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Disponibilité de l'Abrégé et des Revendications

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  • lorsque le brevet est émis (délivrance).
(12) Demande de brevet: (11) CA 2889586
(54) Titre français: RECUPERATION DE MINERAUX LOURDS DE RESIDUS DE SABLES BITUMINEUX
(54) Titre anglais: RECOVERY OF HEAVY MINERALS FROM OIL SANDS TAILINGS
(51) Classification internationale des brevets (CIB):
  • C10G 1/04 (2006.01)
(72) Inventeurs (Pays):
  • OMOTOSO, OLADIPO (Canada)
  • MOISAN, BRENT ALLEN (Canada)
  • MEKETA, MATTHEW (Etats-Unis d'Amérique)
  • XIA, JIYANG (Chine)
  • ANTLE, RYAN (Etats-Unis d'Amérique)
(73) Titulaires (Pays):
  • SUNCOR ENERGY INC. (Canada)
(71) Demandeurs (Pays):
  • SUNCOR ENERGY INC. (Canada)
(74) Agent: ROBIC
(45) Délivré:
(22) Date de dépôt: 2015-04-27
(41) Mise à la disponibilité du public: 2016-10-27
Requête d’examen: 2015-12-18
(30) Licence disponible: S.O.
(30) Langue des documents déposés: Anglais

Abrégé anglais



A process for recovering heavy minerals from oil sands tailings including
water,
solids and residual bitumen is provided. The process includes subjecting the
oil
sands tailings to flotation to produce a froth concentrate including heavy
minerals
and organic materials, and an aqueous stream including hydrophilic materials,
wherein the oil sands tailings are contacted with an oxidizing agent reacting
with
at least part of the organic materials to generate gas bubbles that aid in the

flotation. The process also includes separating the froth concentrate into a
first
fraction and a second fraction, wherein the separating includes contacting the

froth concentrate with a solvent to produce the first fraction including
insoluble
organic materials and a portion of the heavy minerals and the second fraction
including solubilized bitumen components.


Note : Les revendications sont présentées dans la langue officielle dans laquelle elles ont été soumises.


21

CLAIMS

1. A process for recovering heavy minerals from froth treatment tailings
comprising water, solids and residual bitumen, the process comprising:
subjecting the froth treatment tailings or a stream derived from the
froth treatment tailings to flotation to produce a froth concentrate
comprising heavy minerals and organic materials, and an aqueous
stream comprising hydrophilic materials, wherein the froth treatment
tailings are contacted with an oxidizing agent which reacts with at least
part of the organic materials to generate gas bubbles that aid in the
flotation;
adding an amine-based solvent to the froth concentrate to form a
diluted froth concentrate mixture comprising solubilized bitumen
components and insoluble organic materials; and
filtering the diluted froth concentrate mixture to recover a first fraction
comprising the insoluble organic materials as retentate and a second
fraction comprising the solubilized bitumen components as filtrate.
2. The process of claim 1, wherein the stream derived from the froth treatment

tailings comprises a centrifuge cake obtained from centrifuging the froth
treatment tailings, the centrifuge cake being diluted prior to the flotation.
3. The process of claim 1 or 2, wherein the oxidizing agent comprises hydrogen

peroxide.
4. The process of any one of claims 1 to 3, wherein the oxidizing agent
comprises ozone.
5. The process of any one of claims 1 to 4, wherein the oxidizing agent is
added
in a concentration of up to about 10 wt% of the solids of the froth treatment
tailings.


22

6. The process of any one of claims 1 to 4, wherein the oxidizing agent is
added
in a concentration of about 0.005 wt% to about 2 wt% of the solids of the
froth treatment tailings.
7. The process of any one of claims 1 to 6, wherein the flotation is mostly
induced by CO2 bubbles.
8. The process of any one of claims 1 to 7, further comprising agitating the
oil
sands tailings and the oxidizing agent during the flotation.
9. The process of any one of claims 1 to 8, further comprising injecting a gas

into the oil sands tailings during flotation.
10. The process of claim 1 to 9, wherein the gas includes air, nitrogen and/or

