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Патент USA US2120128

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Patented June 7, 1938
mmm'ron CLEANKNG comosrrron
Benjamin Gall'sworthy, Glenham, N. Y., assignor
to The Texas Company, New York, N. Y... a
corporation otDelaware
No Drawing. Application August 27, 1934,
Serial No. 741,741
1i Claims.
This invention relates to a radiator cleaning
compound adapted to be added to the circulating
water of a radiator of an internal combustion en
gine, for the purpose of removing accumulated
5 rust, dirt and scale and increasing the co-e?lcient
of heat transfer of the radiator shell and cylinder
Various types of radiator cleaning composi
tions of this character have heretofore been sug
gested, but have been in the main either com
paratively ineffective for the purpose or else ob
jectionable as dangerous to use because of chem
ical attack upon the metal parts of the circulat
ing system, solder, hose connections and the like.
Such compositions have generally been in the
form of dry powders to be added to the circulat
ing water, or‘ concentrated water solutions.
.While having some bene?cial‘ effect upon depos
ited scale or dirt, such materials are generally
20 ineffective in removing the scum of deposited oil
which accumulates‘ in a radiator of this char
In order to remove ‘such an oily ‘scum, a
petroleum fraction of the character of kerosene
has been employed. However, it has proved difli
25 cult to secure an e?ective mixture of kerosene
with a cleaningcompound,v in order to secure
the desired easy handling and addition of the
materials to‘ a radiator for effective distribution
It is an object of the present invention to pro
vide a radiator cleaning'composition of this char
acter which is effective in removing both scale
and oily scum without objectionable action upon
materials of the circulating system, and to pro;
vide the composition in a highly effective form
which can be easily handled and directly added
to the circulating water so as to obtain maximum
In accordance with the present invention the
40 radiator cleaning composition is a concentrate in
the form of a water-oil emulsion containingv a
permanent or semi-permanent emulsion of the
water. kerosene and alkali metal cleaning com
pound. Various alkali metal soaps or trieth—
anolarnine soaps can be used for this purpose.
But, preferably, an alkali metal soap of acids of 5
oxidized waxy hydrocarbons is employed as con
stituting a highly e?ective andi'economical emul
sifying agent. A. very satisfactory material of
this character is obtained by forming the alkali
metal soap of acids of oxidized para?in wax, the m
latter being prepared as disclosed in my U. S.
Patent No. 1,909,945. As set forth in the patent,
a charge of para?in wax, for example crude scale
wax having a gravity of between 48° and 50°
A. P. I. at 130° F., is placed in an enameled or 15
aluminum vessel which is preferably jacketed or
otherwise ?tted to permit heating or cooling of
the contents.
The vessel is also ?tted with an
air distributor, preferably located near the bot
tom, through which air may be introduced in fine
streams to promote intimate contact of the air
with the oxidizing mass. If the vessel is well
insulated, the heat developed by the oxidation
will be su?icient to maintain the charge at the
proper temperature, once it has been brought to
that temperature by outside means such as a
steam coil. The charge of wax may be heated
to a temperature between 260° and 335° F. and
air may be introduced in sufficient quantity to
maintain the desired temperature. The most 30
satisfactory temperature range for the oxidation
has been found to be about 3l5°-320° F. The
oxidation is allowed to proceed until the batch
attains a gravity of 33°~35° A. P. I. By carrying
out the oxidation in this manner, a material is 35
produced having a low acid value while contain
ing a relatively large’ amount of saponifiablev
- bodies or esters.
Moreover, the oxidized material
is substantially free from red gum, which is that
material insoluble in naphtha, for example an 40
86° Bé. gasoline. The resulting oxidized material
cleaning compound’ and an emulsifying agent.
is then subjected to sweating at 90°-100° F. and
The oil employed is preferably a kerosene frac
separated into approximately % of semi-liquid
sweatings ‘and 1/3 of solid waxy material. The
tion. Various. types of alkali metal cleaning
45 compounds can be employed, which are of a char
acter to e?ect desired removal f rust; scale and
dirt and at the same time avoid injury to the
' (Cl. 87-5)
sweatings so obtained had approximately the fol- 45
lowing tests:
metal and rubber parts of the circulating system.
