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Патент USA US2130104

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Patented Sept. 13,: 1938
2,130,104
UNlTED STATES ‘PATENT OFFICE
2,130,104
STORAGE BATTERYILATE AND METHOD
~
OF MAKING THE SAIHE
John A. Schaei’l‘er and Harold R. Harrier, Joplin,
Mo., assignors to The Eagle-Picker Lead Com
pany, Cincinnati, Ohio, a corporation of Ohio
No'Drawing. Application June 25, 1935,
,
Serial No. 28,357
I
12 Claims. (oi. 136-26) .
Our invention relates to the manufacture of The resultant liquor is removed to the tank with
storage battery plates of the lead acid type and the previous batch. .To the combined liquors is
has for its object to provide a negative plate and a added a mineral acid, of which sulphuric acid is
method for manufacturing the same, which plate an example, with a speci?c gravity of approxi
5 as compared with plates previously manufactured mately 1.835. A precipitate is formed, which is
will have its active material in such a condition of ?ltered o?, washed and allowed to dry. This pre
particle sub-division and physical structure as to cipitate is now treated with alcohol,-either methyl
yield markedly increased initial capacity particu- ‘ or ethyl which dissolves a part of the precipitate.v
larly in high rate and low temperature discharge, Other reagents, of which acetone and other alco
10 and to maintain that increased yield longer dur
h'ols and ketones are examples, may also be used
ing the use of the plate than has heretofore been for this purpose. The alcohol extract is evapo-h
possible.
rated to dryness and the alcohol soluble mate
Our invention consists in the preparation of an rial permitted to dry. The resulting compound is
organic compound and the incorporation of vthis added to the active material or material to be
15 compound into the active material or material to made active in a lead acid storagewbattery plate
be made active in a lead acid storage battery plate and when made into a paste with desirable vehi
either prior to or after incorporation into the cle, applied to storage battery grids and treated by
storage battery grid and which readily combines suitable means in process forms a storage battery
with the lead compound or lead compounds or
20 ?nely divided metallic lead to produce on forma
tion spongy-lead crystals or particles which are
plate characterized by increased initial capacity
particularly in high rate and low temperature "
discharge:
submicroscopic in size, thereby increasing tre
Without desiring to restrict ourselves to the
4 mendously the speci?c surface of the active mate
rial in the plate as compared with the active ma
25 terial of plates made from the same lead com
proportions named, we have found that good re
sults can be achieved by the mixture of one part
use as the raw material certain carbohydrates
30 comprising plant residue’ or agricultural waste of
the group including tanbark, straw, sawdust, corn
compound by adding lead oxide such as litharge,
by weight of our organic compound with ?ve hun-_
pound or compounds or ?nely divided metallic dred parts by weight of the lead materials used in
lead but without our organic compound.
compounding the paste for the plates, giving 0.2%
In the preparation of-our organic compound we of organic material in the dry blend. Again, we
stalks, or leaves, and from this we prepare a com
post by aerobic decomposition. We may - select
straw as an example. To'1,000 parts by weight of
may form a lead salt or complex of our organic
or a lead salt, to asolution of our organic mate
rial, whereupon a precipitate of lead-organic salt
or complex is formed. The amount of organic
compound in the lead-organic complex may be
35 straw we add water equal to 3,000 parts by weight, varied at will by varying the relative amount of _
an ammonium salt 50 parts by weight, lime 50 lead material or lead salt added, although we pre
parts by weight, and phosphate 50 parts by weight. - fer to form a lead-organic complex containing '
In place of the ammonium salt we may substitute about 5% by weight of organic material. This
, nitrate or urea. The compost is allowed to under
lead-organic complex may then be dried, pulver
40 go decomposition during a period of 6 to 12 weeks, _ ized, and added to the other lead material used in
with proper aeration. To approximately 3,000 compounding the paste for the plates so as to pro
parts of this compost with a moisture content of vide the desired amount of_ organic compound in
' substantially 30% we add 30,000 parts of water, the dry blend. It is understood that the percent
as well as an alkali, of which caustic soda is an ages‘ named are approximate only, and that we
45 example, 600 parts by weight. The whole is then may vary them with the type of lead materials
placed in a container and kept at boiling temper
used, and with the results desired. We have used
ature for a period of approximately 12 hours and up to 1% by weight of our organic compound with
then allowed to‘cool, during which time the solid good results, and for special purposes even more
particles settle to the bottom and the supernatant than that amount might be desirable.
