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Патент USA US2113009

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April 5, 1938.
' 2,113,009
Original Filed July 16, 1935
Patented Apr. 5, 19387
Claude F. Tears, Warren, »Pa., assignor to The
Petroleum Processes Corporation, Wichita,
Kans., a corporation of Kansas
Original application July 16, 1935, Serial ‘No;
31,567. Divided and this application July 1,
g 1936, Serial No. 88,356
8 Claims. (oi. 210-51')'
This invention relates particularly to improvements in oil re?ning and is a division of copend-
Fig. 3 is a broken perspective view of the off
take and sampling spout at the end of the swing
ing Patent 2,049,277 of July 28, 1936.
In the ‘art of separating solids and/or semi5 solids from liquids by settling, or separating 'immiscible liquids by settling, it is highly desirable
to determine the exact line of demarcation between the settled layer and the liquid or solution
The invention is illustrated in its application‘
to the process of dewaxing and partially decolor- 5
izing lubricating oil disclosed in the patent appli
cation Ser. No. 31,567. The operation‘ of that
process involves the use of horizontal closed pres
above it, so that the upper layer may be fully
10 removed unmixed with the separated or settled
sure tanks, such as indicated at M. These are
charged with a solution of oil in a normally gase- 10
ous lique?ed hydrocarbon, such as propane,
In re?ning oils by settling from solutions of oil
in normally gaseous lique?ed hydrocarbons, the
problem is complicated by the fact that the sol-
under pressure and the solution is chilled by
evaporation of a portion of this solvent. The
chilled solution is then permitted to settle under
15 vent being normally gaseous, must be held under
a superimposed pressure in excess of the normal 15
pressure to keep it in the liquid state at tempera' tures above its normal boiling point.
vapor pressure of the solvent at the temperature
of the chilled solution.
‘ The above mentioned Tears patent application
covers a dewaxing and partial decolorizing proc-
The wax and color con
stituents settle from the chilled mixture and for
proper operation of the process, it is essential to
2 O ess for lubricating oils involving separation of
locate the top of thewaxy layer and to follow 20
solid or semi-solid wax and solid or semi-solid
it down until a time is reached when it ceases to
color constituents from oil solutions in normally
drop further and which then indicates that set
gaseous liquefied hydrocarbons by cold- settling tling is complete. 'It is then essential towithdraw
under pressure. The earlier Tears Patent 2,000,25 427 covers a process for the manufacture of high
the oil solution above the waxy layer down to a '
level as close as possible to the waxy layer and to 25
melting point‘ wax by cold settling under pressure. In both processes, it is essential ‘to deter-
accomplish this without removing any of the
waxy layer. Failure to remove all the oily layer
mine as near as possible the location of the waxy results in a loss of oil yield, while removal of part
layer in a closed tank under pressure and to reof the waxy layer with the oily layer results in a
30 move the supernatant oily layer as close as pos- ?nished oil of too high color and too high pour 30
sible to the waxy layer. The swing line construc- test.‘
tion of the present invention accomplishes these I
The adjustable Swing line. here disclosed,
carrying with it a sample line, provides practical
The objects of the invention, as will appear and ef?cient means for quickly and ‘accurately
35 from the foregoing are to provide practical and determining the level‘ of separation between the 35
‘efficient means and method for accurately deter- oil and the waxy layers and the means for with
mining the different levels in a pressure settling drawing the oil down to the waxy layer.
vessel and for effecting the removal of the selectIn the illustration, the Swing line is shown as a
ed layer or layers.
horizontally extending pipe 68, rotatably mount
These broad objects and others of a more spe- ed in a Pressure Stuffing bOX 69, substantially at 40
cific nature are attained in this invention by the the center of the end heed'of the tank and having
novel method of operation, features of construc- an angled inner end Portion 53', terminating in
tion, combinations and relations of parts, as here- I a take-Off Spout 70» and its Outer end rotatably .
inafter described, illustrated in the‘ accompany- coupled at 1|, to the Stationary take-01f line‘ 34.
45 ing drawing and broadly covered in the claims.
