Method for stripping M resin containing aniline and benzothiazole
The invention relates to the technical field of waste treatment, in particular to a steam stripping method for M resin containing aniline and benzothiazole. Comprising the following steps: S1, adding M resin containing aniline and benzothiazole into a solvent, grinding and soaking to obtain a mixed...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention relates to the technical field of waste treatment, in particular to a steam stripping method for M resin containing aniline and benzothiazole. Comprising the following steps: S1, adding M resin containing aniline and benzothiazole into a solvent, grinding and soaking to obtain a mixed solution; s2, adding the mixed solution into a tower kettle for extractive distillation, detecting the content of benzothiazole in tower kettle liquid when a tower top discharge material is not layered and does not have an oil phase, and stopping extractive distillation after the content reaches the standard; s3, water is added for steam stripping, and after steam stripping is completed, a mixture of benzothiazole and aniline is separated out from the tower top; adding a sodium hydroxide solution into a tower kettle, carrying out reflux reaction, layering tower kettle liquid, separating supernatant and lower-layer slag, adding hydrochloric acid into the supernatant, and carrying out suction filtration to obtain a s |
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