AN IMPROVED PROCESS OR METHOD OF MANUFACTURING SOAP
Year: 1882

page_text: "
LETTERS PATENT to George Payne, of Millwall, in the County of Middlesex,
Chemical Manufacturer, for an Invention of AN IMPROVED PROCESS OR
METHOD OF MANUFACTURING SOAP."
PROVISIONAL SPECIFICATION left by the said George Payne at the Office
of the Commissioners of Patents on the 3rd January 1882.
GEORGE PAYNE of Millwall in the County of Middlesex, Chemical Manufacturer.
"AN IMPROVED PROCESS OR METHOD OF MANUFACTURING SOAP."
This Invention relates to an improved process or method of manufacturing
soap.
For this purpose I take any suitable oily or fatty matter and subject the same
under pressure in an autoclave to treatment with lime and water.
After the decomposition of the oily or fatty matter in the autoclave I withdraw
the aqueous solution of glycerine from the same and instead of decomposing the
lime soap with acids as in the well known process of making stearine, I employ for
its decomposition hydrate of soda or of potash, or soluble salts of either of these
substances thereby forming either soda-soap or potash-soap and precipitating the
lime in a more or less insoluble condition. The soda or potash soap obtained by
my improved process may be finished in a soap-copper in the ordinary manner.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Payne in the Great Seal Patent Office on the 1st July 1882.
GEORGE PAYNE, of Millwall, in the County of Middlesex, Chemical Manufacturer.
"AN IMPROVED PROCESS OR METHOD OF MANUFACTURING SOAP."
This Invention relates to an improved process or method of manufacturing
soap.
For this purpose I take any suitable oily or fatty matter and subject the same,
under pressure in an autoclave, to treatment with lime and water.
After the decomposition of the oily or fatty matter in the autoclave I withdraw
the aqueous solution of glycerine from the same and instead of decomposing the
lime soap with acids as in the well known process of making stearine, I employ for
its decomposition hydrate of soda or of potash (such as the strong caustic lyes used
by soap boilers) or a solution of carbonate of soda or of potash. The hydrate or
carbonate solution is used in about the proportion of seven (7) per cent of the
alkaline base to from sixty (60) or seventy (70) per cent of the fatty acid. These
proportions may be varied within certain limits, but in all cases care must be
taken that the alkali shall be sufficient to combine with or saturate the whole of
the fatty acid. The decomposition of the lime soap by means of the hydrate or
carbonate of soda will result in the production of soda soap, and, when the hydrate
or carbonate of potash is used for such decomposition the product will be potash
soap, the lime in either case being precipitated in a more or less insoluble condition.
The soda or potash soap obtained by my improved process may be finished in a
soap-copper in the ordinary manner.
Having thus fully described my said Invention and the manner of performing
the same I wish it understood that I do not claim as my Invention the preliminary
treatment of oily or fatty matter in an autoclave for obtaining the lime-soap as
above described but I claim,
The improved process or method of manufacturing soap, wherein lime-soap is
treated with a solution of hydrate or carbonate of soda or of potash, substantially
as, and for the purpose, set forth.
In witness whereof I the said George Payne have hereunto set my hand
and seal this First day of July in the year of our Lord One thousand
eight hundred and eighty two.
GEO. PAYNE. (L.S.)