Method of extracting maltol from waste asphalt through sublimation
By mixing the pulverized waste asphalt with alcohol, filtering and distilling it, and then sublimating it in a vacuum sublimation kettle, the problem of low maltol yield and high solid waste is solved, achieving high-efficiency extraction of maltol and improving environmental pollution.
CN110845459AInactive Publication Date: 2020-02-28ANHUI JINHE INDUSTRIAL CO LTD
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Patent Information
- Application Number
- CN201911131282.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2019-11-19
- Publication Date
- 2020-02-28
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Technical Problem
In the existing maltol production process, the waste asphalt produced by the sublimation section contains part of the maltol, resulting in a low yield and a large amount of solid waste, which needs to be recycled to improve efficiency.
Method used
The crushed waste asphalt is mixed with alcohol in an extraction kettle, heated, filtered and distilled, and then vacuum sublimated in a sublimation kettle to obtain maltol.
Benefits of technology
It effectively extracts maltol from sublimated waste asphalt, improves product yield, reduces solid waste volume and transportation costs, reduces smoke and odor pollution during the incineration process, and improves the environment.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to a method of extracting maltol from waste asphalt through sublimation. The method comprises following steps: (1) grinding waste asphalt generated in maltol production, adding 1000 to 1200 L of alcohol into an extraction kettle at first, then adding 500 kg of powdery waste asphalt, stirring, raising the temperature to 50-60 DEG C, and maintaining the temperature for 1 to 1.5hours; (2) subjecting the liquid in the extraction kettle to press filtering, transferring the filtrate to a distillation still, and carrying out distillation to recover alcohol in the filtrate; and(3) after the alcohol is recovered, transferring the residual liquid to a sublimation kettle, and carrying out sublimation to obtain the sublimated maltol. The method has the advantages that (1) the yield of maltol is increased, after processing, the asphalt volume is obviously reduced, and the cost for processing waste asphalt is reduced.
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