Gravity, °Bé _______________________ __
A very satisfactory material of this character is
Viscosity at 100° F__________________ __ 205 S.U.
sodium metasilicate. However,‘ ordinary water
Pour, "F ___________________________ __
Neutralization No _____ _____________ __
glass or other alkalimetal or soluble silicates can
. be employed.
Likewise, trisodium phosphate or
other alkali metal phosphates can be used.
An emulsifying agent, preferably in the form
55 of an ‘alkali metal soap, is employed to form a
Saponi?cation No ___-_ ______________ .._
25.8 50
The following is an example of the preparation
of a radiator cleaning composition of this inven
tion, utilizing the oxidized para?in wax sweatings 55
obtained as above outlined. The following in
gredients were heated together at around 180° F.
for 7 hours, with occasional stirring:
Percent by
weight I
over night in the radiator, which is then drained
and ?ushed. The proportions in which the in
gredients of the composition can be employed
and the strength of the concentrate, can be varied
~within wide limits; and it ‘is to be understood that
the above is given by way of example and not by
way of limitation.
Oxidized para?in wax sweatings _____________ __
Sodium hydroxide 95 percent ________________ __
I The mixture lost 247 g. in weight during the above
saponi?cation which left it with the following
approximate composition:
of the invention, as hereinbefore set forth, may}
be made without departing from the spirit and 10
scope thereof, and therefore only such limita
tions should be imposed as are indicated in the
appended claims.
I claim:
Percent by
Obviously many modi?cations and variations
1. A radiator cleaning composition consisting 15
essentially of a preformed concentrated emulsion
of water in kerosene containing a soluble silicate
Oxidized paraffin wax sweatings
79. 68
5. 31
Water _______________________________________ __
15. 00
Sodium hydroxide 95 percent__
50.0 g. of this impure sodium soap of oxidized
para?in wax acids, prepared as outlined above,
was then mixed at 180° F. with 1000 g. of water.
25 The mixture was then allowed to stand and
and the sodium soap of acids of oxidized para?in
wax, the composition being adapted to be added
directly to the circulating water of an internal 20
combustion engine cooling system to form a di
lute emulsion of cleaning effectiveness therewith.
2. A radiator cleaning composition consisting
essentially of a preformed concentrated emulsion
of water in kerosene containing sodium metasili 25
stratify into 2 layers. The top layer, amounting
cate and the sodium soap of acids of oxidized
to about 20% by volume and consisting. mainly of
unsaponi?able waxes, was removed from the bot
tom layer of soap solution, while the material
para?in wax, the composition being adapted‘to
30 was still warm (about 120° F.).
To, this soap
solution was added about 10% by weight of
sodium metasilicate, ‘and-the material agitated
until the metasilicate dissolved. Approximately.
75% by weight of this soap solution containing
35 the metasilicate was then agitated in a high speed
stirrer with 25% by weight of kerosene, until a
good emulsion ‘was obtained which showed little
‘signs of separation after standing 1 week.
be added directly to the circulating water of an
internal combustion engine cooling system to form
a dilute emulsion of cleaning effectiveness there 80'
3. A radiator cleaning composition comprising
a preformed concentrated emulsion consisting of
about 75% by weight of a sodium soap of oxidized
paraffin wax sweatings in solution in about twice 35
the weight of water of the said sweatings, and con
taining about 10% by weight of sodium metasili
cate on the weight of the said soap solution, to
The above concentrate in the form of an emul ‘ gether with about 25% by weight of kerosene.
‘sion has many advantages in ease of handling
4. The method of forming a. radiator cleaning
composition, which consists of mixing an-alkali
and in effectiveness as a. radiator cleaner. In use,
the concentrate may be poured directly into a metal soap'of oxidized paraffin wax acids with
large volume of water in the circulating system,
whereupon with running of the engine, a dilute
45 emulsion ‘is formed throughout the circulating
system. For example, about 1/2 to 3 pounds of ‘the
- concentrated emulsion may be added to approx
imately 2-3 gallons of circulating water to give
an effective cleaning action. The radiator engine
50 may be run for about 30 minutes, and then the
radiator drained and flushed. Or, if desired, the
cleaning composition may be allowed to remain
water, dissolving therein an alkali metal silicate,
‘and then emulsifying the said solution with kero
sene to produce a preformed concentrated ‘stable 46
emulsion which is adapted to be added in said
emulsified condition directly to the circulating
Water of an internal combustion engine cooling
system to form a dilute emulsion of cleaning ef
fectiveness therewith.
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