Obtained in the Manufacture of Cellulose or Paper-pulp.
Year: 1885

page_text: Obtained in the Manufacture of Cellulose or Paper-pulp.
I, HERBERT JOHN HADDAN of 67 Strand, in the city of Westminster, Civil
Engineer, do hereby declare the nature of said invention for PROCESS FOR
PREPARING FODDER FROM CERTAIN WASTE PRODUCTS, OBTAINED IN THE MANU-
FACTURE OF CELLULOSE OR PAPER-PULP, a communication to me from abroad by
Carl Hermann Voigt, Chemist, of Pegau in the Kingdom of Saxony, to bẹ as
follows:-
This invention has for its object, to utilize the carbo-hydrates, protein-bodies,
and other admixtures, which occur in straw or wood, and form a waste- 'or bye-
product in the manufacture of cellulose from straw or wood by digesting it with
soda lye.
After the process of digestion or extraction has been completed, the alkaline
liquor, containing the extracted organic matters, is neutralised by the addition of
sulphuric acid.
During this process, sodium-sulphate is formed, and nearly all organic matter,
dissolved or suspended in the alkaline liquor, is precipitated in a fine state of
division. This precipitate is now relieved of sulphate solution, by means of a
filter press, subsequently washed with water and again pressed, so as to form
cakes, which constitute a compressed food for horses, cattle and sheep.

page_text: Obtained in the Manufacture of Cellulose or Paper Pulp.
3
I, HERBERT JOHN HADDAN, of 67 Strand, in the County of Middlesex, Civil
Engineer, do hereby declare the nature of this invention, a communication to me
from abroad by Carl Hermann Voigt, Chemist, of Pegau, in the Kingdom of
Saxony, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
Straw consists, as known, of about 60 per cent of cellulose, which forms the
skeleton or cellular tissue of the same, and of about 40 per-cent of soluble
intercellular matter (consisting of carbo-hydrates, protein substances etc.) As the
latter, when consumed by animals constitute the nutritious constituent of the
straw and are perfectly assimilable (into flesh and fat) by the animal organism, 1
the inventor pursues the object of recovering in the manner hereinafter described
and in the shape of fodder cakes, these very important nurrishing products,
which, in the manufacture of paste-board and cellulose fromy straw or other
vegetable fibrous material by means of soda are dissolved or extracted by the
alcaline digestion-fluid. The process of digestion being finished, the alcaline liquid,
saturated with organic substances is mixed with sulphuric acid to neutralization.
Thereby all organic substances dissolved in the alcaline liquid, except a little
colouring matter, are precipitated in the shape of a most finely divided. precipitate
under the formation of sulphate of soda. This precipitate is separated from the
solution of sodic sulphate by means of a filter press; subsequently it is again
washed with water and again pressed, and thus it is dried and brought into the
market in the shape of cakes. The product thus obtained has an agreeable smell
and taste similar to that of fresh hay and is readily eaten by horses, cows and
sheep.
f
The remaining so-called mother liquor (solution of sodic sulphate) is concentrated
to crystallisation in an evaporating pan and brought into the market as crystalline
Glauber's salt.
J
Or the sodic sulphate, obtained by this process, may be employed for the
manufacture of soda by the Leblene or the Salvay process.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what
I claim is:
1. The process for obtaining fodder from the nutritious substances contained in
straw and other vegetable fibrous material, substantially as described,
;

page_text: 2. The process for utilising the nutritious bodies which occur in straw, wood or
similar fibrous vegetable matter and form a constituent of the digesting liquor
obtained in the manufacture of cellulose, which process consista in neutralizing
with sulphuric acid the alcaline digesting liquor containing the nutritious organic
matter, so as to form a very fine precipitate, relieving the latter of acid by pressure,
washing the product with water, subjecting the same again to pressure and forming
it into cakes, substantially as described.