SU43775A1 - The method of preparation of the composition for the destruction of larvae of the minor mosquito in reservoirs - Google Patents

Description

The control of the larvae of the malaria mosquito in water industry is carried out in all countries of Zap. Europe and America by means of the Parisian greens by spraying it from an airplane.

The work of the Tropical Institute of the People's Commissariat of Health of the RSFSR proved that it is possible to use Parisian herbs and in our conditions, but the use of this drug in the USSR is largely limited by the deficiency of copper, arsenic, acetic acid and soda needed to produce Parisian herbs. According to the only plant in the Union that produces Parisian greens (Schelkovsky Moscow), the production of one ton of greens requires:

white mouse ka0.579 gan

Calciners. soda .... 0.480 „

copper sulphate .... 1,028 „

acetic acid .... 0.125 „

The replacement of Parisian greenery is the proposed preparation, the expenditure ratios of which per ton are as follows:

white mouse ka0,100 tk

copper sulphate .... 0,235,.

mela0,750 „

asidola0,030 „

From the comparison of expendables, it is clear that for the production of

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The proposed preparation requires a mouse almost 6 times, and copper almost 5 times less than for Paris greenery. Soda and acetic acid are not required at all.

The analysis of the usual Parisian greens gives that it contains AoD 53 ° / o, CuO 28-30%, while the proposed preparation contains AyOg, CuO 7 - 8%. The preparation was tested by the Tropical Institute both in laboratory and in operational conditions, against the larvae of the minor mosquito, and positive results were obtained.

The demand for the proposed drug is increasing every year, so that in the last year of the second p-tillet 2500 tons were expected for the xHj industry. him.

The preparation of the proposed preparation consists in the fact that chalk, asidol and copper sulphate are introduced into the white mouse solution in hot water successively in the above quantities, with constant stirring. The precipitate formed is squeezed on a filter press or a filter, dried, ground, and packaged. A completely homogeneous preparation is obtained, the particle of which is a carrier yes.

The preparation possesses high navigational properties - retention on the surface of water and low hygroscopicity, which compares favorably with the Parisian greenery.

The filtrate obtained in the production of the proposed preparation contains only minor amounts of gypsum (2 g per 1 liter) and mouse traces and can be used in the production of the following batches of the preparation. The latter ensures 100% / oh of the use of raw materials and completely eliminates wastewater, which is important in sanitary terms.

When using the drug, it is not necessary to dilute it with peat flour or any other lightweight mechanical impurities, as is done with Parisian herbs, which saves you from unnecessary labor and money.

The subject matter of the invention.

The method of preparation of the composition for the destruction of the larvae of the minor mosquito in water bodies, is based on the fact that chalk, acidol and copper sulphate are successively injected into the white mouse's aqueous solution in such quantities as to form a precipitate after squeezing it out on a filter press or filter. Succinating, drying and grinding contained 9–10 ° / o mouse of malleable anhydride and 7-S- / o of copper oxide.