公开(公告)号：CA3117346A1

公开(公告)日：2020-05-07

申请号：CA3117346

申请日：2019-10-30

Applicant: BASF SE

Inventor： CATLING MITCHELL ,  BOXILL LOIS ,  BELLWOOD JOHN ,  SILVA GAXIOLA CARLOS ,  TORRES LOPEZ CORALYS

IPC: C02F1/56 ,  C02F1/52

Abstract: The invention relates to a process for separating solids from an aqueous slurry containing particulate material, which particulate material comprises sand particles and fines particles and contains clay particles, which aqueous suspension has a solids content of from 25 to 70% by weight and a sand to fines ratio of from 0.5:1 to 5:1, which process comprises applying a treatment system to the aqueous slurry to cause flocculation of the particulate material, and subsequently separating the so formed flocculated particulate material as solids from the slurry, in which the treatment system comprises (a) at least one ionic polymeric de-coagulant, which exhibits a weight average molar mass of below 2 million g/mol; (b) at least one polymeric flocculant, which has an intrinsic viscosity of at least 5 dl/g (measured at 25°C in 1 M NaCI) and (c) optionally, at least one cationic coagulant.

公开(公告)号：CA3077551A1

公开(公告)日：2021-10-06

申请号：CA3077551

申请日：2020-04-06

Applicant: BASF SE

Inventor： CATLING MITCHELL LOUIS ,  SORTWELL EDWIN T ,  BOXILL LOIS ,  BELLWOOD JOHN

IPC: B01D21/01 ,  B03B9/02

Abstract: The invention relates to a process for separating solids from an aqueous slurry con-taining particulate material, which particulate material comprises sand particles and fines particles and contains clay particles, which aqueous suspension has a solids content of from 30 to 70% by weight and a sand to fines ratio of from greater than 1:1 to 3:1, which process comprises applying a treatment system to the aqueous slurry to cause flocculation of the particulate material, and subsequently separating the so formed flocculated particulate material as solids from the slurry, in which the treatment system comprises (a) at least one aluminosilicate nanoparticulate material, in which the molar ratio of aluminium to silicon is from 0.7:1 to 3:1; (b) at least one polymeric flocculant, which has an intrinsic viscosity of at least 5 dl/g (measured at 25 C in 1 M NaCI), and (c) optionally, at least one cationic coagulant. In addition, the present invention also encompasses a composition formed from an aqueous slurry containing particulate material, which particulate material comprises sand particles and fines particles and contains clay particles, which aqueous suspen-sion has a solids content of from 30 to 70% by weight and a sand to fines ratio of from greater than 1:1 to 3:1, which composition comprises flocculated particulate sol-ids and a treatment system in which the treatment system comprises: (a) at least one aluminosilicate nanoparticulate material, in which the molar ratio of aluminium to sili-con is from 0.7:1 to 3:1; (b) at least one polymeric flocculant, which has an intrinsic viscosity of at least 5 dl/g (measured at 25 C in 1 M NaCI), and (c) optionally, at least one cationic coagulant. Further, the invention relates to the aforementioned treatment system and its use. The invention provides effective dewatering of aqueous slurries containing particulate material having sand and fines components and containing clay particles employing a new treatment system to yield a dewatered particulate material.