scholarly journals Conversion of Levulinic Acid from Various Herbaceous Biomass Species Using Hydrochloric Acid and Effects of Particle Size and Delignification

Energies ◽  
2018 ◽  
Vol 11 (3) ◽  
pp. 621 ◽  
Author(s):  
◽  
Keyword(s):  
Particle Size ◽  
Hydrochloric Acid ◽  
Levulinic Acid ◽  
Herbaceous Biomass

Experimental Study on Concentrating Scandium by Leaching from Associated Scandium Ore

2013 ◽  
Vol 734-737 ◽  
pp. 1033-1036
Author(s):  
Gui Fang Zhang ◽  
Peng Yan ◽  
Qing Rong Yang
Keyword(s):  
Experimental Study ◽  
Particle Size ◽  
Hydrochloric Acid ◽  
Acid Concentration ◽  
Hydrochloric Acid Concentration ◽  
Leaching Rate ◽  
Optimal Conditions ◽  
Research Results ◽  
Solid Ratio ◽  
Leaching Residue

Based on the benefication of the complex silicate ore containing scandium, the research about aid-leaching agent used in the leaching of the scandium concentrate was been conducted. And the suitable leaching agent and aid-leaching agent which the useful ions entered into leaching liquid and the harmful ions were kept in leaching residue were been found according to the experiment results. For the scandium of sample existed various complex silicate ore as isomorphism form, the research has adopted hydrochloric acid with aid-leaching agent to dissociate the silicate ore and make scandium entering into solution. The research results has shown that the scandium leaching rate could reach 92.06% under the optimal conditions which the hydrochloric acid concentration is 22.8%, the dosage of aid leaching agent is 6%, liquid solid ratio is 4:1, particle size of leaching material totally is less than 0.15mm and leaching time is 8h.

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 Recovery of cobalt and molybdenum from consumed catalyst using hydrochloric acid

2021 ◽  
Vol 882 (1) ◽  
pp. 012004
Author(s):  
D K Sutama ◽  
A Prasetya ◽  
H T B M Petrus ◽  
W Astuti
Keyword(s):  
Particle Size ◽  
Hydrochloric Acid ◽  
Petroleum Refinery ◽  
Agitation Speed ◽  
Acid Solutions ◽  
Hydrometallurgical Process ◽  
Potential Source ◽  
Hydrochloric Acid Solutions ◽  
Valuable Metals ◽  
Leaching Experiment

Abstract Cobalt and molybdenum are valuable metals whose presence in nature is very limited. The consumed catalyst, which is abundantly available in the petroleum refinery industry, is a potential source of those metals. A hydrometallurgical process using acid as a leaching agent is usually used to extract and separate the metals more effectively. This method is considered capable of yielding recovery of a higher percentage of metal. In this study, hydrochloric acid solutions at various concentrations of 1.0, 1.5 and 2 M were used. The consumed catalyst was obtained from Pertamina Refinery Unit IV, Cilacap, Indonesia. Leaching experiment was carried out for 300 minutes and sampling was undertaken at 1, 3, 5, 15, 30, 90 and 300 minutes. The particle size and agitation speed were fixed at 200 mesh and 400 rpm. Samples of consumed catalyst were analyzed using EDXRF before the leaching process. Samples of solution were analyzed using ICP-EOS. Experimental results have shown that the recovery of cobalt and molybdenum increases with the increase of either concentration of hydrochloric acid or temperature. The highest recoveries in cobalt and molybdenum were 34.66% and 5.03%, respectively, obtained at a concentration of hydrochloric acid of 2 M and temperature 60°C.

Preparation of Iron Oxide Red from Red Mud

2013 ◽  
Vol 826 ◽  
pp. 92-96
Author(s):  
Zheng Xian Ma ◽  
Qiao Ling Liu ◽  
Lan Qin Wang ◽  
Lu Feng Pang
Keyword(s):  
Particle Size ◽  
Iron Oxide ◽  
Hydrochloric Acid ◽  
Chemical Analysis ◽  
Quality Indicators ◽  
Red Mud ◽  
Chemical Precipitation ◽  
Bayer Process ◽  
Optimal Experimental Condition ◽  
Particle Size Analyzer

With using the red mud of Bayer process and industrial hydrochloric acid as main initial materials, iron oxide red was prepared by chemical precipitation technique. The character of the sample were characterized and analyzed by means of XRD, SEM, particle size analyzer, and chemical analysis methods, respectively. The optimal experimental condition of extraction of iron from red mud was obtained, and the key quality indicators of sample was conformed the requirements of iron oxide red by a variety of test and characterization.

Influence of Physical and Chemical Properties on the Activity of Fly Ashes

1987 ◽  
Vol 113 ◽  
Author(s):  
F. Sybertz
Keyword(s):  
Particle Size ◽  
Fly Ash ◽  
Hydrochloric Acid ◽  
Potassium Hydroxide ◽  
Chemical Properties ◽  
Experimental Program ◽  
Physical And Chemical Properties ◽  
Fly Ashes ◽  
Physical And Chemical ◽  
And Chemical Properties

ABSTRACTIn an experimental program, the suitability of various methods for testing the pozzolanic activity of fly ash was investigated. The research was conducted on virtually all fly ashes approved as concrete additives in Germany. This paper discusses differences in the particle size distribution and the solubility on dissolution with hydrochloric acid and potassium hydroxide of the fly ashes. It also reports on interrelationships between the physical and chemical properties of the fly ashes and the workability and strength of mortars containing fly ash.

scholarly journals The study of the process of physic-chemical destruction of coal by the method of physical modeling

2019 ◽  
Vol 109 ◽  
pp. 00054
Author(s):  
Serhii Makeiev ◽  
Serhii Andreiev ◽  
Hennadii Ryzhov
Keyword(s):  
Particle Size ◽  
Hydrochloric Acid ◽  
Surface Energy ◽  
Physical Modeling ◽  
Laboratory Experiments ◽  
Physical Simulation ◽  
Treated Area ◽  
Chemical Destruction ◽  
Clay Rocks ◽  
Physical And Chemical

One of the possible ways of physic-chemical destruction (PCD) of coal was considered. It is established that condition of the realization of a principle possibility of spontaneous dispersion of coal is to reduce its surface energy by 40-60 J/m2. Laboratory experiments to study the PCD of coal in different liquids were conducted. According to the results, kinetic curves of swelling coal in them transition D-G stamps is presents. It was established that the most intensive physical and chemical destruction of the coal to a particle size from tenths to tens of millimeters occurs in solutions of methylamine and hydrochloric acid. The most severe swelling of the coal was noted in those environment as well. The intensity of swelling is not significantly associated with the characteristics of wetting. The influence of various effects on the PCD parameters of coal was studied by physical simulation. The total time the chemical destruction of coal on the treated area was calculated. It was proposed method PCD for coals occurring in the clay rocks of various stages of catagenesis.

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