Platinum complexation at sorption of hexachloroplatinate(IV) ion with fibrous N,S-containing sorbents based on polyacrylonitrile (of TIOPAN Type)

Article abstract of DOI:10.1023/A:1013724311682

Sorption properties of fibrous nitrogen-containing sorbents based on polyacrylonitrile containing diethyldithiocarbamate (TIOPAN-2) and 8-mercaptoquinoline groups (TIOPAN-6) with respect to the platinum(IV) chloride complex were studied. The effects of th

Full text of DOI:10.1023/A:1013724311682

Russian Journal of Applied Chemistry, Vol. 74, No. 9, 2001, pp. 1439 1445. Translated from Zhurnal Prikladnoi Khimii, Vol. 74, No. 9,
001, pp. 1401 1406.
Original Russian Text Copyright
2
2001 by Simanova, Kuznetsova, Demidov, Knyaz’kov, Konovalov.
SORPTION
AND ION-EXCHANGE PROCESSES
Platinum Complexation at Sorption of Hexachloroplatinate(IV)
Ion with Fibrous N,S-Containing Sorbents Based
on Polyacrylonitrile (of TIOPAN Type)
S. A. Simanova, T. V. Kuznetsova, V. N. Demidov,
O. V. Knyaz’kov, and L. V. Konovalov
St. Peterburg State Technological Institute, St. Petersburg, Russia
Received January 16, 2001; in final form, June 18, 2001
Abstract Sorption properties of fibrous nitrogen-containing sorbents based on polyacrylonitrile containing
diethyldithiocarbamate (TIOPAN-2) and 8-mercaptoquinoline groups (TIOPAN-6) with respect to the plati-
num(IV) chloride complex were studied. The effects of the temperature, platinum concentration, and acidity
on the metal recovery were determined. The kinetics of sorption and sorption capacity of sorbents in hydro-
chloric acid and chloride solutions were established. The most probable mechanism of sorption and the
composition of compounds formed in the fiber phase were proposed.
Sorbents with N,S-containing functional groups are
promising materials for recovery of platinum metals
from solutions [1 4]. The mechanism of sorption is of
special interest. It was discussed in [5 16]. A review
on sorption recovery of platinum with N,S-containing
materials was made in [5].
[13] proposed a chelating ion exchanger containing
groups of the CH CH SH CH N(C H ) type,
2
2
2
2 5 2
which was prepared by treating polyoxyethylene with
diethylaminomethylthiirane. The composition of the
sorbed complexes was not determined. Chelating
resins containing dithiocarbamate groups quantitative-
ly and very selectively recover precious metals, in-
cluding Pt(IV), from solutions. The platinum species
were not studied [14].
Materials containing thioamide groups are widely
used for recovery of platinum metals [6 12]. MTI-
LON-T fiber, which is a copolymer of polyacryloni-
trile (PAN) and cellulose treated with hydrogen sul-
fide, recovers 0.5 mmol g 1 of K PtCl from 1 M HCl
Fibrous sorbent TIOPAN-13 based on PAN with
mercaptobenzothiazole functional groups very rapidly
recovers Pt(IV) complexes from solutions at pH 0.5
2
6
at 100 C. In the presence of Fe(III) and Cu(II) salts,
sorption decreases by 50 70% [6]. The mechanism
of platinum recovery with MTILON-T fiber was not
considered.
2
.0. Large amounts of heavy metals do not interfere
with the recovery [15]. The mechanism of the sorption
recovery was not studied.
The modified copolymer of polyvinyl alcohol with
PAN (MSPVS fiber) containing thioamide groups
quantitatively and selectively recovers platinum(II)
and (IV) chloro complexes from HCl and NaCl solu-
tions of various concentrations [7 12]. In 2 M HCl,
the sorption capacity of the MSPVS fiber with respect
to K PtCl is 0.48 and 1.50, and with respect to
Monivex and Srafion resins, which are styrene
divinylbenzene copolymers containing isothiourea,
can recover platinum group metals, including plati-
num [16]. The chelating resin based on macronetwork
styrene divinylbenzene copolymer with thiosemicar-
bazide as a functional group quantitatively recovers
platinum group metals, including Pt(IV), from hy-
drochloric acid solutions. The maximal sorption ca-
2
4
1
K PtCl , 0.16 and 0.42 mmol g at 20 and 98 C, re-
2
6
spectively. It was found that the sorption in both cases
1
paccity with respect to Pt(IV) (0.71 mmol g ) is ob-
2+
proceeds with formation of a [Pt {R-C(NH )S}Cl ]
2
3
served in 1 M HCl, in which platinum group metals
form stable complexes. It was found that the metal
thiosemicarbazide ratio in the complex formed in
the sorbent phase is close to 1 : 1 [17].
