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1. WO2000039029 - PRODUCTION OF CONCENTRATED CARBONATE SUSPENSIONS

Publication Number WO/2000/039029
Publication Date 06.07.2000
International Application No. PCT/GB1999/004249
International Filing Date 23.12.1999
Chapter 2 Demand Filed 21.07.2000
IPC
B01F 3/12 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
3Mixing, e.g. dispersing, emulsifying, according to the phases to be mixed
12liquids with solids
B01F 3/20 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
3Mixing, e.g. dispersing, emulsifying, according to the phases to be mixed
20Pretreatment of the materials to be mixed
C01F 11/18 2006.01
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
FCOMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE EARTH METALS
11Compounds of calcium, strontium, or barium
18Carbonates
CPC
B01F 3/1207
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
3Mixing, e.g. dispersing, emulsifying, according to the phases to be mixed
12liquids with solids
1207Methods
B01F 3/20
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
3Mixing, e.g. dispersing, emulsifying, according to the phases to be mixed
20Pretreatment of the materials to be mixed
B01F 3/2057
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
3Mixing, e.g. dispersing, emulsifying, according to the phases to be mixed
20Pretreatment of the materials to be mixed
2057Filtering components
C01F 11/185
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
FCOMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
11Compounds of calcium, strontium, or barium
18Carbonates
185After-treatment, e.g. grinding, purification, conversion of crystal morphology
C01P 2006/22
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
2006Physical properties of inorganic compounds
22Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
Y10S 516/928
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
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
516Colloid systems and wetting agents; subcombinations thereof; processes of
924Significant dispersive or manipulative operation or step in making or stabilizing colloid system
928Mixing combined with non-mixing operation or step, successively or simultaneously, e.g. heating, cooling, ph change, ageing, milling
Applicants
  • IMERYS MINERALS LTD. [GB/GB]; John Keay House St. Austell Cornwall PL25 4DJ, GB (AllExceptUS)
  • MORTIMER, Mark, Daniel [GB/GB]; GB (UsOnly)
  • PURDEY, John, Anthony [GB/GB]; GB (UsOnly)
  • THRALE, Deborah, Susan [GB/GB]; GB (UsOnly)
  • SKUSE, David, Robert [GB/US]; US (UsOnly)
Inventors
  • MORTIMER, Mark, Daniel; GB
  • PURDEY, John, Anthony; GB
  • THRALE, Deborah, Susan; GB
  • SKUSE, David, Robert; US
Agents
  • MCCORMACK, Derek, James; Imerys Minerals Ltd. Intellectual Property Dept. John Keay House St. Austell Cornwall PL25 4DJ, GB
Priority Data
9828514.123.12.1998GB
9910038.030.04.1999GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PRODUCTION OF CONCENTRATED CARBONATE SUSPENSIONS
(FR) PRODUCTION DE SUSPENSIONS CONCENTREES DE CARBONATES
Abstract
(EN)
A method of producing a rheologically stable concentrated aqueous suspension of a particulate alkaline earth metal carbonate which method comprises the following steps: (a) preparing a dilute aqueous suspension of the carbonate having a solids content of not more than 40 % by weight; (b) dewatering the dilute aqueous suspension to form a carbonate suspension having a solids content in the range of from 45 % to 65 % by weight; (c) optionally mixing with the dewatered suspension formed in step (b) a dispersing agent for the carbonate to form a fluid suspension; (d) further dewatering the fluid suspension formed in step (b) by thermal evaporation under reduced pressure to raise the solids content of the suspension by a further differential amount of at least 5 % by weight; and (e) after at least some of the dewatering in step (c) treating the suspension by a mechanical working process in which at least 1 kW.hr per tonne of carbonate on a dry weight basis is dissipated to refluidise the suspension.
(FR)
L'invention porte sur un procédé de production de suspensions aqueuses concentrées et rhéologiquement stables de particules de carbonate de métaux alcalino terreux comportant les étapes suivantes: (a) préparation d'une suspension aqueuse étendue du carbonate dont la teneur en solides en poids ne dépasse pas 40 %; déshydratation de la solution jusqu'à l'obtention d'une teneur en solides de 45 à 65 % en poids; (c) mélange facultatif de la solution obtenue en (b) avec un agent disperseur pour former une suspension fluide; (d) nouvelle déshydratation de la suspension fluide formée en (b) par évaporation thermique sous atmosphère réduite augmentant d'une nouvelle quantité différentielle de 5 % en poids; (e) après une partie au moins de la déshydratation effectuée en (c), traitement de la suspension par un procédé mécanique dépensant au moins 1 kWh/heure par tonne de carbonate pour refluidiser la suspension.
Also published as
MXPA/a/2001/006579
NO20013186
Latest bibliographic data on file with the International Bureau