An Improved Process for Separating Waste Lye containing Chlorate of Magnesium into Magnesia and Hydrochloric Acid for Manufacturing Carbon Magnesia as Material for Cleansing. Feed Water for Boilers, for Clarifying and Deco- loring all kinds of Fluids, and Especially for Cleansing all kinds of Factory Spent Lye and Sewage Waters, and Rendering the same Innoxious.
Year: 1886

page_text: An Improved Process for Separating Waste Lye containing
Chlorate of Magnesium into Magnesia and Hydrochloric
Acid for Manufacturing Carbon Magnesia as Material for
Cleansing. Feed Water for Boilers, for Clarifying and Deco-
loring all kinds of Fluids, and Especially for Cleansing all
kinds of Factory Spent Lye and Sewage Waters, and
Rendering the same Innoxious.
We, EDUARD BOHLIG, of Eisenach, Germany, Chemist, and G. OTTO HEYNE
of Leipzig in the Kingdom of Saxony, Germany, Engineer, do hereby declare the
nature of our Invention for "AN IMPROVED PROCESS FOR SEPARATING WASTE LYE
CONTAINING CHLORATE OF MAGNESIUM INTO MAGNESIA AND HYDROCHLORIC ACID
FOR MANUFACTURING CARBON MAGNESIA AS MATERIAL FOR CLEANSING FEED WATER
FOR BOILERS, FOR CLARIFYING AND DECOLORING ALL KINDS OF FLUIDS AND
ESPECIALLY FOR CLEANSING ALL KINDS OF FACTORY SPENT LYE AND SEWAGE
WATERS AND RENDERING THE SAME INNOXIOUS" and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement:-
Our Invention relates to an improved process for separating or treating waste or
spent lye containing chlorate of magnesium into magnesia and hydro-chloric acid
for manufacturing carbon magnesia as material for cleansing feed water for boilers,
for clarfying and decoloring all kinds of fluids and especially for cleansing all kinds
of factory lye and sewage waters and rendering the same innoxious (Sterilisirung).
Spent lye containing chlorate of magnesia such as for instance results from the
process of crystallizing out the double salt of chlorate of potash and chlorate of
magnesia as a worthless subsiduary product is mixed with a fixed amount of wood
filings or saw dust and placed in damp condition in an airtight retort and heated
successively up to red glow heat until the gases are driven off or a sample heated
with spirit of ammonia will not produce white vapor-We prefer to employ like
quantities of wood filings or sawdust and chlorate of magnesia lye containing
30% Mg Cl, and intimately mix the same before charging the said mixture into
the retort but we desire it to be understood that we do not confine ourselves to

page_text: this special proportion as the same can be varied without in any way departing
from the tenor of our invention-The acid vapors passing off are led into an
ordinary Glover and converted into hydrochloric acid.
The perfect separation of the chlorate of magnesia into magnesia and hydro-
chloric acid at a comparatively low temperature can only then be attained when
the quantity or concentration of the lye is so chosen that the resulting carbon-
magnesia does not contain much more than 40 per cent magnesia.
On the other hand if too great heat be applied the well known partial decom-
position will ensue.
The carbon-magnesia produced according to this process contains magnesia in
pure finely divided and consequently most efficiently acting form is when brought
into contact with water rapidly converted into a hydrate and serves as filling or
charge for filter cylinders for purifying feed water for boilers and other purposes.
A further appropriate application for our carbon magnesia is for clarifying and
decoloring fluids as substitute for animal charcoal and especially for rendering all
kinds of waters from industrial establishments innoxious, as the magnesia is the
most rational matter or material for effecting this object and while the carbon-
magnesia as such or after its carbonisation by means of fire gases is the most
appropriate form for producing the precipitation of the organic matter or phos-
phoric acid ammonia in such said waters and rendering the same innoxious-
(Sterilisirung).
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is-
The production and manufacture of Carbon-Magnesia from chlorate of magnesia
lye by mixing the latter in fixed concentration and quantity with wood filings or
saw dust and heating this mixture so as to obtain all the hydro chloric acid con-
tained in the same as a subsiduary product and carbon-magnesia as main product
for purifying feed water for boilers, purifying waste waters from industrial
establishments and town sewage waters and also for clarifying and decoloring
of fluids substantially as and for the purposes set forth in the foregoing
specification.
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