DE1767121A1 - Process and exchange column for carrying out countercurrent exchanges between two liquid phases under pressure pulsation - Google Patents

Description

iat a 1 "'Energie Atoaique in Pariah / France

Yerfakren und Ausauseh & olonne jsur carrying out counter-Btromat'ataiiachon Bv; ia <2h there are two liquid phases

Bruokpulierung

The invention relates to a method for carrying out counter Stroctexchange between two liquid phases as well as one Countercurrent exchange column to carry out this or one corresponding procedure.

The invention particularly relates to pulsed exchange columns, i.e. columns in which the two flowed through in countercurrent » subject to periodic pressure fluctuations in the fluid phases aind.

The invention aims to improve efficiency such sweat colomies and, moreover, in one preferred one Execution form, their image ala vertically one above the other

109887 / U87

BATH ORIGINAL

As is well known, the low efficiency of the usual counter = electricity exchange signals, especially the pulsed columns, to a considerable height of the theoretical floor, which is why one often prefers them to decanting smell batteries in which the two Phases are mixed alternately with stirring and separated from one another by settling.

Until now, such decanting mixers always had to be placed horizontally Arrange row. Attempts have been made to carry out a corresponding work method in rows of chambers arranged perpendicular to one another, but it has never been possible to achieve a stable operating state Deposition can be achieved in certain chambers.

However, the horizontal row arrangement has in practice considerable disadvantages, in particular the considerable space required, the mechanically complex structure and the large size Dead volume as a result of the connection lines leading from one stage to the next for the two phases. Another disadvantage lies in the irregularity of the upper course of the phases, which is very sensitive to their nature and physical. Properties reigns.

According to the invention, a Method for performing a countercurrent exchange between two! proposed liquid phases in an exchange column under pressure pulsation, which is characterized by the fact that both Phases alternate periodically each time during a time that corresponds to an integer number of pressure pulses, further conveyed will.

109887 / U87 ORIGINAL BATHROOM

According to a preferred embodiment of the process, the two phases in the exchange column pass through a leg of alternating mixing and door stages.

According to the invention, a counterpart exchange column which can work as a vertical anchorage unit is also proposed, which WTä er devices sun? Erseugwtig einee counter-currents of the two liquid bubbles in a series of successive chambers, δ ie £ u? C! I B8 £ 's Kit holes ssary making the connection sueior besisachbarter KaEKsesn beg.rei? Zt are? "rfoijsi siföite ßei 'aufeiRaRö« rfolgesd «n Κβ ^ λλ ^ ι-ά rait lifüirvorarichtuiragen Stsrcbmisohen the two phases are" devices for pulsing the pressure and gate direction interruption in the chambers "gen of the circle on each of the two phases.

In the following, as an example _t otee B- & grewsu2ig _t a special ÄUiif »" hi ^r v5 ^ g6foj? Ai öea örfiyißuisgsgenä. ^ AH Vfii'falir ^ rs as well as ciiae der erfiinungegsKiäSen AtS3tauctikolofs: ~ men ) Ie .Description * Attention is drawn to the attached single figure _e vjelche a proper cut of this exchange liqueur.

The specified ÄMat-Ausciiltnlomie tUents g

Eiviachen E * «; in liquid phases and works as a vertical Be

kantiermiachisr. It consists of tma one. Polga

109887 / U87 BAD ORIGINAU

delimited by the cylindrical wall of the column and by booths 6 "Each of the trays is provided with two bores 7" whereby the adjacent chambers are in communication with one another.

In the particular case under consideration, the exchange column is used for the countercurrent exchange of a conductive phase consisting of an organic solvent and an aqueous phase as the heavier phase. The light phase rises in the column , while the heavy phase drops. The lowest chamber 1 is therefore connected to a feed line Θ of the organic phase and an outlet line 9 of the aqueous plasmas. Conversely, the uppermost chamber 11 has an insulation 10 of the aqueous phase and, at the top of the column, an outlet line 12 of the organic phase.

A vertical drive shaft 14 is guided through the various booths 6. It is held by a bearing 15 which is provided in an intermediate floor 16 which separates the chamber 1 into two compartments. At its lower end it carries a flywheel magnet 18, whereby it is driven by a motor not shown via a magnetic coupling through the tiche column bottom 19 therethrough while ensuring a perfect tightness of the column

The W _e lle H deceptive in intervals corresponding to twice the height of a chamber, agitating blades 20 consecutive From two chambers is aleo each provided with a stirring blades such that 14 cause a mixing of the phases during rotation of the shaft.

