The Romance of Modern Chemistry
Forfatter: James C. Phillip
År: 1912
Forlag: Seeley, Service & Co. Limited
Sted: London
Sider: 347
UDK: 540 Phi
A Description in non-technical Language of the diverse and wonderful ways in which chemical forces are at work and of their manifold application in modern life.
With 29 illustrations & 15 diagrams.
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VALUABLE SUBSTANCES
the gasworks alone in the form of ammonium sulphate
is enormous—about 160,000 tons. It is valued as a
nitrogenous manure, and large quantities of it are exported
to Germany and other countries for this purpose.
The remaining primary by-product of coal-gas manu-
facture is tar, the unlovely qualities of which need no
exposition. Yet out of this dirty, sticky substance the
chemist has been able to evolve all manner of useful and
wonderful things, as we shall see presently. To begin
with, we may note that the tar helps to pay the cost of
producing coal gas, as is shown by the following table.
This gives approximately the amounts of the various
charges incurred in manufacturing 1000 cubic feet of coal
gas, as well as the prices which the by-products or
residuals will fetch.
Cost of 1000 Cubic Feet of Gas
s. d.
2 cwts. coal at Ils. 6d. per ton . . 1 If
Purification ...... 0 O|
Salaries................................0 0|
Wages........................................ 2>
Maintenance ...... 0
Total.............................1 8|
Returns from Residuals of 2 cwts. Coal
s. d.
Coke...................................0 6
Tar, 1 gallon . , , , . o 1|
Ammonia products , . . , 0 2|
Total............................o 9|
The net cost, therefore, of making 1000 cubic feet of gas
in the holder is about lid.
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