type complex, in which thioamide groups are coor-
dinated via sulfur atoms, with the successive hy-
drolytic conversion of thioamide complexes into sul-
fides strongly retained in the fiber matrix [7]. To re-
cover Pt(IV) complexes, Ni Cai-Hia and Xu Yu-Wu
Earlier we studied the sorption properties of
1
070-4272/01/7409-1439$25.00 2001 MAIK Nauka/Interperiodica

1440
SIMANOVA et al.
Table 1. Conditions of preparation of TIOPAN-type fibers and their properties [20]
Sorbent
Modifying reagent, wt %
Thiosemicarbazide, 2
Sodium diethyldithiocarbamate, 8
Thioacetamide, 8
Thiourea, 8
Ammonium thiocyanate, 4
Sodium 8-mercaptoquinolinate, 3
, min, at 100 C
CS, %
SSCAg, mmol g 1
TIOPAN-1
TIOPAN-2
TIOPAN-3
TIOPAN-4
TIOPAN-5
TIOPAN-6
15
30
60
40
60
20
10.0
14.3
15.5
8.7
7.8
4.0
2.04
1.48
2.59
1.48
1.48
1.11
GLIPAN-1 fiber (which is a fibrous sorbent based on
PAN modified with thiosemicarbazide) with respect to
Pt(IV) chloride complexes and showed that this fiber
quantitatively recovers K PtCl from HCl and NaCl
TIOPAN-6 at 98 C (Table 2). We concluded that in
all cases the Pt(II) sorption is caused by complexation
with the sorbents as polymeric ligands. In the fiber
phase, TIOPAN-2 forms complexes [Pt(SR )Cl ],
2
6
2
2
solutions (CPt = 1 10 mM) with similar rates [18].
TIOPAN-5 gives [Pt(SHR) Cl ] in which polymeric
2 2
1
ligands coordinate via sulfur atoms, and TIOPAN-6
forms cis-[Pt(SQuinR) Cl ] in which 8-mercapto-
The maximal sorption capacity (1.35 mmol g ) is
observed in 0.5 M HCl. Sorption of Pt(IV) chloride
complexes with GLIPAN-1 in all cases is caused by
metal complexation with sorbent as a polymeric
ligand and metal reduction in the fiber phase. The
2
2
quinoline group is a monodentate ligand bonded to
Pt(II) via nitrogen atom [19].
In this work, we studied the sorption properties of
TIOPAN-type N,S-containing fibers with respect to
Pt(IV) chloride complexes and the composition of the
species formed in the sorbent phase.
complex [R NH C(NH NH )=SPt(II)Cl ], in which
2
2
the thiosemicarbazide group is a bidentate ligand, is
the final sorbed species of platinum [18].
For recovery of platinum(II) chloride complexes,
we proposed fibrous nitrogen-containing sorbents of
the TIOPAN type (copolymers of PAN with grafted
polyglycidyl methacrylate PAN PGMA) modified
with various N,S-containing reagents (Table 1) [19
EXPERIMENTAL
Sorption was studied under static conditions at the
continuous agitation and at 18 and 98 C. The starting
Pt(IV) compound, K PtCl , was synthesized by the
22]. High Pt(II) sorption is observed with TIOPAN-6
2
6
at room temperature and with TIOPAN-2, TIOPAN-5,
and TIOPAN-6 at elevated temperatures. The static
sorption capacity (SSC) of these fibers in 1 M HCl
decreases in the order TIOPAN-6 > TIOPAN-5 >
TIOPAN-2 at 20 C and TIOPAN-2 > TIOPAN-5 >
method described in [23]. Sorption was performed
from freshly prepared 1 20 mM solutions of K PtCl6
2
in 0.1 4.0 M HCl or 0.1 2 M NaCl. In all cases, the
volume of solutions taken was 20 ml, and the sorbent
sample was 0.1 g. The platinum content in solutions
was determined spectrophotometrically with tin(II)
chloride [24]. The amount of the metal sorbed was
calculated as the difference between its content in the
solution before and after sorption. The IR spectra of
fibers within the 400 4000 cm 1 range were meas-
ured on an IKS-29 spectrophotometer, and within the
140 400 cm 1 range, on a Hitachi FIS-3 spectro-
photometer. Samples were prepared as in [5]. X-ray
photoelectron spectra (XPES) were recorded on a