The sample line is indicated at 12. carried by 45
The drawing accompanying and forming part‘ - or. incorporated in the swing line and as having
of the speci?cation shows by way of illustration a e valved discharge at 13, at the outer end. out
typical embodiment of the invention, it being
realized that the structure may be modi?ed in
50 various ways all within the true intent and broad
scope of the invention.
Side the talnk-
‘ -
The (HT-take $190111; 10 is Shown in Fig. 3 as
thinned down towarda plane substantially radial 50
to the axis of rotation of the swing line to pro
Fig. 1 is a broken side elevation, partly in sec— Vide a narrow inlet, which will be substantially
tion showing the invention applied to' a chilling , parallel. with all different levels of liquid, en
and settling tank.
Fig. 2 is a broken end elevation of the same.
abling a more, or less ?ne discrimination in all
. liquid level adjustments. This thinned spout is 55
illustrated as widened along the axis parallel to
the axis of rotation, to give it the full capacity of
the pipe. The sample line is indicated as ter
minating centrally of the mouth of the spout, so
as to take an accurate sample right at the center
of the inlet to the swing line.
A hand lever or levers such as indicated at 14,
14', may be provided on the outer portion of the
swing line and suitable securing means may be
10 provided such as the screw ‘clamp 15, cooperable
with the quadrant 16. The handle or handles 14,
14', serve both as means for adjusting and secur
invention may be employed for various other.
settling operations, especially those involving re
moval of a liquid layer from above settled solids
or semi-solids or from other immiscible liquids
heavier than the top layer or layers.
By mounting the rotatable swing line hori
zontally and substantially at the center of~ the
tank and by arranging the same for a substan
tially complete rotation, the tank contents may
be taken o? from any level and from any por 10
tion of the tank. This is so because of the ‘fact
that the inlet mouth ‘of the swing line ,can be
made to sweep the entire peripheral portion of
the tank.
ing the swing line and in conjunction with the
quadrant, or the ‘tank itself, as indicators for
showing the position of the swing line within the
.What is claimed is:
. .
tank. The quadrant, if desired, may be laid off
1. In combinationwith a closed horizontally
in suitable indications of angle, height, volume extending pressure settling tank, a pressure stu?
'. or other values. The lower lever handle ‘I4’ is ing box substantially centrally disposed in the
shown as extending in the same direction and end of said tank, a horizontally extending swing
20 terminating in line with the inlet mouth of the
pipe entered in said tank and rotatable in said
swing line within the tank, so as to provide at the pressure stu?lng box, said swing pipe having an
outside of the tank an actual visual counterpart angularly projecting extension within the tank
of .the swinging inlet within the tank. ‘
and terminating in an inlet mouth, a stationary
The swing line is shown as equipped with valve draw-cit pipe outside the tank, a swivel coupling
25 11, the stationary draw-off line 34, with valve 18, between said draw-off pipe and the horizontal CR
and the sample line with valve 13f by which these portion of the swing pipe, means for rotating '
lines may be properly controlled.
said horizontal portion of the swing pipe to locate
With the construction and arrangement shown, the inlet mouth at di?erent levels in the tank,
the character of the material at any level in the ‘ valve means for controlling ?ow through the
tank can be quickly determined by withdrawing swing pipe and a valved sample line carried by 30
a sample after the swing line has been set at such ‘and adjustable with said swing pipe and having
level. When a suitable point of withdrawal has an inlet at the mouth of theswing pipe and a
been determined, as by observation of‘ samples, valved outlet ‘outside the tank.
2. In combination with ‘a pressure settling
the‘ swing line may be de?nitely secured as by the
. clamp 15, and the contents of the tank above that chamber, a swing pipe rotatably entered in said
level removed through line 34, after opening I settling chamber and terminating in a withdrawal
valves 11 and ‘I8.
spout inside said chamber and a sample line car- '
In the dewaxing and partial decolorizing proc
ess referred to, after the settling tank has been
40 “pressured off” for about one hour, the swing'linev
isset at about'the middle of the tank and a small
ried by said swing pipe having an inlet substan
tially at the mouth of said withdrawal spout and
a valved discharge outside the chamber and in 40
dependent of said swing pipe.
