An Improved Detergent, applicable also for Preventing Incrustation in Boilers, for Preventing Rust and for similar purposes.
Year: 1898

page_text: Date of Application, 26th Feb., 1898-Accepted, 7th May, 1898
An Improved Detergent, applicable also for Preventing Incrustation
in Boilers, for Preventing Rust and for similar purposes.
I, EDMUND JAMES MILLS, D. Sc., F.R.S., of 60, John Street, in the County of
the City of Glasgow, North Britain, Professor of Technical Chemistry, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:-
Most detergents are substances or mixtures of a more or less alkaline nature,
and are intended to act in a watery menstruum. Various ingredients have from
time to time been added for the purpose of causing these detergents to act more
efficiently on resinous, greasy or tarry matters, whose removal from a given surface
may be desired, but as far as my knowledge extends, nothing at the same time
efficient and cheap has been suggested for this purpose.
My invention has reference chiefly to a coarse detergent of great strength in
the concentrated form, but capable of dilution for various purposes where a more
delicate result is desirable.
I take caustic soda, or caustic potash, or mixtures thereof; slaked lime; water;
and resiu oil; in such proportions as to constitute at first a thick paste, which may
either be used as such or in a state of admixture with more water, or watery liquid.
The following proportions answer well: Caustic soda 24 parts; caustic potash,
8 parts; slaked lime, 36 parts; resin oil, parts; water, 20 parts. Other pro-
portions may be used; and it must be distinctly understood that I do not limit
myself to those above given. The paste is preferably made by dissolving the caustic
alkali in the water, stirring in the slaked lime, and then adding the resin oil.
In order to use this paste for ordinary cleansing purposes, a little of it is thoroughly
mixed with a small quantity of water; this mixture is stirred into a larger
quantity, and in that condition applied with friction by means of a cloth or
brush. Other obvious methods may be had recourse to. For the prevention of
boiler scale or boiler corrosion, a little of the paste is diluted and put into the
boiler, the exact quantity being found as usual by trial.
When it is desired to remove paint, resin, grease, tar, or varnish from a given
surface, the paste is preferably spread thereon in a thin layer, and occasionally
worked about with a steel wire brush, until the surface begins to appear. A rinse
with water completes the removal. When applied in a thin layer the paste is also
valuable as an anti-rust.
my
said
Having now particularly described and ascertained the nature of
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. The preparation of a cheap and efficient detergent mixture consisting of
slaked lime, caustic alkali, water, and rosin oil.
2. The application of the said detergent either in the dilute or concentrated

page_text: state as may be required, for the purpose of cleaning or removing fresh or old
grease, paint, resin, varnish, tar, or other like matters from various surfaces.
3. The application of the said detergent to the prevention, by admixture with
the water supply of boilers, of the formation of coherent boiler scale, or of any
corrosion, all substantially as above described.
Dated this 25th day of February 1898.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Patent Agents.