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Gel assisted separation method and dewatering/desalting hydrocarbon oils

Inactive Publication Date: 2006-01-26
EXXON RES & ENG CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Hydrocarbon oils, particularly heavy crude oils, contain polar hydrocarbon compounds such as naphthenic acids, nitrogen and sulfur containing hydrocarbon compounds and pose problems in refining.
The presence of salts, especially chlorides of Group I and Group II elements of The Periodic Table of Elements, corrode oil processing equipment.
Heavy crude oils containing high concentrations of asphaltenes, resins, waxes, and napthenic acids are difficult to dewater and desalt and usually require longer processing times, higher process operation temperatures and higher concentrations of demulsifier chemicals to effect the desired dewatering and desalting.
As a result of these processing requirements for heavy crude oils the process throughput is lowered and costs for dewatering and desalting increased.

Method used

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Embodiment Construction

[0014] The gel separation method of the instant invention is useful for hydrocarbon oils comprising polar hydrocarbon compounds. It is particularly useful for crude oils that contain polar hydrocarbon compounds such as naphthenic acids, asphaltenes and metalloprophyrins. Separation of the polar hydrocarbon compounds from the crude oil results in a upgraded crude oil. Preferred hydrocarbon oils are hydrocarbon oils selected from the group consisting of crude oil, crude oil distillate, crude oil residuum or mixtures thereof.

[0015] The desalting and / or dewatering method of the instant invention is useful for hydrocarbon oils comprising salts, water and mixtures thereof. It is particularly useful for heavy and waxy crude oils that are generally difficult to dewater and / or desalt. The salts present in the hydrocarbon oil are inorganic salts including halogens, sulfates and carbonates of Group I and Group II elements of The Periodic Table of Elements. The concentration of the salts can v...

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Abstract

A method for separating polar hydrocarbon compounds from a hydrocarbon oil containing polar hydrocarbon compounds comprising the steps of: a) forming a gel in the hydrocarbon oil, and thereafter b) separating the gel from the hydrocarbon oil to produce a separated gel and a separated hydrocarbon oil.

Description

FIELD OF THE INVENTION [0001] This application claims the benefit of U.S. Provisional Application 60 / 590,891 filed Jul. 23, 2004.[0002] The invention relates to separating polar hydrocarbons from hydrocarbon oils. The invention also relates to desalting and / or dewatering hydrocarbon oils. BACKGROUND [0003] Hydrocarbon oils, particularly heavy crude oils, contain polar hydrocarbon compounds such as naphthenic acids, nitrogen and sulfur containing hydrocarbon compounds and pose problems in refining. There is a need to upgrade such hydrocrabon oils. Separation of polar hydrocarbon compounds such as naphthenic acids, nitrogen and sulfur containing hydrocarbon compounds from crude oils results in upgrading. The present invention addresses this need. [0004] Hydrocarbon oils, particularly crude oils when produced comprise varying amounts of water and inorganic salts like halogens, sulfates and carbonates of Group I and Group II elements of The Periodic Table of Elements. (The Periodic Tabl...

Claims

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Application Information

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IPC IPC(8): C10G31/00
CPCC10G29/02C10G33/04C10G31/08
Inventor VARADARAJ, RAMESH
Owner EXXON RES & ENG CO
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