METHOD FOR RECOVERING AND RECYCLING PHOSPHOR FOR FLUORESCENT LAMP, AND FLUORESCENT LAMP

摘要

PPROBLEM TO BE SOLVED: To provide a method for recovering and recycling a phosphor for a fluorescent lamp, whereby the phosphor is less affected on luminous characteristics such as luminous colors and color rendering properties when it becomes to a recycled phosphor through the treatment of removing mercury from the phosphor recovered from a fluorescent lamp, and a fluorescent lamp having a high lumen maintenance factor is obtainable without lowering the luminous flux of the fluorescent lamp, when the recycled phosphor is reused as the fluorescent film of the fluorescent lamp; and to provide the fluorescent lamp. PSOLUTION: The recycled phosphor is prepared by the followings: after dispersing a mercury-containing recovered phosphor recovered from the fluorescent film of a fluorescent lamp, into a prescribed amount of a phosphor treating liquid composed of pH 2-5 of an acidic aqueous solution and immersing it in the liquid for a prescribed time, the recovered phosphor is separated from the mercury and recovered from the liquid. The fluorescent lamp having a fluorescent film composed of the recycled phosphor, is also provided. PCOPYRIGHT: (C)2005,JPO&NCIPI