FIELD: process engineering.
SUBSTANCE: invention covers the process of printing ink removal from waste paper. Said process comprises the steps that follow. (a) Transformation of waste paper with prinking ink into aqueous fibrous suspension at pulper whereat said ink is separated from pulp. (b) Flotation of fibrous suspension to remove hydrophobic impurities including printing ink from said suspension. Note here that said flotation is carried out over ink removal chemical additive including modified silicon dioxide obtained by treatment of silicon dioxide hydrophilic particles by hydrophobic organic fluid.
EFFECT: higher yield at flotation with foam control.
16 cl, 12 ex, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF REMOVING PRINT INK FROM WASTE PAPER | 1996 |
|
RU2173366C2 |
| PRODUCTION METHODS OF RECLAIMED PULP, METHODS OF SURFACE MODIFICATION OF BODY STOCK FIBER AND ADMIXTURES AS WELL AS DEVICE FOR PRODUCTION OF PULP | 2004 |
|
RU2365693C2 |
| METHOD OF REMOVING PRINTING INK FROM WASTE PAPER | 2020 |
|
RU2744563C1 |
| METHOD FOR REFINING PRINTED WASTE PAPER | 0 |
|
SU926130A1 |
| METHOD FOR ALKALI TREATMENT OF PRINTED PAPER | 2010 |
|
RU2435892C1 |
| METHOD OF REMOVING PRINTING INKS FROM WASTE PAPER | 1992 |
|
RU2008384C1 |
| METHOD OF CONTROLLING DEPOSITS OF STICKY SUBSTANCES IN PULP COOKING AND PAPER MAKING PROCESSES | 2015 |
|
RU2693604C2 |
| PRINTED PAPER WASTE PROCESSING METHOD | 0 |
|
SU717195A1 |
| AQUEOUS COMPOSITION FOR REMOVAL OF PAINTS FROM PAPER WASTE | 1992 |
|
RU2010902C1 |
| METHOD OF REFINING PRINTED PAPER WASTE | 0 |
|
SU690102A1 |
