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11. 发明公开

EP2501670A1 PROCESS FOR PREPARING ALKANEDIOL AND DIALKYL CARBONATE 有权
标题翻译：一种用于链烷二醇和碳酸二烷基酯的制备方法
公开(公告)号：EP2501670A1
公开(公告)日：2012-09-26
申请号：EP10776726.1
申请日：2010-11-15
申请人： Shell Internationale Research Maatschappij B.V.
发明人： ALLAIS, Cyrille Paul , NISBET, Timothy Michael , VAPORCIYAN, Garo Garbis , VROUWENVELDER, Cornelis Leonardo Maria
IPC分类号： C07C68/06 , C07C69/96
CPC分类号： C07C68/065 , C07C69/96
摘要： The invention relates to a process for the preparation of an alkanediol and a dialkyl carbonate comprising: (a) reacting an alkylene carbonate and an alkanol in the presence of a transesterification catalyst to obtain a reaction mixture comprising dialkyl carbonate, unconverted alkanol, alkanediol, unconverted alkylene carbonate and an alkoxy alkanol impurity; (b) subjecting the reaction mixture to distillation in a first distillation column to obtain a top stream comprising dialkyl carbonate, alkanol and alkoxy alkanol impurity and a bottom stream comprising alkanediol and alkylene carbonate; (c) subjecting the bottom stream from the first distillation column to distillation in a second distillation column to obtain a top stream comprising alkanediol and a bottom stream comprising alkylene carbonate; (d) subjecting the top stream from the first distillation column to distillation in a third distillation column in the presence of a catalyst to effect reaction of the alkoxy alkanol impurity with the dialkyl carbonate into a carbonate ether impurity, to obtain a top stream comprising alkanol and a bottom stream comprising dialkyl carbonate and carbonate ether impurity; and (e) subjecting the bottom stream from the third distillation column to distillation in a fourth distillation column to obtain a top stream comprising dialkyl carbonate and a bottom stream comprising dialkyl carbonate and carbonate ether impurity; and (f) recycling the bottom stream from the fourth distillation column to the first distillation column.

12. 发明公开

EP2121566A1 PROCESS FOR THE PREPARATION OF AN ALKANEDIOL AND A DIALKYL CARBONATE 有权
标题翻译：制备链烷二醇和二烷基碳酸酯的方法
公开(公告)号：EP2121566A1
公开(公告)日：2009-11-25
申请号：EP08708012.3
申请日：2008-01-21
申请人： Shell Internationale Research Maatschappij B.V.
发明人： NISBET, Timothy Michael , VAPORCIYAN, Garo Garbis , VROUWENVELDER, Cornelis Leonardo Maria , WOOD, Paul
IPC分类号： C07C68/06 , C07C69/96 , C07C29/12 , C07C31/20
CPC分类号： C07C68/065 , C07C69/96
摘要： An alkanediol and a dialkyl carbonate are prepared in a process comprising: (a) reacting an alkylene carbonate and an alkanol feedstock into a first reaction zone under transesterification conditions to obtain a product mixture of dialkyl carbonate, unconverted alkanol, the alkanediol, unconverted alkylene carbonate and dimers of the alkanediol; (b) separating dialkyl carbonate and alkanol from the product mixture to obtain a bottom product stream containing alkanediol, unconverted alkylene carbonate and dimers of the alkanediol; (c) recovering the dialkyl carbonate; and (d) separating alkanediol from the bottom product stream to leave a recycle stream comprising unconverted alkylene carbonate and dimers of the alkanediol, which process further comprises (e) passing at least part of the recycle stream to a second reaction zone in which the dimers of the alkanediol are converted to higher-boiling oligomers of alkanediol, yielding an oligomers-containing effluent; (f) separating the higher-boiling oligomers from the oligomers-containing effluent yielding an alkylene carbonate-containing remaining stream; and (g) recycling the alkylene carbonate-containing remaining stream to the first reaction zone.
摘要翻译：链烷二醇和碳酸二烷基酯的制备方法包括：（a）使碳酸亚烷基酯和链烷醇原料在酯交换条件下进入第一反应区，得到碳酸二烷基酯，未转化的链烷醇，链烷二醇，未转化的亚烷基碳酸酯和链烷二醇的二聚体; （b）从产物混合物中分离碳酸二烷基酯和链烷醇以获得含有链烷二醇，未转化的亚烷基碳酸酯和链烷二醇二聚体的底部产物流; （c）回收碳酸二烷基酯; （d）从底部产物物流中分离链烷二醇以留下包含未转化的亚烷基碳酸酯和链烷二醇二聚物的再循环物流，该方法还包括（e）使至少部分再循环物流通过第二反应区，其中二聚物链烷二醇转化成链烷二醇的高沸点低聚物，产生含低聚物的流出物; （f）将高沸点低聚物与含低聚物的流出物分离，得到含碳酸亚烷基酯的剩余物流; 和（g）将含碳酸亚烷基酯的剩余物流再循环至第一反应区。