Perkin Elmer PH 15400 spectrometer with excitation
by Mg X-ray radiation. Spectra were treated (quan-
titative analysis and line separation) using standard
programs. The spectra were standardized against C1s
electron binding energy of 285.0 eV. The binding
energy was determined with an error of 0.2 eV. Ther-
mograms of sorbents were recorded on an MOM
Table 2. Recovery of platinum from 1 M HCl with
TIOPAN-type sorbents
Recovery, %
Pt(II) at indicated
Sorbent
Pt(IV) at
temperature, C [19]
9
8 C
20
98
TIOPAN-1
TIOPAN-2
TIOPAN-3
TIOPAN-4
TIOPAN-5
TIOPAN-6
1
82
0
19
2
29
15
3
9
43
100
47
100
8
25
82
96
97
(Hungary) derivatograph within the 20 800 C range
RUSSIAN JOURNAL OF APPLIED CHEMISTRY Vol. 74 No. 9 2001

PLATINUM COMPLEXATION AT SORPTION OF HEXACHLOROPLATINATE(IV)
1
1441
at a heating rate of 10 deg min . Isothermal heat-
ing of sorbents was performed on a special device
equipped with a system for a qualitative analysis of
the liberated gaseous products. Thermal conversion of
samples (temperature of the decomposition onset) was
visually controlled on a Koeffler stage.
(a)
Initially, the sorption power of TIOPAN fibers
with respect to Pt(IV) at sorption from solutions of
K PtCl in 1 M HCl was studied at 98 C (Table 2).
2
6
The sorption duration was 1 h, the platinum concen-
tration in the initial solution was 1 mM. As seen,
Pt(IV) is efficiently recovered with TIOPAN-2 and
TIOPAN-6, and Pt(II), also with TIOPAN-5. There
is no correlation between the sulfur content in the
fiber and the recovery of both Pt(II) and Pt(IV)
(b)
(Tables 1, 2). TIOPAN-1, TIOPAN-3, TIOPAN-4, and
TIOPAN-5 fibers recover Pt(IV) poorly.
TIOPAN-2 and TIOPAN-6 fibers containing di-
ethyldithiocarbamate and 8-mercaptoquinoline groups,
respectively, were studied in detail. It was found that
the time of attaining the apparent equilibrium
in
ap
(c)
distribution of Pt(IV) between the fiber and 1 M HCl
solution is 2 h at 18 C and 1 h at 98 C for TIOPAN-6
and 2 h at 98 C for TIOPAN-2. The half-sorption
time
8 C, respectively. The low rate of Pt(IV) sorption
for TIOPAN-6 is 2 and 4 min at 98 and
1/2
1
with TIOPAN-2 should be noted:
at 98 C (Fig. 1a, Table 3).
is 25 min even
1/2
For sorption from 0.5 M NaCl, the apparent equi-
librium of Pt(IV) between the solution and sorbent
in all cases is attained in 2 h, and
both at 98
1/2
, min
and 18 C is 4 min for TIOPAN-6 and 23 min for
TIOPAN-2 (Fig. 1a, Table 3). At room temperature,
TIOPAN-2 recovers Pt(IV) chloride complexes neither
from HCl nor from NaCl solutions.
Fig. 1. Dependences of (a) F, (b) B , and (c) ln(1 F) on
the time of sorption of K PtCl from 1 M HCl with (1, 2)
2
6
TIOPAN-6 and (3) TIOPAN-2 and from 0.5 M NaCl with
(4, 5) TIOPAN-6 and (6) TIOPAN-2. (F) Exchange degree;
F = Q /Q , where Q is Pt sorption in time and Q is
equilibrium sorption; (B ) kinetic coefficient of sorption,
The type of the diffusion kinetics of sorption is
commonly determined using the known dependence of
the exchange degree F (F = Q /Q , where Q is sorp-
tion in time and Q is the equilibrium sorption)
on sorption time [25] and the dependence on sorp-
tion time of B and ln(1 F), where B is the kinetic
2
B = (F/1.08) . Temperature, C: (1) 3, (6) 98, and (4, 5) 18.
covery decreases with increasing concentration of
hydrochloric acid: platinum is practically completely
recovered from 0.1 0.5 M HCl and to only 75
80% from 4 M HCl. The effect of HCl concentration
on platinum(IV) sorption with TIOPAN-2 is even
stronger. At 98 C, platinum recovery decreases from
100 to 45% in going from 0.1 to 4 M HCl.
