公开(公告)号：US20130075306A1

公开(公告)日：2013-03-28

申请号：US13623924

申请日：2012-09-21

Applicant: TOTAL E&P CANADA LTD.

Inventor： Ali MILANI ,  Alan RHODES

IPC: C10G1/04

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

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

Abstract translation: 从含沥青的泡沫中回收沥青的方法利用其中具有多个内部物质的溶剂和单一的泡沫沉降容器。 首先用足够的溶剂稀释泡沫以降低泡沫的粘度，将稀释的泡沫添加到内部物质上方的容器中。 将附加的溶剂添加到容器中，或者在内部之下，内部中间或两者之间，并且逆流流向在多个内部件上向下流动的稀释泡沫。 相对于烃浓度的溶剂浓度的梯度通过作为多个分离阶段的内部物质形成。 沥青和其他轻质组分的产品用溶剂携带到容器的顶部。 较重的组分如水，固体和沥青质聚集体通过重力下落到容器的底部。 在使用链烷烃溶剂的情况下，泡沫的初始稀释的溶剂与沥青的比例保持在沥青质被排除的比例以下。 当溶剂与沥青比例增加时，基本上所有的沥青质排斥都发生在沉降容器中。