A New or Improved Method of Purifying and Hardening Water for Use in the Manufacture of Malt Extract, and for Brewing and analogous purposes.
Year: 1892

page_text: Date of Application, 14th May, 1892
Complete Specification Left, 14th Feb., 1893-Accepted, 13th May, 1893
PROVISIONAL SPECIFICATION.
A New or Improved Method of Purifying and Hardening Water for
Use in the Manufacture of Malt Extract, and for Brewing and
analogous purposes.
i
We, RICHARD GREENSHIELS Ross Engineer of Ravensleigh, Dowanhill
Gardens, JOSEPH BANKS HILLIARD, Surgical Instrument Maker of 65 Renfield
Street, and WILLIAM PATERSON, Manufacturing Chemist of Phoenix Works
Maryhill, all of Glasgow in the County of Lanark, North Britain, do hereby
declare the nature of this invention to be as follows:-
This invention relates to a new or improved method of purifying and hardening
water by impregnating it with carbonate or bi-carbonate of lime (calcium
bi-carbonate) and sulphate of lime (calcium sulphate), either combined or
separately and in any suitable proportions, for use in the manufacture of malt
extract, maltose, grape sugar, glucose, brewing ale or stout, malt vinegar, and
the like.
In the carrying out of our invention we take any suitable quantity of water,
preferably such water as is thoroughly suitable for domestic purposes and we add
a suitable quantity of caustic lime (calcium oxide) and of lime chloride (calx
chlorata) or of a mixture of the above. For ordinary purposes we use about
17 or 18 grains of the above mixture per gallon of water, or more or less of the
caustic lime or of the mixture of caustic lime and lime chloride (for convenience to
be hereinafter called limes), and we also use a suitable quantity of caustic alkali
according to the state of purity of the water to be used and according to the
particular purpose for which the water is required. We then agitate the mixture
of water and limes until the lime is entirely or partly dissolved.
To the mixture of the water and lime, we now add sufficient sulphuric acid to
neutralize about 11 to 13 grains of the lime and we again agitate the mixture.
To the mixture of water and lime which now contains sulphate of lime in solution
(solution of calcium sulphate) we now cause to pass a stream of carbonic acid
gas (carbonic anhydride), through, over or under the mixture until all the
remaining caustic lime is neutralized and dissolved or partly dissolved in the
mixture of water and lime.
The water containing the solution or combined solutions of carbonate or
bi-carbonate of lime and sulphate of lime is now filtered or allowed to settle until
clear for further use.
JOHNSONS,
115, St. Vincent Street, Glasgow, Petitioners' Agents.
COMPLETE SPECIFICATION.
A New or Improved Method of Purifying and Hardening Water for
Use in the Manufacture of Malt Extract, and for Brewing and
analogous purposes.
We, RICHARD GREENSHIELS Ross Engineer of Ravensleigh, Dowanhill
Gardens, JOSEPH BANKS HILLIARD, Surgical Instrument Maker of 65 Renfield
Street, and WILLIAM PATERSON, Manufacturing Chemist of Phoenix Works
Maryhill, all of Glasgow in the County of Lanark, North Britain, do hereby
declare the nature of this invention and in what manner the same is to be

page_text: performed, to be particularly described and ascertained in and by the following
statement :-
This invention relates to a new or improved method of purifying and hardening
water by impregnating it with carbonate or bi-carbonate of lime (calcium
bi-carbonate) and sulphate of lime (calcium sulphate), either combined or
separately and in any suitable proportions, for use in the manufacture of malt
extract, maltose, grape sugar, glucose, brewing ale or stout, malt. vinegar, and
the like.
-
In the carrying out of our invention we take any suitable quantity of water,
preferably such water as is thoroughly suitable for domestic purposes and we add
a suitable quantity of caustic lime (calcium oxide) and we may if desired, use a
suitable quantity of lime chloride (calx chlorata) or of a mixture of the above, or
a mixture of caustic alkalies.
For ordinary purposes we use a saturated solution of the above named caustic
lime or the caustic lime and lime chloride and we may also use a suitable quantity
of caustic alkali according to the state of purity of the water to be used and
according to the particular purposes for which the water is required.
The mixture of caustic lime we prefer to use is generally about 17 grains or
thereby of caustic lime to the gallon of water. We then agitate the mixture and
lime until the lime is entirely or partly dissolved, and we then filter the solution
from all insoluble matter or allow the insoluble matter to settle and draw the clear
liquor off.
To the mixture of the filtered water and lime, we now add sufficient sulphuric
acid to neutralize about 11 to 13 grains or thereby of the lime and we again agitate
the mixture.
To the mixture of water and lime which now contains sulphate of lime in solution
(solution of calcium sulphate) we now cause to pass a stream of carbonic acid gas
(carbonic anhydride) through, over or under the mixture until all the remaining
caustic lime is neutralized and dissolved or partly dissolved in the mixture of water
and lime, or alternately after the caustic lime has been neutralized with the carbonic
acid sufficient sulphuric acid can be added to neutralize about or thereby of the
bi-carbonate or carbonate of lime present.
The water containing the solution or combined solutions of carbonate or
bi-carbonate of lime and sulphate of lime is now filtered or allowed to settle until
clear for further use.
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 :-
The process for purifying and hardening water for use in the manufacture of
malt extract and for brewing and analogous purposes as described.
Dated this 19th Jan of L
1800
JOHNSONS,
115, St. Vincent Street, Glasgow, Applicants' Agents.