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Process for treating inferior oil product

A process method and technology for oil products, which are applied in the field of heavy oil treatment by hydrogenation-catalysis combined process, can solve problems such as unfavorable stable operation of devices and inability to fundamentally change the growth trend of pressure drop in a pre-reactor.

Active Publication Date: 2017-05-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method alleviates the increase in pressure drop by changing the loads of each anti-feed, but cannot fundamentally change the growth trend of the pre-reactor pressure drop. From the point of view of actual industrial operation, once the pressure drop starts to increase, it will quickly reach the design upper limit. Moreover, changing the feeding of each reverse inlet is not conducive to the stable operation of the device.

Method used

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  • Process for treating inferior oil product
  • Process for treating inferior oil product
  • Process for treating inferior oil product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The hydroprocessing reactor A, hydroprocessing reactor B, and hydroprocessing reactor C described in Example 1 all use raw material A as the residual oil feed. The properties are shown in Table 1. The 50% catalytic cracking unit Cracked diesel oil, all FCC heavy cycle oil and all FCC oil slurry are recycled to the hydrotreating pretreatment reaction zone. The properties are shown in Table 2. Among them, the FCC heavy cycle oil is all allocated to hydroprocessing reactor A, the proportion of FCC diesel allocated to hydroprocessing reactor B is 15%, and the proportion of FCC slurry is 70%; it is allocated to hydroprocessing The proportion of FCC diesel oil in reactor C is 35%, and the proportion of FCC oil slurry is 30%. The total catalyst loading, feed properties, and feed amounts of the hydroprocessing reactor A, the hydroprocessing reactor B, and the hydroprocessing reactor C are completely the same, and the hydroprocessing reactor A, The catalysts of hydrotreating rea...

Embodiment 2

[0073] In Example 2, the hydrotreating reactor A, hydrotreating reactor B, and hydrotreating reactor C all use residual oil feedstock B, and 30% of the catalytic cracking diesel oil in the catalytic cracking unit is combined with All the FCC heavy cycle oil and all the FCC oil slurry are circulated to the hydrotreating pretreatment reaction zone, and the FCC heavy cycle oil is all distributed to the hydrotreating reactor A. The proportion of FCC diesel oil allocated to hydroprocessing pretreatment reactor B is 15%, and the proportion of FCC oil slurry is 50%. The proportion of FCC diesel oil allocated to the hydroprocessing pretreatment reactor C is 15%, and the proportion of FCC oil slurry is 50%. The space velocity of each reverse feed is different, and the volumetric space velocity of liquid A in the hydrotreating pretreatment reactor is 0.20h -1 , The volumetric space velocity of liquid B in the hydrogenation pretreatment reactor is 0.32h -1 , The volumetric space velocity ...

Embodiment 3

[0075] In Example 3, the raw material A is used in the hydroprocessing reactor A, the raw material B is used in the hydroprocessing reactor B, and the raw material C is used in the hydroprocessing reactor C. The properties of the residual oil raw materials used are shown in the table 1. Circulate 50% of the catalytically cracked diesel oil and all the catalytically cracked heavy cycle oil and all the catalytically cracked oil slurry in the catalytic cracking unit to the hydrotreating reaction zone, where all the catalytically cracked heavy cycle oil is allocated to the hydrotreating pretreatment In reactor A, the proportion of catalytically cracked diesel oil allocated to hydroprocessing reactor B is 25%, the proportion of catalytic cracking oil slurry is 50%, and the proportion of catalytic cracking diesel allocated to hydroprocessing reactor C is 25%. The ratio of cracked oil slurry is 50%. The feed amounts of the hydroprocessing reactor A, hydroprocessing reactor B, and hydr...

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Abstract

The invention discloses a process for treating an inferior oil product. The process comprises a hydropretreating reaction zone, a hydrotreating reaction zone and a catalytic cracking reaction zone. The process comprises the following contents: mixing a residual oil raw material and hydrogen, then successively allowing the mixture to pass through the hydropretreating reaction zone and the hydrotreating reaction zone which are connected in series, subjecting a reaction effluent of the hydrotreating reaction zone to gas-liquid separation, allowing a gas phase to recycle back to the hydropretreating reaction zone and / or the hydrotreating reaction zone, allowing a liquid phase to directly enter the catalytic cracking reaction zone and carrying out a catalytic cracking reaction, and separating a catalytic cracking reaction effluent so as to obtain dry gas, liquefied gas, catalytically cracked gasoline fraction, catalytically cracked diesel fraction, catalytically cracked heavy recycle oil and catalytically cracked slurry oil, wherein the catalytically cracked diesel oil, the catalytically cracked heavy recycle oil and the slurry oil are partially or completely recycled back to the hydrotreating reaction zone for a hydrotreating reaction. The method provided by the invention can prolong the cycle of stable operation of equipment.

Description

Technical field [0001] The invention relates to a method for lightening heavy oil, in particular to a method for treating heavy oil by adopting a hydrogenation-catalysis combined process. Background technique [0002] At present, the demand for gasoline, coal, diesel and other oil products in the domestic and foreign oil markets, especially for motor gasoline, will continue to increase, while the demand for heavy fuel oil and other heavy oil products will show a downward trend. At the same time, the nature of crude oil is getting worse all over the world, and environmental protection laws and regulations are becoming stricter and stricter and stricter on the quality of oil. Therefore, how to achieve lighter heavy oil and continuous upgrading of gasoline and diesel product quality at a more economical and reasonable price has become the focus of attention of the domestic and foreign refining industries. [0003] The main purpose of the residual oil hydrotreating process is to great...

Claims

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Application Information

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IPC IPC(8): C10G69/00
CPCC10G69/00C10G2300/1077
Inventor 刘铁斌耿新国翁延博李洪广
Owner CHINA PETROLEUM & CHEM CORP
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