2
coefficient of sorption [B = (F/1.08) ] [26]. The
analysis of the kinetic curves of sorption (Fig. 1)
shows mixed diffusion character of the kinetics of
Pt(IV) sorption with TIOPAN-6 fiber from acid solu-
tions. The linear sections of ln(1 F) curves in-
dicate that the film diffusion is the major factor af-
fecting the kinetics of Pt(IV) sorption with TIOPAN-2
fiber [26] (Fig. 1c).
The dependence of SSE with respect to Pt(IV) on
equilibrium metal concentration is shown in Fig. 2.
Sharp slope of the isotherms of the Pt(IV) sorption
from HCl solutions allows TIOPAN-2 and TIOPAN-6
to be recommended for quantitative recovery of plati-
num from both dilute and concentrated solutions, the
It was found that at platinum sorption with TIO-
PAN-6 at 18 and 98 C (CPt = 1 mM) the Pt(IV) re-
RUSSIAN JOURNAL OF APPLIED CHEMISTRY Vol. 74 No. 9 2001

1442
SIMANOVA et al.
Table 3. Recovery of platinum(IV) chloride complexes with TIOPAN-2 and TIOPAN-6 fibers
1
/2
app
Pt(IV) recovery,
%
T, C
Medium, M
SSC, mmol g 1
min
TIOPAN-2
9
9
8
8
HCl, 1
NaCl, 0.5
0.75
0.54
25
23
120
120
82
79
TIOPAN-6
18
18
98
98
HCl, 1
NaCl, 0.5
HCl, 1
0.57
0.16
0.80
0.53
4
4
2
4
120
120
60
91
21
97
35
NaCl, 0.05
120
former sorbent at heating and the latter, both at room
temperature and heating. The data on SSC of fibers
are listed in Table 3. The platinum(IV) recovery from
NaCl solutions is weaker (Table 3, Fig. 2).
desorbed with 6 M HCl and 22 and 26% of Pt is
desorbed with thiourea solution in 10% HCl from
TIOPAN-2 and TIOPAN-6, respectively.
The comparison of the kinetic and capacity charac-
teristics of the fibers shows that in all cases plati-
num(II) is recovered faster and with greater SSC as
Sorption of Pt(IV) with TIOPAN-2 and TIOPAN-6
is practically irreversible: only 0.6 and 1.0% of Pt is
compared to Pt(IV). This may be due to two factors:
SC, mmol g 1
(a)
2
(
1) greater charge density on PtCl4 as compared to
2
PtCl , which increases electrostatic attraction of
6
the complex anion to the protonated nitrogen atom of
the fiber, and (2) greater steric hindrance in interaction
2
of the octahedral PtCl6 complex as compared to the
square-planar PtCl2 ion.
4
It should be noted that TIOPAN-5 containing thiol
groups practically completely recovers K PtCl [19]
2
4
but sorbs K PtCl poorly (Table 2).
2
6
The analysis of the kinetics and capacity param-
eters of TIOPAN-2 with respect to K PtCl suggests
2
6
CPt, eq, mM
that the platinum recovery from both hydrochloric
acid and NaCl solutions proceeds with formation of
a Pt(II) compound of the [Pt(SR) Cl ] type in the
SC, mmol g 1
(b)
2
2
sorbent phase. The diethyldithiocarbamate group of
the polymeric ligand coordinates to Pt(II) via sulfur
atom as a monodentate ligand. The low rate of sorp-
tion, sharp temperature dependence of sorption, and
comparison of the IR and far-IR spectra of fibers after
sorption of K PtCl (Figs. 3, 4) and K PtCl [19] in-
2
6
2
4
dicate complex formation. In both cases the spectra
are similar. A strong change of the IR spectrum in the
1
(
CS) and (CN) range (1200 1600 cm ) (Fig. 3)
CPt, eq, mM
shows formation of a covalent bond of platinum with
the fiber. XPES indicates reduction of Pt(IV) to Pt(II)
Fig. 2. Isotherms of K PtCl sorption from (a) 1 M HCl
2
6
during K PtCl sorption. The binding energy of the
and (b) 0.5 M NaCl at (1, 2) 98 and (3) 18 C. (SC) Sorption
capacity; (C equilibrium concentration. Sorbent:
1) TIOPAN-2 and (2, 3) TIOPAN-6.
