Improvements in or relating to the Treatment of Brewers' and Distillers' Mash and the Saccharine Liquid or Wort Obtained therefrom.
Year: 1894

page_text: Date of Application, 1st June, 1894
'omplete Specification Left, 7th Dec., 1894--Accepted, 19th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Treatment of Brewers' and
Distillers' Mash and the Saccharine Liquid or Wort Obtained
therefrom.
We, ROBERT WHEELER PRESTON of 4 India Buildings, Water Street,
Liverpool and JOHN MELLRAY HOGARTH of 20 Pembroke Road, Bootle, both
in the County of Lancaster, Distillers, do hereby declare the nature of this
invention to be as follows:-
This invention relates to the treatment of brewers' or distillers' mash obtained
from vegetable products containing starch and the saccharine liquid or wort
obtained therefrom. It consists mainly in separating by suitable means the liquid
and solid ingredients of the mash into a perfectly clear wort. This wort is
fermented by yeast, and during the process of fermentation, purified air may be
blown into the wort, and, after fermentation is complete, the wort is removed and
the yeast allowed to separate, the liquid drained off and distilled for spirit, whilst
the solid ingredients separated from the mash can be used for cattle food.
In carrying our invention into effect, the plan we prefer is to form the mash tun
with a perforated false bottom, and separate the liquid and solid ingredients of the
mash in the ordinary way, with this difference however, that we leave the bulk of
the grains in the mash tun after each mashing, and pass the liquor which is drawn
off from the mash tun, through a filtering arrangement to remove all solid matter
from the wort. The grains left in the mash tun are of course subjected to a second
mixing, the liquor drawn off and filtered, and the operation repeated until the
complete exhaustion of the saccharine and amylaceous substances of the malt is
effected. The filtration of the liquor in the manner described gives a perfectly
clear wort, which is put with yeast into the fermenting vat and pure atmospheric
air admitted. This purified air may be produced by an apparatus in which air is
driven by a pump or fan into a vessel by means of a revolving pipe with perforated
arms at the bottom. The air is ejected through these perforated arms, rises through
the acidified water with which the vessel is partly filled, and from the upper part
of this vessel the partially purified air passes into a second vessel by means of a
similar revolving tube with perforated arms at the bottom and rises up in a finely
divided state through the acidified water from whence the purified air is discharged
by a pipe to the backs or coppers. The shafts may revolve at a speed of say
20 to 40 revolutions per minute, but the exact speed can of course be varied to suit
special circumstances.
1004
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to the Treatment of Brewers' and
Distillers' Mash and the Saccharine Liquid or Wort Obtained
therefrom.
We, ROBERT WHEELER PRESTON of 4 India Buildings, Water Street,
Liverpool and JOHN MELLRAY HOGARTH of 20 Pembroke Road, Bootle, both
in the County of Lancaster Distillers; 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 :-
This invention relates to the treatment of brewers' or distillers' mash obtained
from vegetable products containing starch and the saccharine liquor or wort
obtained therefrom. It consists mainly in separating by suitable means the liquid
and solid ingredients of the mash into a perfectly clear wort. This wort is
fermented by yeast, and during the process of fermentation, purified air may be
blown into the wort, and, after fermentation is complete, the wort is removed and
the yeast allowed to separate, the liquor drained off and distilled for spirit, whilst
the solid ingredients separated from the mash can be used for cattle food.
In carrying our invention into effect, the plan we prefer is to form the mash tun
with a perforated false bottom, and separate the liquid and solid ingredients of the
mash in the ordinary way, with this difference however, that we leave the bulk of
the grains in the mash tun after each mashing, and pass the liquor which is drawn
off from the mash tun, through a filtering arrangement to remove all solid matter
from the wort. The filtering arrangement employed is of no special construction,
any form of press commonly used for filter-pressing beer and yeast in breweries and
distilleries serving the purpose, such for instance as the filter presses of Johnson of
London. The grains left in the mash tun are of course subjected to a second
mixing, the liquor drawn off and filtered, and the operation repeated until the
complete exhaustion of the saccharine and amylaceous substances of the malt is
effected. The filtration of the liquor in the manner described gives a perfectly
clear wort, which is put with yeast into the fermenting vat and pure atmospheric
air admitted.
Our apparatus for producing purified air is set forth in the accompanying
drawing, in which
Figure 1 is an elevation and
Figure 2 a plan.
In these, A A are vats or tuns of wood saturated with paraffin wax or made of
other material proof against strong mineral acids; B central hollow shaft or tube
formed of glass, lead or lead-coated metal or other material, not acted ou by the
acid employed; C six arms perforated on the sides, top, bottom or any or all of
these; D D steps or bearings for the shaft; E space filled with acidulated water;
F space filled with purified air; G bevel gear for turning shaft B preferably 20 to
40 revolutions a minute; H a stuffing gland; I pipe leading from the air pump
to the first vessel; J pipe bringing the air (partially purified in the first chamber) to
the second chamber; K pipe leading the purified air to the wash backs. These
vessels are in our experimental apparatus about 6 feet high and 3 feet 6 inches
diameter, the acid can be commercial sulphuric acid or diluted with about half its
weight of water. Dilute hydrochloric or nitric acid could be substituted in cases
where this is found desirable.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. The improvement in the treatment of brewers' or distillers' mash and the wort

page_text: obtained therefrom, which consists in running off the wort from the grains, filtering
it and treating it with yeast, with or without purified air, treating the grains left in
the mash to a second mixing, and repeating the operation until sufficient exhaustion
of the saccharine and amylaceous material has taken place.
2. The apparatus for purifying air for use in treating brewers' and distillers' wort
substantially as described.
Dated this 6th day of Decemira
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Birmingham, and London,
Patent
Agents.