Improvements in Colouring Matters.
Year: 1895

page_text: Date of Application, 27th June, 1890
Complete Specification Left, 24th Feb., 1896-Accepted, 28th Mar., 1896
PROVISIONAL SPECIFICATION.
Improvements in Colouring Matters.
We, BROOKE, SIMPSON AND SPILLER, LIMITED, Aniline Dye Manufacturers,
and WILLIAM SELBY SIMPSON, F.I.C., F.C.S., Chemist to the said Brooke,
Simpson and Spiller, Limited, both of Atlas Works, Hackney Wick, in the County
of Middlesex, do hereby declare the nature of this invention to be as follows:-
Our invention relates to the preparation of the yellow dye-stuff, or colouring
matter, first introduced into commerce by the aforesaid Brooke, Simpson and
Spiller, Limited, and known commercially as Primuline," by some manufacturers
called "Carnotine," Polychromine," Thiochromogen," "Aareoline" and "Sul-
phine," and the objects of our invention are to effect improvements in the process
for its production, which will materially reduce the cost of manufacture, and also
produce the colouring matter in a novel form.
$6
According to the process at present employed in preparing this colouring matter,
primuline base is treated with sulphuric acid and sulphuric anhydride, which
results in the production of primuline sulphonic acid, which is insoluble in water.
The primuline sulphonic acid is then boiled with a solution of sodium carbonate
(or other suitable alkali) which converts it into a solution of the sodium salt of
the sulphonic acid. This solution is evaporated to dryness, and the sodium salt
obtained is ground to a fine powder, and constitutes ordinary primuline, which is
readily soluble in water.
Now in this process, the boiling of the primuline sulphonic acid with an alkaline
solution for the purpose of obtaining a soluble product, and the subsequent
evaporation of a large body of water, necessarily consume a considerable amount
of fuel, time and labour, most of which is saved by means of our present
invention.
According to our new process we take the primuline sulphonic acid, which is an
insoluble sandy precipitate, wash it to remove any traces of free sulphuric acid,
and then dry it in a hydro-extractor, stove, drying room, or by other suitable
means.
We then add to it a definite proportion of sodium carbonate, or other suitable
alkali in a dry state, and finally grind the whole to an impalpable powder; the
primuline sulphonic acid and the alkali becoming, by such grinding process,
thoroughly mixed and incorporated together. The proportion of alkali thus
ground up and mixed with the sulphonic acid is such, that when the mixture is
placed in the dye bath, the insoluble primuline sulphonic acid is immediately
transformed into the soluble alkaline salt, known as "Primuline," and the dyeing
action is the same as when ordinary primuline is used.
By this means we dispense with the conversion of the sulphonic acid into a
soluble alkaline salt, this action taking place in the dye bath, or if the dyer prefers
to dissolve separately, then in the vessel used for such separate solution.
The substance produced by our invention is not what is known commercially as
"Primuline," and is readily distinguishable therefrom, both by chemical and optical.
tests, but it becomes converted into primuline when dissolved.
In some cases we may, after drying the aforesaid sandy precipitate, grind it into
powder without the admixture of any alkali, the proper proportion of such alkali.
being added in the dye bath, or in a separate vessel, or in any other convenient':
way by the dyer, or other person using the same..
$