2
6
)
Pt4f7/2 electron is 72.7 eV, which agrees with refer-
Pt, eq
(
ence data for Pt(II) [27].
RUSSIAN JOURNAL OF APPLIED CHEMISTRY Vol. 74 No. 9 2001

PLATINUM COMPLEXATION AT SORPTION OF HEXACHLOROPLATINATE(IV)
1443
For comparison, we performed a reaction of
K PtCl with the monomeric ligand, sodium diethyl-
2
4
dithiocarbamate. To a hot solution of K PtCl , a hot
2
4
solution of sodium diethyldithiocarbamate was added
gradually with stirring. The resulting pale yellow pre-
cipitate was filtered off and washed with ether. As
shown by elemental analysis and far-IR and IR spec-
tra, the compound corresponds to the previously de-
scribed complex [PtS N(C H ) ] [28] in which di-
2
2 5 2
ethyldithiocarbamate ion coordinates to platinum atom
via sulfur atom. In the IR spectra of this compound
and of TIOPAN-2 fiber after K PtCl sorption the
2
6
same bands assigned to stretching vibrations of the
coordinated diethyldithiocarbamate group are ob-
served in the 1200 1600 cm 1 range (Fig. 3). How-
ever, their far-IR spectra differ substantially: the spec-
trum of the fiber after sorption of K PtCl from 1 M
2
6
1
HCl contains two bands at 310 and 328 cm assigned
to the stretching vibrations (Pt Cl) of asymmetrical
cis-[Pt(SR) Cl ]. TIOPAN-2 fiber after sorption of
2
2
K PtCl from 0.5 M NaCl has the similar spectrum.
2
6
cm 1
,
In the far-IR spectrum of the chelate with the mono-
meric ligand such bands are absent [28]. The differ-
ence in reaction of K PtCl with the monomeric lig-
Fig. 3. IR spectra of (1) [Pt(S N(C H ) ], (2) TIOPAN-2
2
2 5 2
fiber after K PtCl sorption from 1 M HCl, and (3) sodium
2
6
2
6
diethyldithiocarbamate. (A) Absorption and ( ) wave
and and the fibrous sorbent, both containing diethyl-
number; the same for Fig. 4.
dithiocarbamate group, may be due to two factors:
(
(
1) one of two sulfur atoms of the polymeric ligand
TIOPAN-2) is bound with the fiber matrix PAN
PGMA and cannot participate in formation of the
chelate bond with platinum and (2) steric hindrances
arise in interaction of the platinum atom with
the bulky diethyldithiocarbamate group bonded with
the polymeric matrix of the fiber.
The high rate of recovery of the platinum(IV)
chloride complexes with TIOPAN-6 fiber from both
acid and neutral media and weak dependence on tem-
perature suggest that in the first stage of sorption the
initial complex reacts with protonated fiber
, cm 1
Fig. 4. Far-IR spectra of fibers after K PtCl sorp-
2
6
tion. Sorption temperature 98 C, C = 8 mM. Sorption
Pt
from (1 3) 1 M HCl and (4) 0.5 M NaCl. (2) Fiber
heated at 180 C for 0.5 h. Sorbent: (1) TIOPAN-2 and
2
RQuinS HCl + K PtCl
(RQuinSH) PtCl + 2KCl,
2 6
2
6
(
2 4) TIOPAN-6.
2
RQuinS H O + K PtCl
(RQuinSH) PtCl + 2KOH.
2 6
2
2
6
rangement with formation of cis-(RQuinSH) PtCl4
2
The next stage is the partial reduction of the onium
platinum(IV) complex to the analogous platinum(II)
complex [(RQuinSH) PtCl ] with 8-mercaptoquino-
coordinated via the nitrogen atom:
(RQuinSH) PtCl4
cis-[Pt(RQuinS) Cl ] + 2HCl.
