ChemInform Abstract: COMPLEX FORMATION AND PRECIPITATION REACTION OF TITANIUM(IV) FROM SODIUM CHLORIDE/HYDROCHLORIC ACID AQUEOUS SOLUTION CONTAINING PHOSPHATE

1982 ◽  
Vol 13 (7) ◽  
Author(s):  
H. EINAGA ◽  
Y. KOMATSU
Keyword(s):  
Aqueous Solution ◽  
Sodium Chloride ◽  
Hydrochloric Acid ◽  
Complex Formation ◽  
Precipitation Reaction ◽  
Acid Aqueous Solution

DETERMINATION OF TRACE AMOUNTS OF SILVER IN GALENA ORES

1960 ◽  
Vol 38 (9) ◽  
pp. 1488-1494 ◽  
Author(s):  
E. J. Bounsall ◽  
W. A. E. McBryde
Keyword(s):  
Aqueous Solution ◽  
Nitric Acid ◽  
Sodium Chloride ◽  
Hydrochloric Acid ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Silver Content ◽  
Aqueous Sodium Chloride Solution ◽  
Aqueous Sodium

An analytical method is described for the determination of microgram amounts of silver in galena ores, based on the "reversion" of silver dithizonate. Silver is separated from relatively large amounts of lead by extraction as dithizonate into chloroform from an aqueous 1:99 nitric acid solution. Separation from mercury, which is also extracted under these conditions and would, if present, interfere in the analysis, is achieved by reverting the dithizonate solution with a 5% aqueous sodium chloride solution which is also 0.015 molar in hydrochloric acid. Following dilution of this aqueous solution and adjustment of pH, silver is again extracted into chloroform as the dithizonate, and determined absorptiometrically. Analyses of a number of galena ore samples showed a precision of within 3% for a silver content ranging from 0.03 to 0.4%.Some other methods for isolating silver from these samples, which were tried but found unsatisfactory, are discussed.

Extraction of Tin (Sn) from Solder Dross by Using Hydrochloric Acid Leaching Treatment

2015 ◽  
Vol 754-755 ◽  
pp. 567-570
Author(s):  
Syarifah Aminah Ismail ◽  
Noorina Hidayu Jamil ◽  
Kamarudin Hussin ◽  
Mohd Arif Anuar Mohd Salleh
Keyword(s):  
Aqueous Solution ◽  
Particle Size ◽  
Hydrochloric Acid ◽  
Acid Concentration ◽  
Acid Leaching ◽  
Experimental Results ◽  
Solution Temperature ◽  
Hydrochloric Acid Leaching ◽  
Stirring Time ◽  
Acid Aqueous Solution

This project deals with the experimental results of leaching of Sn from solder dross by means of leaching using different concentration of hydrochloric acid (HCl). Solder dross was sieved to obtain a mean particle size of 75 μm. The solder dross powder obtained was leached by using HCl acid aqueous solution. To optimize the parameter required for recovery of Sn from solder dross, initially the bench scale studies were carried out using varying acid concentration, stirring time and temperature. The experimental indicate that 98.7% of Sn was leached out from solder dross using 0.1M of HCl, 24 hours of stirring time at60°C solution temperature.

scholarly journals Ceramic-like stable CsPbBr3 nanocrystals encapsulated in silica derived from molecular sieve templates

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Qinggang Zhang ◽  
Bo Wang ◽  
Weilin Zheng ◽  
Long Kong ◽  
Qun Wan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
High Temperature ◽  
Hydrochloric Acid ◽  
Quantum Yield ◽  
Molecular Sieve ◽  
Green Phosphor ◽  
Light Emitting ◽  
Photoluminescence Quantum Yield ◽  
Acid Aqueous Solution ◽  
Exceptional Stability

AbstractAchieving good stability while maintaining excellent properties is one of the main challenges for enhancing the competitiveness of luminescent perovskite CsPbX3 (X=Cl, Br, I) nanocrystals (NCs). Here, we propose a facile strategy to synthesize ceramic-like stable and highly luminescent CsPbBr3 NCs by encapsulating them into silica derived from molecular sieve templates at high temperature (600–900 oC). The obtained CsPbBr3-SiO2 powders not only show high photoluminescence quantum yield (~71%), but also show an exceptional stability comparable to the ceramic Sr2SiO4:Eu2+ green phosphor. They can maintain 100% of their photoluminescence value under illumination on blue light-emitting diodes (LEDs) chips (20 mA, 2.7 V) for 1000 h, and can also survive in a harsh hydrochloric acid aqueous solution (1 M) for 50 days. We believe that the above robust stabilities will significantly enhance the potential of perovskite CsPbX3 NCs to be practically applied in LEDs and backlight displays.

A Novel Method for Preparing Biomimetic Oleophobic Surface on X70 Pipeline Steel

2014 ◽  
Vol 513-517 ◽  
pp. 165-168
Author(s):  
Hao Li ◽  
Si Rong Yu
Keyword(s):  
Aqueous Solution ◽  
Contact Angle ◽  
Hydrochloric Acid ◽  
Chemical Etching ◽  
Pipeline Steel ◽  
Low Energy ◽  
Shot Blasting ◽  
X70 Pipeline Steel ◽  
Acid Aqueous Solution ◽  
Novel Method

A novel method for preparing oleophobic surface is presented. In this article, an oleophobic surface on X70 pipeline steel was prepared successfully by the combination of shot blasting, hydrochloric acid aqueous solution etching, and modified with low-energy material. The influences of the concentration of hydrochloric acid and chemical etching time on the oleophobicity were analyzed. And the optimal experimental parameters were determined. The surface morphology and chemical composition were observed by the field emission scanning electron microscopy (FESEM) and energy dispersive spectrometer (EDS), and the contact angle was measured by contact angle meter. The results showed that micro-nanocomposite structure on the substrate was formed after shot blasting and chemical etching of hydrochloric acid aqueous solution. After low-energy modified, the specimen obtained the better oleophobicity, and the maximum contact angle between the surface and peanut oil was 140°.

Sign in / Sign up

Export Citation Format

Share Document