A Process for Purifying Waste Distillery Liquors and Extracting therefrom Valuable Products.
Year: 1899

page_text: Date of Application, 27th Apr., 1899
Complete Specification Left, 26th Jan., 1900-Accepted, 3rd Mar., 1900
A Process for Purifying Waste Distillery Liquors and Extracting
therefrom Valuable Products.
I, WILLIAM STEVENS SQUIRE, of Clarendon House, 30, St. John's Wood Park,
London, N.W., Chemical Engineer, do hereby declare the nature of this invention
to be as follows:-
The waste liquors of a distillery consist of the steep and tun room waters, and
of spent wash or burnt ale.
The tun room water and the water resulting from steeping the barley for
the manufacture of malt I purify with manganate or permanganate of potassium
or sodium. The resulting binoxide of manganese is allowed to subside and the
purified liquor is run off.
in treating the spent wash or burnt ale I firstly neutralise it with lime, or
partly with carbonate of calcium and partly with caustic lime.
The resulting precipitate is separated by filtration, pressed and dried; this
precipitate containing as it does a considerable quantity of phosphates and nitro-
genous matter is an excellent manure. I then evaporate the clear liquid until
it has a specific gravity of 1150 or thereabouts.
I prefer to accomplish this in a triple effect apparatus, the hot distilled water
from which is admirably adapted for brewing purposes in a distillery.
On cooling the concentrated liquor a copious crystallisation of lactate of
calcium takes place; the crystals are separated, and after purification may be
used for the manufacture of lactic acid.
The mother liquors contain a considerable quantity of glycerine and a mixture
of various salts. In order to separate these I pass the liquor through a dialysing
apparatus.
Inder these circumstances the glycerine and salts mixed with some impurities
pass through the diaphragm. This glycerine may then be purified by distilla-
tion either in a current of superheated steam or in vacuo.
The liquor which has been freed from the glycerine and salts is evapourated to
a syrupy consistence and mixed with maize meal or other suitable material of
that nature, and baked. This forms a cake well suited for cattle food.
DI
r
1900
COMPLETE SPECIFICATION.
A Process for Purifying Waste Distillery Liquors and Extracting
therefrom Valuable Products.
I, WILLIAM STEVENS SQUIRE, of Clarendon House, 30, St. John's Wood Park,
London, N.W., Chemical Engineer, do hereby declare the nature of this invention
TD 077
A Process for Purifying Waste Distillery Liquors and Extracting
therefrom Valuable Products.
I, WILLIAM STEVENS SQUIRE, of Clarendon House, 30, St. John's Wood Park,
London, N.W., Chemical Engineer, do hereby declare the nature of this invention
TD 017

page_text: and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
--
The waste liquors of a distillery consist of the steep and tun room waters, and
of spent wash or burnt ale.
The tun room water and the water resulting from steeping the barley for
the manufacture of malt I purify with manganate or permanganate of potassium
or sodium. The resulting binoxide of manganese is allowed to subside and the
purified liquor is run off.
In treating the spent wash or burnt ale I firstly neutralise it with lime, or
partly with carbonate of calcium and partly with caustic lime.
The resulting precipitate is separated by filtration, pressed and dried; this
precipitate containing as it does a considerable quantity of phosphates and nitro-
genous matter is an excellent manure. I then evaporate the clear liquid until
it has a specific gravity of 1150 or thereabouts.
I prefer to accomplish this in a triple effect apparatus, the hot distilled water
from which is admirably adapted for brewing purposes, in a distillery.
On cooling the concentrated liquor a copious crystallisation of lactate of
calcium takes place; the crystals are separated, and after purification may be
used for the manufacture of lactic acid.
The mother liquors contain a considerable quantity of glycerine and a mixture
of various salts. In order to separate these I pass the liquor through a dialysing
apparatus.
Under these circumstances the glycerine and salts mixed with some impurities
pass through the diaphragm. This glycerine may then be purified by distilla-
tion either in a current of superheated steam or in vacuo.
The liquor which has been freed from the glycerine and salts is evaporated to
a syrupy consistence and mixed with maize meal or other suitable material of
that nature, and baked. This forms a cake well suited for cattle food.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. The purification of steep and tun room waters by means of manganate or
permanganate of potassium, or sodium.
2. The separation and partial purification of the glycerine by means of dialysis.
3. The combination of the processes for obtaining useful products from spent
wash substantially as described.
Dated this 25th day of January 1900