SU1143456A1 - Metal ion sorbent - Google Patents

Abstract

The use of ferromanganese nodules as a sorbent of metal ions.

Description

(L

with

00 4i

cl

The invention relates to the selective sorption of metals from the liquid phase and can be used to extract alkaline, alkaline earth, heavy and non-ferrous metals from solutions of complex composition and, in particular, to extract copper, nickel and cobalt from solutions obtained upon opening iron manganese nodules . The use of ferromanganese nodules is known as a raw material for non-ferrous metals, as well as iron and manganese 1. In this case, iron-manganese nodules are completely or partially decomposed by ammonia, combined or acidic methods. Closest to the invention of the technical essence and the achieved result is a sorbent based on magnesia-gelatinous slag, proposed for the extraction of Ni, Co and CU from solutions. This sorbent is characterized by a sufficiently high capacity for these metals, which is about 5-6 wt.%, And a sorption rate at which approximately 30% of the capacity is realized in 1 hour, and approximately 90% of the capacity in 7 hours. The disadvantages of the known sorbent are its unsatisfactory kinetic characteristics, the limited number of metals to be sorbed, the absence of high selectivity to the cations Cu, Ni, Co and the need for its artificial preparation using rather expensive sodium silicate. The purpose of the invention is to intensify the process of sorption,} a greater number of the sorbed metals and an increase in the selectivity of sorption of Cu, Ni, Co. through the use of a sorbent with better sorption properties and not requiring special preparation. The goal is achieved by using ferromanganese nodules as a sorbent of metal ions. For the sorption of metal ions from solutions, ferromanganese nodules were used, the chemical compositions of which are given in Table. Production of sorbents from ferromanganese nodules consists of technological operations: crushing ferromanganese nodules; settling into classes of the required size. .Example. The crushed ferromanganese concretions of fractions 1-3 mm are in contact with 1 M solutions of alkali, alkaline earth, heavy and non-ferrous metals at a ratio of T: W-1: 100 and vigorous stirring. The amount of sorbed metal depending on the time of sorption is presented in Table. 2 .. Example 2. The crushed ferromanganese nodules (samples 1 and 2) of the 0.06-0.1 mm fraction are contacted with the solution obtained by opening the ferromanganese nodules by the acid method for 15 minutes and the ratio T: Ж-1: 10, s the purpose of sorption of non-ferrous metals Cu, Ni, Co. The calculated distribution coefficients for Cu, Ni and Co are given in Table. 3. Example 3. The crushed ferromanganese nodules (sample 2) of the 0.06-0.1 mm fraction are contacted for 15 minutes with solutions of different composition, obtained by breaking the nodules by various methods in order to extract Cu, N1 and Co from them. The degree of extraction of non-ferrous metals, depending on the composition and pH of the solution, as well as the ratio of T: W, is given in Table. 4. Thus, as can be seen from the table. 2 approximately 50% of the capacity of the proposed sorbent is realized within 1 min, and 80-90% of the capacity within 1 h, whereas only about 30% of the known capacity is realized within 1 h, and 80-90% within 7 h, t . E. The use of ferromanganese nodules as a metal sorbent allows to intensify the sorption process at least 7 times. From tab. 2 it also follows that the proposed sorbent can be used to sorb a significantly larger number of metals than the known sorbent. In addition, as can be seen from the table. 3, the proposed sorbent has a pronounced selectivity for heavy and non-ferrous metals, therefore another advantage of the proposed sorbent is that it can be directly used for the extraction of Cu, Ni and Co from solutions obtained by covering the ferromanganese nodules with love (tab. 4) and therefore, it does not require hastily prepared rather expensive selective sorbents, but the same material is used as a sorbent, which leads to significant savings.

Table 1

27.8

296

72

16.4

Si 1.5; Ni 1.7;

Co 0.4; Mp 6.1; Fe 0.6.

Si 1.5; Ni 1.7;

Co 0.4; Mp 54.5; Fe 0.6

Sm 1.5; Nf 1.7; Co 0.4; Na 2,3;

K 3.9; Ca 2.0

Mp 2.7; Fe 0.4;

Si 1.5; Ni 1.7;

Co 0.4; Na 2.3;

K 3.9; Ca 2.0;

Mp2,7; Fe 0,4

Cu U; Ni 1.7;

Co 0.4; Na 6.9;

K 11.7; Ca 6.0;

Mp 8.1; Fe 0,4

Also

3.5

Table 3

4.4

4.6

27.4

290

2.5

14.6

2.4

68

. Table 4

1: 5

99.0

67.2

51.7

1: 5

94.1

55.5

21.6

, 81.3

1: 5

54.7

99.2

72.2

1:10

96,829,5

1: 5

.76,5

97.3

51.4

87.9

60.0

1:10

25.2

eleven

1143456

C 1.5; Ni 1.7; Co 04; NHjlOO

Also

Si 1.5; Ni 1.7;

Co 0.4; MH 100; 10.4

COj 25

Si 1.5; Ni 1.7;

Co 0.4; 4.0

(N4) 804,100

4.0

Also

eleven

12

Continued table. four

99.8

34.9

80.4

99.7

17.5

54.7

1:10

99.3

51,917,5

99.7

64.0

77.5

98.9

42.3

69.0

1:10