An Improved Process for the Purification of Spent Lyes.
Year: 1896

page_text: Date of Application, 21st July, 1896
PROVISIONAL SPECIFICATION.
An Improved Process for the Purification of Spent Lyes.
We, CECIL HAROLD SIMPSON, of Calder Soap Works, Soap Manufacturer, and
FRANCIS HENRICK TIELKE ALLAN, of Portobello House, Analytical Chemist,
both of Wakefield, in the County of York, do hereby declare the nature of this
invention to be as follows:-
This invention has for its object an improved electrical process for the purification
of spent lyes to be used in the manufacture of pure glycerine.
Before treating the spent lyes with electricity in accordance with this invention
we preferably neutralize the alkali by mineral acid in the usual manner or by
fat acid though this is not essential to the carrying out of the process. In
order to facilitate the perfect neutralization of the alkali we pass the lyes
through a centrifugal apparatus or other mechanical mixing device or we force air
through the lyes and so agitate them and effect the perfect mixture of the acid
and alkali.
We then according to our invention pass a current of electricity through the lyes
using an iron anode and a cathode of iron or other substance. The strength of
current employed is preferably not less than 2 volts although a weaker current
may be sometimes used. By this treatment the lower and less stable compounds of
sulphur and oxygen are oxidized to the higher and more stable forms and the arsenic
and the various organic impurities that may be present in the lyes are precipitated.
The result is a very pure form of lyes suitable for concentration and distillation
for the manufacture of pure glycerine.
Duted this 21st day of Iul 1906
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants.
An Improved Process for the Purification of Spent Lyes.
We, CECIL HAROLD SIMPSON, of Calder Soap Works, Soap Manufacturer, and
FRANCIS HENRICK TIELKE ALLAN, of Portobello House, Analytical Chemist,
both of Wakefield, in the County of York, 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:-
This invention has for its object an improved electrical process for the purification
of spent lyes to be used in the manufacture of pure glycerine.
According to our invention we pass a current of electricity through the lyes
using an iron anode and an iron cathode, or an iron anode and a cathode of
some other suitable conductor. The strength of current employed is preferably
not less than 2 volts although a weaker current may be sometimes used. By this
Price 8d 1

page_text: treatment the lower and less stable compounds of sulphur aud oxygen are oxidized
to the higher and more stable forms and the arsenic and the various organic
impurities that may be present in the lyes are precipitated. The result is a very
pure form of lyes suitable for concentration and distillation for the manufacture of
pure glycerine.
Before treating the spent lyes with electricity as above described we prefer
to neutralize the alkali either by mineral acid in the usual manner or by a
fatty acid, the perfect neutralization being accelerated by passing the mixture
of lyes and acid through a centrifugal apparatus or other mechanical mixing
device or by forcing air through the lyes and acid and so agitating the same
as to effect the perfect mixture of the acid and alkali. Such neutralization
is not essential to the carrying out of our improved process and is sometimes
omitted.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
The treatment of spent lyes with electricity substantially as herein described and
for the purpose specified either with or without the preliminary neutralization of
the lyes as set forth.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, W.C., Agents for the Applicants.