Glycerol and spent lye clarification - Illinois Institute of Technology

From the proportion :-
30H0 :7KCrO ::.5:X.
3 8 3 2 2 7
Half a gram of pure glycerol requires 3.73
grams of potassium dichromate for complete
oxidation. In operation however a slight
excess is used. The dichromate solution as
added to the ©volution flask is made up as
follows :-
4 grams of KgCrgO^.
25 grams of HgO,
15 grams of HgSO^,
The merits of the method may be compared
and suraed up as foil owe:
In the titration method the dichromate
solution is necessarily a somewhat stronger
one, hence the measurements must be made with
the greatest care, attention being paid to
temperature.
In the absorption method all errors are
eliminated, no attention being paid to
temperature.
8g