A method for the pretreatment of coal tar feedstocks

By combining centrifugation and filtration with organic solvents and hydrogenation reaction, the problem of poor metal and ash removal in coal tar pretreatment was solved, achieving low-cost and high-efficiency pretreatment that meets environmental protection requirements.

CN116064160BActive Publication Date: 2026-06-16CHINA 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
2021-10-29
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Existing coal tar pretreatment methods suffer from poor pretreatment effects, low efficiency, low resource utilization, and difficulty in meeting environmental protection requirements. In particular, they can easily cause bed blockage and catalyst deactivation in fixed-bed hydrogenation units.

⚗Method used

The process combines centrifugal separation and filtration, using organic compound solvents or solvent oils to assist separation, and combines pretreatment agent contact reaction under hydrogen conditions to reduce the metal and ash content in coal tar.

🎯Benefits of technology

It effectively reduces the metal and ash content in coal tar, simplifies the process, reduces investment and operating costs, avoids phenolic water pollution, and meets environmental protection requirements.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present disclosure relates to a method for pretreating coal tar raw material, which comprises: S1, mixing the coal tar raw material with a solvent and then performing centrifugal separation to obtain a first solid phase material and a first liquid phase material; S2, filtering the first liquid phase material to obtain a second liquid phase material and a third liquid phase material, the solid content of the second liquid phase material being higher than that of the third liquid phase material; S3, mixing the second liquid phase material with the solvent and then returning to step S1 to perform the centrifugal separation; and S4, under a hydrogen condition, contacting the third liquid phase material with a pretreatment agent to perform a pretreatment reaction, and performing gas-liquid separation on the obtained pretreatment reaction product; wherein the solvent is an organic compound solvent or solvent oil. The method of the present disclosure can effectively reduce the metal and ash content in the pretreated coal tar.
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