セルロ-スの希硫酸法加水分解における糖収率と濃度の経済性に及ぼす影響について

概要

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Among all the known processes for the acid saccharification of cellulose, such ones which make use of dilute sulfuric acid are the most feasible and, since the Scholler process first introduced, have continued to be employed even today. However, those processes have a difficulty such that they permit a secondary decomposition of glucose to take place as the saccharification reaction proceeds, whereby it is difficult to obtain an improvement in the yield of glucose.<BR>With a view to increase the yield of glucose, there have been proposed a variety of processes. In case of these processes, however, the increase of the yield of glucose brings about the decrease of the concentration of glucose, and the production cost for the concentration of the glucose solution increases.<BR>In view of the above, we have conducted a study on the economy in each of the variety of saccharification processes with dilute sulfuric acid comprising percolation process, plug flow process and counter current process, the studies being done by calculating the yield and the concentration of glucose at the time when a lowest saccharification cost was met in each of the processes. As a result, it was found that counter current process could attain a high value for both the yield and the concentration of glucose and thus came under the most economical process.
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