In this paper, the protection measures of carbohydrate during pulp TCF bleaching, such as oxygen, ozone, peroxide, peracid and photochemistry reaction of bleaching, were respectively.
The beat method of reducing attack on the cellulose and still obtain a bleachable pulp is to use strong acid, low cooking temperature, and relatively short cooking time.
The pollution and harm caused by dioxine had been paid attention in all over the world.And the bleaching process in pulp and paper making industry is also a source of dioxine.
It exists the option of an alkaline or a neutral cooking to produce bleachable paper pulp, and of acid hydrolysis of the straw to produce furfural and fermentable pentoses to produce methanol.
For example, bleaching powder, bearing the chemical name calcium hypochlorite, contains chlorine, whereas peroxidase-based bleach doesn't contain chlorine.