109887 / U87

BATH ORIGINAL

Ια operation pass through the two phases in the column progressively alternating chambers 2,4 etc., in which they pass through a For emulsion formation brought into close contact with stirring are (mixing stages) jimd chambers 1,3 uow., in which no stirring takes place and they separate from each other by settling (decanter stages)

The feed line 8 of the organic one leading into the lowest camera 1 Phase is also with a conventional pulsing device 22 before «»

in
bound, which / the Ausausohkoloame causes periodic pressure fluctuations. This device generally uses compressed air or an inert gas.

The two phases are conveyed by the pump 23, for example, located on the feed line 8 of the organic phase. the pump 24 located on the feed line 10 of the aqueous phase. Furthermore, the feed lines and outlet lines 8, 9, 10 and 12 for the inlet and outlet of each phase into the column are all provided with valves 25, 26, 27, 28, whereby the flow of each phase can be interrupted for a certain period of time »

The use of the above-described exchange according to the invention » column takes place in such a way that one or the other of the phases is allowed to flow through periodically in a shifting manner. To this end are alternately ι

a) The valves 25 and 28 for the inlet and outlet of the organic Phase open while valves 26 and 27 for the inlet and outlet of the aqueous phase remain closed;

109887 / 148.7 BAD ORJQJNAL

b) the valves 26 and 27 of the aqueous phase are opened and at the same time the valves 25 and 28 are closed.

The pulsation rhythm of the pulsation device 22 is synchronized with the periodic supply of the phases. The duration of each phase corresponds to a whole series of pulses, generally speaking simply a complete pulse. These pressure pulses enable the exercise of inertia, which is caused by the fact that oils in both phases flow through the same openings from one to the next.

The above-described experience ensures a high degree of effectiveness for foreign colosms. The height of the theoretical floor is so low, for example 4 cm.

The "decanters" and "Mi3cb.utwfen" retain their individual work instructions over the course of time, since the two phases alternate periodically. Buckets of certain inflow volumes of a phase often correspond to an equal flow volume of this phase over the entire autowell column, regardless of the density, viscosity, etc. of the liquid. In this way , irrespective of the type and degree of flow of each phase, the size of the liquids in each decanting stage is at the same level. Only the pressure pulp leads to changes in the height of this boundary layer, which, however, remains constant between two definite points of value. A continuous supply of the two phases would result in a gradual shift in the

the height of the limit of the liquids lead / from a bur »

109887 / U87

BAD0RK3Ä ^

whose chamber would continue to run, and the individual working methods of the Mixing and edging levels could not be maintained.

For the pail of an existing exchange column with two secondary stages H ₁ , Hg and three decanting _{stages D 1} , D ₂ * D * with a throughput of light bubble and aqueous phase of V each and one half of light and half of heavy phase together « When the emulsion is set in the mixing stages, the air flow exchanges between the various stages are shown in tabular form, namely Table 1 for operation of the exchange column without a pulsation device and 5 all 2 for operation with a pulsation device.

A comparison of these cases shows that

a) without a pulsation device, decanting level 1 for everyone

complete cycle (supply of light phase, to «·

The heavy phase was depleted by a volume of the heavy phase while the decanting stage 3 depleted the light phase emerges from the light and heavy phase.

b) with pulsing device these impoverishments no longer occur! The displacements of the solution shown in Table 2 under the sole effect of the Pwlsieruag show an impoverishment in the opposite sense as the example without the PulaAernngvorrichtung. By "superimposing this pulsation on the supply of the phases", the two impoverishments are canceled out, and the ohms contain an equal volume of light and heavy phase after each complete cycle.

109887 / U87 BAD ORIGINAL

Tabel

Exchange of solutions between the different levels

Feeding the light phase step Exchange on
easy phase Exchange on
severe bladder Introduction of the heavy phase Exchange on
difficult phase 0 Exchange, on
easy phase + 0.5Y ^ ₀₅ V
-. 1.0 V ^{Q>!> V} M ₁ ^{+ 7} * 0 * 5 V
- 0.5V - 0, -5 Y * 0.5V - ° ^{5 V} + 0.5 Y
+ no γ D ₂ - 11 Y ^Οϊί> * ■ * 0.5 Y + 0.5 Y K ₂ ; ^ ^{5 Y} + o, 5 γ ~ 0.5 Y * 0.5 Y - 1.0 Y ^{Oi5 T} ■ ♦ 0.5 Y -0.5V + 1.0 Y ₀
- no ν ° 0

Balance of the levels (columns 1 ί- 3 for the easy phase and 2 M for the difficult phase) * 0 except for S ₁ * +0.5 Y in the light phase, - 0.5 Y in the difficult phase

D, «-0.5 V on the light phase, + 0.5 V on the heavy phase

step

fork 2
Exchange of solutions in the event of a pulsation (back-to-back)

