SU550568A1 - Method for quantitative determination of flotation reagent concentration - Google Patents

Description

potassium ferro-ferricyanide or ferroferricinity system. The determination of the concentration of flotation agents containing fatty acids is carried out as follows.

Prepare a solution containing a defined amount of an alkaline or neutral aqueous solution, a reversible redox system (OVS) containing simultaneously oxidized and reducing forms of the sample, immerse the electrodes of the galvanic cell into the prepared solution

Yr I I KCl, Hg, Cl, I Hg. (1)

The EMF measurement of the electrode 3 is carried out by a compensation method. Upon reaching a constant EMF value, the test sample is added to the prepared solution. The moment of introduction of the sample is recorded and taken as the time reference. The magnitude of the EMF (Dfg) is measured at equal intervals of time. At each time point, the amount of oxidant spent on oxidation (reduction) can be calculated by the formula

g °

f-ox

A, -, o 591g,

p-591g

g °

red y

red

where Et is the emf of electrode 3 at the moment of time; ЕО - EMF of electrode 3 at the moment of beginning

countdown;

X is the amount of oxidizing agent and the equivalent of the oxidation of the substance in the sample.

Method error in compliance with all recommendations does not exceed 3%.

Example. Determining the concentration of flotation reagents containing fatty acids, nairimer cry flotation phosphorus-containing ores; An alkaline solution of potassium ferro-ferricyanide КзРе {СЫ) b and (СМ) b is used as the solution of the SMA and they take 50 mm 0.01 n. CsRe (CN) b and 50 ml 0.001 n. K4Re (SM) b, cooked on 2 n. NaOH, and poured into the electrode cell. When the magnetic messenger was turned on in this solution, the initial oxidation potential 0 was measured (280-400 mV), then 5 ml of the test solution was added and after 5 min Et was measured (100-

30 mV)). The calculation of the reduction capacity is made according to the formula (2). Under industrial conditions, the determination of mol-set concentration can be carried out according to calibration graphs similar to those shown in FIG. 2, according to the jump in the potential of AF 1-EQ (35-100 mV). Using the proposed method allows to reduce the time for determination of coititration of flotation reagents containing

in particular, fatty acids, increase the accuracy of determination (the error of experience does not exceed 3%), reducing the analysis time, in addition, it can be used as a sensor of the automatic control system of flotation processes.

Claims (3)

Invention Formula The method of quantitative determination of the concentration of flotation reagents, including, in particular, fatty acids, by treating the test sample with an oxidizing agent while stirring for a fixed time, followed by determining the oxidant consumption, characterized in that, in order to simplify and create the conditions for continuous analysis, water a solution of a reversible redox system containing odio-time oxidized and reduced form, and an oxidizer consumption is determined by the difference in the values of the oxidized potential of this system to and after its addition to the sample. 2. A method according to claim 1, characterized in that a solution of potassium ferro-ferricyanide is used as a reversible redox system. 3. The method according to claim 1, characterized in that a ferro-ferritic system is used as a reversible redox system. Sources of information taken into account in the examination 1. The UK patent number 1373110, cl. G 01 N 27/00, publ. 1974. 2.B. K. Tyutyuniykov. Chemistry of fats, M., 1966, p. 540.