US3460914A - Liquid-liquid extraction - Google Patents

Liquid-liquid extraction Download PDF

Info

Publication number
US3460914A
US3460914A US495609A US3460914DA US3460914A US 3460914 A US3460914 A US 3460914A US 495609 A US495609 A US 495609A US 3460914D A US3460914D A US 3460914DA US 3460914 A US3460914 A US 3460914A
Authority
US
United States
Prior art keywords
liquid
cells
cell
extraction
vertical axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US495609A
Other languages
English (en)
Inventor
Peter Ridgway Watt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vitamins Ltd
Original Assignee
Vitamins Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vitamins Ltd filed Critical Vitamins Ltd
Application granted granted Critical
Publication of US3460914A publication Critical patent/US3460914A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D11/00—Solvent extraction
    • B01D11/04—Solvent extraction of solutions which are liquid
    • B01D11/0476—Moving receptacles, e.g. rotating receptacles
    • B01D11/048—Mixing by counter-current streams provoked by centrifugal force, in rotating coils or in other rotating spaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D11/00—Solvent extraction
    • B01D11/04—Solvent extraction of solutions which are liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D11/00—Solvent extraction
    • B01D11/04—Solvent extraction of solutions which are liquid
    • B01D11/0426—Counter-current multistage extraction towers in a vertical or sloping position
    • B01D11/043—Counter-current multistage extraction towers in a vertical or sloping position with stationary contacting elements, sieve plates or loose contacting elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D11/00—Solvent extraction
    • B01D11/04—Solvent extraction of solutions which are liquid
    • B01D11/0426—Counter-current multistage extraction towers in a vertical or sloping position
    • B01D11/0434—Counter-current multistage extraction towers in a vertical or sloping position comprising rotating mechanisms, e.g. mixers, rotational oscillating motion, mixing pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D11/00—Solvent extraction
    • B01D11/04—Solvent extraction of solutions which are liquid
    • B01D11/0476—Moving receptacles, e.g. rotating receptacles

Definitions

  • a liquid-liquid extractor consists of a number of annular cells rotatable about a common vertical axis, so that two immiscible liquids rotated therein form inner and outer annular layers.
  • Each cell has associated with it a U-shaped pipe fixed upon a vertical spindle parallel to and offset from the vertical axis of the cells. Rotation of the spindle causes the pipes to enter the respective cells and so scoop in the inner layers of liquid, each portion of the inner layer flowing along the U-shaped pipe to the next lower cell.
  • the cells are arranged so that each can still hold its contents when rotation ceases and the apparatus is at rest.
  • This invention relates to liquid-liquid extraction and concerns, in particular, improvements in apparatus for use in carrying out extraction processes using immiscible liquids.
  • a liquidliquid extraction apparatus includes at least one annular cell arranged to undergo rotation about a vertical axis so as to effect centrifugal separation of liquids therein in the form of layers against the outer part of the cell, the lower part of the cell being arranged to contain the liquid charge for the cell when the apparatu is at rest, and scoop means for collecting one of the layers from the cell being arranged to enter such cell by movement of its inlet end in a plane normal to the vertical axis.
  • the scoop means comprises a cranked pipe associated with two consecutive cells arranged to transfer liquid collected from the upper one of such cells directly and under gravity to the lower cell.
  • FIGURE 1 shows a diagrammatic and fragmentary vertical section of one form of apparatus.
  • FIGURE 2 shows an alternative form of outer assembly.
  • the outer tube which is divided by internal annular divisions to form a plurality of cells is shown at 10. This is arranged to rotate about a vertical axis 11, for instance in the direction of the arrow 12.
  • the partitions provided inside the tube 10 consist of equally-spaced annular plates or rings 13 and contrast with those shown for instance at 11 in FIGURE 9 of the drawings of British Patent No. 998,646 in that short upstanding rims 14, which may be inwardly coned, if desired, are provided on the inner edges of the rings 13.
  • This arrangement of the tube 10 requires the use of a transfer unit assembly so arranged that the inlet ends of the collector pipes move into the corresponding cells, i.e., move between adjacent rings 13 and, necessarily above the rims 14, in a plane which is normal to the axis 11.
  • This can be conveniently achieved by mounting the transfer units for rotation about a vertical axis 15, for instance in the direction shown by the arrow 16, the axis 15 being offset relative to the tube axis 11.
  • the assembly consists of an upright spindle 17 driven in a manner not shown, for instance through suitable gearing or belt drives from the motor which also drives the tube 10, and carrying a plurality of lateral arms 18.
  • Each arm 18 supports a cranked pipe comprising a collector leg 19 and a discharge leg 20 and arranged so that the legs 19 and 20, in rotating about the axis 15, pass respectively above and below one of the rings 13. As this occurs, the inner layer of liquid is collected by the leg 19 and directed by the leg 20 into the next lower cell, i.e., under gravity.
  • the shaded area 21 and the dotted area 22 indicate the positions of the outer and inner layers as they are formed during the settling phase; the outer shaded area 23 indicates the position of the residual layer when the apparatus is at rest. It is highly desirable for the shaded areas 21 and 23 to be equal, in other words for the volume held by each ring 13 at rest to be sufiicient for the corresponding portion of the liquid charge.
  • the series of cells are formed by a stack of ring members 24 each furnishing a portion of cylindrical wall, shown at 25, and a portion of inwardly and upwardly inclined wall, shown at 26.
  • the two wall portions join at the upper edge of the ring member 24 and this may take the form of a step or shoulder 27; a corresponding step or shoulder 28 is then provided on the lower edge of each ring member 24 and the assembly is built up by mating the shoulders 27 and 28 together and, if necessary, completing the resultant sealed joint by the use of a suitable sealant, adhesive or jointing compound.
  • FIGURE 2 also illustrates the use of inclined lower cell rings, as opposed to the rimmed horizontal members shown in FIGURE 1. The areas 21, 22 and 23 occupied by the layers during operation and at rest are also shown.
  • FIGURE 1 The form of transfer assembly shown in FIGURE 1 is merely illustrative of the kinds which can be used and which are described in greater detail in application Ser. No. 495,610 of even date herewith, now abandoned, giving the advantage of gravity drainage during transfer.
  • a liquid-liquid extraction apparatus for use in carrying out extraction using two mutually immiscible liquids,