argon.
11. The process of any one of claims 1 to 10, wherein the amine-based solvent
is
added in a concentration of about 40 wt% to about 60 wt% of the froth
concentrate.
12. The process of any one of claims 1 to 11, further comprising separating
the
second fraction into a recovered solvent stream and a solvent-depleted
bitumen-enriched stream.
13. The process of claim 12, wherein the separating of the second fraction
comprises at least one of liquid-liquid separation and distillation.
14. The process of claim 12 or 13, wherein the separating of the second
fraction
is performed in a closed pressure vessel.
15. The process of any one of claims 12 to 14, further comprising recycling at

least part of the recovered solvent stream for re-use in the separation of the

froth concentrate.


23

16. The process of any one of claims 12 to 15, further comprising supplying
the
solvent-depleted bitumen-enriched stream to an upgrading operation.
17. The process of claim 16, wherein the upgrading operation is operated at a
temperature similar to the temperature of the separating of the second
fraction.
18. The process of any one of claims 12 to 17, wherein the second fraction
separation temperature is above the boiling point of the amine-based solvent.
19. The process of any one of claims 1 to 18, wherein the amine-based solvent
comprises a secondary amine.
20. The process of claim 18, wherein the secondary amine comprises
diisopropylamine (DiPA).
21. The process of any one of claims 1 to 20, wherein the amine-based solvent
further comprises at least one of methyl-ethyl-ketone (MEK), methyl-
isopropyl-ketone (MiPK) and isopentanol.
22. The process of any one of claims 1 to 21, further comprising treating and
depositing the aqueous stream including hydrophilic materials for sub-aerial
dewatering and drying.
23. A process for recovering heavy minerals from oil sands tailings comprising

water, solids and residual bitumen, the process comprising:
subjecting the oil sands tailings to flotation to produce a froth
concentrate comprising heavy minerals and organic materials, and an
aqueous stream comprising hydrophilic materials, wherein the oil
sands tailings are contacted with an oxidizing agent reacting with at
least part of the organic materials to generate gas bubbles that aid in
the flotation; and


24

separating the froth concentrate into a first fraction and a second
fraction, wherein the separating comprises contacting the froth
concentrate with a solvent to produce the first fraction comprising
insoluble organic materials and a portion of the heavy minerals and
the second fraction comprising solubilized bitumen components.
24. The process of claim 23, wherein the oil sands tailings comprise froth
treatment tailings.
25. The process of claim 23, wherein the oil sand tailings comprise a diluted
centrifuge cake derived from froth treatment tailings.
26. The process of claim 23, wherein the oil sand tailings comprise re-diluted

dewatered oil sands tailings.
27. The process of any one of claims 23 to 26, wherein the oxidizing agent
comprises hydrogen peroxide.
28. The process of any one of claims 23 to 27, wherein the oxidizing agent
comprises ozone.
29. The process of any one of claims 23 to 28, wherein the oxidizing agent is
added in a concentration of up to about 10 wt% of the oil sand tailings
solids.
30. The process of any one of claims 23 to 28, wherein the oxidizing agent is
added in a concentration of about 0.005 wt% to about 2 wt% of the oil sand
tailings.
31. The process of any one of claims 23 to 30, wherein the flotation is mostly

induced by the gas bubbles.
32. The process of any one of claims 23 to 31, further comprising agitating
the oil
sands tailings and the oxidizing agent during the flotation.


25

33. The process of any one of claims 23 to 32, further comprising injecting a
gas
into the oil sands tailings during flotation.
34. The process of claim 33, wherein the gas includes air, nitrogen and/or
argon.
35. The process of any one of claims 23 to 34, wherein the separating of the
froth concentrate comprises:
adding the solvent to the froth concentrate to form a diluted froth
concentrate mixture comprising the insoluble organic materials; and
filtering the diluted froth concentrate mixture to recover the first fraction
as
retentate and the second fraction as filtrate.
36. The process of any one of claims 23 to 35, wherein the solvent is added in
a
concentration of about 40 wt% to 60 wt% of the froth concentrate.
37. The process of any one of claims 23 to 36, further comprising separating
the
second fraction into a recovered solvent stream and a solvent-depleted
bitumen-enriched stream.
38. The process of claim 37, wherein the separating of the second fraction
comprises at least one of liquid-liquid separation and distillation.
39. The process of claim 37 or 38, wherein the separating of the second
fraction
is performed in a closed pressure vessel.
40. The process of any one of claims 37 to 39, further comprising recycling at

least part of the recovered solvent stream for re-use in the separation of the

froth concentrate.
41. The process of any one of claims 37 to 40, further comprising supplying
the
solvent-depleted bitumen-enriched stream to an upgrading operation.


