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Патент USA US2057189

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Patented Oct. 13, 1936
2,057,189
v UNITED STATES PATENT OFFICE
2,057,189
IVIETHOD OF CLEANING FEED
WATER HEATERS
Frank H. Graham and Vern D. Washburn,
Jackson, Mich.
N0 Drawing. Application April ‘14, 1932,
Serial No. 605,349
3 Claims.
This invention relates to an improved decar
bonizing and degreasing composition and the
method of using the same.
In its broadest as
pect, this invention has application in all ?elds
5 in which the removal of oils, greases and like
foreign matter from surfaces is desired. More
speci?cally considered, this invention has par
ticular application in providing a decarbonizing
composition which will readily remove the
gummy carbon which accumulates in locomotive
feed water heaters resulting from the oil carried
in the exhaust steam employed to heat the feed
water.
It is a purpose of this invention to provide a
decarbonizing and degreasing composition which
does not possess the undesirable features of
known compositions employed for similar pur
poses, namely, low ?ash point and rapid evap
oration, yet possesses a greater affinity for dis
20 solving carbonized oils and greases than more
volatile solvents for oil and greases.
It is a further object of this invention to pro
vide a decarbonizing and degreasing composi
tion which is not appreciably affected in its ac
25 tion by repeated use and may be readily re
conditioned thus effecting decided economy in its
employment.
Other objects and advantages of this invention
will appear as the description of the invention
39 proceeds.
It is to be distinctively understood,
however, that we do not intend to limit ourselves
to the exact details described but that we intend
to include as a part of our invention, all such ob
vious changes and modi?cations of ingredients
as would occur to those skilled in this art and
would fall within the scope of the claims.
In the preparation of our improved decarbon
izing and degreasing composition, we employ a
light lubricating oil, constituting 60% to 85%
of the volume, as a base. Any of the oils dis
tilled off between and including gas oil and red
engine oil has been found suitable to varying
degrees. Such oils have a Saybolt viscosity at
100° F. of about 50 to 200 and a ?ash point of
45 about 265° to 410° F. Preferably we employ a
para?ine oil with a ?ash point of approximately
330° F. and of a viscosity of 80-85 at 100° F.
(01. 87-5)
To facilitate the decarbonizing and degreasing
action of the composition, the vat may be
equipped with an agitator. In operation, it has
been found that a locomotive feed water heater,
after a 75,000 mile run, literally clogged with a
gummy carbonized coating of oil and grease car
ried by the exhaust steam, may be completely
cleaned in 15 to 30 minutes by soaking in a vat
containing our improved composition.
In actual operation, an open vat containing 10
84 gallons of our improved composition has been
in continuous operation for three weeks, clean
ing large locomotive feed water heaters with
less than 5% evaporation and no observable de
crease of the effective cleaning properties.
From the foregoing description it will be ap
parent to those skilled in the art that we have
provided a decarbonizing and degreasing com
position which is particularly eifective in clean
ing locomotive feed water heaters and the like
having a high ?ash point and a low rate of
evaporation.
Having thus described our invention, what we
claim as new and desire to protect by Letters
Patent is:
25
1. The process of removing the gummy coat
ing formed by the deposit of burned and carbon
ized lubricating oil from exhaust steam, result
ing from the high temperature of the exhaust
steam in exhaust steam heated feed water heat
ers, and the like, which comprises immersing
the heater in a composition comprising 60 to 85
percent paraffin oil distilled off directly above
gas oil having a Saybolt viscosity at 100° F. of
about 50 to 200 and a ?ash point of about 265°
F. to 410° F., and 15 to 40 percent coal oil at a
temperature substantially between 150° F. and
250° F., said proportions being by volume.
2. The process of removing the gummy coat
ing formed by the deposit of burned and carbon 40
ized lubricating oil from exhaust steam, resulting
from the high temperature of the exhaust steam
in exhaust steam heated feed water heaters,
and the like, which comprises immersing the
heater in a composition comprising 60 to 85
percent paraf?n oil distilled off directly above
tory cleaning properties at normal atmospheric
gas oil having a Saybolt viscosity at 100° F. of
about 50 to 200 and a ?ash point of about 265°
F. to 410° F., and 15 to 40 percent coal oil, and
agitating said composition at a temperature
substantially between 150° and 250° F., said pro
temperatures, we prefer to heat the same in a
portions being by volume.
To the paraf?ne oil base, 15% to 40%, by vol
ume, of a mineral burning oil, preferably coal
oil, is thoroughly mixed.
Although our composition possesses satisfac
vat between 150° F. and 250° F. and immerge
55 the feed water heater or the like in the same.
0
3. The process of removing the gummy coating
formed by the deposit of burned and carbonized 55
2-
'
7
2,057,189
lubricating oil from exhaust steam, resulting
from the high temperature of the exhaust steam
in exhaust steam heated feed water heaters, and
having a Saybolt viscosity at 100° F. of about 50
to 200 and. a ?ash point of about 265° F. to 410°
F., and 15 to 40 percent coal oil, said proportions
the'like, which comprises immersing the heater
being by volume.
in a composition comprising 60 to 85 percent
para?in oil distilled off directly above gas oil
VERN D. WASHBURN.
FRANK H. GRAHAM. -
5
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