SU1586771A1 - Apparatus for continuous diazotization of amines - Google Patents

Abstract

The invention relates to mass transfer devices and allows for improved performance. The apparatus for the continuous diazotization of amines contains a body filled with inert bodies, a drum for tangentially introducing reagents with an internal cone and nozzles, the apparatus body being made in the form of a truncated cone with a large base upwards and provided with tubular channels attached tangentially to its external surface. The direction of attachment of the upper parts of the tubular channels is opposite to the lower, coinciding direction of attachment with the direction of supply of the reactants. 2 hp f-ly, 4 ill.

Description

This invention relates to fine organic synthesis and can be used in the chemical industry in the production of pigments and dyes.

The purpose of the invention is to increase productivity and improve product quality.

FIG. 1 shows a diagram of the apparatus; FIG. 2 is a section A — A of FIG. one; FIG. 3 is a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. one.

The apparatus, up to continuous diazotization of the amines, comprises a housing 1. made in the form of a truncated cone with a large base upwards to slacken the rotation of the swirling flow along the height of the apparatus, a drum 2 with a cone 3 to form a uniform swirling flow. On the outer side of the housing 1 of the apparatus there are three tubular channels 4 for organizing the circulation of inert bodies and amine particles. To prevent the inert bodies from being carried away from the reaction zone, a mesh 5 is located in the upper part of the apparatus. The nozzle 6 serves to divert the diazo compound. Case 1 is filled with inert bodies 7. Inlet drum 8 are located on the drum 2.

The device works as follows.

The streams of amine and sodium nitrite are injected under high pressure into the body 1 of the apparatus through a drum 2c with a cone 3, where, mixing and entering into chemical interaction, they act on inert bodies and bring them into suspension. This forms an annular swirling flow of the reaction mass together with inert bodies 7. The inert bodies 7, which collide with each other and with the wall of the apparatus, mechanically act on the amine particles, thus renewing the surface of the contact of the phases, as a result of which the diazotization rate increases. Inert bodies and amine particles by centrifugal action

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Noah forces roll around the side surface of the housing 1. In the upper part of the apparatus, some inert bodies with insoluble amine particles fall into the tubular channels 4. In channels 4, under the action of gravity, the contents are lowered into their lower part, which promotes the capture of particles by the reaction mass and ejection in the main swirling flow of the reaction mass. The diazoconnection obtained is continuously withdrawn from the apparatus through a fitting 6 located above the safety net 5.

The tubular 1 canals 4 are attached by their upper and lower parts to the forming body 1 tangentially. The direction of attachment of the lower parts of the tubular channels coincides with the direction of the tangential connection of the inlet nozzles 8 to the drum 2, i.e. coincides with the direction of rotation of the reaction mass in the internal cavity of the apparatus, which contributes to a better discharge of the contents of the tubular channels 4 into the flow of the reaction mass.

The direction of attachment of the upper parts of the tubular channels 4 is opposite to the direction of attachment of their lower parts, i.e. opposite to the direction of rotation of the reaction mass in the apparatus.

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which contributes to better capture channels 4 of the reaction mass stream in the upper part of the apparatus.

Due to this connection, the tubular channels 4 are arranged to circulate inert bodies 7 and large amine particles in the apparatus until the latter are completely dissolved.

Claims (2)

1. An apparatus for continuous diazotization of amines, comprising a housing, a means for supplying reagents, a fitting for withdrawing a finished product, characterized in that, in order to increase the productivity of the apparatus and improve the quality of the final product, it is equipped with tubular channels attached tangentially to the outer surface of the housing , made in the form of a truncated inverse truncated cone, in the lower part of which is placed the means for supplying reagents, made in the form of a drum with a conical cross-section and branch pipes, while the upper part of the pipe bchatyh channels connected in a direction opposite the bottom, which coincides with the direction of feed of reactants. 2. The apparatus according to claim 1, characterized in that the body is filled with inert bodies. b 9g.1 F1 / gi