A crude benzol refining process
By using a composite extraction solvent and a secondary distillation process, the problems of environmental pollution and high energy consumption in the refining of crude benzene have been solved, and the production of high-purity toluene has been achieved, reducing energy consumption and production costs.
CN117820071BActive Publication Date: 2026-05-29TANGSHAN RUIDA IND CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TANGSHAN RUIDA IND CO LTD
- Filing Date
- 2023-11-09
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
Existing crude benzene refining technologies suffer from environmental pollution, incomplete sulfide removal, high equipment investment, high energy consumption, and low product purity.
Method used
High-purity toluene is produced by using a composite extraction solvent, N-formylmorpholine and 1-(2-hydroxyethyl)-2-pyrrolidone, combined with a two-stage distillation extraction process, through multi-tower separation and extractive distillation.
Benefits of technology
It has enabled the production of high-purity toluene products, reduced energy consumption and production costs, reduced environmental pollution, and met the national standard GB/T 2284-2009 for superior grade coking toluene.
✦ Generated by Eureka AI based on patent content.
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Figure CN117820071B_ABST
Abstract
The application belongs to the technical field of chemical industry, and provides a crude benzene refining process, wherein the crude benzene is subjected to extraction of toluene fraction through a crude benzene separation unit, and then the toluene fraction is subjected to extraction distillation process to obtain pure toluene; the extractant used in the extraction distillation is N-formyl morpholine and 1-(2-hydroxyethyl)-2-pyrrolidone with a mass ratio of 0.8-1.4:1. The method provided by the application combines the composite extraction solvent and the secondary distillation extraction process to obtain toluene products with a purity of 99.99%, and the bromine value and the sulfur impurity content and other indexes of the toluene products reach the standard of superior product of coking toluene in the national standard GB / T 2284-2009.
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