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This is then followed by isomerization and hydrogenation.
Conversely, the degree of hydrogenation can be very low and in this case the aromatic fraction will grow at the expense of the naphtenic fraction.
Only partial hydrogenation of carbon black may reproduce the interstellar extinction peak.
Furthermore, they present a certain versatility : their degree of hydrogenation and hence their aromatic and naphtenic content can change according to the environment where these molecules are present.
Coal is the basic ingredient in the production of electricity, in hydrogenation, in the manufacture of by-pro- ducts and of chemicals and of gas.
Then there is the study of the enrichment of lean gas by methane, propane, butane and refinery gases, and by the hydrogenation of oil.
Hydrogenation seems to be in an entirely different category.
In all cases tar oils are produced which form a valuable raw material for, or are best processed by, hydrogenation.
The other is hydrogenation, in which coal is heated and hydrogen at high pressure added.
There are already one or two patents, or three or four, in connection with low temperature carbonisation of coal and hydrogenation.
I remember attending a meeting at which the prospects of hydrogenation of oil were explained by a person who was called an expert.
It is not a matter of asking one particular firm which is going to engage in the hydrogenation process.
It is a vital thing for the country to see that this new process of hydrogenation is tried out.
Let no one under-rate the tremendous task that lies ahead in achieving success in the economic hydrogenation of coal.
We say that it -should include the coal mines, the gas industry, and the electrical industry, together with the new carbonisation and hydrogenation industries.
