A METHOD FOR RECOVERING AN AROMATIC ALCOHOL FROM A MELT POLYMERIZATION, AND A SYSTEM FOR RECOVERING THE SAME

• Main Authors: NADAL SERGIO FERRER, BOJARSKI AARON DAVID, FERNANDEZ IGNACIO VIC, AGUDO JORGE A GARCIA
• Format: Patent
• Language: Chinese; English
• Published: 17.07.2018
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

In an embodiment, a method of purifying an aromatic alcohol comprises melt polymerizing a dihydroxy compound and a carbonate compound in the presence of a transesterification catalyst to form the aromatic alcohol and a polycarbonate in a melt polymerization facility; removing the aromatic alcohol in an overhead stream; separating the overhead stream in an aromatic alcohol purification unit into apurified aromatic alcohol stream comprising the aromatic alcohol and a purification unit bottom stream; separating the purification unit bottom stream in a diaryl carbonate purification unit into a diaryl carbonate stream and a diaryl carbonate purification unit bottom stream; and cracking a compound in the diaryl carbonate purification unit bottom stream in a cracker unit in the presence of a cracking agent to form a resultant stream comprising additional aromatic alcohol. 在个实施方式中，种纯化芳香族醇的方法包括：在熔融聚合设备中，在酯交换催化剂存在下，熔融聚合二羟基化合物和碳酸酯化合物以形成芳香族醇和聚碳酸酯；去除塔顶流中的芳香族醇；在芳香族醇纯化单元中，将塔顶流分离成包含芳香族醇的纯化的芳香族醇流和纯化单元底部流；在碳酸二芳基酯纯化单元中，将纯化单元底部流