Studies on Peroxide Addition in Extraction Stage (CEph) on Optical Properties of Bamboo Pulp, 1990 Pulping Conference Proceedings

The bamboo, a non-wood plant, still continues to be a major source of long fibered pulp in India for manufacture of paper, With the changing social, economical and industrial environment, the demand for quality papers is increasing in the country. The paper industry in India is also looking forward to adopt modern technology to upgrade the quality of the product and to improve overall productivity.

However, when we consider bleaching of pulp use o f hypochlorite is still extensive in CEH despite of its known and wall established adverse affects on physical and optical properties of Pulp. The present paper deals with the use of hydrogen peroxide at extraction stage of CEH sequence for pulp bleaching and its efficacy in improving the overall quality of bleached pulp. A dose of 0.396 peroxide (on OD pulp) in CEpH sequence reduced the hypo charge by 30$ at a brightness level of 8O% El, over control CEH sequence. It could also reduce the pulp Post Colour number by 25% and improve the physical strength properties by about 15%. The plant scale trial con-firmed the conclusions arrived at during laboratory study.