Method for removing nitrogen dioxide in dimethyl sulfoxide crude product
By using the nitrogen in the kettle internal circulation and blow-off method in the dimethyl sulfoxide production process, the safety hazards and resource waste of nitrogen dioxide treatment in the crude dimethyl sulfoxide products are solved, efficient recycling and recycling of nitrogen dioxide is achieved, and the efficiency and competitiveness of the process are improved.
CN119707756APending Publication Date: 2025-03-28SHENYANG RES INST OF CHEM IND
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Patent Information
- Application Number
- CN202311265735.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-28
- Publication Date
- 2025-03-28
AI Technical Summary
Technical Problem
In the existing dimethyl sulfoxide production process, the nitrogen dioxide dissolved in the crude dimethyl sulfoxide product has problems such as large exhaust gas treatment volume, serious losses, and large safety hazards for waste salt treatment, which are difficult to effectively solve.
Method used
The crude dimethyl sulfoxide product is repeatedly blown off by circulating nitrogen in the kettle, and the nitrogen dioxide and nitrogen are separated by condenser, and the nitrogen dioxide is recovered and recycled to reduce the loss of nitrogen dioxide.
Benefits of technology
It greatly reduces the loss of nitrogen dioxide during the blow-off treatment process, reduces the cost of three waste treatments, and improves the production competitiveness of the process.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a method for removing nitrogen dioxide in dimethyl sulfoxide, and particularly relates to a method for removing nitrogen dioxide in a dimethyl sulfoxide crude product in the process of producing dimethyl sulfoxide from dimethyl sulfide, oxygen and nitrogen dioxide. A dimethyl sulfoxide crude product is introduced into the reactor, and the high-purity dimethyl sulfoxide can be separated and recovered from the crude product by circularly and repeatedly blowing off the dimethyl sulfoxide crude product in a closed device through nitrogen. The production method is suitable for a technology for producing dimethyl sulfoxide through nitrogen dioxide liquid phase oxidation, nitrogen dioxide in the crude product dimethyl sulfoxide is removed, the loss amount of nitrogen dioxide in the air stripping treatment process is greatly reduced, the operation process is easy and convenient to control, and the production method is suitable for modification and upgrading of an existing similar dimethyl sulfoxide production technology.
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