IMPROVEMENT IN THE TREATMENT OF FATS FOR THE MANUFACTURE OF SOAP
Year: 1883

page_text: LETTERS PATENT to John Imray of No 23 Southampton Buildings Chancery
Lane in the County of Middlesex for an Invention of AN IMPROVEMENT IN
THE TREATMENT OF FATS FOR THE MANUFACTURE OF SOAP communicated to
him from abroad by Ivar Axel Ferdinand Bang and Jules de Castro both of
Paris France
PROVISIONAL SPECIFICATION left by the said John Imray at the Office
of the Commissioners of Patents on the 26th July 1883.
JOHN IMRAY of No. 28 Southampton Buildings Chancery Lane in the County of
Middlesex "AN IMPROVEMENT IN THE TREATMENT OF FATS FOR THE MANU-
FACTURE OF SOAP [communicated to him from abroad by Ivar Axel Ferdinand
Bang and Jules de Castro both of Paris France]
"
Fats are frequently subjected to the action of heated water with a little zinc
powder in a close vessel, for separation of the glycerine before saponification. The
fatty acids act on the metal of the vessel producing compounds which, mingled
with the fat, seriously discolour the soap produced from it. This invention relates
to means of preventing this discoloration. For this purpose, the fatty matter,
after being in the usual way for separation of the glycerine, is poured into a vessel
lined with lead, and, while still hot, it is treated with sulphurous acid applied either
in solution with water or blown through the material to which water is added. The
sulphurous acid acts on the metallic compounds, forming new compounds which
can be drained off with the water, and it also to a certain extent bleaches the
fatty matter, so that the soap produced from it is free from objectionable
discoloration.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Imray in the Great Seal Patent Office on the 9th November
1883.
JOHN IMRAY of N° 28 Southampton Buildings Chancery Lane in the County of
Middlesex "AN IMPROVEMENT IN THE TREATMENT OF FATS FOR THE MANU-
FACTURE OF SOAP" A communication to me from Abroad by Ivar Axel Ferdinand
Bang and Jules de Castro both of Paris France
Fats are frequently subjected to the action of heated water with a little zinc
powder in a close vessel, for separation of-the-glycerine-before saponification.. The
fatty acids act on the metal of the vessel producing compounds which, mingled
with the fat, seriously discolour the soap produced from it. This invention relates
to means of preventing this discoloration. For this purpose, the fatty matter,
after being treated in the usual way for separation of the glycerine, is poured into
a vessel lined with lead, and while still hot it is treated with sulphurous acid
applied either in solution with water, or blown through the material to which
water is added. The sulphurous acid acts on the metallic compounds, forming new
compounds which are soluble in water, and can bo-drained off with the water, and
it also to a certain extent bleaches the fatty matter, especially that which is of
vegetable origin, so that the soap produced from it is free from objectionable
discoloration.
Having thus described the nature of this invention and in what manner the
same is to be performed, as communicated to me by my foreign correspondents,
I-claim:
The treatment with sulphurous acid of fatty matters prepared for saponification,
substantially as and for the purpose herein set forth.
In Witness whereof I the said John Imray have hereunto set my hand and seal
this Ninth day of November in the year of our Lord One thousand eight hundred
and eighty-three.
TAUN IMRAV