US 11,078,434 B2 · Process and system for upgrading low-quality oils

Process and system for upgrading low-quality oils

AssigneesChina Petroleum & Chemical Corporation, Research Institute of Petroleum Processing, Sinopec

InventorsJun Long, Huandi Hou, Zijun Wang, Haiping Shen, Ming Dong, Lishun Dai, Jianhong Gong, Jiguang Li, Shuhong Zhang, Cuihong Wang, Yucheng She, Yuzhang Wang, Mengying Tao

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Abstract

Disclosed is a process and system for upgrading low-quality oils. The upgrading process comprises: (1) subjecting a low-quality oil to a conversion reaction in the presence of hydrogen and optionally in the presence of a conversion catalyst to obtain a conversion product, (2) processing the conversion product to obtain a first processed product, wherein the first processed product comprises a specific amount of a special component, and (3) subjecting the first processed product to extraction separation to obtain an upgraded oil and a pitch. The upgrading process and the upgrading system have the advantages of stable operation, high upgrading efficiency, environmental friendliness, low coke yield or high yield of upgraded oil.

Claims20

Dependent claims

An upgrading process, comprising:

(1) subjecting a low-quality oil used as an upgrading feedstock to a conversion reaction in the presence of hydrogen to obtain a conversion product,
(2) processing the conversion product to obtain a first processed product, wherein the first processed product comprises from 20 wt % to 60 wt % of a component having a boiling point or boiling range between 350° C. and 524° C., and
(3) subjecting the first processed product to extraction separation to obtain an upgraded oil and a pitch.

An upgrading system, comprising a conversion reactor, a conversion product processing unit, a first control unit, and an extraction column, wherein the conversion product processing unit comprises a flash tank, a fractionation column, or a distillation column,

wherein the conversion reactor is configured to conduct a conversion reaction of a low-quality oil in the presence of hydrogen and discharge a conversion product,
the conversion product processing unit is configured to process the conversion products and discharge a first processed product,
the first control unit comprises a first pressure control device and/or a first temperature control device and is configured to control the operating conditions of the conversion product processing unit such that the first processed product comprises from 20 wt % to 60 wt % of a component having a boiling point or a boiling range between 350° C. and 524° C., and
the extraction column is configured to conduct an extraction separation of the first processed product and discharge an upgraded oil and a pitch.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

16/646,070Filed 11 Sep 2017

Published

US 2020/0283688 A110 Sep 2020

Granted

3 Aug 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification37 codes

C10G 21/14
Organic compounds only: hydrocarbons
C10G 67/02
Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one process for refining in the absence of hydrogen only: plural…
B01D 3/06
Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping: flash distillation
B01D 11/04
Solvent extraction: of solutions which are liquid