一种从副产母液中提取四丁基溴化铵的方法
本发明提供一种从副产母液中提取四丁基溴化铵的方法,属于四丁基溴化铵回收领域。所述从副产母液中提取四丁基溴化铵的方法,由以下步骤组成:浓缩、结晶预处理、结晶。所述浓缩,由以下步骤组成:薄膜蒸发、检测判断;所述薄膜蒸发采用一次薄膜蒸发、二次薄膜蒸发。所述结晶预处理,采用预处理剂对二次薄膜蒸发液进行处理后,制得结晶预处理液,然后进行降温结晶。本发明的从副产母液中提取四丁基溴化铵的方法,能够对副产母液中的四丁基溴化铵实现有效回收,其结晶率可达91.9-92.7%;制得的四丁基溴化铵纯度可达99.8-99.9%,溶剂残留量为779-804mg/kg;能够有效改善四丁基溴化铵的色度。 The invent...
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Zusammenfassung: | 本发明提供一种从副产母液中提取四丁基溴化铵的方法,属于四丁基溴化铵回收领域。所述从副产母液中提取四丁基溴化铵的方法,由以下步骤组成:浓缩、结晶预处理、结晶。所述浓缩,由以下步骤组成:薄膜蒸发、检测判断;所述薄膜蒸发采用一次薄膜蒸发、二次薄膜蒸发。所述结晶预处理,采用预处理剂对二次薄膜蒸发液进行处理后,制得结晶预处理液,然后进行降温结晶。本发明的从副产母液中提取四丁基溴化铵的方法,能够对副产母液中的四丁基溴化铵实现有效回收,其结晶率可达91.9-92.7%;制得的四丁基溴化铵纯度可达99.8-99.9%,溶剂残留量为779-804mg/kg;能够有效改善四丁基溴化铵的色度。
The invention provides a method for extracting tetrabutylammonium bromide from byproduct mother liquor, and belongs to the field of tetrabutylammonium bromide recovery. The method for extracting tetrabutylammonium bromide from the byproduct mother liquor comprises the following steps: concentration, crystallization pretreatment and crystallization. The concentration comprises the following steps: thin film evaporation, detection and judgment; the thin film evaporation adopts primary thin film evaporation and secondary thin film evaporation. The crystallization pretreatment comprises the following steps: treating the secondary film evaporation liquid by adopting a pretreatment agent to prepare a crystallization pretreatment l |
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