Pulp and paper magazine of Canada . n with other cellulose containingraw-materials, that the actual fibre contents of Esparto is atleast 50% or several per cent. more. Th. Routledge employed vomiting boilers in his mill,working we may say, half continuously with about 20 ofthem. The boilers contained a false bottom under whichthe steam entered. Live steam as well as indirect steamcould be used. The first digester being filled with the grassand liquor, is cooked for 2 hours, after which time the solu-tion, still containing a large percentage of free Alkali wouldflow through a pipe and spout in
Pulp and paper magazine of Canada . n with other cellulose containingraw-materials, that the actual fibre contents of Esparto is atleast 50% or several per cent. more. Th. Routledge employed vomiting boilers in his mill,working we may say, half continuously with about 20 ofthem. The boilers contained a false bottom under whichthe steam entered. Live steam as well as indirect steamcould be used. The first digester being filled with the grassand liquor, is cooked for 2 hours, after which time the solu-tion, still containing a large percentage of free Alkali wouldflow through a pipe and spout in No. 2 boiler, while in , fresh liquor enters. Both digesters are then cooked againfor 2 hours, No. 1 receiving fresh liquid, while No. 2 isfilled with solution from digester 1. No. 3 is cooked withthe spent liquor that has served in 1 and 2 digester scheme is followed until the same solution has beenused in 6 boilers, and does not contain any free Alkali any-more. Routledge found also, that the efficient washing of. cheaper wood and straw-pulp. Owing to its comparativelong and strong fibre and its purity, it is best suitable forthe finest grade of papers, and generally commands a betterprice. The plant itself, when young, is very tender and can ad-vantageously be used for feed, while later on the formationof cellulose in stem and leaves is increasing, making it ripefor the pulp industry at the age of about 12 years. Thegrass from Spain is generally considered the best and thisopinion seems to be strengthened by some of the chemicalanalysis. The tests of different chemists vary however con-siderable, most likely owing to discriminated sampling. According to Cross and Bevan the yield on cellulose fromthe raw-materials are:— Esparto from Spain :,s, Esparto from Tripolis Mi , Esparto from other sources 5(1, while Dr. H. Mueller found:— Spanish grass 51 I, African grass 47 5—5(1 2, The actual yield is put to 40-45j and even as high as 48%.It will however depen
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectpaperma, bookyear1903
