-154°C. Easy sublimation. Soluble in hot water and hot acetone, soluble in hot acetic acid. It can be used in the production of indigo dyes and intermediates of some acid dyes. It can make the color of the dye itself bright and improve the colorability and fastness of the dye. 6-Chloro-2,4-dinitroaniline is a fine chemical intermediate with development potential. [0003] During the preparation reaction of 6-chloro-2,4-dinitroaniline, 2,4-dinitroaniline and other reactants need to be added to the mixing tank at the same time, but the existing mixing and feeding device requires workers to manually mix different Put the raw materials into a cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J4/00B01J4/02B01J19/18C07C201/12C07C205/12
CPCB01J4/007B01J4/02B01J19/18B01J2204/002C07C201/12C07C205/12
Inventor 阮煜翔金海
Owner 浙江汇翔新材料科技股份有限公司
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