For many Nitrations a mix of Sulfuric Acid and Nitric Acid
is used. The typical ratio is 60% Sulfuric Acid and 40%
I generally make this with Concentrated Sulfuric Acid and
Solution Grade Agricultural Calcium Nitrate prills. I pour
a quantity of Calcium Nitrate prills into a suitable bottle
then cover the prills with the concentrated Sulfuric Acid
just over the top of the prills. I then set the capped bottle
aside for several days until the reaction completes and
the resultant Calcium Sulfate settles to the bottom of the
bottle. The mixed acid will be a clear solution which can
be carefully poured off to separate it from the bottom
layer of Calcium Sulfate.
This mix of Sulfuric Acid and Nitric Acid works very well for
Nitration of Cellulose, Starch or various Sugars.
The mix could also be distilled if desired to separate out
the concentrated Nitric Acid.
I haven't seen this procedure on any YouTube video yet
but it is very old and one I've always used.