Process of Producing Barium Chlorate Page: 1 of 2
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UNITED STATES PATENT OFFICE.
EUGENE P. SCHOCH, OF AUSTIN, TEXAS.
PROCESS OF PRODUCING BARIUM CHLORATE.Specification of Letters Patent. Patented Sept. 27, 1921.
Application filed September 13, 1920. Serial No. 409,794.To all whom it may concern:
Be it known that I, EUGENE P. So joon, a
citizen of the United States, residing at
Austin; in the county of Travis and State
5 of Texas,' have invented- certain new and
useful Improvements in Processes of Pro'
ducing Barium Chlorate; and I do hereby
declare the following to be a full, clear, and
exact description of the invention, such as
10 will enable others skilled in the art to which
it appertains to make and use the same.
This invention relates to a process of mak-
ing substantially pure barium chlorate and
has for its object to provide a procedure
15 which will be more expeditious and less
costly to carry out than those heretofore pro-
posed.
- With these and other objects in view the
invention consists in the novel- steps and
20 combinations of steps . constituting the
process all as will be more fully hereinafter
disclosed and particularly -pointed out in the'
claims.
In order that the precise invention may be
25 the more clearly understood it is said: It is
well known that chlorin will react with
barium carbonate suspended in hot water,
or with a hot, dilute solution of barium
hydroxid so as-to form: a mixture of barium
30 chlorate and barium chlorid in substantially
the molecular ratio of 1 to 5. It is, how-
ever, taught in the well known text book of
chemistry by Alexander Smith and it is com-
monly believed from other sources to be a
35 fact that, the resulting mixture of barium
chlorate and chlorid cannot be readily or
economically separated because the two salts
are' held to have very ' nearly the same solu-
bilities.
40 I have on the other hand, discovered that
these two salts can be easily and economi-
cally separated from their - solutions and
each obtained in a substantially pure state
by a process of crystallization.
45 In carrying out the invention I may dis-
solve a mixture of barium chlorate and
chlorid in any quantity of hot water suffi-
cient for that purpose, and evaporate the
same by boiling until the solution is- satfu-
50 rated with the chlorate. ' Should the ratio- of
chlorate to chlorid be substantially less than
one to one by weight or for instance, near
the molecular ratio of 1 to 5, as it will be
when made with chlorin and a barium com-
55 pound as above- indicated, then before the
point of saturation for barium chlorate isreached, barium chlorid will separate out of
the hot solution and the crystals thus formed
will be -found to be substantially pure.
But as the remaining hot liquor becomes 60
relatively richer in- chlorate the crystals of
chlorid formed will include small amounts
of the said chlorate, although this impurity
will never be found to exceed-say 4% at the
maximum. -.-. 65
Starting - with a mixture of chlorate and
chlorid in said molecular ratio of say, about
1 to 5,. I have found in practice that one may
thus readily obtain from the hot solution
two thirds of the chlorid crystals formed in 70
a substantial state of -purity. Accordingly,
as the crystallization proceedsI remove these -
said pure crystals, and I may use them over -
again in making a -new batch of the original
mixture.- The contaminated -crystals of 75
chlorid above mentioned may also be added
to said new batch and -worked over again
with it.
The chlorid crystals formed from the. hot
solution having been- thus removed, the so-. 80
lution is allowed to cool, whereupon a mix-
ture of chlorate and chlorid crystals contain-
ing substantially 70%, chlorate to 30% of
chlorid is obtained. These crystals will con-
tain two thirds or more of the chlorate origi- 85
nally present in the solution. These last
named mixed crystals are removed from the
-cool solution, drained and- washed as usual,
and then dissolved in the least amount of
hot water necessary for the purpose. The 90
second solution thus obtained is evaporated
by. boiling. to a slight extent for the purpose
of reaching the saturation point of the first
salt., crystallizing out which will be barium
chlorate. This said second solution is next 95
allowed- to cool, whereupon substantially
pure barium chlorate crystals will be found
to separate out and may be removed.
The amount of pure barium chlorate .crys-
tals thus obtained pure and - removed from 100
the solution will be about one half of the
original. chlorate present in the solution.
The remaining liquors from both the first
and- the second solutions above mentioned
now contain chlorate and chlorid in a ratio 105
by weight which is much less than one to
one, and they may be again subjected to the
above mentioned first crystallizing process,
either by themselves, or together with the
above mentioned new batch of the original i i o
mixture. It will thus be seen that when the
ratio of chlorate to chlorid is less than one1,391,858.
No Drawing.
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Schoch, Eugene P. Process of Producing Barium Chlorate, patent, September 27, 1921; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1257622/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.