The present disclosure provides a method for preparing resorcinol through micro-channel reaction. In the method, resorcinol is prepared through micro-channel reaction using m-aminophenol as a raw material, a diazo salt is synthesized at 0° C. or more, hydrolysis of the diazo salt is performed at 90° C. or less, and then reaction conditions are reduced; the reaction time is decreased from traditional 10 hours to less than 2 minutes, and therefore the reaction time is significantly shortened; the purity of a product is 75% or more, which is significantly improved. The method provided by the present disclosure has high heat exchange efficiency and high mass transfer rate; the efficiency of reaction is improved by hundreds of times; the reaction system is precisely controlled in the temperature and pressure, and safe and reliable in process, and meanwhile is capable of stably controlling hazard processes such as diazotization, so as to promote safe industry production, reduce energy consumption and greatly reduce industrial hazard waste emission and realize green ecology development.

The present disclosure provides a method for preparing resorcinol through micro-channel reaction. In the method, resorcinol is prepared through micro-channel reaction using m-aminophenol as a raw material, a diazo salt is synthesized at 0° C. or more, hydrolysis of the diazo salt is performed at 90° C. or less, and then reaction conditions are reduced; the reaction time is decreased from traditional 10 hours to less than 2 minutes, and therefore the reaction time is significantly shortened; the purity of a product is 75% or more, which is significantly improved. The method provided by the present disclosure has high heat exchange efficiency and high mass transfer rate; the efficiency of reaction is improved by hundreds of times; the reaction system is precisely controlled in the temperature and pressure, and safe and reliable in process, and meanwhile is capable of stably controlling hazard processes such as diazotization, so as to promote safe industry production, reduce energy consumption and greatly reduce industrial hazard waste emission and realize green ecology development.

The present disclosure provides a method for preparing resorcinol through micro-channel reaction. In the method, resorcinol is prepared through micro-channel reaction using m-aminophenol as a raw material, a diazo salt is synthesized at 0° C. or more, hydrolysis of the diazo salt is performed at 90° C. or less, and then reaction conditions are reduced; the reaction time is decreased from traditional 10 hours to less than 2 minutes, and therefore the reaction time is significantly shortened; the purity of a product is 75% or more, which is significantly improved. The method provided by the present disclosure has high heat exchange efficiency and high mass transfer rate; the efficiency of reaction is improved by hundreds of times; the reaction system is precisely controlled in the temperature and pressure, and safe and reliable in process, and meanwhile is capable of stably controlling hazard processes such as diazotization, so as to promote safe industry production, reduce energy consumption and greatly reduce industrial hazard waste emission and realize green ecology development.

The present disclosure provides a method for preparing resorcinol through micro-channel reaction. In the method, resorcinol is prepared through micro-channel reaction using m-aminophenol as a raw material, a diazo salt is synthesized at 0° C. or more, hydrolysis of the diazo salt is performed at 90° C. or less, and then reaction conditions are reduced; the reaction time is decreased from traditional 10 hours to less than 2 minutes, and therefore the reaction time is significantly shortened; the purity of a product is 75% or more, which is significantly improved. The method provided by the present disclosure has high heat exchange efficiency and high mass transfer rate; the efficiency of reaction is improved by hundreds of times; the reaction system is precisely controlled in the temperature and pressure, and safe and reliable in process, and meanwhile is capable of stably controlling hazard processes such as diazotization, so as to promote safe industry production, reduce energy consumption and greatly reduce industrial hazard waste emission and realize green ecology development.

The present disclosure provides a method for preparing resorcinol through micro-channel reaction. In the method, resorcinol is prepared through micro-channel reaction using m-aminophenol as a raw material, a diazo salt is synthesized at 0° C. or more, hydrolysis of the diazo salt is performed at 90° C. or less, and then reaction conditions are reduced; the reaction time is decreased from traditional 10 hours to less than 2 minutes, and therefore the reaction time is significantly shortened; the purity of a product is 75% or more, which is significantly improved. The method provided by the present disclosure has high heat exchange efficiency and high mass transfer rate; the efficiency of reaction is improved by hundreds of times; the reaction system is precisely controlled in the temperature and pressure, and safe and reliable in process, and meanwhile is capable of stably controlling hazard processes such as diazotization, so as to promote safe industry production, reduce energy consumption and greatly reduce industrial hazard waste emission and realize green ecology development.

The invention relates to a process for the preparation of 5-bromo-1,3-dichloro-2-fluoro-benzene by diazotization and reduction of 6-bromo-2,4-dichloro-3-fluoro-aniline, which is obtained by bromination of 2,4-dichloro-3-fluoro-aniline, which is obtained by reduction of 1,3-dichloro-2-fluoro-4-nitro-benzene, and a process for preparing active compounds of formula V (Formula V) wherein the variables are defined in the specification by further transforming 5-bromo-1,3-dichloro-2-fluoro-benzene obtained from 2,4-dichloro-3-fluoro-aniline by the process according to the invention.

##STR00001##

The present invention generally relates to processes for the catalytic hydrogenation of halonitroaromatics. In particular, the present invention includes processes for the catalytic hydrogenation of halonitroaromatics such as 2,5-dicloronitrobenzene to 2,5-dichloroaniline over a platinum-containing catalyst. The present invention also relates to processes for producing 3,6-dichloro-2-methoxybenzoic acid.

The present invention generally relates to processes for the catalytic hydrogenation of halonitroaromatics. In particular, the present invention includes processes for the catalytic hydrogenation of halonitroaromatics such as 2,5-dicloronitrobenzene to 2,5-dichloroaniline over a platinum-containing catalyst. The present invention also relates to processes for producing 3,6-dichloro-2-methoxybenzoic acid.

The present invention generally relates to processes for the catalytic hydrogenation of halonitroaromatics. In particular, the present invention includes processes for the catalytic hydrogenation of halonitroaromatics such as 2,5-dicloronitrobenzene to 2,5-dichloroaniline over a platinum-containing catalyst. The present invention also relates to processes for producing 3,6-dichloro-2-methoxybenzoic acid.

The present invention generally relates to processes for the catalytic hydrogenation of halonitroaromatics. In particular, the present invention includes processes for the catalytic hydrogenation of halonitroaromatics such as 2,5-dicloronitrobenzene to 2,5-dichloroaniline over a platinum-containing catalyst. The present invention also relates to processes for producing 3,6-dichloro-2-methoxybenzoic acid.