page_text: Our invention consists essentially, in the substitution for ordinary primuline, of
primuline sulphonic acid, either mixed with the alkali necessary to render it
soluble, or in such a state, either wet or dry, that it is readily mixed with the
requisite alkali by the user, or can be added to an alkaline solution, or be suspended
in water, and an alkali, either solid or in solution, added thereto; or in any other
way well known to chemists, be brought into the requisite condition, viz.: alkaline
solution, for its dyeing powers to become available, as they are when converted
into the substance commercially known as Primuline.
All the proposals herein contained and described as relating to dyeing, are also
applicable to the use of the new preparation for printing purposes, subject to the
necessary conditions as to strength, admixture with thickening substances &c.
•
Our new article of manufacture being converted into primuline by the addition of
water in the case of its previous mixture with an alkali, or where not so mixed, then
by the addition of an alkali and water, or of water and an alkali.
Dated this 27th day of June 1895.
AMBROSE MYALL,
2 Lancaster Place, London, W.C., Agent for the Applicants.
We, BROOKE, SIMPSON AND SPILLER, LIMITED, Aniline Dye Manufacturers,
and WILLIAM SELBY SIMPSON, F.I.C., F.C.S., Chemist to the said Brooke,
Simpson and Spiller, Limited, both of Atlas Works, Hackney Wick, in the County
of Middlesex, 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 :-
66
Our invention relates to the preparation of the yellow dye-stuff, or colouring
matter, first introduced into commerce by the aforesaid Brooke, Simpson and
Spiller, Limited, and known commercially as Primuline," but by some manu-
facturers called "
9966
Carnotine," "Polychromine," "Thiochromogen,' Aereoline,"
and "Sulphine," and the objects of our invention are to effect improvements in the
process, for its production, which will reduce the cost of manufacture, and also
produce the colouring matter in a novel form.
According to the process at present employed in preparing this colouring
matter, primuline base is treated with sulphuric acid and sulphuric anhydride,
which results in the production of primuline sulphonic acid, which is insoluble iu
water. The primuline sulphonic acid is then boiled with a solution of sodium
carbonate, which converts it. into a solution of the sodium salt of the sulphonic
acid. This solution is evaporated to dryness, and the sodium salt obtained, is
ground to a fine powder, and constitutes ordinary "primuline," which is readily
soluble in water.
Now, in this process, the boiling of the primuline sulphonic acid with an alkaline
solution for the purpose of obtaining a soluble product, and the subsequent
evaporation of a large body of water, necessarily consume fuel, time and labour,
some of which can be saved by means of our present invention.
According to our new process, we take the primuline sulphonic acid, which is an
insoluble sandy precipitate, wash it to remove any traces of free sulphuric acid, and
dry it in a hydro-extractor, stove, drying-room or by other suitable means.
We then add to it a definite proportion of sodium carbonate, or other suitable
alkali in a dry state, and finally grind the whole to an impalpable powder; the
primuline sulphonic acid and the alkali becoming by such grinding process
thoroughly mixed and incorporated together. The proportion of alkali thus
ground up and mixed with the sulphonic acid is such, that when, the mixture.is
:

page_text: placed in the dye bath, the insoluble primuline sulphonic acid is transformed into
the soluble alkaline salt known as Primuline, and the dyeing action is the same as.
when ordinary primuline is used.
By this means we dispense with the conversion of the sulphonic acid into a
soluble alkaline salt, this action taking place in the dye bath, or if the dyer prefers.
to dissolve separately, then in the vessel used for such separate solution.
The substance produced by our invention, is not what is known commercially as
"Primuline," and is readily distinguishable therefrom, both by chemical and optical
tests, but it becomes converted into primuline when dissolved.
In some cases we may, after drying the aforesaid sandy precipitate, grind it into
powder without the admixture of any alkali, the proper proportion of such alkali
being added in the dye bath, or in a separate vessel, or in any other convenient way
by the dyer, or other person using the same.
Our invention consists essentially in the substitution for ordinary primuline, of
primuline sulphonic acid, either mixed with the alkali necessary to render it soluble,
or in such a state, either wet or dry, that it is readily mixed with the requisite
alkali by the user, or can be added to an alkaline solution, or be suspended in water.
and au alkali, either solid, or in solution be added thereto; or in any other way,
well known to chemists, be brought into the requisite coudition, viz. alkaline
solution, for its drying powers to become available, as they are when converted into
the substance commercially known as "Primuline."
All the proposals herein contained and described, as relating to dyeing, are also
applicable to the use of the new preparation for printing purposes, subject to the
necessary conditions as to strength, admixture with thickening substances, &c., our new
article of manufacture being converted into primuline by the addition of water, in
the case of its previous mixture with an alkali, or where not so mixed, then by the
addition of an alkali and water, or of water and an alkali.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim, is :-
1. In the production of primuline, the herein described process of washing and
drying primuline sulphonic acid, substantially as and for the purpose herein set
forth.
2. In the production of primuline, the herein described process of washing,
drying and grinding primuline sulphonic acid, substantially as and for the purpose
herein set forth.
3. In the production of primuline, the herein described process of washing and
drying primuline sulphonic acid and grinding the same with sodium carbonate, or
other suitable alkali, substantially as and for the purpose herein set forth.
4. In the production of primuline, the herein described process of washing and
drying primuline sulphonic acid and the combination therewith of sodium car-
bonate, or other suitable alkali, substantially as and for the purpose herein set
forth.
5. As a new article of manufacture, washed and dried primuline sulphonic acid,
prepared substantially as and for the purpose herein set forth.
6. As a new article of manufacture, a mixture, consisting of washed and dried
primuline sulphonic acid ground with sodium carbonate, or other suitable alkali,
and prepared substantially as and for the purpose herein set forth.
Dated this 24th day of February 1896.
AMBROSE MYALL,
2 Lancaster Place, London, W.C., Agent for the Applicants.