Year: 1888

page_text: I, Dr. JULIUS LÖWE, of Frankfort-on-the-Main in the Empire of Germany, do
hereby declare the nature of this invention to be as follows:-
.
Acetate of lead (sugar of lead) has hitherto been manufactured either by digesting
litharge with forty to fifty per cent. acetic acid or by causing the hot fumes of this
acid to act on litharge stacked in layers.
Manufacturing sugar of lead from metallic lead (instead of litharge) and acetic
acid has not proved satisfactory in practice owing to the length of time required to
completely form the sugar of lead and owing to the renewing of the air necessary to
the oxidation of the lead whereby a considerable portion of the acetic acid is wasted by
evaporation.
Granulated metallic lead or thin sheet lead may however, easily be converted into
sugar of lead by means of acetic acid without loss of acid, by adding to the acetic
acid such a quantity of oxygen-yielding compounds such as nitric acid, nitric and
nitrous salts of lead, of sodium (or potassium) peroxide of lead etc., as will just
suffice to completely oxidize the lead. The whole is then heated nearly to boiling
point whilst the fumes evolved are condensed and the condensed product permitted to
run back into the liquid.
In order to carry out this process, take from fifty-four to fifty-five parts by weight
of dilute nitric acid of 1,200 specific gravity containing twenty-eight per cent. acid
bydrate (or a quantity of nitrate of sodium, potassium, lead, and such like, in which
the quantity of combined acid or oxygen corresponds to the above mentioned content
of free acid) and add 145 parts by weight of acetic acid of forty per cent. (or a
correspondingly increased proportion, if nitrate of sodium, potassium, lead, etc., is to

page_text: be decomposed). To this mixture add one hundred parts by weight metallic lead, and
heat the whole nearly to boiling until the metal is dissolved. The solution obtained,
consisting of neutral acetate of lead (sugar of lead) is evaporated down to
crystallization.
DR. JULIUS LÖWE.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.
I, Dr. JULIUS LÖWE, of Frankfort on the Main, in the Empire of Germany, 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:-
Acetate of lead (sugar of lead) has hitherto been manufactured either by digesting
itharge with 40% to 50% of acetic acid or by causing the hot fumes of this
acid to act on litharge stacked in layers.
The manufacture of sugar of lead from metallic lead (instead of litharge) and
acetic acid has not proved satisfactory in practice, owing to the length of time required
to completely form the sugar of lead and owing to the renewing of the air necessary
to the oxidation of the lead whereby a considerable portion of the acetic acid is wasted
by evaporation.
Granulated metallic lead or thin sheet lead may however, easily be converted into,
sugar of lead by means of acetic acid without loss of acid, by adding to the acetic
acid such a quantity of oxygen-yielding compounds such as nitric acid, nitric and
nitrous salts of lead, of sodium (or potassium) peroxide of lead, etc., as will just
suffice to completely oxidize the lead. The whole is then heated nearly to boiling
point whilst the fumes evolved are condensed and the condensed product permitted to
run back into the liquid.
In order to carry out this process, take from 54 to 5 parts, by weight, of dilute
nitric acid of 1.200 specific gravity containing 28% acid hydrate (or a quantity of
nitrate of sodium, potassium, lead, and such like, in which the quantity of com-
bined acid or oxygen corresponds to the above mentioned content of free acid) and

page_text: add 145 parts, by weight, of acetic acid of 40% (or a correspondingly increased propor-
tion, if nitrate of sodium, potassium, lead, etc., is to be decomposed). To this mixture
add 100 parts, by weight, of metallic lead and heat the whole nearly to boiling until
the metal is dissolved. The solution obtained, consisting of neutral acetate of lead,
(sugar of lead) is evaporated down to crystallization.
Having now particularly described and ascertained the nature of the said.
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
The production of sugar of lead from metallic lead by causing acetic acid with the
addition of oxygen-yielding compounds (such as nitric acid, nitrates or nitrites,
peroxide of lead, and the like) to act at, or near, a boiling temperature on the metal.
Dated this 15th day of March 100S.
J. LÖWE.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.
J. LÖWE.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.