Comparison of microleakage on one composite etched with phosphoric acid or a combination of phosphoric and hydrofluoric acids and bonded with several different systems
✍ Scribed by Susanne Szep; Nicole Langner; Silja Bayer; Diana Börnichen; Christoph Schulz; Thomas Gerhardt; Anette Schriever; Joachim Becker; Detlef Heidemann
- Book ID
- 114489696
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 154 KB
- Volume
- 89
- Category
- Article
- ISSN
- 1097-6841
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## Abstract BACKGROUND: Di‐(2‐ethylhexyl)phosphoric acid (D2EHPA, H~2~A~2~) has been used extensively in hydrometallurgy for the extraction of rare earths, but it has some limitations. Synergistic extraction has attracted much attention because of its enhanced extractabilities and selectivities. In
As adsorption characteristics, breakthrough curve and adsorption capacity were investigated using a flow-typed fixed-bed adsorption system for single or binary component, mixed gas systems of toluene and methylethylketone (MEK) on activated carbon (AC) modified with phosphoric acid (PA). In the resu