Pulp and paper magazine of Canada . ed. To complete the isolation of thecellulose, the solution is made alkaline ^rith sodiumhydrate ( NaOH), after which the boiling iscontinued 2-3 minutes. The fibrous mass is thrown ona cloth filter and washed thoroughly. This residue isthe most pure cellulose; and the entire elimination ofthe non-cellulose components of the original fiber isshown by failure to react with the various reagentspreviously cited. Tlie following are important quantitative data. Theyellow chlorinated derivative has the empirical for-mula CisHigCliOg; to form this derivativ
Pulp and paper magazine of Canada . ed. To complete the isolation of thecellulose, the solution is made alkaline ^rith sodiumhydrate ( NaOH), after which the boiling iscontinued 2-3 minutes. The fibrous mass is thrown ona cloth filter and washed thoroughly. This residue isthe most pure cellulose; and the entire elimination ofthe non-cellulose components of the original fiber isshown by failure to react with the various reagentspreviously cited. Tlie following are important quantitative data. Theyellow chlorinated derivative has the empirical for-mula CisHigCliOg; to form this derivative the fibersubstance (purified and prepared-by the boiling withalkali) takes up 8% of its weight in combination; atthe same time an equal amount goes to form hydro-chloric acid. The proportion of cellulose yielded isapproximately 73-807«, according to the quality (andpurity) of the fiber. This cellulose is a mixture of twocelluloses — alpha-cellulose, resembling the normalcotton cellulose, and beta-cellulose, a furfural-yielding. fig. 1—Plant of the Elettrocliiraica PomiUo, Naples, forManufacture of Caustic Soda. Chlorine, and Pulp. 1. Electric Power Station. 2. Electrolytic Cell Room. 3. Salt Storage. 4. Electric Evaporator and Caustic Fusion Pot. 5. Chlorine Liquifying Plant. 6. Javelle Water (Sodium Hypochlorite Solution). 7. Hydrogen Compressor. S. Synthetic Hydrochloric Bleaching Powder. 10. Cellulose. 11. Boilers. 12. Storage for Hemp Stalks, the 1256 PULP AND PAPER MAGAZINE December 15, 1921. cellulose—and much less resistant to hydrolytic treat-ments, both acid and alkaline. In other processes ofattacking the fiber for the isolation of cellulose, thislatter is hydrolyzed and dissolved and the yield fallsto 62-66%. On page 71 of the above mentioned treatise; theauthors insist on the fact that the chlorination methodis the most suitable and the perfect for the separ-ation of cellulose in the laboratory. They also makemention of two other methods, one
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