scholarly journals Variations of Lattice Constants and Refractive Indices in the System, Barium Sulfate-Lead Sulfate

1969 ◽  
Vol 9 (4) ◽  
pp. 266-272 ◽  
Author(s):  
Yoshinori Sugitani ◽  
Nobuaki Hanasawa ◽  
Kazuo Harada ◽  
Kozo Nagashima
Keyword(s):  
Barium Sulfate ◽  
Lead Sulfate ◽  
Refractive Indices ◽  
Lattice Constants ◽  
Sulfate Lead

Investigation of Flotation Separation of Elemental Sulfur and Sulfides from Lead Sulfate from Low-Temperature Leaching of Lead Concentrates

2020 ◽  
Vol 989 ◽  
pp. 537-542
Author(s):  
Kirill A. Karimov ◽  
Aleksei V. Kritskii ◽  
Sergey E. Polygalov
Keyword(s):  
Low Temperature ◽  
Filter Cake ◽  
Elemental Sulfur ◽  
Lead Sulfate ◽  
Raw Material ◽  
Granulation Process ◽  
Flotation Concentrate ◽  
Autoclave Leaching ◽  
Sulfate Lead ◽  
Concentrate Yield

Monometallic ore that is mostly lead found in nature is extremely rare. The main natural raw material for the lead production is sulfide polymetallic ores. In this study the filter cake processing after the low-temperature autoclave leaching of the lead concentrate to produce a sulphide concentrate and lead tailings was investigated The study of component separation was carried out using the methods of mathematical planning of the second order experiment. The following optimal costs of reagents, g/t: 140-200 potassium xanthate, 70-100 foaming agent, 100 copper sulfate; the concentrate yield is 41-43 %; it is extracted to, %: 95 Fe, 49 Cu, 96 Zn, 98 S0, 18-19 Pb. At flotation 18,7% of lead goes into flotation concentrate and 80.5% is lead sulfate. The rectification of the obtained concentrate by flotation did not give acceptable results, since the yield of the foam product in all experiments was 93-96%. For the separation of lead sulphate from sulphur-sulfide concentrate was used in the granulation of sulfur in the following conditions: t = 145 °C, Po2 = 0,0-0,5 MPa, τ = 60 to 120 min. In the granulation process of the flotation concentrate is a division of lead sulfate and elemental sulfur, the sulfate lead content in sulphur-sulfide phase is decreased from 28.44 % to 3.5 %, its recovery in a sulfate filter cake has reached 90.6 %

Absorptiometric Microdetermination of Total Sulfur in Rubber Products

1956 ◽  
Vol 29 (2) ◽  
pp. 620-634 ◽  
Author(s):  
K. E. Kress
Keyword(s):  
Barium Sulfate ◽  
Lead Nitrate ◽  
Gravimetric Method ◽  
High Sensitivity ◽  
Lead Sulfate ◽  
Chloride Complex ◽  
Lead Chloride ◽  
Excess Lead ◽  
Precision And Accuracy ◽  
Low Sulfur

Abstract The 1.0 to 2.5 per cent of sulfur normally present in rubber products is oxidized with concentrated nitric acid-bromine reagent, followed by perchloric acid in the presence of excess lead nitrate. Sulfur as lead sulfate is precipitated and washed with acetone. The lead sulfate is dissolved in 50 per cent hydrochloric acid, and absorbance of the lead chloride complex is recorded at 270 mµ. Sulfur is calculated on the basis of the measured lead content of the precipitate. The high sensitivity puts the method in the micro-range. An experienced analyst can analyze 40 to 50 samples a day. Precision and accuracy are comparable to those of the conventional barium sulfate gravimetric method at the low sulfur concentrations normally found in rubber products.

Preparation of high-purity lead oxide from spent lead paste by low temperature burning and hydrometallurgical processing with ammonium acetate solution

RSC Advances ◽  
2016 ◽  
Vol 6 (25) ◽  
pp. 21148-21155 ◽  
Author(s):  
Cheng Ma ◽  
Yuehong Shu ◽  
Hongyu Chen
Keyword(s):  
Low Temperature ◽  
Lead Oxide ◽  
Ammonium Acetate ◽  
Lead Dioxide ◽  
Lead Sulfate ◽  
Acetate Solution ◽  
Lead Acid Battery ◽  
Hydrometallurgical Processing ◽  
Sulfate Lead ◽  
Main Components

Lead sulfate, lead dioxide and lead oxide are the main components of lead paste in a spent lead-acid battery.

Synthesis, structure, optical and electrochemical properties of the lead sulfate-lead dioxide-lead glasses and vitroceramics

2015 ◽  
Vol 274 ◽  
pp. 111-118 ◽  
Author(s):  
S. Rada ◽  
L. Rus ◽  
M. Rada ◽  
E. Culea ◽  
N. Aldea ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Lead Dioxide ◽  
Lead Sulfate ◽  
Sulfate Lead

Coprecipitation of barium sulfate and barium carbonate at 80°C

1987 ◽  
Vol 45 ◽  
pp. 352-353
Author(s):  
K. Takiyama
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Barium Sulfate ◽  
Room Temperature ◽  
Barium Carbonate ◽  
Morphological Properties ◽  
X Ray Diffraction ◽  
Orthorhombic System ◽  
X Ray ◽  
Lattice Constants

The coprecipitation of two sparingly soluble compounds in the aqueous solution has been studied by means of electron microscopy and x-ray diffraction techniques, and the properties of the particles produced by the coprecipitation were discussed as an issue in crystal chemistry. In the present investigation the coprecipitation of barium sulfate and barium carbonate was studied. Both crystals belong to the orthorhombic system. The lattice constants of barium sulfate are ao=8.878, bo=5.450 and co=7.152 Å. Those of barium carbonate are ao=5.314, bo=8.902 and co=6.430 Å. The ratio of the lattice constants of barium sulfate is different from that of barium carbonate. In this investigation, the relation of the morphological properties of the particles with the crystallographic properties of the component compounds was discussed. As the particles became very small when the precipitation was carried out at room temperature, in the present investigation the coprecipitation was done at 80°C to produce larger particles to study the morphological properties of the particles.

A solid solution series between xenotime (YtPO4) and chernovite (YtAsO4)

1973 ◽  
Vol 39 (302) ◽  
pp. 145-151 ◽  
Author(s):  
Stefan Graeser ◽  
Hans Schwander ◽  
Hans A. Stalder
Keyword(s):  
Solid Solution ◽  
Single Crystal ◽  
Partial Solution ◽  
Refractive Indices ◽  
New Mineral ◽  
Solid Solution Series ◽  
The Urals ◽  
Lattice Constants ◽  
Greenish Yellow ◽  
Single Crystal Study

SummaryThe mineral chernovite, described as a new mineral from the Urals by Russian mineralogists in 1967 (Goldin et al, 1967), has been found at three different localities in mineral fissures in the Binnatal, Switzerland, and a little to the south, in Italy. The mineral occurs in greenish-yellow bipyramidal crystals up to about I mm. A detailed single-crystal study of several specimens showed that the lattice constants vary considerably on either side of those published for the original chernovite. The refractive indices, too, display some variation. Microprobe analyses of this material, and of xenotime specimens from the same region, revealed that there exists at least partial solution between chernovite and xenotime. The three chernovite samples have molar percentages of 63·2, 73·2, and 82·0 % YtAsO4 (the Urals chernovite has about 95·2 %). These studies prove the existence of an isomorphous series between xenotime and chernovite, at least in the As-rich portion.

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