clear liquor is decanted into another tank. The
To prepare our active material we add certain
solid residue remaining in the tank is again ad
lead compounds comprising lead oxide or aimix
mixed with water and additional caustic soda ture of lead oxides of the group including litharge,
su?lcient to maintain the alkalinity of the solu
red lead, orange mineral, basic lead sulphate, or
tion, and boiled for an additional period of 12 lead suboxide with or without ?nely divided
hours when the whole is allowed to cool and settle. metallic lead, or we may use ?nely divided metal
2
2,180,104
lie lead alone, and place these in a mixer where
the whole is brought to pasting consistency by
‘the addition of acid (preferably sulphuric)’ with
or without the addition of water. To this we then
add our organic compound or a precipitate formed
by theaddition of lead oxide or lead salt to a solu
tion of our organic compound and the mixer is
again operated until the ingredients are thor
, oughly compounded. In place of adding our or
10 ganic compound separately we may add it simul
taneously with the other materials, and instead
of adding it in the wet mix it may be added in
' the dry blend, the same results being achieved
regardless of the method by which our material
dust, corn stalks or- leaves, with an alkaline solu-
tion, boiling the mixture, separating the resultant
liquor, precipitating the organic complex from
the alkaline liquor by means of sulphuric acid,
?ltering and drying the resulting precipitate, ex
tracting the precipitate with alcohol and evapo- '
rating the alcohol.
5. The method'of controlling the activity of '
lead-acid storage battery plates comprising the
addition of one or more oxides of lead to a pre
10
cipitate resulting from the treatment of a com
post of carbohydrates comprising plant residue
or agricultural waste of the group including
tanbark, straw, sawdust, corn stalks or leaves,
with an alkaline solution, boiling the mixture, 15
separating the resultant liquor, precipitating the
‘a from the paste by the forming of the plates and ‘organic complex from the alkaline liquor by
means of sulphuric acid, filtering and drying the
their use in a battery has greatly increased ca
pacity, especially at high rates of discharge and resulting precipitate, extracting the precipitate
20
20 at low temperature, due to the extremely ?ne with alcohol and evaporating the alcohol.
6. The method of preparing paste for lead
state of particle subdivision produced in the
acid storage battery plates, characterized by the
spongy-lead active material, which quality en
ables us to produce a plate of superior perform-' presence of spongy-lead particles which are sub
ance without loss of either efficiency or durability microscopic in size, comprising treating a com
post of carbohydrates comprising plant residue 25
as compared with battery plates previously pre
or agricultural waste of the group including tan
pared.
>
is added.
By our invention the active material produced
Having thus described our invention what we
claim as new and ,desire to secure-by Letters
Patent, is:
30
1. A paste for lead-acid storage battery plates
consisting of one or more oxides of lead thor
oughly mixed with a substance resulting from the
treatment of -a compost of carbohydrates com
prising plant residue or agricultural waste of the
13 (ii group including tanbark, straw, sawdust, corn
bark, straw, sawdust, corn stalks or leaves, with
an alkaline solution, boiling the mixture, sepa
rating the resultant liquor, precipitating the or
ganic complex from the alkaline liquor by means 30
of sulphuric acid, ?ltering and drying the re
sulting precipitate, extracting the precipitate
with alcohol, evaporating the alcohol, and mix~
ing the resultant precipitate with ?nely divided
stalks or leaves, with an alkaline solution, boiling
35
metallic lead.
'7. A lead-acid storage battery plate, the active
the mixture,'separating the resultant liquor, pre
cipitating the organic complex from the alkaline
cles which are submlcroscopic in size, consisting
liquor by means of sulphuric acid, ?ltering and
40 drying the resulting precipitate, extracting the
precipitate with alcohol and evaporating the
alcohol.
2. A paste for lead-acid storage battery plates
consisting of finely divided metallic lead thor
oughly mixed with a substance resulting Irom
the treatment of a compost of carbohydrates com
prising plant residue or agricultural waste oi the
group including tanbark, straw, sawdust, corn
stalks or leaves, with an alkaline solution, boiling
the mixture, separating the resultant liquor, pre
cipitating the organic complex from the alkaline
liquor by means of sulphuric acid, ?ltering and
drying, the resulting precipitate, extracting the
precipitate with alcohol and evaporating the
alcohol.
'
.
