scholarly journals Removal of zinc from a base-metal solution using ion exchange at Rustenburg Base Metal Refiners

2014 ◽  
Vol 89 (6) ◽  
pp. 919-926 ◽  
Author(s):  
Jacob J. Taute ◽  
Kathryn C. Sole ◽  
Edmund Hardwick
Keyword(s):  
Ion Exchange ◽  
Base Metal ◽  
Metal Solution

scholarly journals The Pyrolysis of Glycerol Using Microwave for the Production of Hydrogen

2015 ◽  
Vol 9 (7) ◽  
pp. 74 ◽  
Author(s):  
Lailatul Qadariyah ◽  
Mahfud Mahfud ◽  
Pantjawarni Prihatini ◽  
Sofyan Hadi ◽  
Yuni Kurniati
Keyword(s):  
Activated Carbon ◽  
Ion Exchange ◽  
High Temperatures ◽  
Microwave Power ◽  
Allyl Alcohol ◽  
Glycerol Solution ◽  
Metal Solution ◽  
Production Of Hydrogen ◽  
The Difference

The purpose of this research was to study pyrolysis of glycerol to produce hydrogen using microwave. The useof microwave aimed to produce high temperatures, because pyrolysis require high temperature.The effect of kindof catalyst and microwave power were studied. The catalyst was activated carbon and Ni/HZSM-5.The catalystof activated carbon was ready to use, whereas Ni/HZSM-5 catalyst was obtained by ion exchange fromNa-ZSM-5 with NH4Cl and then HZSM-5 was impregnated with metal solution of Ni (NO3)2.6 H2O.Experiments were conducted by mixing catalyst in the reactor together with glycerol solution of 10% (weightpercent) as much as 100 ml. Reactor was made from pyrex and mounted on microwave equipped with athermocouple. And then, reactor was heated on power of 400-700 Watt during thirty minutes. The reactionproduced gases and liquid to be analyzed by chromatography gas.The conclusion stated that microwave couldpyrolysis glycerol into hydrogen. By product of this reaction were methanol, allyl alcohol, acrolein andunidentified products. The difference of catalyst produced different product as well. The pyrolysis of glycerolusing activated carbon produced conversion of 60 %, while using catalysts Ni/HZSM-5 obtained conversion of87 %. The reaction produced hydrogen gases was relatively small for both of catalysts that is minimum of 0,59%and maximum of 0,88%.

scholarly journals Ion exchange recovery of silver from concentrated base metal-chloride solutions

2015 ◽  
Vol 152 ◽  
pp. 100-106 ◽  
Author(s):  
Sami Virolainen ◽  
Mikko Tyster ◽  
Mika Haapalainen ◽  
Tuomo Sainio
Keyword(s):  
Ion Exchange ◽  
Base Metal ◽  
Metal Chloride ◽  
Chloride Solutions

Embedding Procedure for Water Swollen Samples

1970 ◽  
Vol 28 ◽  
pp. 504-505
Author(s):  
Ann M. Thomas ◽  
Virginia Shemeley
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ion Exchange ◽  
Structural Changes ◽  
Cross Linking ◽  
Ion Exchange Resins ◽  
Transmission Electron ◽  
First Pass ◽  
Exchange Resins

Those samples which swell rapidly when exposed to water are, at best, difficult to section for transmission electron microscopy. Some materials literally burst out of the embedding block with the first pass by the knife, and even the most rapid cutting cycle produces sections of limited value. Many ion exchange resins swell in water; some undergo irreversible structural changes when dried. We developed our embedding procedure to handle this type of sample, but it should be applicable to many materials that present similar sectioning difficulties.The purpose of our embedding procedure is to build up a cross-linking network throughout the sample, while it is in a water swollen state. Our procedure was suggested to us by the work of Rosenberg, where he mentioned the formation of a tridimensional structure by the polymerization of the GMA biproduct, triglycol dimethacrylate.

Sign in / Sign up

Export Citation Format

Share Document