close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2016265

код для вставки
Patented Oct. 1, 1935 ‘
' 2,016,265
UNITED STATES PATENT OFFICE
2,016,265
-,
g
1
Y
omsnmo comrosmon
erty, Houston, 'l'ex., assignor to
Standard Oil Development Company, a corpo
No Drawing. Application April 9, 1932,
Serial No. 604,351
SCIalms. (Cl. 87-5)
This invention relates‘ to improvements in
For removing paint;' by preparing a 25 to 75%
cleaning compositions, especially adapted for
cleaning oily surfaces. In its preferred form the
invention comprises
'
treatment of petroleum with
concentrated sulphuric acid and mixed with alka—
lies such as sodiumhydroxide, sodium carbonate,
tri-sodi'um phosphate“, etc.
,
water solution of the composition and jetting with
steam onto paint to be removed and rinsing oil
with clean water.
For opening drain pipes and traps; 15 ounces
of the composition is dissolved in one gallon oi’
(water, heated and poured into. the drain pipe.
|
For .reclamation work; use steel vats large
enough to receive the material to be cleaned.
The steel vats'should be so constructed that heat 10
concentrated sulphuric acid, an acid or may be applied. The temperature of. 180° vto
group ofacids and other materials which separate 20.0“ F. gives the best results. A pulley may be
out in an acid sludge layer. The sludge layer is placed above the vat to raise and lower the equip
15 partly puri?ed by separately removing the oil and . ment to be cleaned. Allow the equipment to, re
sulphuric acid. I
'
.
main‘ in the hot solution approximately two 15
The sludge is ?rst washed with a medium heavy hours. Remove and rinse with clear water. This
will put the equipment in shape to be easily
petroleum distillate and after agitation and strat
There is formed by the treatment of petroleum
oils, such as lubricating oils, with large ‘quanti
i?cation, the oil layer is drawn of! carrying with
it a considerable portion of the oil. The remain
ing sludge is diluted with water su?lcient to form
two layers. after agitation with steam. The mix
time ‘after being thoroughly agitated with steam
is allowed to settle and the water layer contain
25' ing the major portion of the sulphuric acid pres
ent in the sludge is removed. The residual sludge
layer is extracted with naphtha for removal of
the remaining fraction of oil.
worked
over.
"
following:
‘
7
>
‘
'
f
"
25
Pine oil
'l‘rlsodium
phosphate
Water
Total
volume
Pounds
.250
Gallons
5.
Pound:
2. 2
Gallon:
95
Gallon: 125
250
5
6. 0
Bases
.
_
Alternate forms of cleaning compositions are
prepared in which puri?ed acid sludges neutral- 2o
ized with sodium. or potassium hydroxide and
having sodium or potassium hydroxide in excess
up to 10%, are used as bases “according to the
The separate sludge layer containing sludge
30
'
~ 35
Part
I _
.
ly puri?ed
sludge
'(20 to 35% sludgePer‘
cent
acids)
_____________ __._____’__
50
Sodium hydroxide ___________________ __ 15 to 17
250
5
12. 0
250
10
22. 0
250
15
26. 0
g 95
i
126
80
110
85
120
85
125
The compositions are suitable for cleaning sur
faces. Paints are readily removed when the com
Sodium carbonate__________ __- _______ __ 13 to 15 positions are suitably applied, as with a jet of
The amount of alkali is suilicient to neutralize steam. Greases are readily removed‘. The com
’ - all or‘most oi’ the sludge acids. They should be
40
always neutralized to a substantial extent‘ but
some free acidity is not objectionable.
'
.
This composition is dissolved in hot or cold wa
ter in the proportions 01' 10 ounces, ‘or about 1/2
pint toa gallon oi water may be used as fol
80.
35
positions are especially adapted for cleaning ga
rage ?oors and driveways, especially where ithis
desired to remove oil from concrete, or composi 40
tion ?oors, etc.
'
The foregoing description is merely illustrative
and various changes and alternative arrange
ments may be made within (the scope of the ap
. For cleaning surfaces; by wetting the surface . pended claims in which it is my‘ intention to 45
claim all novelty inherent in the lnventionas
to be cleaned with the prepared solution, allow
broadly as the prior art permits.
ing to stand or soak for about ten minutes, then
I claim:
scrubbing or rubbing with a brush and rinsing oi! _
1. A method oi’ preparing a cleaning composi
with clean water.
tion ‘which comprises a sludge separated from 50
For cleaning'oily rags, etc.; heating the pre
pared solution and soaking the oily rags in the concentrated sulfuric acid treatment of petroleum
oils and puri?edby separately treating the sludge
hot solution" for several
hours, then rinsing out, with
petroleum distillates to substantially remove
with clear water.
lows:
‘
‘
-
'
‘
oil, by separately treating the residual sludge with
2
.
2,010,205
layer, treating the‘ residual sludge layer with
and steam to substantially remove all the - water and steam and removingthe acid ‘water
sulfuric acid, by separately treating the residual layer, treatingv the residual sludge layer with
sludge with naphtha to remove the remaining ‘naphtha and removing the naphtha layer and
fraction of oil and adding to the- residual sludge adding to 50% of the partly puri?ed sludgel15
sodium hydroxide in excess, pine oil, trisodlum ‘to 17% of an alkali metal hydroxide and 13 to
phosphate and water.
15% of an alkali metal carbonate._
2. Amethod of preparing a cleaning composi
‘ 3. Method according to claim 2 m which the ;.
tion, which oomprises treating petroleum oils alkali metal hydroxide is sodium hydroxide and
with concentrated sulfuric acid, separating the the alkali metal carbonate is sodium carbonate: m
sludge la'yer, treating the sludge layer with me
WlLFB-ED 'r. DOHERTY.
water
'10 dium heavy oil distillate and removing the oil
Документ
Категория
Без категории
Просмотров
0
Размер файла
165 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа