Improvements relating to the Manufacture of Cream of Tartar.
Year: 1898

page_text: Date of Application, 27th Dec., 1898
Complete Specification Left, 26th Sept., 1899-Accepted, 28th Oct., 1889
Improvements relating to the Manufacture of Cream of Tartar.
I, AUGUSTE MARTIGNIER, of Quai de la Bordigue, Cette, in the Republic of
France, Manufacturer, do hereby declare the nature of this invention to be as
follows:
The cream of tartar manufactured by the ordinary French, English, Spanish,
and other processes, contains generally 85 to 90% of bitartrate of potash, the
principle impurity being tartrate of lime
My process, the subject of the present invention, has for its object to obtain
cream of tartar containing about 99% bitartrate of potash. This process is
based on the chemical action of hydrochloric or sulphuric acid on tartrate of lime,
following the equations.
-
CH'CaO + 2HCl
= C'HO + CaCl³.
CH*CaO + H*SO*=CH*O* + CaSO*.
In practice, the addition of one of the acids above mentioned causes, even in
the heating apparatus used for the first refining operation, red crystals, especially
when the taitarized matters employed for this manufacture are poor in bitartrate
of potash and rich in tartrate of lime The crude cream of tartar thus obtained
contains already 96 to 97% of bitartrate of potash It undergoes afterwards a
second refining, during which, a new addition of hydrochloric or sulphuric acid
is made. The quantity of acid employed must be slightly in excess of the
amount of tartrate of lime The tartrate of lime is thus transformed into tar-
taric acid, which remains dissolved in the mother liquor.
The cream of tartar, after crystallisation, washing, and drying, yields 99 % of
bitartrate of potash It is equally urgent that the bone-black which serves to
discolour the product should have a pieliminary washing with one of the acids
above mentioned
The tartaric acid contained in the mother liquor is transformed finally into
tartrate of lime by known processes
Thated the 27th day of December 1898
Improvements relating to the Manufacture of Oream of Tartar.
I, AUGUSTE MARTIGNIER, of Quai de la Bordigue, Cette, in the Republic of
France, Manufacturer, do hereby declare the nature of this invention and in
[Price 8d]

page_text: what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
The cream of tartar manufactured by the ordinary French, English, Spanish,
and other processes, contains generally 85 to 90% of bitartrate of potash, the
principal impunity being taitiate of lime.
My process, the subject of the present invention, has for its object to obtain
cream of tartar containing about 99 % bitartrate of potash
This process in
based on the chemical action of hydrochloric or sulphuric acid on tartrate of lime,
following the equations:-
-
what manner the same is to be performed, to be particularly described and ascor-
tained in and by the following statement:-
-
The cream of tartar manufactured by the ordinary French, English, Spanish,
and other processes, contains generally 85 to 90% of bitartrate of potash, the
principal impunity being taitiate of lime.
My process, the subject of the present invention, has for its object to obtain
cream of tartar containing about 99 % bitartrate of potash
This process in
based on the chemical action of hydrochloric or sulphuric acid on tartrate of lime,
following the equations:—
-
(1) C'H'CaO + 2HCl
(2)_C*H*CaO® + HSO*
1
CH'O + Ca CI'.
C*H*O* + Ca80*.
In practice, the addition of one of the acids above mentioned causes, even in
the heating apparatus used for the first refining operation, red crystals, especially
when the tartarized matters employed for this manufacture are poor in bitartrate
of potash and rich in tartrate of lime The crude cream of tartar thus obtained
contains already 96 to 97 % of bitartrate of potash It undergoes afterwards a
Becond refining, during which, a new addition of hydrochloric or sulphuric aoid
18 made
The quantity of acid employed must be slightly in excess of the
amount of tai trate of lime. The taitiate of lime is thus transformed into tar-
taric acid, which remains dissolved in the mother liquor.
The cream of tartar, after crystallisation, washing, and diying, yields 99% of
bitartrate of potash It is equally urgent that the bone-black which serves to
discolour the product should have a preliminary washing with one of the acids
above mentioned
The tartaric acid contained in the mother liquor is transformed finally into
tartrate of lime by known processes.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim 18-
The process of manufacture of cream of tartar of high quality, which consists
in the employment, in the course of two refinings, of hydrochloric or sulphurio
Acid as above described
Dated this 26th day of September 1899,
NEWTON & SON,
Agents for the Applicant 8