Soap-making Manual: A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant

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Van Nostrand, 1922 - Soap - 243 pages
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Page 226 - To find the velocity in feet per minute necessary to discharge a given volume of water in a given time, multiply the number of cubic feet of water by 144 and divide the product by the area of the pipe in inches.
Page 158 - ... developed locally by the alkali running into the mixture. When this point is reached the sides of the flask are washed down with carbon-dioxide-free water and the alkali subsequently added drop by drop, mixing after each drop until the desired tint is obtained.
Page 162 - Now add 50 cc. of 50 per cent, sulphuric acid (by vol161 ume) and immerse the vessel in boiling water for two hours and keep protected from dust and organic vapors, such as alcohol, till the titration is completed.
Page 154 - The dish is then allowed to remain on a water bath or top of the oven until the excess water has evaporated and the residue is in such a condition that on returning to the oven at 160 C. it will not spit. The time taken up to this point cannot be given definitely, nor is it important. Usually two to three hours is required.
Page 159 - The result will include acetylisable impurities, if any be present. 2. Determine the total residue at 160 C. 3. Determine the acetin value of the residue at (2) in terms of glycerol. 4. Deduct the result found at (3) from the percentage obtained at (1) and report this corrected figure as glycerol. If volatile acetylisable impurities are present, these are included in this figure.
Page 220 - System The fundamental unit of the metric system is the Meter — the unit of length. From this the units of capacity (Liter) and of weight (Gram) were derived. All other units are the decimal subdivisions or multiples of these. These three units are simply related; eg. for all practical purposes one Cubic Decimeter equals one Liter and one Liter of water weighs one Kilogram.
Page 221 - Measures of Weight 10 milligrams (mg) =1 centigram eg 10 centigrams =1 decigram dg 10 decigrams =1 gram g 10 grams =1 dekagram Dg 10 dekagrams =1 hektogram Hg 10 hektograms =1 kilogram Kg...
Page 153 - ... or most of it, should be evaporated off at this temperature. When only a slight vapour is seen to come off, the dish is removed and allowed to cool. An addition of...
Page 225 - To find circumference of a circle multiply diameter by 3.1416. To find diameter of a circle multiply circumference by .31831. To find area of a circle multiply square of diameter by .7854. To find area of a triangle multiply base by one-half perpendicular height.
Page 156 - Into a stoppered weighing bottle containing a known weight of recently distilled aniline (from 10 to 20 cc.) measure about 2 cc. of the sample, stopper, mix, cool, and weigh. Wash the contents into about 200 cc. of cold water and titrate the acidity as before. This yields the acidity due to the original preformed acetic acid plus...

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