| 摘要 |
Hydrogen peroxide for cellulose pulp bleaching is produced directly at a pulp mill without electrolysis. Hydrogen is produced from black liquor from the pulp mill pulping process, and that hydrogen is then reacted (e.g. with oxygen and anthraquinone) to produce hydrogen peroxide, which is in turn used to bleach pulp in a P stage directly on site. The hydrogen is produced from the black liquor by heat treatment to produce an off-gas containing DMS, and other hydrocarbons. Hydrogen can be produced from the off gas in a number of ways, including by reacting it with a melt in a recovery boiler, or ash from a recovery boiler. |