Pulsation is superimposed on the supply of the lighter phase

Exchange at an easy phase

Exchange on

heavy phase pulsation superimposed on the feed

the difficult phase

Exchange on

lighter Piia

Exchange on difficult phase

R -1.0 T

'

0.5

0.5 Y

0.5

5 Y 0.5V

• f 0.5 Y) - 1 ₈ 0 V) + 0.5 Y)

4- 1.0 Y>

- 0.5 Τ} 05 Y

- 0.5 Y)

ο 1.0 Y) C

- 0.5 V}

■ Ϊ- 0.5

Balance sheet

0-5 Y a Ii i chi; he

0 _v 5 Y as

G _S 5 Y öi difficult phase

ίο Ί 767121

The submerged column described has, inter alia, the

the following main advantages:

Silky base;

Tightness, which makes them both under overpressure as well as underpressure

can be operated in relation to the environment; Simple mechanical structure;

Possible training in the micro-saassotab for GegenotfOrnextraktionen

under single oats of low product quantities; Proprietary for an implementation in the technical Matfatab;

Eliminate dso fünflv.asöfj physical factors on the

Ihmjlil ^ yf der FlüiSüi gk. *} ± tti3i -.mä the Binatellvrag of the height

the phases of e
To others, when the AuntauiJclikoloiiiTie stands still, and the
It is easy to regulate the work of the motorcade, since you have a lot of freedom in the choice of the operating conditions, as the volume and the passage side of each of the phases can be determined separately.

An exchange column corresponding to the above-mentioned exchange column with eleven vertically arranged columns was used in particular for the following purposes. This Auetaunoh column was made by sw ©! fed by piston pumps driven by Synohroranomotors * The motors operated simultaneously with the fast piston movement causing the piston to move parts of the porridge-way cock, one of which was open during a half-turn, while the other two ways
were closed. The two were at a half-turn

109887 / U87

BAD ORiölNAL

other ways open, while one way was closed . This one way made it possible to fill the piston pump, while of the two other ways one made it possible to pass the solution from the pump srtir A ₁ ^ st to the oh column and the other made it possible to flow out of the column. These two pumps, as well as the dosing device driven by a synchronous motor with twice the speed of rotation as that of the pumps, were connected via the same switch.

Beis piel 1

Extraction of plutonium present in a nitric acid solution

by an organic solvent Aqueous phase HIfO “1 H

Γη (IV) 200 mg / l

Phase t 0 _t 08 M solution of

in Jkxlecan aerjarganic phase, "ο 1?" 5

Extraktioii9 & T? .Sfceut «: 995 ^ e. was- eisiem effect & ßgsgraä per level of

over 9Oj6.

Farmer> ler EiDöpeiowng each phase 30 sec.

Flow rate of organic phase 7 ml / hour » Surohftass in the aqueous phase 56 ml / hour.

15 sec.

Beispi el 2

SUok «3ctre.1»: t5 on «aijiej? organic flint solution. Organ! Ecls « Mmm-gt 0.03 M SrilauryXeümonitaraitrat in dodecane

₄ 0.5 B

0.05 H.

109887 / U87

BATH ORIGINAL

Flow of the organic phase _β ItarcKflSSHger "aqueous JPüaee °

Auefeeute of the back extraction: 99t 9 ^ »ie one efficiency per

Level over $ 90

Feeding time of each bias 30 sec.

ge of the organic phase: 56 ml / hour. Phase 7 ml / hour 15 sec.

The EvSinftw-.z is, of course, not based on the above-mentioned Beacliräsikt, but also includes modifications of all such, for the exchange column

several supply lines for one and / or the other of the phases

ηηά / cüQF owns several / aaalaßleituragen. In this case, all 2iü. © iti3iAgen and unloading lines of one and the same phase are open at the same time.

109887 / U87

BATH ORIGINAL

Claims (3)

- 13 claims 1.) Method for carrying out a blessing irotoauetexches between two liquid phases in an exchange column under pressure pulsation, characterized in that the two phases are alternately and periodically conveyed further during a time ₉ which corresponds to an integer number of pressure pulsations. 2.) The method according to claim 1, characterized in that the alternate both phases in the exchange column by a series ^ the mixing and separation stages are carried out 3.) Exchange column, in particular for carrying out the process according to claim 1 or 2, characterized by conveying devices, which the two liquid phases in the counter-atom by a A series of chambers lead through floors (6) with holes (7) for connecting two consecutive chambers are limited, with one of two consecutive chambers nlt Mixing devices (20) for mixing the two phases see 1st, as well as · further characterized by a pulsation device (22) for pulsing the in the chambers Pressure and valves (25,26,27,28) for alternating interruption d ·· Flows through each of the Ρη * ·· η. 109887 / U87
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