A - Human Necessities – 24 – C
Patent
A - Human Necessities
24
C
A24C 5/36 (2006.01) A24D 3/02 (2006.01) B03D 1/02 (2006.01)
Patent
CA 2125911
A method is described for processing waste materials in the form of filter rods, filter cigarettes and the like comprising filter material with inner hollow volumes accessible from the outside and at least one other material component, in particular paper and tobacco, wherein the following process steps are carried out: the waste material is distributed in a liquid in a pressure vessel. By increasing the pressure or decreasing the temperature an inert gas is dissolved in the liquid. Subsequently the temperature is increased or the pressure deceased so that fine gas bubbles develop within the filter material which permits the latter to float whereby a separation from the further material components to be separated is possible. With this method a separation of the waste material into its individual component parts is possible so that for example valuable filter material in the form of cellulose acetate is obtained in highly pure form and can be used again for the production of filter materials.
Rhone-Poulenc Rhodia Aktiengesellschaft
Robic
LandOfFree
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