A method and system for ethylene tar hydroprocessing lightening
CN116004284BActive Publication Date: 2026-07-24CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2021-10-22
- Publication Date
- 2026-07-24
AI Technical Summary
Technical Problem
Existing methods for lightening ethylene tar have low product conversion rates, are difficult to separate, have complex processes, and low utilization rates, mainly serving as low-priced fuels or heavy residue oils.
Method used
A method involving a single stage of low-temperature liquid-phase hydrogenation and a second stage of gas-phase hydrogenation is employed to first remove the gum from ethylene tar, followed by liquid-phase and gas-phase hydrogenation treatments to separate light and heavy fractions at 40-220℃.
Benefits of technology
It improves the conversion activity and product yield of ethylene tar, increases the added value of the product, and the light fraction can be used as a blending component for high-octane gasoline.
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Smart Images
Figure CN116004284B_ABST
Abstract
The present application provides a method and system for hydrogenation lightening of ethylene tar, which comprises: a) removing gum from ethylene tar raw material through pretreatment separation; b) removing the polymerizable component above 200 DEG C through first liquid-phase hydrogenation of the ethylene tar raw material from which the gum is removed to obtain a first liquid-phase hydrogenation stream; c) after gas-liquid separation of the first liquid-phase hydrogenation stream, the liquid-phase stream is subjected to second gas-phase hydrogenation so that the unsaturated hydrocarbon component in the liquid-phase stream is subjected to second gas-phase hydrogenation to obtain a second gas-phase hydrogenation stream; d) after gas-liquid separation of the second gas-phase hydrogenation stream, the liquid-phase mixture is separated to obtain a light fraction with a distillation range of 40-220 DEG C and a heavy fraction. The present application can recover and separate heavy aromatic solvent oil and other products. The method can be used for treating C9+, C10+ ethylene tar byproduct of refinery device to increase production of light aromatic hydrocarbon or high-octane gasoline blending component with high added value.
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