A method of obtaining a granulated chlorophos

 

(57) Abstract:

The invention relates to the production of insecticides, namely, to obtain granulated chlorophos. The method is realized by the processing of powdery chlorophos in the fluidized bed, it differs by the fact that in the last create a separate gushing areas in which it serves the agent is heated above the melting temperature of the powder chlorophos, mainly to 80-100oC and pseudoviruses agent serves heated to 60-75oC. the Technical result is to simplify the process of obtaining high-grade granulated chlorophos. 2 Il., table 1.

The invention relates to chemical technology, namely for the manufacture of granular insecticide - chlorophos.

A method of obtaining stable insecticidal granules containing chlorophos as the active substance and the silicate of cerium as a carrier (accepted Japan's bid N 74-494, MKI A 01 N 9/36, publ. 1974 RICH 17 H 643). Pellets obtained by extrusion of a mixture of chlorophos and media.

The disadvantage of this method is the use of media, expiring after using chlorophos in deadweight loss and the cost of the introduction of media into pellets. the wettable powder pesticides, including chlorophos, with the content of the active ingredient 50 % and particle size of 3 to 40 μm, which consists in the fact that the flow of fluid carrier white carbon black, heated to 80oC, serves the melt with chlorophos so pl. 75oC (ed.mon. The USSR 1078835, MKI C 05 G 3/02, 1986).

The disadvantage of this method is the use of media and, accordingly, the low concentration of active ingredient in the granules.

The task to be solved by the invention, is to obtain high-grade granulated chlorophos and simplification of the way.

This task is solved in that in the known method of granulating powder chlorophos fluid flow, the latter creates a separate gushing areas in which it serves the agent is heated above the melting temperature of chlorophos, mainly to 80-100oC and pseudoviruses agent serves heated to 60-75oC.

The method is as follows: in the fluidized bed apparatus serves pre-dried powder of chlorophos, which result in a fluidized state by the flow of fluidizing agent (air or nitrogen) heated to 60-75oC, through gazoraspredelitelnye nozzles or orifices to deliver air or nitrogen, heated to 80-100oC. in the fluidized bed formed separate flowing sections with a flow temperature of 80-100oC. under these conditions, some of the powder in the area gushing plots popravlyaetsya and due to the lower temperature siraudeau agent solidifies into pellets with different diameters. The mixture of powder and granules classified. Commodity fraction of granules with an outer diameter of 2.5 mm is fed to the packaging, large granules with a diameter of more than 2.5 mm serves to grind. Grinding (destroyed granules) together with nepodpravena powder serve as Remora.

This process can be performed in a separate granulator or can be combined with a process of drying in the dryer-granulator.

Example 1. The process is conducted in the dryer-granulator, fluidized bed volume of 10 DM3. The diagram of the apparatus shown in Fig. 1. The apparatus includes a housing 1, a mechanical booster 2 motor 3, in the lower part of the body is naturally grating 4 with holes 5 for supplying fluidizing agent in the gas distribution grid is mounted inkjet dispenser with 6 nozzles 7. The device is also equipped with a piping system for supplying fluidizing agent, create Fontana lattice (top view).

Powder chlorophos in the amount of 850 g is loaded into the apparatus, under the gas distribution grid serving the air, heated to 60oC with linear velocity in each hole 11 m/s and include mechanical booster. To create flowing sections through the nozzle discharge air heated to 90oC, with a linear velocity in the nozzle 3 m/s. The process is continued for 10-15 minutes. The mixture of pellets and powder upload and categorize. Output of marketable fraction granules (up to 2.5 mm) was 20% of the mass from the number of loaded powder.

The quality indicators received marketable fractions of granules, in comparison with powder chlorophos shown in the table.

The content of the basic substance and the acidity in the granulation process are not changed.

A method of obtaining a granulated chlorophos processing of powdery chlorophos fluid flow, characterized in that in the latter create a separate gushing areas in which it serves the agent is heated above the melting temperature of the powder chlorophos, predominantly 80 - 100oC and pseudoviruses agent serves heated to 60 - 75oC.

 

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