SU1404501A1 - Method of producing humic acids from brown coal - Google Patents

Abstract

The invention relates to the production of fertilizers and can be used to produce organic fertilizers based on drill coal. The aim of the invention is to intensify the processes and increase the yield of humic acids. Brown coal is treated with ammonia at 20-30 ° C under the influence of ultrasonic vibrations with a frequency of 15-20 Hz. After 5 minutes, 96% of humic acids in the form of their water-soluble ammonium salts passes into the solution from brown coal, table 2. and s

Description

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The invention relates to the production of fertilizers and can be used to produce organic fertilizers based on brown coal,

The purpose of the invention is to intensify the process and increase the release of humic acids,

 II p and mep 1, 1 kg of a wide fraction of brown coal from 2 to 6 mm is loaded into a cylinder-shaped extraction reactor with an inner diameter of 50 mm and a height of 500 mm. 1000 ml are poured in there, ammonia water with an ammonia concentration of 10%, the brown coal – ammonia water system is subjected to the influence of the energy of the infrasonic radiation with a frequency of 15-20 Hz (infrasonic range of oscillations). Oscillatory motions in a liquid phase are excited by a vibrator powered from the mains by a voltage of U 380 V. Oscillations are transferred to the membrane in the bottom of the reactor, and from it flow into the volume of the reactor.

The extraction process is carried out at 20–25 ° C. After 5 minutes, 96% of the humic acids in the form of their water-soluble ammonium salts pass into the solution from brown coal,

The effect of temperatures (10-100 ° С) on the release of humic acids under the conditions of the influence of the energy of infrasonic vibrations with a constant frequency of

the interval of 20-23 Hz is given in table 1,

From Table 1 it follows that the temperature range of 20-25 ° C is optimal, at which the yield of humic acids is 96%,

The effect of the frequency of sound oscillations under conditions of a constant temperature is given in Table 2.

The data in Table 2 shows that the optimal value of infrasonic oscillations is a frequency of 15-20 Hz. According to the proposed method, the duration of extraction is 17-24 times reduced compared to the known, and the yield of humic acids increases 2.5-2.7 times. The use of short-wave sound waves with a frequency in the field of ultrasonic waves is inefficient,

Claims (1)

Invention Formula The method of separation of humic acids from brown coal, including the treatment of brown coal with ammonium solution, characterized in that, in order to intensify the process and increase the yield of humic acids, the process is carried out at 20-25 s under the influence of infrasonic vibrations with a frequency of 15-20 Hz, 20 72.4  five 20 23 20 21 22 20 83.0 9e, CJ 96.3 95.7 96.1 52, .4 5 6 Table 1 Temperature / s 24 20 25 25 25 7 56 5 96.2 96.7 90.0 15 1000 956 1000 995 Ammonia BO-L, see 1000 1000 1000 1000 1000 1000 table 2 20 98 120 36.5 1000 The ratio of the solid phase: liquid "1:10 1000