IMPROVEMENTS IN THE TREATMENT OF MALT OR OTHER MATERIALS EMPLOYED IN BREWING
Year: 1876

page_text: LETTERS PATENT to Alfred Blake, of Newport, in the County of Monmouth,
Brewer, for the Invention of "IMPROVEMENTS IN THE TREATMENT OF MALT OR
OTHER MATERIALS EMPLOYED IN BREWING."
"
IMPROVE-
PROVISIONAL SPECIFICATION left by the said Alfred Blake at the Office
of the Commissioners of Patents on the 22nd April 1876.
ALFRED BLAKE, of Newport, in the County of Monmouth, Brewer.
MENTS IN THE TREATMENT OF MALT OR OTHER MATERIALS EMPLOYED IN BREWING."
My Invention relates more particularly to the treatment of grains after the whole
or a portion of the wort has been drawn off from them in the usual manner in order
to obtain therefrom an additional quantity of extractive matter, which may be
utilized in solution in a subsequent brewing or evaporated to a semi-solid con-.
sistence.
According to one mode of carrying out my Invention in order to effect this
object I take the grains after the whole or a portion of the wort has been extracted
therefrom as before mentioned and mix with them in the proportion to every S
bushels of grist originally employed, say, from about 12 gallons to 30 gallons of
water, in which an acid, by preference sulphuric acid, has been mixed in the
proportion of, say, from 1 to 21 per cent. I then heat the whole to an elevated
temperature, which is maintained for a sufficient period to effect the solution of the
substances required to be obtained, and I draw off from the grains the liquid so
obtained, and neutralize the acid by the employment of alkalies in any usual or
suitable manner; or I may neutralize the acid previously to the withdrawal either
in whole or in part of the liquid from the grains. When the liquid has been drawn
off from the grains I wash the refuse grains in the usual manner if found desirable.
By my process I thus obtain an additional quantity of matter which would be
otherwise insoluble for utilization in brewing, whilst the sulphates produced form a
valuable adjunct to the raw wort for succeeding operations.
According to another modification I introduce the grains after the whole or a
portion of the wort has been extracted from them as before mentioned into a
powerful press, and there subject them to sufficient pressure to express the semi-
fluid starchy and other substances which they contain. To the semi-fluid extract
thus obtained I add an acid, by preference sulphuric acid, in sufficient proportion to
Price 4d1

