Improved Manufacture of Blood Products for Fertilizing, Alimentary, and other Purposes.
Year: 1899

page_text: Date of Application, 1st Dec., 1899-Accepted, 23rd June, 1900
Improved Manufacture of Blood Products for Fertilizing,
Alimentary, and other Purposes.
A communication from EMIL RICHTER, of Leipsigerstrasse 8, Dresden, N.
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, County of London, Chartered
Patent Agent, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
The present invention relates to the manufacture of blood products in which
the basic phosphates are transformed into superphosphates, with soluble phos-
phoric acid. The product obtained in the form of a cake or concentrated mass
is intended to be employed, preferably when reduced to powder as a manure or
fertiliser. As a powder or in blocks it may also be used for the alimentary pur-
poses while it may also be used for other purposes.
An important feature of the process is that evaporation of the blood does not
form part of the process. Consequently the loss of valuable component parts is
avoided and, owing to the manner in which the blood is transformed into a con-
centrated or dry substance the drawbacks connected with the older systems are
overcome, which drawbacks could not be avoided, and in spite of the greatest
care and the use of the best apparatus incrustation of the blood and the burning
of the material took place.
The new manufacture is carried out in the following manner-The blood of
the slaughtered animal is collected in a suitable manner, and in this natural
state, as blood water and thick blood, it is treated with a small quantity say 1 per
cent. of titrated solution of sodium bisulphate at 36° Beaumé. The sodium. bisul-
phate is allowed to act on the mass, which is thoroughly mixed or stirred up every
now and then, until part of the sulphuric acid contained in the solution has with-
drawn the alkali from the blood, which enters into combination with the sul-
phuric acid forming sodium sulphate (besides traces of potassium sulphate).
Owing to this treatment the blood globules are hardened, and lose their tendency
to change their form; while the said globules in their natural state cannot be
detained by any known treatment, passing, as is well known, through any kind
of filtering cloth or the like, whilst they lose this characteristic owing to the re-
action of the sulphate of sodium whereby the whole possible quantity of valuable
matter is obtained. The rest of the sodium bisulphate causes the phosphate to
be converted into superphosphate. In the meanwhile the whole mass is heated
to about 80°-90° C., which can be done without causing any harm to the material
by introducing steam. The object of this treatment is to produce concentration
or congealment of the liquid parts of the water and especially of the blood water.
Care should be taken that the heating should not be carried beyond a certain
point so as to prevent the coagulated albuminous matter from becoming insoluble.
During the treatment the mass is suitably stirred, so as to prevent its component
parts from settling down in the order of their specific gravity, and to produce a
homogeneous mass. The result of this treatment is a cake or concentrated mass
” . A

page_text: which may be cut with a knife although still somewhat elastic to the touch, and
enclosing mechanically only a small quantity of water." The mass is removed
from the vessel, dried on a suitable frame or support and can finally be pressed
into shape, or by means of cylinders or other means, reduced to powder or small
pieces. This product has the great advantage that it retains all the phosphates
contained in the blood, in the form of easily soluble phosphates. It is of impor-
tance when using it as a manure that the bases and acids contained in the powder
and rendered by this process easily. soluble, although separated from their solu-
tions by the absorbing power of the soil, should still be sufficiently held by the
substance of the manure powder, as not to be prematurely dissolved by atmos-
pheric influences so as to be carried too deeply into the ground. This manure
body is also a superior producer of humus or vegetable mould, and besides this
advantage the material possesses the special quality that it admits of a great sub-
division or dilution. The fact that the product contains all the protein substances
in the purest and most soluble form, renders it also a very valuable alimentary
product.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. The manufacture of a blood product in which the basic phosphates are trans-
formed into superphosphates characterised by animal blood being collected in a
vessel, for the purpose by changing the basic phosphate into super phosphate and
hardening the blood globules by the addition of sodium bisulphate and applying
a moderate heat to form a cake or firm mass, which may be dried and pressed into
shape, or cut up or ground to powder, substantially as described.
2. The blood product, substantially as described.
Dated this 1st day of December 1899.
BOULT, WADE & KILBURN,
Agents for the Applicant.