SU1175971A1 - Method of removing heavy metals impurities from mercury - Google Patents

Abstract

A method for purifying mercury from impurities of heavy metals, such as zinc, cadmium and copper, including the treatment of mercury with monovalent mercury compounds, characterized in that, in order to increase the degree of purification, increase the productivity of the process and ensure purification from bismuth, lead and tin, mercury passes through a layer of ion-exchange resin in the form of a monovalent mercury cation with a resin grain size of 0.020, 60 mm at a speed of 185-2700 kg of mercury / m -h. (L

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The invention relates to the metallurgy of non-ferrous metals and can be used to purify mercury from metals dissolved in it. The aim of the invention is to increase the degree of purification of mercury, increase the productivity of the process and provide purification from bismuth, lead and tin. The method is carried out as follows. To purify mercury from impurities of zinc, cadmium and copper, as well as lead, bismuth and tin, contaminated mercury is passed through a layer of ion exchange resin (such as KU-1, KU-2, KRS, KB-4, and similar foreign sulfonic cationites in the form of a monovalent cation mercury with a grain size of 0.02 0.60 mm and a speed of 185-2700 kg of mercury / m H, B as ion-exchange resins, resins of type KU-1 and KU-2 are used Example 1. Through a layer of ion-exchange resin (KU-1 or KU-2) volume 0, in the form of mercury (l), mercury is passed through, contaminated with zinc impurities, at a speed of 185 kg mercury / m this zinc is 0.5 g-eq / l, the volume of pure mercury obtained is 100 ml, the content of zinc impurities in pure mercury is not more than 5-10 i-eq / l In the method according to the prototype, the content of zinc impurities in pure mercury was 3-10 g-eq PRI mme R 2. The sequence of operations of the cleaning process is similar to example 1. Mercury transmission rate is 270 kg mercury / m-h. The original mercury contains cadmium impurities with a concentration of 0.5 g-eq / l. The amount of pure mercury produced is 100 ml. The content of cadmium in pure mercury is not more than 1 -10 g-eq / l. In the flow method, the cadmium content in Pts. Scaled mercury amounted to 610 g-eq. P r and M 3, The sequence of operations of the cleaning process is similar to Example 1, Mercury transmission rate of contamination is 540 kg p-tuti / m -h. The original mercury contains copper impurities with a concentration of 0.5 g-eq / l. The amount of pure mercury produced is 100 ml. The content of copper in the purified mercury is not more than 2-10 g-eq / l. In the method according to the prototype, the content of impurities is 712 copper of purified mercury with the carbon monoxide. About 8-10 g-eq / l. EXAMPLE 4 The sequence of operations of the purification process is similar to Example 1. The initial mercury contains impurities of zinc, cadmium, and copper with concentrations of 0.17-0.15 and 0.18 g-eq / l, respectively. The mercury transmission rate is 2700 kg of mercury / m H, the volume of pure mercury obtained is 100 ml. The content of impurities of zinc, cadmium and copper in purified mercury amounted to no more than 5 and 2-10 g-eq / l, respectively. In the method according to the prototype, the content of impurities-zinc, cadmium and copper in schenna mercury was 3-10: 6 and 8 10 g eq / l respectively. Example 5, The sequence of the cleaning process is similar to Example 1, Mercury transmission rate is 185 kg mercury / m -h. The initial mercury contains lead and bismuth impurities with concentrations of 0.5 and 0.5 g-eq / l, respectively. The amount of pure mercury produced is 50 ml. The content of lead and bismuth impurities in purified mercury was no more than 5-10 and 8-10 g-eq / l, respectively. EXAMPLE 6, The sequence of operations of the cleaning process is similar to the sequence presented in example 1, Mercury transmission rate 810 kg of mercury / m-h, Ishbdna mercury contains impurities tinov concentration 0.5. G-eq / l. The volume of pure mercury obtained is 100 ml, the content of tin impurities in purified mercury is not more than 8 10 g-eq / l. EXAMPLE 7 The sequence of cleaning operations is similar. Example 1, Mercury transmission rate is 2700 kg of mercury / m. Original mercury contains impurities of lead, bismuth and tin with concentrations of 0.33: 0.33 and 0, 34 g-eq / l, respectively. Increasing the rate of mercury transmission through the ion-exchange resin layer to values greater than 2,700 kg of mercury / m-h reduces the degree of purification of mercury. With a mercury transmission rate of less than 185 kg of mercury / m-h, the gap is characterized by low productivity. The dependence of the degree of purification on the mercury transmission rate is as follows. Content of mercury transmission through the metal mixtures elephant ion-exchange in purified mercury resin, kg mercury / mph, g-eq / l I1759 71 Content of the size of the grain of metals of the oyenexchangeable in purified mercury resin, mm ti g-eq / l

The dependence of the degree of purification on the grain size of the ion exchange resin is as follows:

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The use of ion exchange resin with a grain size of more than 0.6 mm leads to a decrease in the degree of purification of mercury.

Claims (1)

METHOD FOR CLEANING MERCURES FROM IMPURITIES OF HEAVY METALS, for example, zinc, cadmium and copper, including treating mercury with monovalent mercury compounds, characterized in that, in order to increase the degree of purification, increase the process efficiency and ensure purification from bismuth, lead and tin, mercury is passed through a layer of ion-exchange resin in the form of a monovalent mercury cation with a resin grain size of 0.020.60 mm at a speed of 185-2700 kg of mercury / m ^g · h