Separation system and separation method of ethanol and acetal

The invention discloses an ethanol and acetal separation system, which comprises an acetal separation tower, the tower wall of the acetal separation tower is provided with a raw material feed inlet and an entrainer feed inlet, the raw material feed inlet is arranged in the middle of the tower wall,...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SUN YUBIN, LI HONGXIONG, CUI XINJIANG, YUAN HANGHANG, GAO WEI, YANG DONGYUAN, JING XULIANG, LI TENGHAO, LI YANNAN, ZHAO JIANPING, SHI FENG, CHEN JING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention discloses an ethanol and acetal separation system, which comprises an acetal separation tower, the tower wall of the acetal separation tower is provided with a raw material feed inlet and an entrainer feed inlet, the raw material feed inlet is arranged in the middle of the tower wall, the position of the entrainer feed inlet is lower than that of the raw material feed inlet, and the position of the raw material feed inlet is lower than that of the entrainer feed inlet. The tower top of the acetaldehyde separation tower is connected with an entrainer recovery tower, and outlets are formed in the bottoms of the acetaldehyde separation tower and the entrainer recovery tower. Meanwhile, the invention also discloses a method for separating ethanol and acetal by adopting the separation system. According to the method, acetonitrile is used as an entrainer, high-purity acetal is obtained through one-step azeotropic distillation, and then separation of the entrainer acetonitrile and ethanol is achieved t