Gangue minerals reactivity in oxidative leaching of uraninite with dilute sulfuric acid from low-grade ores: an approach for better leach liquor purity

2015 ◽  
Author(s):  
V. Madakkaruppan ◽  
Anitha Pius ◽  
T. Sreenivas ◽  
Chanchal Sarbajna
Keyword(s):  
Sulfuric Acid ◽  
Leach Liquor ◽  
Low Grade ◽  
Dilute Sulfuric Acid ◽  
Oxidative Leaching

Influence of microwaves on the leaching kinetics of uraninite from a low grade ore in dilute sulfuric acid

2016 ◽  
Vol 313 ◽  
pp. 9-17 ◽  
Author(s):  
V. Madakkaruppan ◽  
Anitha Pius ◽  
Sreenivas T. ◽  
Nitai Giri ◽  
Chanchal Sarbajna
Keyword(s):  
Sulfuric Acid ◽  
Low Grade ◽  
Leaching Kinetics ◽  
Dilute Sulfuric Acid ◽  
Kinetics Of

Leaching of Niobium from Low-Grade Refractory Ore Using H2SO4 Roast System

2014 ◽  
Vol 997 ◽  
pp. 651-654 ◽  
Author(s):  
Biao Wu ◽  
He Shang ◽  
Wen Cheng Gao ◽  
Jian Kang Wen
Keyword(s):  
Particle Size ◽  
Sulfuric Acid ◽  
Weight Ratio ◽  
Dissolution Kinetics ◽  
Low Grade ◽  
Mass Ratio ◽  
Improved Method ◽  
Dilute Sulfuric Acid ◽  
Roasting Temperature ◽  
Kinetics Of

A new improved method is proposed for the leaching and extraction of niobium from a low-grade refractory niobium–tantalum ore.The ore was roasted and decomposed with concenrated H2SO4 then leached with dilute sulfuric acid. The effects of various factors, such as roasting temperature and time, acid to ore mass ratios,as well as particle size, on the dissolution kinetics of niobium were comprehensively investigated. The optimal conditions were particle size-38μm, roasting temperature 300°C,reacting time 2h and acid to ore mass ratio 1:1. The roasting residue reacted for 2 h with sulfuric acid in the ore/acid weight ratio of 3:1 at 90°C, the niobium was recoveried as high as 90.3%.

scholarly journals Hydrolysis Rate of Hemicellulose (Hardwood Xylan) in Dilute Sulfuric Acid

1969 ◽  
Vol 72 (11) ◽  
pp. 2436-2439 ◽  
Author(s):  
Yoshi KAMIYAMA ◽  
Koichiro GOTOH ◽  
Tatsuyoshi KOBAYASHI
Keyword(s):  
Sulfuric Acid ◽  
Hydrolysis Rate ◽  
Dilute Sulfuric Acid

Dilute sulfuric acid pretreatment of cardoon for ethanol production

2008 ◽  
Vol 42 (1) ◽  
pp. 84-91 ◽  
Author(s):  
Ignacio Ballesteros ◽  
Mercedes Ballesteros ◽  
Paloma Manzanares ◽  
M. José Negro ◽  
J. Miguel Oliva ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Ethanol Production ◽  
Acid Pretreatment ◽  
Dilute Sulfuric Acid ◽  
Dilute Sulfuric Acid Pretreatment ◽  
Sulfuric Acid Pretreatment
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