Nitrating

In 'nitrating' the lignocelluloses this phenomenon of internal condensation is much more pronounced (see p. 131). ❋ C. F. Cross (N/A)

It is considered probable that the cellulose nitrates are hydrocellulose derivatives, and experimental evidence in favour of this conclusion is supplied by the results of 'nitrating' the celluloses and their oxy - and hydro - derivatives. ❋ C. F. Cross (N/A)

I was often interested in testing recipes for mixtures of oxidizing agents and oxidizeable materials as well as nitrating common household substances. ❋ Unknown (2006)

As five or six charges are often in this house at one time, it is necessary to have as many tanks arranged in tiers, otherwise one or two refractory charges would stop the nitrating house and the rest of the nitro-glycerine plant. ❋ Unknown (N/A)

The lead tank (Fig. 5) is generally cased in woodwork, with a platform in front for the man in charge of the nitrating to stand upon, and whence to work the various taps. ❋ Unknown (N/A)

They must be scoured before they are fit for nitrating. ❋ Unknown (N/A)

The top of the tank is closed in with a dome of lead, in which is a small glass window, through which the progress of the nitrating operation can be watched. ❋ Unknown (N/A)

One of the most useful methods of testing the glycerine, other than nitrating, is to dilute the sample one-half with water, and then to pass a current of nitric peroxide gas through it, when ❋ Unknown (N/A)

He adds ammonium sulphate or ammonium nitrate to the mixed acids during the operation of nitrating, which he claims destroys the nitrous acid formed according to the equation -- ❋ Unknown (N/A)

Now, however, vertical iron cylinders, made of cast-iron, are used for the nitrating operation. ❋ Unknown (N/A)

[Footnote A: Organic matter up to .6 per cent. is not always prejudicial to the nitrating quantities of a glycerine.] ~Silver Test. ❋ Unknown (N/A)

In works where the manufacture of nitro-glycerine is of secondary importance, and some explosive containing only perhaps 10 per cent. of nitroglycerine is manufactured, and where 50 or 100 lbs. of glycerine are nitrated at one time, a very much smaller nitrating apparatus than the one that has been already described will be probably all that is required. ❋ Unknown (N/A)

This gives a great advantage over the usual method of working ordinary centrifugal nitrating apparatus, because the acid being removed before the centrifugal is run, practically all danger of firing therein disappears, and a greater proportion of the waste acid is recovered. ❋ Unknown (N/A)

The acid mixture and the method of nitrating have much to do with the action of the various solvents, so also has the presence of water. ❋ Unknown (N/A)

The drawing (Fig. 7) shows a vertical section of the apparatus; _a_ is the nitrating vessel of usual construction, having at the bottom an acid inlet pipe with three branches, one leading to the de-nitrating plant, _c_ leading to the drowning tank, and _d_, which extends upwards and has two branches, _e_ leading to the nitrating acids tank, and _f_ to the waste acid tank. ❋ Unknown (N/A)

Pat., 297,188, such mixtures are obtained by nitrating benzylchloride and heating with an equimolecular amount of sodium sulphite; the sodium nitrobenzylsulphonate thus obtained is reduced to aminobenzylsulphonic acid with iron and acetic acid, and finally condensed with the calculated amount of _p_-toluenesulphonic chloride. ❋ Georg Grasser (N/A)

Finally, the cage is taken to a plunge tank, where the paper is removed from the cage by simply pulling out the central perforated cylinder B.Fig. 26 shows the nitrating pot, with its automatic cover. ❋ Unknown (N/A)

In some cases the acids and water may be supplied by perforated pipes, lying along the edges of the nitrating vessel, and these edges may, if desired, be themselves made inclined, like the sides of the troughs _f_. ❋ Unknown (N/A)

When nearly all the nitro-glycerine has been separated in this manner the acids in the apparatus may be run off by the pipe _b_ to an after separating vessel for further settling, thus leaving the apparatus free for another nitration, or the nitrating vessel itself may be used as an after separating bottle displacing the nitro-glycerine with waste acid as it rises to the top, or skimming off in the usual manner. ❋ Unknown (N/A)

The glycerine should be contained in a small cistern, fixed in some convenient spot upon the wall of the nitrating house, and should have a pipe let in flush with the bottom, and going through the dome of the nitrating apparatus. ❋ Unknown (N/A)