Improvements in the Treatment or Utilisation of Salt obtained from Spent Soap Lyes in the Recovery of Glycerine therefrom.
Year: 1890

page_text: Date of Application, 22nd Jan., 1890
Complete Specification Left, 16th Oct., 1890-Accepted, 6th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in the Treatment or Utilisation of Salt obtained
from Spent Soap Lyes in the Recovery of Glycerine therefrom.
We, CHARLES WHITEWAY HAZLEHURST and SAMUEL POPE, both of Runcorn, in
the County of Chester, Soap and Alkali Manufacturer, and Works Manager,
respectively, do hereby declare the nature of this invention to be as follows:-
Salt obtained from the soap lyes in the recovery of glycerine therefrom is unfit for
many uses by reason of the glycerine and other organic matter contained therein. It
is found to work very badly for making black ash and equally so for soap making
while great difficulty has been experienced in attempting to make refined salt from it.
Now we have found that by heating this salt to a heat sufficient to remove or
destroy the organic matter the salt is at once made useful for many purposes. For
making black ash indeed, it is absolutely better than ordinary salt as it contains a
valuable quantity of sulphate of soda and is of course desiccated. It can even be
dissolved in water and freed from its solid matter by filtration or settlement and then
re-evaporated for table or other use or if the heat and exposure of air have been
sufficiently great in the furnace all or nearly all trace of organic matter will have
been already taken away so that little or no filtration will be required. If the sulphate
of soda be injurious for the purpose for which the salt is to be applied we add to the
solution chloride of calcium and thus precipitate the sulphuric acid as sulphate of lime
leaving almost pure common salt.
In carrying out our invention we take the salt obtained in the recovery of glycerine
from spent soap lyes and roast it in any suitable furnace preferably with free
admission of air whereby the salt is dried and the organic impurities volatilised or
burnt off.
Dated this 21st day of January 1890
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in the Treatment or Utilisation of Salt obtained.
from Spent Soap Lyes in the Recovery of Glycerine therefrom.
We, CHARLES WHITEWAY HAZLEHURST and SAMUEL POPE, both of Runcorn in
the County of Chester, Soap and Alkali Manufacturer, and Works Manager,
respectively, 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 :-
Salt obtained from the soap lyes in the recovery of glycerine therefrom is unfit for
many uses by reason of the glycerine and other organic matter contained therein. It
is found to work very badly for making alkali and equally so for soap making,
while great difficulty has been experienced in attempting to make refined salt from it.
Now we have found that, by heating this salt to a temperature sufficient to remove
or destroy the glycerine and other organic matter, the salt is at once made useful for
many purposes. For making sulphate of soda indeed it is better than ordinary salt
as it contains a valuable quantity of sulphate of soda and, is, of course, desiccated.
It can even be dissolved in water, and freed from its solid matter by filtration or
settlement, and then re-evaporated and made into white salt.
In carrying out our invention, we take the salt obtained in the recovery of glycerine
from spent soap lyes, and roast it in any suitable furnace, preferably with free

page_text: admission of air, whereby the salt is dried, and the organic impurities volatilized or
burnt off.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is ;-
The improvement in the treatment or utilization of the salt obtained from spent
soap lyes in the recovery of glycerine therefrom which consists in calcining or heating
the same to a sufficient degree to burn off the volatile organic impurities, substantially
as described.
Dated this 15th day of October 1890.
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Nottingham, and London, Patent Agents.