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Reactor staging for slurry hydro-conversion of polycyclic aromatic hydrocarbon feeds

A technology of hydroconversion and reactor, which is applied in hydroprocessing process, hydrocarbon oil treatment, petroleum industry, etc., and can solve problems such as the scaling risk of fixed-bed hydrogenation reactors

Inactive Publication Date: 2020-03-17
EXXON RES & ENG CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the presence of slurry catalyst, demetallization products and coke in the liquid effluent from the first reactor stage poses a fouling risk for fixed bed hydrogenation reactors

Method used

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  • Reactor staging for slurry hydro-conversion of polycyclic aromatic hydrocarbon feeds
  • Reactor staging for slurry hydro-conversion of polycyclic aromatic hydrocarbon feeds
  • Reactor staging for slurry hydro-conversion of polycyclic aromatic hydrocarbon feeds

Examples

Experimental program
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Embodiment approach 1

[0059] Embodiment 1. A method of processing a heavy oil feedstock comprising: providing a heavy oil feedstock having a 10% distillation point of at least about 650°F (343°C); The heavy oil feedstock is exposed to a catalyst under hydroconversion conditions to form a first effluent, the first effective slurry hydroconversion conditions comprising a temperature of about 840°F (449°C) to about 1000°F (538°C) and a temperature of about 1500 psig to A pressure of 3000 psig; exposing at least a portion of the first effluent to a catalyst in a second hydroconversion reactor under second effective slurry hydroconversion conditions to form a second effluent; second effective slurry hydroconversion conditions comprising a temperature of about 750°F (399°C) to about 840°F (449°C) and a pressure of about 1500 psig to about 3000 psig; wherein the temperature of the second effective slurry hydroconversion condition is lower than the first effective slurry hydroconversion condition temperatu...

Embodiment approach 2

[0060] Embodiment 2. The method of embodiment 1, further comprising exposing the first effluent to a separator; wherein the separator extracts from the first effluent prior to exposing the first effluent to the second hydroconversion reactor The naphtha and distillate fractions were removed.

Embodiment approach 3

[0061] Embodiment 3. The method of embodiment 2, wherein the separator comprises a first separator and a second separator; further comprising exposing the first effluent to the first separator, thereby forming a first separator bottom fraction and first separator light fraction; where first separator bottoms contains 650°F+ (343°C+) hydrocarbons and first separator light fraction contains 650°F-(343°C-) hydrocarbons and process gas; exposing at least a portion of the first separator bottoms fraction to a second hydroconversion reactor; exposing the first separator light fraction to a second separator, thereby forming a liquid containing 160°F+(71°C+ ) a second separator bottoms fraction of hydrocarbons and a second separator light fraction comprising 160°F-(71°C-) hydrocarbons and process gas; and exposing at least a portion of the second separator light fraction to a second added Hydrogen conversion reactor.

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Abstract

Methods for processing heavy oil feeds are provided comprising first and second hydro-conversion reactors at differing hydro-conversion conditions.

Description

technical field [0001] The present invention provides a process for slurry hydroprocessing of polycyclic aromatic hydrocarbon feeds such as fluid catalytic cracker (FCC) main column bottoms (MCB), steam cracked tars and coker gas oils. Background technique [0002] Slurry hydroprocessing provides a method for converting high-boiling, low-value petroleum fractions into higher-value liquid products. Slurry hydroconversion technology can process difficult feeds, such as those with high concentrations of polycyclic aromatic hydrocarbons (PAHs), while still maintaining high liquid yields. Slurry hydroconversion units have been used to process challenging streams found in refinery / petrochemical complexes such as FCC MCB, steam cracked tars and coker gas oils. Slurry hydroprocessing provides the means to convert low-value heavy feedstocks into fuels using technologies that are less prone to fouling than emerging fixed-bed technologies. In fixed bed reactors, there is a risk that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/10C10G65/12
CPCC10G65/12C10G65/10C10G67/02
Inventor G·R·约翰逊J·P·格里雷P·博德斯阿德罗K·萨托夫斯基
Owner EXXON RES & ENG CO