Lectures On Cellulose
Lectures On Cellulose
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In our eReader you can find the full English version of the book. Read Lectures On Cellulose Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Lectures On Cellulose
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The proportion by weight to the wood is 3-5 5-0, according as the digestor is of the rotary or stationary type. It may be assumed that the proportion of SO 2 required for the actual reaction of synthesis is 10 per cent, of the pure wood substance. From the excess of bisulphite solution employed, one-third of the SO 2 is recovered by the simple method of "blowing off" during the digestion and absorbing after cooling, in the freshly-prepared bisulphite liquor.
In comparing the costs of this proce...ss with the alkaline processes, it is evident that the main item of difference is the cost of sulphur, which is lost in the form of sulphonated by- product, compared with the cost of recovery of the soda of the alkaline processes, plus the value of the soda beyond the limit of economic recovery.
In the bisulphite process, moreover, the wood requires selection and more careful preparation, the reaction upon which it depends being obviously specific to lignocellulose ; whereas the alkaline hydrolysis constitutes a universal attack and decomposes bark, cuticular tissues, even knots, and denser forms of lignocellulose.
What to read after Lectures On Cellulose?
You can find similar books in the "Read Also" column, or choose other free books by C F Charles Frederick Cross to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The proportion by weight to the wood is 3-5 5-0, according as the digestor is of the rotary or stationary type. It may be assumed that the proportion of SO 2 required for the actual reaction of synthesis is 10 per cent, of the pure wood substance. From the excess of bisulphite solution employed, one-third of the SO 2 is recovered by the simple method of "blowing off" during the digestion and absorbing after cooling, in the freshly-prepared bisulphite liquor.
In comparing the costs of this proce...ss with the alkaline processes, it is evident that the main item of difference is the cost of sulphur, which is lost in the form of sulphonated by- product, compared with the cost of recovery of the soda of the alkaline processes, plus the value of the soda beyond the limit of economic recovery.
In the bisulphite process, moreover, the wood requires selection and more careful preparation, the reaction upon which it depends being obviously specific to lignocellulose ; whereas the alkaline hydrolysis constitutes a universal attack and decomposes bark, cuticular tissues, even knots, and denser forms of lignocellulose.
What to read after Lectures On Cellulose?
You can find similar books in the "Read Also" column, or choose other free books by C F Charles Frederick Cross to read onlineMoreLess
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