and Employment of the same in Dyeing and Printing.
Year: 1888

page_text: and Employment of the same in Dyeing and Printing.
"
I, JULIUS HAUFF, of Feuerbach-by-Stuttgart, in the Empire of Germany, Chemical
Manufacturer, 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 same manner, as the sulpho-cyanic acid, hydro-chloric and nitric acid form
several basic soluble aluminium salts up to compound Al, Cl, (OH), respectively,
Al (NO), (OH)
According to reports from "The Technolog. Gewerbe. Museums in Vienna, sections
for dyeing, etc., No. 1 Page 18, etc. Liechti & Suidda arrived only in this as well as
by sulpho-cyanic acid at compounds of Formula Al, Cl, (OH), respectively Al,
(NO), (OH).
The formation of the lower basic compounds may take place by double action on
each other of basic aluminium sulphate with Ba Cl, respectively Ba (NO), or by
dissolving ordinary aluminium hydroxide in Al, Cl, respectively Al, (NO), or H Cl
respectively H NO..
In this manner the compounds Al, CI, (OH), respectively Al, (NO₂), (OH) may
also be obtained.
The higher basic compounds can be only obtained by dissolving aluminium hydrate
or H NO, also
free of any sulphuric acid in Al, Cl, or H Cl respectively Al, respectively Al,
free from any sulphuric acid, or through neutralization of pure.
(NO), by means of Alkali.
The method of producing basic aluminium chloride and nitrate is as follows :— .
1st. Aluminium hydrate washed carefully and obtained through precipitation of
aluminium salts with Alkali, is warmed with neutral aluminium chloride, respectively,
nitrate.
If Al, (OH), is free of sulphuric acid a compound will be produced thereby, which
contains to 8 equivalents Al, (OH), 1 equivalent acid, viz., the 8 times basic salt,
otherwise it is only possible to obtain a five times basic salt in this manner.
ינן.D

page_text: For instance if it is desired to produce the four times basic Al, Cl. (OH)₁₂, the
aluminium hydrate which is obtained from 100 kilos commercial aluminium sulphate
through precipitation with soda, is mixed with 50 kilos aluminium chloride in solution
20° B strong and such mixture then warmed.
Through further condensing of the solution received, the same may be concentrated
at will and ultimately the dry salt will be obtained.
2nd. Carefully washed aluminium hydrate is mixed with hydro chloric or nitric
acid in calculated weight proportion, as may be desired to obtain higher or lower basic
salts. Also in this case, the remark made before applies, viz. that very high basic
salts can only be obtained when aluminium bydrate free of sulphuric acid, is used.
3rd. Pure aluminium hydrate is mixed with such an amount of aluminium sulphate,
that the amount of sulphuric acid is in the desired proportion to the aluminium hydrate,
or to start from aluminium hydrate containing sulphuric acid the sulphuric acid is
estimated and if required as much aluminium sulphate is added, as will produce the
desired basic aluminium sulphate. To the latter is then added the barium chloride or
barium nitrate in amount corresponding with the sulphuric acid, whereby Barium
sulphate is precipitated, and basic aluminium chloride, respectively aluminium nitrate,
in solution, is obtained."
4. Neutral aluminium chloride or aluminium nitrate is mixed with soda or another
alkali and the mixture warmed.
Through the various quantities of the soda, salts of various bases are obtained.
100 K. of 20° Bé. strong aluminium chloride solution (for instance) with 20 k. soda,
gives the four times basic salt Al, Cl, (OH)
•
19'
The four different methods must be carried out under a slowly increasing tempera-
ture; a too quick heating would make the aluminium hydrate heavy or insoluble.
The mordants thus obtained have the peculiarity of not compounding with dye
stuffs in a cold temperature, and when steamed, formn colours of a purity and strength
which have hitherto been only obtained by the application of neutral aluminium
sulphocyanide.
These mordants serve therefore in printing not only as substitutes for the costly
sulphocyanides but also for the aluminium acetates, as the same will come considerably
cheaper than the aluminium acetates.
on
For dyeing, the mordants have the advantage of fixing themselves even
unfinished threads without any special means and much less aluminium is lost
in the operation of mordanting than when other aluminium salts are used.
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 :-
1st. Producing basic aluminium chlorides and nitrates up to compound Al. Cl,
OH respectively Al, (NO2), (OH) by dissolving the aluminium hydrate in
aluminium chloride, respectively, aluminium nitrate, as set forth.
16?
2nd. Producing the same compounds by .dissolving aluminium hydrate in hydro
chloric acid, respectively, nitric acid, as set forth.
3rd. Producing the same compounds by mixing basic aluminium sulphate with
barium chloride, respectively, Barium nitrate, as set forth.
4th. Producing the same compounds by neutralization of neutral aluminium
chloride, respectively, Aluminium nitrate, with alkali, as set forth.