| Title | Mill Trial of the New Bleaching Agent -THPS |
| Publication Type | Journal Article |
| Year of Publication | 2009 |
| Authors | Hu, TQ, Williams, T, Schmidt, JA, James, BR, Cavasin, R, Lewing, D |
| Journal | Pulp & Paper-Canada |
| Volume | 110 |
| Pagination | 37-42 |
| Date Published | Sep |
| Type of Article | Article |
| ISBN Number | 0316-4004 |
| Keywords | bleach, bleaching, brightness, BRIGHTNESS STABILIZING AGENTS, CHEMISTRY, COMPOUNDS, COSTS, mechanical pulps, PHOSPHONIUM, SODIUM HYDROSULFITE, SULFATE, TERTIARY PHOSPHINES, TETRAKIS(HYDROXYMETHYL)PHOSPHONIUM |
| Abstract | An eight-day mill. trial of adding tetrakis(hydroxymethyl)phosphonium sulfate (THPS) (at 1.0 kg THPS/t pulp) to hydrosulfite (Y) bleaching of spruce SGW pulp shows an average, additional brightness gain of 2.0-2.3 ISO points without any bleach plant or paper machine process upsets. This additional brightness gain, sustained during subsequent one-year commercial implementation of the "THPS + Y" bleaching technology, allows the mill to reach brightness target during the difficult summer period, and to reduce the consumption of expensive brightness-enhancing additives for LWC papers. Overall estimated cost saving to the mill is $250,000/year. |
| URL | <Go to ISI>://000270960500008 |
