Oil-water separation technology using phase separation reactor

Patent metadata

Field	Value
Publication number	US-11795069-B2
Application number	US-202016824236-A
Country	US
Kind code	B2
Filing date	Mar 19, 2020
Priority date	Mar 21, 2019
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

A phase separator apparatus includes a fluid flow pathway and a phase separator. The fluid flow pathway includes a fluid inlet and a fluid outlet. The fluid flow pathway is configured to flow multiphase fluid including an oil phase and a water phase from the fluid inlet to the fluid outlet. The phase separator is spatially positioned relative to the fluid flow pathway to receive the multiphase fluid flowing from the fluid outlet. The phase separator includes a mounting substrate and a separation layer attached to the mounting substrate. The separation layer includes a material switchable between oleophilic and hydrophobic under a first condition and oleophobic and hydrophilic under a second condition. The separation layer is configured to separate the oil phase and the water phase when the separation layer is under either the first condition or the second condition.

First claim

What is claimed is:

1. A phase separation reactor system comprising:
a first phase separation reactor and a second phase separation reactor, each of the first phase separation reactor and the second phase separation reactor comprising:
a drum defining a fluid flow pathway comprising a fluid inlet and a fluid outlet, the fluid flow pathway configured to flow a multiphase fluid mix comprising an oil phase and a water phase from the fluid inlet to the fluid outlet; and
a phase separator spatially positioned relative to the fluid flow pathway to receive the multiphase fluid mix flowing through the drum, the phase separator comprising:
a mounting substrate; and
a separation layer attached to the mounting substrate, the separation layer comprising a material switchable between oleophilic and hydrophobic under a first condition and oleophobic and hydrophilic under a second condition, the separation layer configured to separate the oil phase and the water phase when the separation layer is under either the first condition or the second condition, wherein the material of the separation layer switches between the first condition and the second condition in response to modification of the pH of the separation layer by the multiphase fluid mix;

an acid-base container within a housing, the acid-base container attached to, and fluidically connected to, an outlet of the first phase separation reactor and an inlet of the second phase separation reactor, the acid-base container carrying one or more chemicals configured to switch the material between the first condition and the second condition;
and wherein
the system is configured such that:

as the multiphase fluid mix flows through the first phase separation reactor, the separation layer of the first phase separation reactor is switched to the first condition;
the pH of the multiphase fluid mix flowing from the outlet of the first phase separation reactor to the acid-base container is modified by the chemical carried by the compartment of the acid-base container; and
the multiphase fluid mix then flows from the acid-base container to the inlet of the second phase separation reactor and the separation layer of the second phase separation reactor is switched to the second condition.

2. The phase separation reactor system of claim 1 , wherein the separation layer is covalently bonded to the mounting substrate.

3. The phase separation reactor system of claim 1 , wherein the separation layer is configured to permit flow of the oil phase through the separation layer and prevent flow of the water phase through the separation layer under the first condition.

4. The phase separation reactor system of claim 1 , wherein the separation layer is configured to permit flow of the water phase through the separation layer and prevent flow of the oil phase through the separation layer under the second condition.

5. The phase separation reactor system of claim 1 , wherein the mounting substrate includes a plurality of openings to permit flow of the oil phase or the water phase flowed through the separation layer.

Assignees

• Saudi Arabian Oil Co

Inventors

• Ahmed Zeyad Tareq

Classifications

• C02F1/40 Primary

  Devices for separating or removing fatty or oily substances or similar floating material (cleaning or keeping clear the surface of open water from oil or like materials E02B15/04; devices in sewers for separating liquid or solid substances from sewage E03F5/14, e.g. for use in drains leading to the sewer E03F5/16) · CPC title

• B01D69/02

  characterised by their properties · CPC title

• B01D69/06

  Flat membranes · CPC title

• B01D17/0202

  by ab- or adsorption · CPC title

• B01D17/045

  with coalescers · CPC title