13. 发明授权

EP2125693B1 PROCESS FOR THE PREPARATION OF DIARYL CARBONATE 有权
标题翻译：用于生产二芳基
公开(公告)号：EP2125693B1
公开(公告)日：2015-08-19
申请号：EP08708008.1
申请日：2008-01-21
申请人： Shell Internationale Research Maatschappij B.V.
发明人： VAN DER HEIDE, Evert , NISBET, Timothy Michael , VAPORCIYAN, Garo Garbis , VROUWENVELDER, Cornelis Leonardo Maria
IPC分类号： C07C68/06 , C07C69/96
CPC分类号： C07C68/06 , Y02P20/127 , C07C69/96

14. 发明公开

EP2121564A1 PROCESS FOR THE PREPARATION OF DIARYL CARBONATE 有权
标题翻译：用于生产二芳基
公开(公告)号：EP2121564A1
公开(公告)日：2009-11-25
申请号：EP08708009.9
申请日：2008-01-21
申请人： Shell Internationale Research Maatschappij B.V.
发明人： NISBET, Timothy Michael , VAPORCIYAN, Garo Garbis , VROUWENVELDER, Cornelis Leonardo Maria , WOOD, Paul
IPC分类号： C07C68/06 , C07C69/96 , C07C29/128
CPC分类号： C07C68/065 , C07C68/06 , C07C69/96
摘要： Diaryl carbonate is prepared by reaction of an aromatic alcohol with a dialkyl carbonate, which dialkyl carbonate has been prepared by the reaction of an alkanol and an alkylene carbonate, which process comprises the following steps : (a) passing an aromatic alcohol and a dialkyl carbonate into a first transesterification zone to obtain a first product stream containing diaryl carbonate, alkanol, unconverted dialkyl carbonate and unconverted aromatic alcohol; (b) separating the first product stream into a diaryl carbonate-rich product stream, an aromatic alcohol-rich recycle stream and a second recycle stream comprising alkanol, dialkyl carbonate and aromatic alcohol; (c) feeding alkanol and alkylene carbonate into a second transesterification zone to obtain a second product stream comprising alkanediol and unconverted alkanol and dialkyl carbonate; (d) separating alkanediol from the second product stream to yield an alkanediol product stream and a mixture of dialkyl carbonate and unconverted alkanol; (e) subjecting the mixture of dialkyl carbonate and unconverted alkanol and the second recycle stream comprising alkanol, dialkyl carbonate and aromatic alcohol to the same distillation to obtain an alkanol stream as the lower-boiling fraction and a contaminated stream comprising dialkyl carbonate and aromatic alcohol as the higher-boiling fraction; (f ) recycling the alkanol stream of step e) to the second transesterification zone; and (g) passing the contaminated stream comprising dialkyl carbonate and aromatic alcohol, and the aromatic alcoholrich recycle stream to the first transesterification zone.

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