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Centrifugal Separators (AREA)
  • Extraction Or Liquid Replacement (AREA)
US495609A 1964-11-12 1965-10-13 Liquid-liquid extraction Expired - Lifetime US3460914A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB46173/64A GB1118202A (en) 1964-11-12 1964-11-12 Improvements in or relating to liquid-liquid extraction

Publications (1)

Publication Number Publication Date
US3460914A true US3460914A (en) 1969-08-12

Family

ID=10440158

Family Applications (1)

Application Number Title Priority Date Filing Date
US495609A Expired - Lifetime US3460914A (en) 1964-11-12 1965-10-13 Liquid-liquid extraction

Country Status (3)

Country Link
US (1) US3460914A (fr)
FR (3) FR1387688A (fr)
GB (3) GB998646A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE868872A (fr) 1977-07-11 1978-11-03 Nat Res Dev Procede pour faire contenir des phases liquides dans un recipient
FR2539047A1 (fr) * 1983-01-07 1984-07-13 Jourdan Philippe Appareil d'extraction liquide rotatif

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1353463A (en) * 1919-08-27 1920-09-21 Guy S Dyer Leaching-machine
US2036924A (en) * 1933-05-19 1936-04-07 Lambiotte Freres Ets Process and apparatus for the continuous extraction or treatment of liquids
US2734635A (en) * 1956-02-14 filtrate
US2894879A (en) * 1956-02-24 1959-07-14 Kenneth C D Hickman Multiple effect distillation
US3111393A (en) * 1959-09-03 1963-11-19 Edwin George Inman Continuous counter current extractor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734635A (en) * 1956-02-14 filtrate
US1353463A (en) * 1919-08-27 1920-09-21 Guy S Dyer Leaching-machine
US2036924A (en) * 1933-05-19 1936-04-07 Lambiotte Freres Ets Process and apparatus for the continuous extraction or treatment of liquids
US2894879A (en) * 1956-02-24 1959-07-14 Kenneth C D Hickman Multiple effect distillation
US3111393A (en) * 1959-09-03 1963-11-19 Edwin George Inman Continuous counter current extractor

Also Published As

Publication number Publication date
GB1118203A (en) 1968-06-26
FR1387688A (fr) 1965-01-29
FR1466387A (fr) 1967-01-20
GB998646A (en) 1965-07-21
FR1454199A (fr) 1966-07-22
GB1118202A (en) 1968-06-26

Similar Documents

Publication Publication Date Title
JPS631466A (ja) 遠心速抽出器
US4324661A (en) Apparatus and method for continuous countercurrent extraction and particle separation
US4824430A (en) High-speed centrifugal extractor having spiral liquid path
US3890101A (en) Collection ring for use in multiple-sample blood fractionation centrifugal rotors
US3460914A (en) Liquid-liquid extraction
CN102671427A (zh) 用于色谱层析装置的模拟移动床
US20090173680A1 (en) Continuous countercurrent chromatography system
US3811843A (en) Solvent deasphalting
US3649209A (en) Treatment of solids with liquids
US4786480A (en) Two-part fluid contactor
US4107041A (en) Electromatographic separating apparatus and system
GB1337398A (en) Apparatus and method for gradient zonal centrifugation
US3351273A (en) Honey extracting apparatus
US2292483A (en) Process and apparatus for concentrating solutions
CN113413635A (zh) 折流式逆流离心萃取机
US2684158A (en) Continuous horizontal rotary filter of the tilting cell type
USRE25186E (en) figure
GB2033244A (en) Solvent Extraction of Solids and Slurries
US5021158A (en) Process and apparatus for the separation of mixtures of substances
DE19634413A1 (de) Verfahren und Vorrichtung zur Sortierzentrifugation oder Sortierdurchflußzentrifugation
US3069074A (en) Separator assembly for separation of liquids
US1325298A (en) kestner
US4231992A (en) Three-phase counter-double-current apparatus
US3536453A (en) Apparatus for mass-transfer processes in liquid-liquid systems
SU441024A1 (ru) Экстрактор