Sökning: "Selective dissolution"

Visar resultat 6 - 10 av 23 avhandlingar innehållade orden Selective dissolution.

1. 6. Hydrometallurgical upgrading of a tetrahedrite-rich copper concentrate

   Författare :Samuel Ayowole Awe; Gouzhu Ye; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

   Sammanfattning : Removal of impurity elements in copper metallurgy is one of the major problems encountered today since pure copper ore reserves are becoming exhausted and the resources of unexploited ores often contain relatively high amounts of antimony, arsenic, mercury and bismuth, which need to be eliminated. The present work aims at pre-treating a tetrahedrite rich complex copper sulphide concentrate by selective dissolution of the impurities, therefore, upgrading it for pyrometallurgical processing. LÄS MER

3. 7. Additive Manufacturing and Mesoporous Materials for Pharmaceutical Applications

   Författare :Christos S. Katsiotis; Ken Welch; Jonas Lindh; Maria Stromme; Ryan Donnelly; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Additive Manufacturing; Fused Deposition Modelling; Semi Solid extrusion; Mesoporous materials; Poorly water soluble drugs; Drug delivery; Teknisk fysik med inriktning mot nanoteknologi och funktionella material; Engineering Science with specialization in Nanotechnology and Functional Materials;

   Sammanfattning : Additive Manufacturing (AM), over the past decade, has evolved into a versatile technology with significant applications in pharmaceutical research. This technology enables the production of drug formulations tailored to individual patients, offering customization in both dosage and dissolution profiles. LÄS MER

4. 8. Integrated Cellulosic Wood Aerogel Structures

   Författare :Jonas Garemark; Yuanyuan Li; Lars Berglund; Gustav Nyström; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aerogel; cellulose; energy harvesting; ionic liquids; nanotechnology; wood; thermal insulation; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Sammanfattning : Highly porous aerogels based on renewable materials that possess structural functionality are appealing for sustainable energy regulation and harvesting. Achieving structural anisotropy provides advantageous directional diffusion and mechanical strength, however, introduces great engineering challenges, such as complex, costly, and time-consuming processing. LÄS MER

5. 9. Investigation of corrosion properties of metals for degradable implant applications

   Författare :Karin Beaussant Törne; Jonas Weissenrieder; Wolf-Dieter Mueller; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; biodegradable; metal; zinc; magnesium; corrosion; electrochemistry; Teknisk materialvetenskap; Materials Science and Engineering;

   Sammanfattning : Nedbrytbara metaller utgör en ny klass av biomaterial med potential attersätta permanenta material i tillfälliga applikationer. Detta för att minskarisken för långvariga biverkningar. LÄS MER

7. 10. Hydrometallurgical recovery of rare earth elements from flourescent lamp waste fractions

   Författare :Cristian Tunsu; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; rare earth elements; recycling; fluorescent lamp waste; solvent extraction; waste treatment; Cyanex 572; leaching; Cyanex 923;

   Sammanfattning : Recovery and reuse of materials is important for a circular economy. In recent years the recovery of critical metals from end-of-life products has received increased attention. Various streams, e.g. LÄS MER