公开(公告)号：US09150795B2

公开(公告)日：2015-10-06

申请号：US13623924

申请日：2012-09-21

Applicant: TOTAL E&P CANADA LTD.

Inventor： Ali Milani ,  Alan Rhodes

IPC: C10G21/00 ,  C10G33/06 ,  C10G1/04

CPC classification number: C10G33/06 ,  C10G1/047 ,  C10G21/00

Abstract: A method of recovering bitumen from a froth utilizes solvent and a single settling vessel having a plurality of internals. The froth is diluted with enough solvent to reduce viscosity and is added to the vessel above the internals. Additional solvent is added below the internals, intermediate the internals or both and is flowed counter-current to the diluted froth flowing downwardly over the internals, forming a gradient of solvent concentration relative to hydrocarbon concentration throughout the internals, acting as multiple stages of separation. The bitumen and other light components, rise with the solvent to the top of the vessel. The heavier components, such as water, solids and asphaltene aggregates fall to the bottom by gravity. Where paraffinic solvents are used, the solvent-to-bitumen ratio (S:B) for the initial dilution of froth is below that at which asphaltenes are rejected. Substantially all asphaltene rejection occurs in the vessel as S:B increases therein.

Abstract translation: 从泡沫中回收沥青的方法利用溶剂和具有多个内部物质的单个沉降容器。 将泡沫用足够的溶剂稀释以降低粘度，并将其添加到内部的容器上。 额外的溶剂被添加到内部以下，内部中间或两者之间，并且逆流流向在内部向下流动的稀释泡沫，形成相对于贯穿整个内部的烃浓度的溶剂浓度的梯度，用作多个分离阶段。 沥青和其他轻质组分随着溶剂升高到容器的顶部。 较重的组分，如水，固体和沥青质聚集体通过重力落到底部。 当使用链烷烃溶剂时，初始稀释泡沫的溶剂与沥青的比例（S：B）低于沥青质被排除的比率。 当S：B增加时，基本上所有的沥青质排斥发生在容器中。