著者

ディヴィド E. エステベ J. デュリオン C. ミュゲ M. カスターヌ C.

出版者

JAPAN TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY

雑誌

紙パ技協誌 (ISSN:0022815X)

巻号頁・発行日

vol.41, no.6, pp.474-478, 1987

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At the Saint-Gaudens plant of La Cellulose du Rhône et d'Aquitaine (170, 000t/year of bleached hardwood kraft pulp), the replacement of sodium hypochlorite with a mixture of hydrogen peroxide and oxygen gives a high-quality commercial grade of hardwood pulp (whiteness increased by 1 point, with a 20% improvement in the degree of polymerization, a 12% improvement in the breaking length, and 21% improvement in the square root of the product of bursting strength × tearing strength), and this without any loss in the qualities of bulking and opacity. In addition, the savings in chemicals amount to between 30 and 35 Francs perton of commercial pulp (on the basis of 1986 prices), without mentioning the merits of the elimination of sodium hypochiorite production.