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1. WO1996005902 - LIQUID-LIQUID EXTRACTION

Publication Number WO/1996/005902
Publication Date 29.02.1996
International Application No. PCT/GB1995/002003
International Filing Date 23.08.1995
Chapter 2 Demand Filed 20.03.1996
IPC
B01D 11/04 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
11Solvent extraction
04of solutions which are liquid
G01N 25/14 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
25Investigating or analysing materials by the use of thermal means
14by using distillation, extraction, sublimation, condensation, freezing, or crystallisation
CPC
B01D 11/0415
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
11Solvent extraction
04of solutions which are liquid
0415in combination with membranes
B01D 11/048
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
11Solvent extraction
04of solutions which are liquid
0476Moving receptacles, e.g. rotating receptacles
048Mixing by counter-current streams provoked by centrifugal force, in rotating coils or in other rotating spaces
G01N 25/14
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
25Investigating or analyzing materials by the use of thermal means
14by using distillation, extraction, sublimation, condensation, freezing, or crystallisation
Y10T 436/255
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
436Chemistry: analytical and immunological testing
25including sample preparation
25375Liberation or purification of sample or separation of material from a sample [e.g., filtering, centrifuging, etc.]
255including use of a solid sorbent, semipermeable membrane, or liquid extraction
Applicants
  • BATES, John [GB/GB]; GB
  • EDWARDS, John, David [GB/GB]; GB
Inventors
  • BATES, John; GB
  • EDWARDS, John, David; GB
Agents
  • STEVENS, HEWLETT & PERKINS; 1 Serjeants' Inn Fleet Street London EC4Y 1LL, GB
Priority Data
9417014.923.08.1994GB
9500321.609.01.1995GB
9503114.217.02.1995GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) LIQUID-LIQUID EXTRACTION
(FR) EXTRACTION LIQUIDE-LIQUIDE
Abstract
(EN)
Method/apparatus for extracting substance (60) from carrier liquid (50) in first container (10) into an immiscible extraction liquid (40) of different density in second container (20, 120) receiving and locating (22, 11) the first (10). Substance transfers to extraction liquid (40) at liquids admixture (40') in second container (20, 120) aided by flow control (13) and fine division (95) of carrier liquid (50) force-supplied into extraction liquid (40). Separated liquids (40'', 50'') receive separator member (30, 130) cooperating with second container (20, 120) as physical barrier with only separated extraction liquid (40'', 140'') and acquired substance (60) at one side. Centrifuging produces three-stage dividing flow (91, 93, 95) of carrier liquid on the second container wall (222). Moulded parts (10, 20, 30) suit single use in centrifuge (40).
(FR)
L'invention concerne un appareil et un procédé pour transférer une substance (60) contenue dans un liquide vecteur (50) disposé dans un premier récipient (10), vers un liquide d'extraction (40) non miscible et d'une densité différente, se trouvant dans un second récipient (20, 120) recevant et positionnant (22, 11) le premier (10). La substance est transférée vers le liquide d'extraction (40) pour former un mélange (40') dans le second récipient (20, 120), aidée en cela par un système régulateur de débit (13) et un système (95) permettant de diviser finement le liquide vecteur (50) et de l'introduire sous pression dans le liquide d'extraction (40). Les liquides (40', 50') séparés sont maintenus à l'état séparé par un élément séparateur (30, 130) coopérant avec le second récipient (20, 120) et agissant comme une barrière physique pour que seuls le liquide d'extraction séparé (40', 140') et la substance extraite (60) se trouvent d'un côté de la barrière. Un procédé de centrifugation divise l'écoulement du liquide vecteur en trois niveaux (91, 93, 95) sur la paroi (222) du second récipient. On peut utiliser dans la centrifugeuse (40) des éléments (10, 20, 30) à usage unique obtenus par moulage.
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