An Improved Detergent or Washing Powder:
Year: 1895

page_text: Date of Application, 18th Feb., 1895
Complete Specification Left, 2nd Nov., 1895-Accepted, 4th Jan., 1896
PROVISIONAL SPECIFICATION.
An Improved Detergent or Washing Powder:
I, JOHN Tпом AINSLIE WALKER, Analytical Chemist, of The Laboratory,
Rishton, car Blackburn, in the County of Lancashire, do hereby declare the
nature of this invention to be as follows:-
The object of this invention is to provide a harmless, yet active preparation of
ammonia for laundry use. This I accomplish by mixing a salt of ammonium with
bicarbonate, of soda, in the proportion of one molecule of the former to two mole-
cules of the latter. To avoid loss of ammonia I prefer to mix these salts in the
anhydrous condition, or to coat the ammonium salt with a substance that will
liberate the salt only in the presence of hot water. This preparation may be used
alone, or with a superfatted-soap base; in the latter case I introduce 10% of the
ammonium salt. The novelty which I claim in the above preparation is the use of
bicarbonate of soda, whereby the acid carbonate of ammonia is produced and all
risk of injury to the hands avoided. If artificial perfume be desired, a trace of
nitrobenzol may be added.
Dated this 16th day of February 1895.
JOHN THOM AINSLIE WALKER.
An Improved Detergent or washing Powder.
I, JOHN THOM AINSLIE WALKER, of The Laboratory, Rishton, near
Blackburn, in the County of Lancaster, Analytical Chemist, 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 relates to improvements in the manufacture of detergents .or
washing powders commonly known as dry soap, the object being to produce a
harmless yet active preparation of ammonia suitable for laundry purposes, and
which is accomplished by combining a salt of ammonium with industrial bicar-
bonate of soda, and if desired, by adding thereto an artificial perfume.
Such being the nature and object of my said invention, the following is a
complete description of same.
According to this invention, I employ a salt of ammonium and bi-carbonate of
soda, mixed in about the following proportions:-One molecule of a salt of
ammonium, preferably ammonium sulphate, to two molecules of industrial bi-car-
bonate of soda, and in order to avoid loss of ammonia, I prefer to mix the salts in
an anhydrous condition, or to coat the ammonium salt in the ordinary, and well
known manner with a substance such as paraffin wax, or solid paraffin, so that the
ammonia will only be liberated when the dry soap or powder is used with hot
water.
The above described preparation may be used alone, or with a super-fatted soap
base; in the latter case I introduce 10 per cent. of the detergent powder to the
soap base. By the use of the industrial bi-carbonate of soda, acid carbonate of
ammonia is produced, and all risk of injury to the hands is obviated.

page_text: If an artificial perfume is desired, it may be obtained by adding a trace of
nitrobenzol.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
(1.) In the manufacture of detergent or washing powders, the use of industrial
bi-carbonate of soda and a salt of ammonium, as and for the purpose herein
described.
(2.) In the manufacture of detergent or washing powders, the use of industrial
bi-carbonate of soda and a salt of ammonium combined with a base of super-fatted
soap, as and for the purpose herein described.
Dated this 1st day of November 1895.
JOHN THOM AINSLIE WALKER,
By his Agents, Brierley & Howard,
Penny Bank Chambers, Halifax.