engleski

Recycling of the Office Papers by Chemical Deinking with Double Stage Flotation

Recycling of paper printed with colour laser printer XEROX PHASER 7700 has been investigated in this work. The recycling was performed by chemical deinking with double stage flotation with the usage of non ionic surfactant. Froths collected by flotation were re-floated in which the increased usage of fibers was achieved. The effective removal of magenta particles (98, 3%), cyan (96, 9%) and carbon ones (91.49%) was proved by the image analysis. The same method was not effective for the identification of the yellow toner particles. During the second flotation the part of the particles which was left after the first flotation was removed. The removal of the coloured toner particles from the suspension by flotation, improves the lightness and the rightness of the recycled sheets. Colorimetric values “ a” and “ b” of all the recycled sheets are extremely low and have approximate values regardless the colours of the recycled output.

office papers; recycling; chemical deinking; double stage flotation

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