3. A paste for lead-acid storage battery plates
consisting of ?nely divided metallic lead together
with one or more oxides of lead, thoroughly mixed
‘ with a substance resulting from the treatment
60 of a compost of carbohydrates comprising plant
material of which comprises spongy-lead parti
of one or more oxides of lead mixed with a pre
cipitate resulting from the treatment of a com
or agricultural waste of the group including
tanbark, straw, sawdust, corn stalks or leaves,
with an alkaline solution, boiling the mixture,
separating the resultant liquor, precipitating the 45
organic complex from the alkaline liquor ‘by
means of sulphuric acid, ?ltering and drying the
resulting precipitate, extracting the precipitate
with alcohol, evaporating the alcohol. '
8. The method of preparing a paste for use in
the manufacture of lead acid storage battery
plates which comprises mixing ?nely divided me
tallic lead together with a lead compound or lead
compounds and a substance resulting from the
treatment of a compost of carbohydrates com 55
prising plant residue or agricultural waste of the
group including tanbark, straw, sawdust, corn
stalks. or leaves with an alkaline solution, boiling
the mixture, separating the resultant liquor, pre
cipitating the organic complex from the alkaline
residue or agricultural waste of the group in
liquor by means of sulphuric acid, filtering and
cluding tanbark, straw, sawdust, corn stalks or
leaves, with an alkaline solution, boiling the mix
precipitate with alcohol and evaporating the
ture, separating the resultant liquor, precipitating
alcohol.
drying the resulting precipitate, extracting the .
'
means of sulphuric acid, ?ltering and drying the
9. The method of preparing a paste for lead
acid storage battery plates which comprises mix
resulting precipitate, extracting the precipitate
ing one or more oxides-of leadselected from the
65 the organic complex from the alkaline liquor by
with alcohol and evaporating the alcohol.
4. The method of preparing a paste for use in
70 the manufacture of lead-acid storage battery
plates which comprises mixing a lead compound
or lead compounds with a precipitate resulting
from the treatment of a compost of carbohy
drates comprising plant residue or agricultural
waste of the group including tanbark, straw, saw
40
post of carbohydrates comprising plant residue
group consisting of litharge, red lead, orange
mineral, basic lead sulphate, or lead suboxide with
a substance resulting from the treatment of a 70
compost of carbohydrates comprising plant resi
due or agricultural waste of the group including
tanbark, straw, sawdust, cornstalks, or leaves
with analkaline solution, boiling the mixture,
separating the resultant liquor, precipitating the TI
2,130,104
organic complex from the alkaline liquor by
means of sulphuric acid, ?ltering and drying the
resulting residue, extracting the residue with al
cohol and evaporating the alcohol.
10. The method of preparing a paste for lead
acid storage battery plates which comprises mix
ing ?nely divided metallic lead together with one
or more oxides of lead selected from the group
consisting of litharge, red lead, orange mineral,
10 basic lead sulphate, or lead suboxide with a sub
stance resulting from the treatment of a compost
of carbohydrates comprising plant residue or
agricultural waste of the group including tan
bark, straw, sawdust, cornstalks, or leaves with
15 an alkaline solution, boiling the mixture, sepa
rating the resultant liquor, precipitating the or
ganic complex from the alkaline liquor by means
of sulphuric acid, ?ltering and drying the result
ing residue, extracting the residue with alcohol
243 and evaporating the alcohol.
11. A paste for lead acid storage battery plates
consisting of ?nely divided metallic lead together
with one ormore oxides of lead selected from the
group consisting of litharge, re'd lead, orange
25 mineral, basic lead sulphate, or lead suboxide
and an alcohol soluble organic substance result
ing irom the treatment ofla compost of carbo
~ 3
hydrates comprising plant residue or agricultural
waste of the group including tanbark, straw, saw~
dust, cornstalks, or leaves with an alkaline solu
tion, boiling the resultant mixture, separating
the resulting liquor, precipitating the organic
5
complex from the alkaline liquor by means of
sulphuric acid, ?ltering and drying the result
ing residue, extracting the residue with alcohol
and evaporating the alcohol.
12. A paste for lead acid storage battery plates 10
consisting of one or more oxides of lead selected
from the group consisting of litharge, red lead,
orange mineral, basic lead sulphate, or lead sub
oxide, and a substance consisting of an alcohol
soluble organic complex resulting from the treat
ment of a compost of carbohydrates comprising
plant residue or agricultural waste of the group
15'
including tanbark, straw, sawdust, cornstalks, or
leaves, with an alkaline solution, boiling the mix
ture, separating the resultant liquor, precipitat 20
ing the organic complex from the alkaline liquor
by means of sulphuric acid, ?ltering and drying
the resulting residue, extracting the residue with '
alcohol and evaporating the'alcohol.
JOHN A. SCHAEFFER.
HAROLD R. mm.
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