3. In combination with a pressure settling
sample taken by the sample line. Ususally at
this time, the waxy layer-has settled below the ' chamber, a swing line rotatably mounted and hav
center of the tank. If it has settled below.\the ing a withdrawal spout within the chamber and
. ?rst setting of the swing line, the sample will be
' a clear bright ‘solution. 11' it has not settled be
low this setting, the ‘sample will be a dark waxy
mixture. As the first setting near the central
a handle for rotating said swing line outside the
chamber, said handle projecting angularly from __
the center of rotation of said :swing line, a sector
over which said handle operates and clamp means ‘
" level of the tank will usually show the wax layer _ between said handle and sector ior securing said.
has settled below that point, the sample line ‘I3’ handle in various-angular positions with respect
may be left partly open and the swing line be to said sector.
slowly lowered until the sample stream changes
4. In combination, V a horizontally extending
from the clear bright solution to the dark waxy rotatably supported swing pipe, having an angu
stream. The swing line may then be set at this lar extension terminating in an inlet mouth and
latter position representing the top ofthe waxy ‘.1. sample line carried by said angular extension
of said horizontally extending rotatably support
layer at that time. In the same manner, the loca
ed swing pipe and having an inlet at the mouth
tion of the top of the waxy layermay be deter
mined, say at 15 minute intervals. ‘ The location‘ 1 of said swing pipe.
of the top of the waxy layer may thus be followed ' 5. In combination with a tank, a horizontally
down through the tank during the whole settling journalled withdrawal pipe having an angular ex 60
period. When the. top of.the‘.waxy layer has tension terminating in an inlet mouth within the
failed to drop further ‘for two consecutive 15 tank, a smaller sample line extending ‘from said
‘ minute intervals, the settling may be considered
as ?nished and complete. The swing line may
65 then be clamped in position and the oily layer
above the location of the swing line inlet be forced
or “pumped out through line 34, with valv'es ‘I1
and 18
The invention enables the exact locating 'of
70 the top of .-the waxy layer, so much so that a vari
ation of 1/," in vertical location of the swing line
inlet will show a ‘distinct separation between the
oily and waxy layers.
While of particular value for the settling oper
75 ations disclosed, it will be understood that the
inlet - mouth through said withdrawal pipe be
yond the supporting bearing for- the latter and a
valved discharge outlet for thelsample line open-_ 65
ing through the side of the rotatably supported
withdrawal ‘pipe at a point beyond the bearing
for the. pipe and. provided at said extended point
with a controllable sample- discharging outlet. '
6. The herein disclosed method of settling and 70
decanting which comprises combining‘ a small
sample line with a movable off-take pipe so that
said sample line will move with and be positioned
by said off-take pipe, gradually lowering said pipe
in the materialzqbeing' settled and taking samples 75
, 3
2,113,009 .
through said sample line at each stage of lower
material through said oil-take pipe from such
ing until a point is reached where .the samples so "
taken indicate that settling has been su?iciently
8. In combination with a tank, a substantially
completed and then securing said off-take pipe ' horizontalbearing carried thereby, a swing‘ pipe
and withdrawing the material through the off
having a substantially horizontal portion jour- ' '
take pipe at such level.
naled in said bearing and an angularly project
ing portion within the tank and terminating in
an inlet mouth, a stationary pipe in line with
the substantially horizontally journaled portion
of said swing pipe, a swivel coupling between said
stationary pipe and ‘said substantially horizontal
7. The herein disclosed method of ‘settling ma
terials in a closed pressure vessel and decanting
the settled material therefrom, which comprises
10 combining a sample line with an off-take pipe by
mounting the sample line on the o?-take pipe
and movably supporting the o?-take pipe with
in the pressure vessel so that said off-take and‘
sample 'line may be simultaneously shifted to
15 di?erent levels of take-o? in said tank, gradually
lowering the combined off-take and sample line
portion of said swing pipe, a sampling tube car
ried by said swing pipe having an inlet in the
region ofthe inlet mouth of said swing pipe, said
sampling tube extending through the substan
tially horizontally journaled portion of said swing
pipe and having an outlet between said horizontal
bearing and the swivel coupling and valve means
levels and then after samples so taken indicate _ outside the tank for independently controlling
through the material being settled and withdraw
ing samples through said sample line at di?erent
20 that settling is completed, leaving the off-take
pipe at such level and withdrawing the settled
said sampling tube and said swing pipe.
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