Leather Trades Chemistry: A Practical Manual on the Analysis of Materials and Finished ProductsC. Griffin, limited, 1908 - 290 pages |
Other editions - View all
Leather Trades Chemistry: A Practical Manual On the Analysis of Materials ... Samuel Russell Trotman No preview available - 2023 |
Leather Trades Chemistry: A Practical Manual on the Analysis of Materials ... S. R. Trotman No preview available - 2017 |
Common terms and phrases
acetic acid added adulterants alcohol alkali allowed to stand ammonia ammonium analysis bark beaker blue boiling bromine brown c.c. of water calcium carbonate cent chloride chromic chromic acid Collegium colour colourless containing cubic centimetres cuticle dark decinormal decolorised detannised determined dilute dish dissolved distilled water dried estimated ether evaporated excess extract fatty acids filter paper filtrate flask funnel gallic acid Gallotannic acid gelatine gives glue green grms heated hide powder hydrochloric acid ignited insoluble layer leather lime liquid liquor litre method methyl orange mixture nitric acid nitrogen obtained orange oxide oxidised permanganate phenolphthalein pink potassium precipitate present quantity Quebracho reaction residue salt sample shaking soap soda sodium sodium carbonate soluble matter specific gravity sulphate sulphuric acid sumach tannic acid tannin tannin solution tanning materials temperature tested thiosulphate titrated total soluble tube turbidity unsaponifiable unsaponifiable matter violet volume washed water-bath weighed wool yellow
Popular passages
Page ii - The Work comprehends as far as possible ALL RULES AND TABLES required by the Analyst, Brewer, Distiller, Acid- and Alkali-Manufacturer, &c., &c. ; and also the principal data in THBRMO-CHBMISTRY, ELECTRO-CHEMISTRY, and the various branches of CHEMICAL PHYSICS.
Page 198 - ... free flame until saponification is complete, probably a little over 2 minutes; then add 1.5 cc. acetic acid, or just sufficient to neutralize the alkali, mix well, cool rapidly in water at 17° to 19°, and let stand at this temperature for at least 30 minutes, shaking occasionally ; then add 50 cc. 70 per cent alcohol containing 1 per cent by volume of hydrochloric acid of 1.16 sp. gr., shake well, and again place in the cold water for 1 hour. In the absence of arachis oil the liquid should...
Page ii - Will rank as the STANDAKD ENGLISH AUTHORITY on OILS and FATS for many fears to come." — Industries and Iron In Two Volumes^ Half Morocco^ each complete in itself* PHYSICO-CHEMICAL TABLES For the Use of Analysts, Physicists, Chemical Manufacturers and Scientific Chemists. Volume I. — Chemical Engineering, Physical Chemistry.
Page 149 - The moisture in the air-dried powder is estimated and the quantity equal to 6.5 grm. actual dry hide powder is calculated, which will be practically constant if the powder be kept in an air-tight vessel. Any multiple of this quantity is taken according to the number of analyses to be made and wetted again with approximately 10 times its weight of distilled water.
Page 78 - The solution is boiled, filtered into a 200 cc flask, the residue well washed and the volume adjusted after cooling. The cupric reduction of 20 cc is...
Page 137 - Squeeze thoroughly by hand and remove as much water as possible by means of a press, weigh the pressed hide, and take approximately one-fourth of it for moisture determination. Weigh this fourth carefully and dry to constant weight. Weigh the remaining three-fourths carefully and add them to 200 cubic centimeters of the original solution; shake for 10 minutes and squeeze the tanned hide through linen.
Page 147 - The total solubles must be determined by the evaporation of a measured quantity of the solution previously filtered till optically clear both by reflected and transmitted light ; that is, a bright object such as an electric light filament must be distinctly visible through at least 5 cms.
Page 137 - Shake 10 grams of hide powder with 250 cc of water for five minutes, strain through linen, squeeze the magma thoroughly by hand; repeat this operation three times, pass the last filtrate through paper (S. and S. No. 590, 15 cm) till clear, evaporate 100 cc, and dry.
Page 150 - The results shall be reported as shown by the direct estimation, but it is desirable that in addition efforts shall be made, by determination of acids in the original solution and in the non-tannin residues, to ascertain the amount of lactic and other non-volatile acids absorbed by the hide powder, and hence returned as
Page 149 - This solution is added to the powder and the whole churned slowly for 1 hour. In laboratories where analyses are continually being made, it is more convenient to use a 10 per cent. stock solution, made by dissolving 100 grms.