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Патент USA US2107265

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Feb. 8, 1938.
F. M. ARCHIBALD
2,107,265
PROCESS OF PURIFYING ALCOHOLS BY REMOVING THE OILY IMPURITIES
Filed NOV. 20, 1934
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Patented Feb.
1938
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3 2,107,265 _
UNITED STATES l’ATENT' oFFicE "
PROCESS OF PURIFYING ALCOHOLS BY
'
REMOVING THE OILY IIVIPURITIES
N. in, assighoi- '
Francis M. Archibald, Elizabeth,
‘
to Standard Alcohol
Co.
’ Application November 20, 1934, Serial No. 753,807
\
4 Claims.
(or.
202-767)
‘
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.
he
The invention relates to a process of purifying ' tionating coluninl2. The petroleum oil may be
alcohols and relates particularly to the removal passed onto any plate which is above the plate
of oily impurities, especially the oily impurities on which the crude alcohol is introduced, though‘
most e?’e'ctive results wereobtained by passing
that boil in the same range as the alcohols.
5
When alcohols are ?rst produced by a process
in which unsaturated hydrocarbons, such as
ethylene, propylene, and the like, are combined
. with sulfuric acid, the esters hydrolyzed by
onto the fourth plate.‘ The vapors of the alcohol. 5
passing upwardly through the fractionating col
umn 2 are brought into contact with the liquid
petroleum oil passing'downwardly in counter
current to the alcohol vapors and thereby the
alcohols are freed of any oil-soluble impurities. 10
The vapors are passed from the fractionating
column 2 through pipe I I and condensed in con
ary and tertiary alcohols produced from unsatu- ' denser l2. Pipe I3 is provided for returning a
re?ux of liquid alcohol from the container l4
rated compounds, there are present, besides ole
l-i ?nes, ethers and higher alcohols as well as sulfur into which the condensed alcohol is emptied from 15
compounds of unknown structure. In Patent No. condenser l2 through pipe §|5 to regulate the
temperature in the upper part of the fractionat
1,712,475 issued May 7, 1929, to H. E. Buc, a proc
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Y
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ess of purifying alcohols is described in which ing column 2. "
Any liquid accumulating in the lower part of
the alcohol isgdiluted with water, agitated a num
20 her of times with di?erent portions of a highly fractionating‘ column 2 is removed both from 20
re?ned petroleum oil, the oil separated after each ,, above the lower plate _ l6 and from .’the lower
means of water and alcohols distilled off, they
10 usually carry persistent odors foreign to the alco
hols proper. The nature of the impurities varies
and is not always known. In the case of second
agitation and ?nally the separated alcohol dis
tilled.
‘
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'_
This invention relates to improvements in the
25 process of puri?cation of alcohol disclosed in
the above patent.
In the process referred to
above, the alcohols are diluted before treating
with highly re?ned petroleum oils; no dilution
is required in this process withthe following re
30 distillation to reconcentrate the alcohols. By this
invention the hot vapors of alcohols may be taken
directly from the still where they have been pro-\
duced and puri?ed before condensing.
The accompanying drawing illustrates an ap
part of fractionating column 2 through pipes I‘!
to decanter l8.' In decanter 18 the liquid sepa
rates into two layers: an aqueous layer which is
discarded through pipe l9 'to the sewer and an 25
oil layer. The oil layer is passed through pipe
20 by means of pump 2| to an upper part of_ strip
ping column 22. Stripping column 22 may be
\provided with plates and bubble’ caps or may be
a packed tower. Steam is provided to the lower 30,
part of the stripping column 22 in the formof
;a spray through pipe 23 and spray nozzle-24.
The steam passing upwardly in countercurrent
relation to the petroleum oil passing downwardly
removes all the lower boiling compounds. The 35
petroleum oil stripped of its lower ‘boiling com
pounds is passed by means of pump 25 through
“pipe 26 and cooler 21 to pipe 9 and fractionating
column 2. The steam with the lower boiling oily
40 line in sulfuric acid, followed by hydrolysis and» compounds passes through pipe 28through con-_ 40 ‘
distillation, is passed through‘ pipe I into afrac _ denser 29 to container 30. In the container 30
tionating column 2 provided with plates 3 hav
the lower boiling oily compounds and steam, both
ing bubble caps 4. It is preferred to pass the condensed to liquid oil and water, separate into
alcohol onto the ?fth plate 5 ‘from the top, layers. The water layer is removed through pipe
45 though it may be passed onto other plates of 3| to‘ the sewer-and the oil layer is removed 45
the fractionating column 2. A steam coil 6 with through pipe 32 to be used as fuel.
'
inlet 1 and outlet 8 is provided in the lower por
The highly re?ned, substantially odorless pe
tion of the fractionating column 2, supplying troleum oil may be used continuously in this
heat to vaporize and keep the alcohol in the form process with very little addition of oil. The alco- 50
so of a vapor in the upper portion of the fractionat
ing column. Highly re?ned, odorless petroleum ’hol is puri?ed in one step without dilution and
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oil of about 570° to 580° F.'initial boiling point a number of distillations.
It is not intended that the invention be limited
and having a Saybolt viscosity of around 205'to
215 seconds at 100° F. is passed through pipe 9 to the certain speci?c embodiments shown but in
55 onto the fourth plate Hi from the top of the frac- , the appended claims it is intended to claim all in- ‘55 i
35 paratus that is appropriatev for the practice of
this process, although the successful application
of the process is not dependent on using this
exact apparatus.
Alcohol, prepared by the absorption of an ole-'
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2,107,265
herent novelty in the invention vas broadly as the
I
prior art permits.
_
I claim:
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1. In a process of purifying alcohols derived
100° F., separating the vapor of the alcohol from
the liquid petroleum oil and separately condens
ing the alcohol vapors after contacting with said
petroleum‘oil.
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A
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from unsaturated hydrocarbons and containing
v"3. In a process of purifying alcohols derived
oily impurities in solution by removing the oily
impurities, the improvement which comprises
from unsaturated hydrocarbons and containing
passing vapors of an alcohol containing oily im
purities in counter-current ?ow with a liquid
10 highly‘ refined petroleum oil, separating the va
pors of the alcohol from the liquid petroleum oil
' and condensing the vapors of the alcohol sepa
rately.
.
2. In a process of purifying alcohols derived
II from unsaturated hydrocarbons and containing
oily impurities in solution by removing the oily
impurities, the improvement which comprises‘
passing vapors of an alcohol containing oily im
‘ purities in countercurrent ?ow with a liquid
colorless, odorless petroleum oil of about 570° to
580° F. initial boiling point and having a Say
bolt viscosity ‘of around 205 to 215 seconds‘ at
oily impurities in solution by removing the oily
impurities, the improvement which comprises
passing the vapors of an alcohol containing oily
impurities in countercurrent ?ow with a liquid 10
highly re?ned petroleum oil, separating the alco
hol vapors and the liquid highly refined pe
troleum oil, condensing the alcohol vapors and
subjecting the liquid highly re?ned petroleum oil
to heat to vaporize the impurities removed from
the alcohol.
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4. In a process according to claim 3 in which‘
the liquid highly re?ned petroleum oil is used
again in the process after freeing of impurities
removed from the alcohol:
20
FRANCIS M.‘ ARCHIBALD.
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