Method for preparing a basic nitrogen removal agent for chemical waste oil from oil refineries and its applications.

A method combining coal hydrocracking residue and spent FCC catalyst, enhanced by heteropoly acids or metal salts, addresses the inefficiencies of existing nitrogen removal methods by providing a rapid and cost-effective solution for achieving low basic nitrogen content in chemical waste oil.

JP7863705B1Active Publication Date: 2026-05-22GUANGDONG UNIV OF PETROCHEMICAL TECH +1
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
GUANGDONG UNIV OF PETROCHEMICAL TECH
Filing Date
2025-11-27
Publication Date
2026-05-22

AI Technical Summary

Technical Problem

Existing methods for removing basic nitrogen from chemical waste oil, such as hydrodenitrogenation and adsorption denitrogenation, face challenges including high energy consumption, catalyst poisoning, unstable denitrogenation effects, and slow adsorption rates, making it difficult to achieve the required basic nitrogen content of ≤10 μg/g.

Method used

A preparation method involving the combination of coal hydrocracking residue and spent FCC catalyst, followed by hydrothermal treatment and modification with heteropoly acids or metal salts, creates a removal agent with enhanced pore structure and surface activity, achieving rapid and efficient adsorption of basic nitrogen.

Benefits of technology

The method results in a removal agent with a rapid adsorption rate and high capacity, reducing basic nitrogen content to <10 mg/kg, significantly improving the efficiency and cost-effectiveness of waste oil purification.

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Abstract

This invention provides a method for preparing a removal agent having a good basic nitrogen removal effect, and its applications. [Solution] The present invention discloses a method for preparing a basic nitrogen removal agent for chemical waste oil from an oil refinery and its application. The removal agent is obtained by mixing coal hydrotreatment residue and spent FCC catalyst in a mass ratio of 1-9:1-10 and performing hydrothermal treatment. The present invention also discloses that the removal agent prepared by recovering and reusing discarded silica-alumina composite residue has the advantages of low cost, high adsorption capacity, and good adsorption effect. Furthermore, it also discloses that the removal agent can be modified using heteropoly acids and / or metal salts to further improve the adsorption amount and adsorption rate of the removal agent for basic nitrogen.
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Citation Information

Patent Citations

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