公开(公告)号：US20210155511A1

公开(公告)日：2021-05-27

申请号：US17165472

申请日：2021-02-02

申请人： EnviCore Inc.

发明人： Milana Trifkovic ,  Shahrukh Shamim ,  Aleksandra Govedarica ,  Mahmoud Ansari

IPC分类号： C02F1/52 ,  C02F1/56 ,  C02F11/143 ,  C02F11/148

摘要： Methods are provided for treating intimately dispersed mixtures of water, bitumen, and fine clay particles, such as oil sands mature fine tailings (MFT). Select methods use dissolved silicate ions and a base (alkali), optionally in combination with a biopolymer, to flocculate a slurry. A mixing regime is disclosed involving the addition to MFT of silicate ions in solution and alkali, to initiate aggregation/destabilization of clay particles. Methods are exemplified that provide distinct sediment layers in conjunction with the release of residual bitumen (for example 40-50% of the initial bitumen content). In these exemplified embodiments, a densely packed bottom layer containing ˜75 wt. % solids showed high yield stress values (3.5-5.5 kPa) and entrapped little residual bitumen (0.2-0.3 wt. %). The methods accordingly segregate a material suitable for reclamation.

公开(公告)号：US11639303B2

公开(公告)日：2023-05-02

申请号：US17165472

申请日：2021-02-02

申请人： EnviCore Inc.

发明人： Milana Trifkovic ,  Shahrukh Shamim ,  Aleksandra Govedarica ,  Mahmoud Ansari

IPC分类号： C02F1/52 ,  C02F1/56 ,  C02F101/10 ,  C02F101/32 ,  C02F11/143 ,  C02F11/148 ,  C02F103/10

摘要： Methods are provided for treating intimately dispersed mixtures of water, bitumen, and fine clay particles, such as oil sands mature fine tailings (MFT). Select methods use dissolved silicate ions and a base (alkali), optionally in combination with a biopolymer, to flocculate a slurry. A mixing regime is disclosed involving the addition to MFT of silicate ions in solution and alkali, to initiate aggregation/destabilization of clay particles. Methods are exemplified that provide distinct sediment layers in conjunction with the release of residual bitumen (for example 40-50% of the initial bitumen content). In these exemplified embodiments, a densely packed bottom layer containing ˜75 wt. % solids showed high yield stress values (3.5-5.5 kPa) and entrapped little residual bitumen (0.2-0.3 wt. %). The methods accordingly segregate a material suitable for reclamation.

公开(公告)号：US11912593B2

公开(公告)日：2024-02-27

申请号：US18124535

申请日：2023-03-21

申请人： EnviCore Inc.

发明人： Milana Trifkovic ,  Shahrukh Shamim ,  Aleksandra Govedarica ,  Mahmoud Ansari

IPC分类号： C02F1/52 ,  C02F1/56 ,  C02F101/32 ,  C02F11/143 ,  C02F11/148 ,  C02F1/26 ,  C02F101/10 ,  C02F103/10

CPC分类号： C02F1/5245 ,  C02F1/26 ,  C02F1/56 ,  C02F11/143 ,  C02F11/148 ,  C02F2001/5218 ,  C02F2101/10 ,  C02F2101/32 ,  C02F2103/10

摘要： Methods are provided for treating intimately dispersed mixtures of water, bitumen, and fine clay particles, such as oil sands mature fine tailings (MFT). Select methods use dissolved silicate ions and a base (alkali), optionally in combination with a biopolymer, to flocculate a slurry. A mixing regime is disclosed involving the addition to MFT of silicate ions in solution and alkali, to initiate aggregation/destabilization of clay particles. Methods are exemplified that provide distinct sediment layers in conjunction with the release of residual bitumen (for example 40-50% of the initial bitumen content). In these exemplified embodiments, a densely packed bottom layer containing ˜75 wt. % solids showed high yield stress values (3.5-5.5 kPa) and entrapped little residual bitumen (0.2-0.3 wt. %). The methods accordingly segregate a material suitable for reclamation.

公开(公告)号：US20230219831A1

公开(公告)日：2023-07-13

申请号：US18124535

申请日：2023-03-21

申请人： EnviCore Inc.

