IMPROVEMENTS IN DISINFECTING COMPOUNDS
Year: 1882

page_text: LETTERS PATENT to Isaac Shimwell McDougall of the firm of McDougall
Brothers Manufacturing Chemists of Manchester and London for an
Invention of "IMPROVEMENTS IN DISINFECTING COMPOUNDS."
PROVISIONAL SPECIFICATION left by the said Isaac Shimwell McDougall
at the Office of the Commissioners of Patents on the 23rd December 1882.
ISAAC SHIMWELL MCDOUGALL of the firm of McDougall Brothers Manufacturing
Chemists of Manchester and London "IMPROVEMENTS IN
DISINFECTING
COMPOUNDS
"
Hitherto compounds containing crude Tar oils or crude Tar Acids or Carbolic
or Cresyllic Acids, have been used for disinfecting purposes, both in the solid and
liquid forms Thus Carbolates of Lime and Magnesia and other bases have been
used as solid disinfectants in the form of powders-And Carbolates of Soda and
Potash and other bases have been used as liquid disinfectants in the form of fluids
This Invention has for its object the production of disinfectants which shall be
solid, so as to have all the convenience and economy of a dry portable substance
capable of being used as a dry disinfectant in cases where a dry disinfectant is
desirable and yet soluble in water, so as to be applicable in the form of a fluid to
the matters to be disinfected, or soluble in liquid matters requiring to be disinfected
and wbich disinfectant shall also have when desirable detergent and fumigant
properties.
I accomplish this object by the addition of crude Tar oils, or crude Tar acids, or
Carbolic or Cresyllic Acids or their homolognes to soluble salts of the bases and not
to the bases themselves.
Thus I add the crude Tar oils or crude Tar Acids, or Carbolic or Cresyllic Acids
to the Carbonates or Muriates or Phosphates or Sulphates or Sulphites of Soda or
Potash or Magnesia or Alumina or all all or any of them. If I wish to make the
compound useful not only for disinfecting purposes but also for washing and
cleansing, I employ some Carbonate of Soda or Potash or if I wish to further

page_text: increase its disinfecting properties I employ salts containing Sulphurous Acid
when the compound becomes also available for fumigating purposes, as by the
addition of a suitable acid, Sulphurous Acid is given off
These salts can be produced in the form of solid substances and in this state,
either alone or mixed together, are suitable to hold and carry the necessary
quantities of the Tar products, and being soluble can form fluids which may be
used as disinfectants and detergents and fumigants.
These examples given are named as illustrations as other salts of bases are
suitable and may be employed for the same purposes.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Isaac Shimwell M°Dougall in the Great Seal Patent Office on the
21st June 1883.
.
ISAAC SHIMWELL M°DOUGALL of the firm of M'Dougall Brothers Manufacturing
Chemists of Manchester and London "IMPROVEMENTS IN
COMPOUNDS
"
DISINFECTING
Hitherto compounds containing crude Tar Oils or, crude Tar Acids or Carbolic
or Cresyllic Acids have been used for disinfecting purposes both in the solid and
liquid forms. Thus Carbolates of lime and Magnesia and other bases have been
used as solid disinfectants in the form of powders and Carbolates of Soda and
Potash and other bases have been used as liquid disinfectants in the form of fluids
This Invention has for its object the production of disinfectants which shall be
solid so as to have all the convenience and economy of a dry portable substance
capable of being used as a dry disinfectant in cases where a dry disinfectant is
desirable and yet soluble in water so as to be applicable in the form of a fluid to the
matters to be disinfected or soluble in liquid matters requiring to be disinfected
and which disinfectant shall also have when desirable detergent and fumigant
properties.
I accomplish this object by the addition of Crude Tar Oils or crude Tar acids or
Carbolic or Cresyllic Acids or their homologues to soluble salts of the bases and not
to the bases themselves.
Thus I add the crude Tar oils or crude Tar Acids or Carbolic or Cresyllic Acids
to the Carbonates or Muriates or Phosphates or Sulphates or Sulphites of Soda or
Potash or Magnesia or Alumina or all or any of them.
If I wish to make the compound useful not only for disinfecting purposes but
also for washing and cleansing I employ some Carbonate of Soda or Potash or if
I wish to further increase its disinfecting properties I employ salts containing
Sulphurous Acid when the compound becomes also available for fumigating
purposes as by the addition of a suitable acid, Sulphurous acid is given off.
These salts can be produced in the form of solid substances and in this state
either alone or mixed together are suitable to hold and carry the necessary

page_text: quantities of the Tar products and being soluble can form fluids which may be
used as disinfectants and detergents and fumigants.
These examples given are named as illustrations as other salts of bases are
suitable and may be employed for the same purposes.
Having now described and particularly ascertained the nature of my said
Invention and the manner in which the same is or may be used or carried into
effect I would observe in conclusion that what I consider to be novel and original
and therefore claim as the Invention secured to me by the herein before in part
recited Letters Patent is:
The production and use of the improved disinfecting compounds as and for the
purposes herein before described.
In witness whereof I the said Isaac Shimwell M°Dougall have to this my
Specification set my hand and seal this nineteenth day of June One
thousand eight hundred and eighty three
ISAAC SHIMWELL M'DOUGALL (L.S.)