2 2
2
4
2
line groups that do not participate in sorption. The
XPES data indicate the prevalence of platinum(II)
complexes on the fiber. The binding energy of the
Heating promotes such transformation. To simulate
this reaction, we estimated the rearrangement tem-
Pt4f7/2 electron of 73.1 eV is in a good agreement perature from the termogravimetric data for the
with the reference data for Pt4f7/2, e.g., in K PtCl4
fiber. In the far-IR spectrum of TIOPAN-6 fiber after
sorption of K PtCl from 1 M HCl, subjected to iso-
thermal heating at 180 C for 0.5 h, two bands are
2
[
27]. We can assume that sorption from NaCl solu-
2
4
tions involves in the second stage the Anderson rear-
RUSSIAN JOURNAL OF APPLIED CHEMISTRY Vol. 74 No. 9 2001

1444
SIMANOVA et al.
1
observed at 305 and 329 cm , belonging to Pt Cl
stretching vibrations of the asymmetrical cis-dichloro-
diammine complex. Formation of H bonds between
protonated nitrogen of the fiber mercaptoquinoline
groups and chloride ions in the inner coordination
sphere of the metal complex facilitates such trans-
formation.
4. Myasoedova, G.V. and Komozin, P.N., Zh. Neorg.
Khim., 1994, vol. 39, no. 2, pp. 280 288.
5
. Simanova, S.A., Kuznetsova, T.V., Belyaev, A.N.,
et al., Zh. Prikl. Khim., 1999, vol. 72, no. 8, pp. 1276
1281.
6
. Orobinskaya, V.A., Chuikova, N.E., Nazarenko, G.N.,
et al., in Analiz i tekhnologiya blagorodnykh metallov
(
Analysis and Technology of Precious Metals), Mos-
It is known that in reactions of platinum complexes
with 8-mercaptoquinoline and its derivatives yield
the Pt(II) chelates [29]. For instance, reaction of
cow: Metallurgiya, 1971, pp. 91 95.
7
. Simanova, S.A., Bobritskaya, L.S., Kukushkin, Yu.N.,
et al., Zh. Prikl. Khim., 1981, vol. 54, no. 4, pp. 764
7
8
-mercaptoquinoline with both K PtCl and K PtCl
2 4 2 6
71.
produces the compound [Pt(SNC H ) ] in which
9
6 2
the organic ligand coordinates to platinum via N and
S atoms [29]. Since, when PAN PGMA is modified
with sodium 8-mercaptoquinolinate [20], the modify-
ing agent is incorporated into the fiber matrix via the
sulfur atom. The platinum atom is probably bound
with the fiber via the nitrogen atom.
8. Simanova, S.A., Bobritskaya, L.S., Kukushkin, Yu.N.,
et al., Information Bulletin of NTIP Interbranch Re-
gional Center, 1979, no. 1393-79.
9. Simanova, S.A., Bobritskaya, L.S., Kukushkin, Yu.N.,
et al., Zh. Prikl. Khim., 1981, vol. 54, no. 3, pp. 514
5
17.
1
1
1
0. Simanova, S.A., Bobritskaya, L.S., Kukushkin, Yu.N.,
et al., Zh. Prikl. Khim., 1986, vol. 59, no. 1, pp. 175
CONCLUSIONS
1
78.
1. Simanova, S.A., Kukushkin, Yu.N., Kolontarov, I.Ya.,
(
1) Sorbents TIOPAN-2 and TIOPAN-6 (copoly-
et al., Zh. Prikl. Khim., 1977, vol. 50, no. 31, pp. 519
mers of polyacrylonitrile with grafted polyglycidyl
methacrylate modified with sodium diethyldithiocar-
bamate and 8-mercaptoquinoline, respectively) can
quantitatively recover platinum(IV) chloride com-
plexes from acid and neutral solutions. TIOPAN-6
with high rate and quantitatively recovers Pt(IV) at 18
and 98 C, while TIOPAN-2 efficiently sorbs Pt(IV)
only at heating.
5
22.
2. Simanova, S.A., Bobritskaya, L.S., Kalyamin, A.V.,
and Kukushkin, Yu.N., Zh. Prikl. Khim., 1984, vol. 57,
no. 11, pp. 2470 2476.
1
1
1
1
1
1
3. Ni Cai-Hia and Xu Yu-Wu, Chem. J. Chin. Univ.,
1
995, vol. 16, no. 4, pp. 657 659.
4. Dong Shihua and Tang Wanxiong, Acta Polym. Sin.,
990, no. 1, pp. 28 34.