page_text: convert the starchy and otherwise insoluble constituents into a soluble matter
capable of being utilized in brewing, which I heat to an elevated temperature either
with or without the addition of water, the said temperature being maintained until
the requisite conversion is effected, after which the acid is neutralized as before
mentioned.
If desired and under special conditions of the grist a portion of the sulphuric or
other acid may be employed with advantage at an earlier stage, say, for example,
in the first or second mash.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Alfred Blake in the Great Seal Patent Office on the 21st October 1876.
ALFRED BLAKE, of Newport, in the County of Monmouth, Brewer. "IMPROVE-
MENTS IN THE TREATMENT OF MALT OR OTHER MATERIALS EMPLOYED IN BREWING."
This Invention relates more particularly to the treatment of grains after the
whole or a portion of the wort has been drawn off from them in the usual manner
or separated by other means in order to obtain therefrom an additional quantity of
extractive matter, which may be utilized in solution in and for a subsequent brewing,
or the same may be evaporated to a semi-solid consistence.
According to one mode of carrying out this Invention in order to effect this object I
. take the grains after the whole or a portion of the wort has been extracted therefrom,
as before mentioned, and mix them in the proportion to every eight bushels of grist
originally employed, say, with from about twelve gallons to thirty-six gallons of water
or more, in which an acid, by preference sulphuric acid, such for example as com-
mercial sulphuric acid, has been mixed in the proportions of, say, from about one to
about two and a half per cent., but a larger quantity may be employed. I then heat
the whole to an elevated temperature, say to about 200° Fahrenheit, which tempera-
ture is maintained for a sufficient period to effect the conversion of the substances it
is desired to obtain; and I then draw off from the grains the liquid so obtained and
neutralize the acid by the employment of alkalies or of alkaline earth, such as lime,
or by means of carbonate of lime in any usual or suitable manner, or I first neutralize
the acid previous to the withdrawal of the solution containing the extractive matter
either in whole or in part and then withdraw the same, but I prefer the former
method. When the solution resulting from either of the before-mentioned methods of
treatment has been drawn off from the grains I wash the refuse grains in the usual
manner if found desirable. By my process I thus obtain an additional quantity
of extractive matter which would otherwise be insoluble and incapable of being
utilized for brewing, whilst the sulphates and more especially when sulphuric acid
and either lime or carbonate of lime are employed, the sulphate of lime produced
forming a valuable adjunct to the raw wort for succeeding operations or for mixing
with the brewing then in process.
According to another modification of this Invention I introduce the grains after
a whole or a portion of the wort has been extracted from them as before mentioned
into a powerful press and there subject them to sufficient pressure to express the
semi-fluid starchy and other substances which they contain. To the semi-fluid
extract thus obtained I add an acid, by preference sulphuric acid, in sufficient pro-
portion to convert the starchy and otherwise insoluble constituents into soluble
matter capable of being utilized in brewing, which I heat to an elevated tempera-
ture, say to about 200° Fahrenheit, either with or without the addition of water,
the said temperature being maintained until the requisite conversion is effected, after
which the acid is neutralized as before mentioned, and the neutralized solution is
then capable of being employed for the purposes of brewing.
The last part of my Invention relates to the addition of either sulphuric or other
acids, by preference sulphuric acid, to the water or liquor to be subsequently em-
ployed at an earlier stage, say, for example, in the first or second mash or sparge,

page_text: such acid being subsequently neutralized, that is to say:-I firstly treat the water
or liquor to be employed for the purposes of brewing with sulphuric acid, and then
neutralize with an alkali or with an alkaline earth, such, for example, as lime, or by
means of carbonate of lime, and which neutralization may be effected in manner
following, videlicet, by mixing an acid, sulphuric acid by preference, in the proportion
of about from one to two and a half per cent., but a smaller quantity according to the
result it is desired to obtain may be employed with the water or liquor intended to
be used for the first mash of the brew, and after mixing and neutralizing the same
with an alkali or with an alkaline earth, such as lime, or with carbonate of lime,
employing rather more than is necessary to effect neutralization, and then heating
and mashing with the water or liquor so prepared in the ordinary manner.
Having now described and particularly ascertained the nature of my said Inven-
tion and the manner in which the same is or may be used or carried into effect, I
would observe in conclusion that what I consider to be novel and original and
therefore claim as the Invention secured to me by the berein-before in part recited
Letters Patent is-
First. The treatment of grains after the whole or a portion of the wort has been
separated so as to obtain an additional amount of extractive matter therefrom by
firstly submitting the same to the action of dilute acids, sulphuric acid by prefer-
ence being employed, and then subsequently neutralizing the solution obtained in
order to render it capable of being employed for the purposes of brewing in the
manner berein-before described.
Second. The treatment of the viscous solution obtained by subjecting the residual
grains from brewing to pressure, so as to obtain a further portion of extractive
matter therefrom, and then submitting such viscous solution to the action of a
dilute acid, sulphuric acid being preferred, and subsequently neutralizing the solu-
tion thus resulting so as to render it capable of being employed for the purposes of
brewing.
Third. The preparation or treatment of the water or liquor to be employed for
the purposes of brewing by firstly mixing these with an acid, by preference sul-
phuric acid, and subsequently neutralizing the same in the manner herein-before
described.
In witness whereof, I, the said Alfred Blake, have to this my Specification
set my hand and seal, this Seventeenth day of October One thousand eight
hundred and seventy-six.
ALFRED BLAKE. (L.S.)