Improvements in the Manufacture of Solutions of Hypochlorites of Alkalies.
Year: 1898

page_text: Date of Application, 8th Dec., 1898
Complete Specification Left, 19th Aug., 1899-Accepted, 23rd Sept., 1899
PROVISIONAL DI PULTIVATION
Improvements in the Manufacture of Solutions of Hypochlorites
of Alkalies.
We, EDWARD SHRAPNELL SMITH, Chemist, and THE UNITED ALKALI COMPANY
LIMITED, both of 30, James Street, Liverpool, in the County of Lancaster, do
hereby declare the nature of this invention to be as follows:-
In the manufacture of hypochlorite of soda, as hitherto conducted, chloride
of lime and saltcake, or chloride of lime and carbonate of soda, are allowed to
react in solution with the production of hypochlorite of soda, which remains
in solution and an insoluble salt of calcium, which is deposited. The clear
solution is then decanted from the calcium deposit, and usually does not exceed
per cent. by weight of available chlorine.
7
The object of this invention is to manufacture solutions of hypochlorites of
alkalies of higher strength of available chlorine than hitherto from chloride
of lime and any soluble salt of an alkali which will produce an insoluble salt
of calcium.
According to this invention chloride of lime and a soluble salt of an alkali
are allowed to react and when the reaction is complete, the liquid is decanted
and further chloride of lime and soluble salt of an alkali are added (either
simultaneously, or separately,) to the clear liquor; a further reaction then
takes place and, on settling, a solution of the hypochlorite of the alkali is pro-
duced of greater strength than is obtainable by the process of manufacture as
hitherto conducted. The aforesaid operation can be repeated according to the
strength of liquor required.
"
בד
1000
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.
Improvements in the Manufacture of Solutions of Hypochlorites
of Alkalies.
We, EDWARD SHRAPNELL SMITH, Chemist, and THE UNITED ALKALI COMPANY
LIMITED, both of 30, James Street, Liverpool, in the County of Lancaster, 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:
In the manufacture of hypochlorite of soda as hitherto conducted, chloride

page_text: of lime and saltcake, or chloride of lime and carbonate of soda, are allowed to
react in solution with the production of hypochlorite of soda, which remains
in solution, and an insoluble salt of calcium, which is deposited. The clear
solution is then decanted from the calcium deposit, and usually does not exceed
7 per cent. by weight of available chlorine.
The object of this invention is to manufacture solutions of hypochlorites of
alkalies of higher strength of available chlorine than hitherto, from chloride
of lime and any soluble salt of an alkali which will produce an insoluble salt
of calcium.
According to this invention chloride of lime and a soluble salt of an alkali
are allowed to react, and when the reaction is complete, the liquid is decanted
and further chloride of lime and soluble salt of an alkali, are added (either
simultaneously or separately) to the clear liquor; a further reaction then
takes place and, on settling, a solution of the. hypochlorite of the alkali is pro-
duced of greater strength than is obtainable by the process of manufacture as
hitherto conducted. The aforesaid operation can be repeated according to the
strength of liquor required.
.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what
we claim is:-
The manufacture of solutions of hypochlorites of alkalies of high strength
of available chlorine as herein before described.
Doted thi