Improvements in Disinfectants and Compounds for the Supply of Sulphur Dioxide, for other Purposes.
Year: 1888

page_text: Date of Application, 31st Oct., 1883
Complete Specification Left, 30th July, 1889-Accepted, 7th Sept., 1889
TRUVIDIONAL SPECIFICATION.
Improvements in Disinfectants and Compounds for the Supply of
Sulphur Dioxide, for other Purposes.
I, JAMES EMERSON REYNOLDS of 70 Morehampton Road, Dublin M.D., Professor
of Chemistry, do hereby declare the nature of this invention to be as follows :-
J
The use of the liquids which are formed when the varieties of "Camphors" are
exposed to the action of sulphur dioxide, for the solution of, or admixture with, other
solid or liquid disinfectants; and as sources of sulphur dioxide gas for disinfection and
other purposes.
Dated this 29th day of October 1888.
COMPLETE SPECIFICATION.
Improvements in Disinfectants and Compounds for the Supply of
Sulphur Dioxide for other Purposes.
1, JAMES EMERSON REYNOLDS M.D. F.R.S., of 70 Morehampton Road, Dublin,
Professor of Chemistry University of Dublin 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 :-
I find that the liquid which is known to be produced when sulphur dioxide gas is
brought in contact with "camphor" at ordinary temperature and pressure, is an
excellent solvent for various disinfectants, such as benzoic and salicylic acids, boracic
anhydride or mercuric chloride (though the solution of the latter soon changes): and
is easily miscible with oil of eucalyptus, nitrobenzene, phenols and ethers. I apply
the knowledge and these facts, which I have ascertained to the production of com-
pound liquids I have named "Thiocamf Disinfectants," which can be prepared and
preserved without pressure.
One mode by which I prepare the solvent is as follows:-
Several connected stoneware Woulfe's bottles of suitable capacity are filled with
lumps of any cheap "camphor," and a current of well cooled sulphur dioxide gas is
passed through the system until the camphor is wholly liquefied and the resulting
fluid is saturated with SO, at ordinary atmospheric temperature and pressure.
find that the liquid so obtained contains from 30 to 35 per cent. of its weight of SO,
according to the kind of camphor used in its production.
I prepare the disinfectant compounds by dissolving in the liquid, prepared as just
described, one or more of the disinfectants already named, in proportions suited to
the purpose for which the product is to be employed.
A solution which I find very effective and generally useful is made as follows:
To one gallon of the saturated compound of camphor with sulphur dioxide, I add a
mixture of 14 fluid ounces of crude oil of eucalyptus, one fluid ounce of nitrobenzole,
and one ounce by weight of benzoic acid (which latter is previously dissolved in three
times its weight of strong alcohol).
When any such compound is poured on a large dish or tray preferably placed
over a vessel containing hot water, large volumes of powerful disinfectant gases and
vapours are evolved, and the white residue left on evaporation, when diffused through
water containing some washing soda." is of value for use with soap for washing
floors and woodwork.
"

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I wish it to be known
that I am well aware that Festini has shown that sulphur dioxide which has been
first liquefied by pressure can dissolve various substances, including some disinfectants,
and that patents have been obtained for dissolving phenols, camphor, cresol, thymol,
menthol, terpenes, and the like, in liquid sulphur dioxide at high pressure, and the
use of these compounds as disinfectants, also for dissolving gaseous sulphur dioxide
in carbolic acid, and I make no claim for any of these ideas, but that what I
claim is :-
1. The manufacture of disinfectants, by exposing camphor to the action of sulphur
dioxide and dissolving in the solution thus obtained one or more of the following
benzoic or salicylic acids, horacic anhydride, mercuric chloride, oil of eucalyptus,
nitrobenzole, phenols, or ethers, whereby disinfectants are obtained which, at a gentle
heat, or by diffusion alone, give off quantities of powerfully disinfectant gases and
vapours.
2. A disinfectant consisting of the combination substantially as described, of
(a) a solution of camphor in sulphur dioxide.
(b) one or more of the other disinfecting substances set forth in Claim 1.
3. The use of the residue left after the disinfectant gases are given off as set forth
in Claim 1, as a disinfecting material, in conjunction with soap for washing floors,
woodwork, and the like.
Dated this 29th day of July 1889.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.