The Treatment of Certain Colouring Compounds or Materials for the Purpose of Rendering them Soluble or more Soluble and Suitable for Dyeing and Printing.
Year: 1886

page_text: Date of Application, 21st Oct., 1886.
Complete Left, 19th July, 1887.
Complete Accepted, 19th Aug., 1887.
RESERA
The Treatment of Certain Colouring Compounds or Materials for
the Purpose of Rendering them Soluble or more Soluble and
Suitable for Dyeing and Printing.
I, CARL AUGUST BENNERT, of Blaydon-on-Tyne, in the County of Durham,
Chemist, do hereby declare the nature of this Invention to be as follows:-
This Invention has for its object the rendering soluble or more soluble of the
colouring compounds or materials produced by reactions between the dioxide of
sulphur group and Amines of the Aromatic series as described in the Provisional
Specification of my Application of even date herewith and which are therein termed
Thiamines" and the rendering such products suitable for dyeing and printing.
(6
I have discovered that if certain of the Thiamines, for instance, the Thiamine
which is obtained by acting with one molecule of Sulphur dioxide on two Molecules
of Aniline be dissolved in Sulphuric Acid and heated in a Steam bath, they are
Sulphonated" and become soluble.
I have also discovered that if any one of the Thiamines instead of being treated
with Sulphuric Acid in a Steam bath, be at a lower temperature subjected to the
action of fuming Sulphuric Acid Sulphuric Chlorhydrate or of mixtures of Sodium-
anhydro-sulphate or meta-phosphoric acid with sulphuric Acid or of similar mixtures
capable of Sulphonating then such Thiamine becomes more or less Sulphonated and
soluble.
The products obtained according to my Invention may be then worked up in any
of the well known manners employed in the manufacture of coloring matters.
The Sulphonated Thiamines by treatment with Nitric acid are mostly transforined
into soluble brown colours of various shades.
Datad this 21st day of October 1886.

page_text: The Treatment of Certain Colouring Compounds or Materials for
the Purpose of Rendering them Soluble or more Soluble and
Suitable for Dyeing and Printing.
I CARL AUGUST BENNERT of Hebburn on Tyne in the County of Durham
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 has for its object rendering soluble or more soluble in water or
weak alkaline solutions the colouring compounds or materials obtained by the
processes described in the Specification of my application for Patent No. 13466 of
even date herewith and which are therein termed "Thiamines" so as to render the
said colouring compounds or materials suitable for dyeing and printing.
I have found that the Thiamines can be sulphonated and so rendered soluble or
more soluble in water or weak alkaline solutions by treatment with sulphonating
agents such as Sulphuric Acid or Sulphuric Acid containing Sulphurtrioxide or other
mixtures capable of sulphonating such as sulphuric acid with chlorhydrosulphuric
Acid or with meta-phosphoric Acid or with Anhydrosulphate of Sodium or with
compounds which are known to react similarly.
I designate the products obtained from the Thiamines by treatment with sulphonating
means "Thiaminesulphoacids.
The Thiaminesulphoacids are mostly colouring matters of various bluish shades
suitable for dyeing and printing.
The mode of performing my Invention will be clearly understood by the following
examples (the parts being by weight).
Example I. 5 parts of the product obtained by the process described under
example VII in the Specification of my Application for Patent No. 13,466 of even
date herewith are dissolved in 30 parts Sulphuric Acid and heated slowly in a Steam
bath up to 105° centigrade (221° F.) This temperature is maintained from 12 to
24 hours.
Example II 5 parts of the same product as used in Example I. are dissolved in
20 parts sulphuric Acid, containing 20 per cent. sulphurtrioxide and heated slowly up
to 60° centigrade (140° F.)
This temperature is maintained for about 12 hours.
Example III. Instead of using as in Example II. Sulphuric Acid containing 20 per
cent. Sulphurtrioxide, there may be used Sulphuric Acid which contains 30 to 40 per
cent. Sulphurtrioxide, and heated slowly up to 60° centigrade.-(140° F.)
This temperature is maintained for about 12 hours.
Example IV 5 parts of the same product as used in Example 1. are dissolved in
20 parts Sulphuric Acid, containing 20 per cent. chlorhydrosulphuric Acid, and heated
slowly up to 60° centigrade.-(140° F.)

page_text: This temperature is maintained for about 12 hours.
Example V. 5 parts of the same product as used in Example I are dissolved in
20 parts Sulphuric Acid containing 20 per cent. metaphosphoric Acid and heated slowly
up to 60° centigrade (140° F.)
This temperature is maintained for about 12 hours.
Example VI. 5 parts of the same product as used in example I are dissolved in
30 parts Sulphuric Acid and heated slowly up to 100° Centigrade (212° F). Then
20 parts powdered anhydrosulphate of Sodium are slowly added. The temperature
of 100° (212° F) is then still maintained for about 24 hours.
I have given the foregoing examples in order to clearly ascertain the nature of my
Invention and the manner in which the same may be performed without necessarily
limiting myself to the precise details given :-
These Examples will make it clear to Chemists how to treat the other Thiamines,
enabling them to judge which of the Sulphonating agents mentioned will be the best to
adopt and to select the proper times proportions and temperatures-In some cases the
new products obtained in the manner indicated may with advantage be treated by the
process described in the Specification of my Application for Patent dated 18th July
1887 No. 10046.
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 :-
First The manufacture and use of the compounds herein referred to and termed
by me "Thiaminesulphoacids" by causing the sulphonating agents above mentioned
to react upon the products obtained by the processes described in the Specification of
my Application for Patent No. 13,466 of even date herewith, and therein termed
"Thiamines."
Second-The new products herein before referred to and termed "Thiamine-
sulphoacids."