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公开(公告)号：US20220106251A1
公开(公告)日：2022-04-07
申请号：US17424204
申请日：2020-01-21
申请人： Arkema France
发明人： Serge TRETJAK , Yves CABON , Andre Levray , Camille Hilpert , Anne Moreliere
摘要： The invention relates to the production of (meth)acrylic esters according to a process by direct esterification, and in particular to the purification of a crude reaction mixture comprising a C4-C12 (meth)acrylic ester using a dividing wall column employed in a particular configuration. The dividing wall column is equipped with a separating wall creating separation zones in the column, the wall not being joined to the upper dome of the column in the top part and being joined to the bottom of the column in the bottom part. The process according to the invention guarantees a product of very high purity, independently of the back-cracking reactions of the heavy by-products liable to arise during the purification of the product sought.
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公开(公告)号：US11926588B2
公开(公告)日：2024-03-12
申请号：US17424204
申请日：2020-01-21
申请人： Arkema France
发明人： Serge Tretjak , Yves Cabon , Andre Levray , Camille Hilpert , Anne Moreliere
摘要： The invention relates to the production of (meth)acrylic esters according to a process by direct esterification, and in particular to the purification of a crude reaction mixture comprising a C4-C12 (meth)acrylic ester using a dividing wall column employed in a particular configuration. The dividing wall column is equipped with a separating wall creating separation zones in the column, the wall not being joined to the upper dome of the column in the top part and being joined to the bottom of the column in the bottom part. The process according to the invention guarantees a product of very high purity, independently of the back-cracking reactions of the heavy by-products liable to arise during the purification of the product sought.
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3.发明申请公开(公告)号：US20160376217A1
公开(公告)日：2016-12-29
申请号：US15102921
申请日：2014-12-09
申请人： ARKEMA FRANCE
发明人： Serge Tretjak , Anne Moreliere
CPC分类号： C07C67/56 , B01D3/145 , B01D61/362 , B01D71/028 , B01D71/38 , B01D2311/2669 , C07C67/08 , Y02P20/582 , C07C69/54
摘要： The present invention relates to the production of (meth)acrylic esters, and more particularly the production of C4-C10 alkyl (meth)acrylates comprising the step of membrane separation dehydration of at least one stream generated during the purification of alkyl (meth)acrylate.
摘要翻译： 本发明涉及（甲基）丙烯酸酯的制备，更具体地说，涉及（甲基）丙烯酸C 4 -C 10烷基酯的制备，其包括在（甲基）丙烯酸烷基酯纯化期间产生的至少一种流的膜分离脱水步骤 。
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公开(公告)号：US10676421B2
公开(公告)日：2020-06-09
申请号：US16081060
申请日：2017-02-14
申请人： Arkema France
摘要： The subject of the present invention is a process for the synthesis of C1-C10 alkyl (meth)acrylates, by direct esterification of the (meth)acrylic acid by the corresponding alcohol, the reaction being carried out in a fixed bed membrane reactor under conditions in which the water generated by the reaction is eliminated from the reaction mixture as it is formed. The process according to the invention may operate under conditions for which the reagents are not in excess, thereby minimizing the size and energy of the equipment for separation/recycling of the streams generated during the purification of the reaction medium.
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公开(公告)号：US10647657B2
公开(公告)日：2020-05-12
申请号：US15102921
申请日：2014-12-09
申请人： Arkema France
发明人： Serge Tretjak , Anne Moreliere
摘要： The invention relates to a method for producing alkyl (meth)acrylate comprising a linear or branched alkyl chain comprising 4 to 10 carbon atoms, by direct esterification of (meth)acrylic acid with a linear or branched alcohol comprising 4 to 10 carbon atoms in the presence of a catalyst, leading to formation of a reaction mixture comprising the desired ester, unreacted acid and alcohol, light by-products, and heavy by-products. The mixture undergoes purification treatment by separation means to obtain purified alkyl (meth)acrylate. The purification treatment comprises a step of membrane separation dehydration applied to at least one of the following: the stream subjected to the final distillation leading to the recovery of the purified (meth)acrylic ester, the aqueous stream originating from the settling out of the reaction mixture, or the stream resulting from the distillation of the light by-products present in the reaction mixture.
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公开(公告)号：US09975842B2
公开(公告)日：2018-05-22
申请号：US15329910
申请日：2015-06-22
申请人： Arkema France
CPC分类号： C07C67/08 , C07C67/54 , Y02P20/582 , C07C69/54
摘要： The present invention relates to a method for producing a C4-C10 alkyl (meth)acrylate, by direct esterification of (meth)acrylic acid by the corresponding alcohol, the reaction water being removed in the form of an azeotrope with the esterification alcohol from a distillation column mounted over the esterification reactor comprising a cationic resin as a catalyst. Said method is characterized in that the molar ratio of alcohol to acid at the inlet of the reactor is between 1.4 and 3, and in that the crude reaction mixture circulates in a recirculation loop joining the reactor and the water removal column, at a recirculation rate of between 6 and 25, expressed by the mass ratio between the flow fed into the loop and the flow sent to a purification treatment.
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公开(公告)号：US09908838B2
公开(公告)日：2018-03-06
申请号：US15032864
申请日：2014-10-21
申请人： Arkema France
发明人： Serge Tretjak , Stephane Denis , Lionel Delais , Anne Moreliere
CPC分类号： C07C67/08 , C07C45/52 , C07C51/44 , C07C51/487 , C07C67/54 , C07C67/58 , Y02P20/582 , C07C47/22 , C07C57/04 , C07C69/54
摘要： The subject matter of the present invention is an improvement in the continuous production of methyl (meth)acrylate or of ethyl (meth)acrylate by direct esterification of (meth)acrylic acid with methanol or ethanol, under reaction conditions for which the acid is in excess relative to the alcohol, in particular with an acid/alcohol molar ratio of between 1.0 and 4, and under a pressure ranging from atmospheric pressure to 5 bar. The process of the invention makes it possible to minimize the formation of ethyl ethoxypropionate during the esterification reaction, and results in an improvement in the material balance, simplification of the purification train for the desired ester, and optimization of the energy balance.
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