1
(
2) In all cases, Pt(IV) sorption is caused by com-
5. Tat’yankina, E.M., Zh. Anal. Khim., 1996, vol. 51,
plexation with sorbents as polymeric ligands. The
platinum(IV) chloride complex reacts with TIOPAN-2
fiber with formation of the [Pt(SR) Cl ]-type com-
pound, in which the polymeric ligand coordinates via
sulfur atom. At Pt(IV) sorption with TIOPAN-6,
no. 5, pp. 498 501.
6. Warshawsky, A., Fieberg, M.B., and Mihalik, P.,
2
2
Separ. Purif. Meth., 1980, vol. 9, no. 2, pp. 209 265.
7. Siddihanta, S. and Dos, H.R., Talanta, 1985, vol. 32,
no. 6, pp. 457 460.
the onium compound (RQuinSH) PtCl4 is formed.
2
8. Simanova, S.A., Knyaz’kov, O.V., Belyaev, A.N.,
et al., Zh. Prikl. Khim., 1998, vol. 71, no. 2, pp. 220
226.
At heating, this compound converts into cis-[Pt
(
RQuinS) Cl ] in which 8-mercaptoquinoline group
coordinates via nitrogen atom.
2 2
1
2
2
2
9. Simanova, S.A., Zamorova, I.N., Kazakevich, Yu.E.,
et al., Zh. Prikl. Khim., 1992, vol. 65, no. 9, pp. 1987
1994.
REFERENCES
0. Simanova, S.A., Kazakevich, Yu.E., Danilova, E.Ya.,
et al., Zh. Prikl. Khim., 1992, vol. 65, no. 3, pp. 686
691.
1
2
3
. Simanova, S.A. and Kukushkin, Yu.N., Izv. Vyssh.
Uchebn. Zaved., Khim. Khim. Tekhnol., 1985, vol. 28,
no. 8, pp. 3 15.
1. Simanova, S.A., Zamorova, I.N., Kazakevich, Yu.E.,
et al., Zh. Prikl. Khim., 1992, vol. 65, no. 7, pp. 1619
1630.
. Simanova, S.A. and Kukushkin, Yu.N., Izv. Vyssh.
Uchebn. Zaved., Khim. Khim. Tekhnol., 1986, vol. 29,
no. 5, pp. 3 14.
2. Simanova, S.A., Zamorova, I.N., Kazakevich, Yu.E.,
et al., Zh. Prikl. Khim., 1992, vol. 65, no. 10,
pp. 2274 2281.
. Simanova, S.A. and Kukushkin, Yu.N., Probl. Sovr.
Khim. Koord. Soedin., 1992, no. 10, pp. 125 141.
RUSSIAN JOURNAL OF APPLIED CHEMISTRY Vol. 74 No. 9 2001

PLATINUM COMPLEXATION AT SORPTION OF HEXACHLOROPLATINATE(IV)
1445
2
2
2
2
3. Sintez kompleksnykh soedinenii metallov platinovoi
gruppy: Spravochnik (Synthesis of Platinum Group
Metal Complexes: Handbook), Chernyaev, I.I., Ed.,
Moscow: Nauka, 1964.
4. Ginzburg, S.I., Ezerskaya, N.A., Prokof’eva, I.V.,
et al., Analiticheskaya khimiya elementov: Platinovye
metally (Analytical Chemistry of Elements: Platinum
Metals), Moscow: Nauka, 1972.
pleksoobrazuyushchie ionity (Complexing Ion Ex-
changers), Moscow: Khimiya, 1980.
2
7. Nefedov, V.I., Rentgenoelektronnaya spektroskopiya
khimicheskikh soedinenii: Spravochnik (X-ray Photo-
electron Spectroscopy of Chemical Compounds:
Handbook), Moscow: Khimiya, 1984.
2
8. Baker, A.T. and Emett, M.T., Aust. J. Chem., 1992,
vol. 45, pp. 429 434.
5. Polyanskii, N.G., Gorbunov, G.V., and Polyan-
skaya, N.L., Metody issledovaniya ionitov (Methods
of Studying Ion Exchangers), Moscow: Khimiya,
29. Bankovskii, Yu.A., Khimiya vnutrikompleksnykh
soedinenii merkaptokhinolina i ego proizvodnykh
(Chemistry of Chelate Compounds of Mercaptoquino-
line and Its Derivatives), Riga: Zinatne, 1978.
1
976.
6. Saldadze, K.M. and Kopylova-Valova, V.D., Kom-
RUSSIAN JOURNAL OF APPLIED CHEMISTRY Vol. 74 No. 9 2001