This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 Excerpt: ... M.P. of crystals (page 39). If lower than 710 C, recrystallise from 90 per cent. alcohol. Add correction for solubility in 90 per cent. alcohol, as below (Table I), and for total volume of 70 per cent. alcohol used in precipitating and washing (Table II). Table I. Correction per 100 c.c. of go per cent, alcohol used ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 Excerpt: ... M.P. of crystals (page 39). If lower than 710 C, recrystallise from 90 per cent. alcohol. Add correction for solubility in 90 per cent. alcohol, as below (Table I), and for total volume of 70 per cent. alcohol used in precipitating and washing (Table II). Table I. Correction per 100 c.c. of go per cent, alcohol used for crystallisation and washing (Archdutt). TABLE II. Correction per 100 c.c. of 70 per cent, alcohol used for washing. 7. In case there are no crystals from 90 per cent. alcohol, or only a very small amount, reduce strength of alcohol to 70 per cent. (31 c.c. water to 100 c.c. 90 per cent. alcohol). Crystallise at 170--190 for 1 hour, filter, wash with 70 per cent. alcohol and weigh as before, adding correction for 70 per cent. alcohol (Table II). If the M.P. of acids is below 710 C, recrystallise from a small quantity of 90 per cent. alcohol or again from 70 per cent. alcohol. The results obtained are shown in the table on previous page. Example Weight of fatty acids obtained o-o355 grm. M.P. of crystals...... 720 C. Total volume of 70 per cent. alcohol used (including original 100 c.c.) 100+75 + 80=255 c.c. Correction = 255 x 730s=0-'I35 Srm-(Table II.) Total volume of 90 per cent. alcohol used 65 + 30=95 c.c. Temperature of alcohol = 150 C. Correction = 95X-= T3l3 grm. (Table I.) Weight of fatty acids and corrections 0 0803 gTM Factor (Table ll) = 20... Arachis oil per cent.=i x 0803 x 20=32 per cent. RENARD'S METHOD Definition This method gives an approximate estimation of the Arachidic and Lignoceric acids present in an oil. Outline of Method The oil is saponified, the fatty acids liberated by hydrochloric acid, dissolved in ether, the ethereal solution evaporated, and the fatty acids, dissolved in 90 per cent. alcohol, precipitated...
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Add this copy of Technical Handbook of Oils, Fats and Waxes, Volume 2... to cart. $54.87, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2012 by Nabu Press.