26

42. The process of claim 41, wherein the upgrading operation is operated at a
temperature similar to the temperature of the separating of the second
fraction.
43. The process of any one of claims 37 to 42, wherein the second fraction
separation temperature is above the boiling point of the solvent.
44. The process of any one of claims 23 to 43, wherein the solvent comprises
an
amine.
45. The process of claim 44, wherein the amine comprises a secondary amine.
46. The process of claim 45, wherein the secondary amine comprises
diisopropylamine (DiPA).
47. The process of any one of claims 23 to 43, wherein the solvent comprises
at
least one of diisopropylamine (DiPA), triethylamine (TEA), and isopentanol.
48. The process of any one of claims 23 to 44, wherein the separating of the
froth concentrate is performed at a temperature of up to 80°C.
49. The process of any one of claims 23 to 48, wherein the gas bubbles include

CO2 bubbles.
50. The process of any one of claims 23 to 49, further comprising treating and

depositing the aqueous stream including hydrophilic materials for sub-aerial
dewatering and drying.
51. The process of any one of claims 23 to 50, wherein the flotation is
performed
in a flotation vessel such that the froth concentrate is recovered as an
overflow stream and the aqueous stream including hydrophilic materials is
recovered as an underflow stream.


Désolé, le dessin représentatatif concernant le document de brevet no 2889586 est introuvable.

Pour une meilleure compréhension de l’état de la demande ou brevet qui figure sur cette page, la rubrique Mise en garde , et les descriptions de Brevet , États administratifs , Taxes périodiques et Historique des paiements devraient être consultées.

États admin

Titre Date
(22) Dépôt 2015-04-27
Requête d'examen 2015-12-18
(41) Mise à la disponibilité du public 2016-10-27

Taxes périodiques

Description Date Montant
Dernier paiement 2016-12-14 100,00 $
Prochain paiement si taxe applicable aux petites entités 2018-04-27 50,00 $
Prochain paiement si taxe générale 2018-04-27 100,00 $

Avis : Si le paiement en totalité n’a pas été reçu au plus tard à la date indiquée, une taxe supplémentaire peut être imposée, soit une des taxes suivantes :

  • taxe de rétablissement prévue à l’article 7 de l’annexe II des Règles sur les brevets ;
  • taxe pour paiement en souffrance prévue à l’article 22.1 de l’annexe II des Règles sur les brevets ; ou
  • surtaxe pour paiement en souffrance prévue aux articles 31 et 32 de l’annexe II des Règles sur les brevets.

Historique des paiements

Type de taxes Anniversaire Échéance Montant payé Date payée
Dépôt 400,00 $ 2015-04-27
Requête d'examen 800,00 $ 2015-12-18
Taxe périodique - Demande - nouvelle loi 2 2017-04-27 100,00 $ 2016-12-14

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Filtre Télécharger sélection en format PDF (archive Zip)
Description du
Document
Date
(yyyy-mm-dd)
Nombre de pages Taille de l’image (Ko)
Abrégé 2015-04-27 1 21
Description 2015-04-27 20 861
Revendications 2015-04-27 6 205
Dessins 2015-04-27 9 165
Page couverture 2016-11-03 1 32
Poursuite-Amendment 2015-12-18 2 59
Poursuite-Amendment 2017-01-11 4 189
Poursuite-Amendment 2017-07-11 45 1 727
Description 2017-07-11 23 922
Revendications 2017-07-11 17 566
Poursuite-Amendment 2017-10-05 3 216