Osram Gesellschaft MIT Beschraenkter Haftung

Ledvance Gmbh

Osram Gmbh

Osram Ag

Robert Otto

Agnieszka Wojtalewicz-Kasprzak

Armin Konrad

Renate Hirrle

Joerg Strauss

Jörg Strauss

A phosphor for low-pressure discharge lamps is disclosed, wherein the phosphor is present in the form of phosphor grains coated with a protective layer, wherein the protective layer consists of a metal oxide, a metal borate, a metal phosphate or mixtures thereof.

Illuminant and illuminant lamp comprising said illuminant

Method of recovery of rare earths from fluorescent lamps. The method comprises six steps. The individual process steps are: Mechanical separation of coarse components. Separation of the halophosphate. Extraction in acids of easily soluble rare-earth fluorescent substances (mainly Y, Eu-oxide) Extraction in acids of rare earth fluorescent substances which dissolve with difficulty (for example rare-earth phosphates) Breakdown of the remaining components which contain rare earths (for example rare-earth-aluminates) Final treatment.

Method for recovery of rare earths from fluorescent lamps

Method for recovery of rare earths from fluorescent lamps. The method comprises six steps. &#x2022;The individual process steps are: Mechanical separation of coarse components. &#x2022;Separation of the halophosphate. &#x2022;Extraction in acids of easily soluble rare-earth fluorescent substances (mainly Y, Eu-oxide) &#x2022;Extraction in acids of rare-earth fluorescent substances which dissolve with difficulty (for example rare-earth phosphates) &#x2022;Breakdown of the remaining components which contain rare earths (for example rare-earth-aluminates) &#x2022;Final treatment.

Growing community of inventors

Stadtbergen, Germany

Robert Otto