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Integration of solvent deasphalting and gasification

A deasphalting and process technology, applied in the field of extraction and gasification of asphaltenes, can solve the problems of high cost of solvent recovery, low selectivity, inability to extract aromatic compounds and resins, etc.

Inactive Publication Date: 2002-01-09
GE ENERGY USA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the molecular weight of the solvent increases, the amount of solvent required decreases, but the selectivity such as to resins and aromatic compounds decreases
Propane requires more solvent but does not extract the same amount of aromatics and resins
When using lower molecular weight solvents, the cost of solvent recovery is generally higher

Method used

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  • Integration of solvent deasphalting and gasification
  • Integration of solvent deasphalting and gasification

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Embodiment Construction

[0010] In the context of this application, the term "precipitation" as used in precipitating asphaltenes refers to the formation of asphaltene-rich material into a second phase, which may be and preferably is a fluid or fluid-like phase. In a preferred embodiment of the invention, the precipitated asphaltene-rich material is pumped to a gasifier. A solid asphaltene-rich phase is not preferred due to handling issues.

[0011] The term "gasification zone" as used in this application refers to the zone of a reactor where incoming hydrocarbon material, especially asphaltene-rich material, is mixed with oxygen-containing gas and partially combusted.

[0012] As used in this application, the terms "deasphalted hydrocarbons", "deasphalted oil", DAO and "paraffinic oil" are used interchangeably and refer to the Oil in asphalt solvent.

[0013] The invention is a combined process of extracting asphaltenes with a solvent and gasification through partial oxidation, which utilizes the h...

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Abstract

The invention is the integration of a process of gasifying asphaltenes in a gasification zone by partial oxidation and the process of asphaltene extraction with a solvent. The integration allows low level heat from the gasification reaction to be utilized in the recovery of solvent that was used to extract asphaltenes from an asphaltene-containing hydrocarbon material. Asphaltenes are extracted from an asphaltene-containing hydrocarbon material by mixing a solvent in quantities sufficient to precipitate at least a fraction of the asphaltenes. The precipitated asphaltenes are then gasified in a gasification zone to synthesis gas. The gasification process is very exothermic. The low level heat in the synthesis gas, either directly, or via an intermediate step of low pressure steam, is used to remove and recover the solvent from the deasphalted hydrocarbon material and from the asphaltenes prior to gasification.

Description

field of invention [0001] The invention relates to a process for extracting and gasifying asphaltene from oil, heavy oil, vacuum or distillation residue. More specifically, the present invention relates to a combined process of gasification and deasphalting that utilizes the waste heat (and otherwise waste heat) of the gasification process and converts low-value asphaltenes into high-value synthetic gas. Background of the invention [0002] Many crude oils contain large amounts of asphaltenes. It is desirable to be able to remove the asphaltenes from the oil, both because asphaltenes will solidify and plug subsequent processing equipment, and because removing asphaltenes reduces the viscosity of the oil. Asphaltene solvent extraction processing residual oil produces deasphalted oil (DA0), and then deasphalted oil is catalytically cracked to mainly produce diesel oil. A typical deasphalting process involves contacting heavy oil with a solvent. Solvents are generally alkan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G21/00C10L3/00
CPCC10L3/00C10G21/003Y10S208/95
Inventor R·W·巴克利K·A·约翰森J·L·卡斯巴姆P·S·撒克P·S·华莱士
Owner GE ENERGY USA
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