发明人： Milana Trifkovic ,  Shahrukh Shamim ,  Aleksandra Govedarica ,  Mahmoud Ansari

IPC分类号： C02F1/26 ,  C02F1/56

CPC分类号： C02F1/26 ,  C02F1/56 ,  C02F2001/5218

摘要： Methods are provided for treating intimately dispersed mixtures of water, bitumen, and fine clay particles, such as oil sands mature fine tailings (MFT). Select methods use dissolved silicate ions and a base (alkali), optionally in combination with a biopolymer, to flocculate a slurry. A mixing regime is disclosed involving the addition to MFT of silicate ions in solution and alkali, to initiate aggregation/destabilization of clay particles. Methods are exemplified that provide distinct sediment layers in conjunction with the release of residual bitumen (for example 40-50% of the initial bitumen content). In these exemplified embodiments, a densely packed bottom layer containing ˜75 wt. % solids showed high yield stress values (3.5-5.5 kPa) and entrapped little residual bitumen (0.2-0.3 wt. %). The methods accordingly segregate a material suitable for reclamation.

公开(公告)号：US20240254019A1

公开(公告)日：2024-08-01

申请号：US18588538

申请日：2024-02-27

申请人： EnviCore Inc.

发明人： Milana Trifkovic ,  Shahrukh Shamim ,  Aleksandra Govedarica ,  Mahmoud Ansari

IPC分类号： C02F1/52 ,  C02F1/26 ,  C02F1/56 ,  C02F11/143 ,  C02F11/148 ,  C02F101/10 ,  C02F101/32 ,  C02F103/10

CPC分类号： C02F1/5245 ,  C02F1/26 ,  C02F1/56 ,  C02F11/143 ,  C02F11/148 ,  C02F2001/5218 ,  C02F2101/10 ,  C02F2101/32 ,  C02F2103/10

摘要： Methods are provided for treating intimately dispersed mixtures of water, bitumen, and fine clay particles, such as oil sands mature fine tailings (MFT). Select methods use dissolved silicate ions and a base (alkali), optionally in combination with a biopolymer, to flocculate a slurry. A mixing regime is disclosed involving the addition to MFT of silicate ions in solution and alkali, to initiate aggregation/destabilization of clay particles. Methods are exemplified that provide distinct sediment layers in conjunction with the release of residual bitumen (for example 40-50% of the initial bitumen content). In these exemplified embodiments, a densely packed bottom layer containing ˜75 wt. % solids showed high yield stress values (3.5-5.5 kPa) and entrapped little residual bitumen (0.2-0.3 wt. %). The methods accordingly segregate a material suitable for reclamation.

公开(公告)号：US20240043330A1

公开(公告)日：2024-02-08

申请号：US18268946

申请日：2021-12-21

申请人： EnviCore Inc.

发明人： Aseem Pandey ,  Milana Trifkovic ,  Shahrukh Shamim

IPC分类号： C04B20/02 ,  C04B18/12 ,  C04B14/10 ,  C04B28/04 ,  C04B28/10 ,  C02F9/00 ,  B03D3/02

CPC分类号： C04B20/023 ,  C04B18/12 ,  C04B14/10 ,  C04B28/04 ,  C04B28/105 ,  C02F9/00 ,  B03D3/02 ,  C02F1/66

摘要： A method for treatment of tailings including, but not limited to, mature fine tailings (MFT) from mine tailings, oil sands, coal tailings, industrial tailings, thin fine tailings (TF), and laterite tailings. The method comprises contacting the tailing with a deflocculant to reduce the yield stress and viscosity of the tailings, resulting in accelerated solid mineral sedimentation and segregation. The process may yield nanoclays (NCs) that may be used for NC compositions.

公开(公告)号：US10906821B2

公开(公告)日：2021-02-02

申请号：US16448923

申请日：2019-06-21

申请人： Envicore Inc.

发明人： Milana Trifkovic ,  Shahrukh Shamim ,  Aleksandra Govedarica ,  Mahmoud Ansari

IPC分类号： C02F1/52 ,  C02F1/56 ,  C02F101/32 ,  C02F103/10 ,  C02F11/143 ,  C02F11/148 ,  C02F101/10

摘要： Methods are provided for treating intimately dispersed mixtures of water, bitumen, and fine clay particles, such as oil sands mature fine tailings (MFT). Select methods use dissolved silicate ions and a base (alkali), optionally in combination with a biopolymer, to flocculate a slurry. A mixing regime is disclosed involving the addition to MFT of silicate ions in solution and alkali, to initiate aggregation/destabilization of clay particles. Methods are exemplified that provide distinct sediment layers in conjunction with the release of residual bitumen (for example 40-50% of the initial bitumen content). In these exemplified embodiments, a densely packed bottom layer containing ˜75 wt. % solids showed high yield stress values (3.5-5.5 kPa) and entrapped little residual bitumen (0.2-0.3 wt. %). The methods accordingly segregate a material suitable for reclamation.