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公开(公告)号：US20210395107A1
公开(公告)日：2021-12-23
申请号：US17297565
申请日：2019-11-29
Applicant: Arkema France
Inventor： Serge Tretjak , Michel Fauconet , Andre Levray
Abstract: The present invention relates to a process for treating aqueous effluents containing formaldehyde by distillation in the presence of acetic acid, in particular to a process for treating aqueous solutions resulting from the synthesis of acrylic acid. The invention also relates to the use of the purified aqueous solution in a process for producing acrylic acid by catalytic oxidation of propylene and/or propane in steam dilution.
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公开(公告)号：US10000439B2
公开(公告)日：2018-06-19
申请号：US14650906
申请日：2013-12-16
Applicant: Arkema France
Inventor： Alain F. Riondel , Coralie Graire , Marc Esch , Andre Levray
IPC: C07C67/03 , C07C67/54 , C07C213/06 , C07C219/08 , C07C69/54
CPC classification number: C07C67/03 , C07C67/54 , C07C213/06 , Y02P20/582 , C07C69/54 , C07C219/08
Abstract: The invention relates to the production of alkyl acrylate according to a continuous transesterification process. In one embodiment the process of the invention uses a simple column to purify a reaction mixture of acryl acrylate in one step yielding alkyl acrylate with a purity of greater than 99.8%.
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Patent Agency Ranking
公开(公告)号：US20220106251A1
公开(公告)日：2022-04-07
申请号：US17424204
申请日：2020-01-21
Applicant: Arkema France
Inventor： Serge TRETJAK , Yves CABON , Andre Levray , Camille Hilpert , Anne Moreliere
Abstract: 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：US10183907B2
公开(公告)日：2019-01-22
申请号：US15762582
申请日：2016-09-07
Applicant: Arkema France
Inventor： Reinhard Linemann , Benoit Riflade , Serge Tretjak , Andre Levray , Patrice Defer
Abstract: A process for the synthesis of acrylic acid oligomer represented by formula (I): in which n is an integer ranging from 1 to 10, wherein the process comprises the step of heating acrylic acid at a temperature from 50° C. to 200° C. in the presence of a catalyst, water and at least one polymerization inhibitor. Formula (I) where n=0 is acrylic acid, the precursor for preparing the acrylic acid oligomer.
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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
Applicant: Arkema France
Inventor： Serge Tretjak , Yves Cabon , Andre Levray , Camille Hilpert , Anne Moreliere
Abstract: 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：US20180265447A1
公开(公告)日：2018-09-20
申请号：US15762582
申请日：2016-09-07
Applicant: Arkema France
Inventor： Reinhard Linemann , Benoit Riflade , Serge Tretjak , Andre Levray , Patrice Defer
Abstract: A process for the synthesis of acrylic acid oligomer represented by formula (I): in which n is an integer ranging from 1 to 10, wherein the process comprises the step of heating acrylic acid at a temperature from 50° C. to 200° C. in the presence of a catalyst, water and at least one polymerization inhibitor. Formula (I) where n=0 is acrylic acid, the precursor for preparing the acrylic acid oligomer.
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公开(公告)号：US09403750B2
公开(公告)日：2016-08-02
申请号：US14354986
申请日：2012-10-30
Applicant: Arkema France
Inventor： Alain Riondel , Coralie Graire , Andre Levray , Reinhard Linemann
CPC classification number: C07C67/08 , C07C67/54 , C07C67/58 , Y02P20/582 , Y02P20/584 , C07C69/54
Abstract: The invention relates to a process for continuously producing 2-octyl acrylate by reacting acrylic acid and 2-octanol in the presence of a sulfonic acid esterification catalyst and at least one polymerization inhibitor. The water formed by the esterification reaction is entrained by distillation in a column surmounting the reactor in the form of a heteroazeotropic mixture with the 2-octanol which is then subjected, after condensation, to separation in a decanter so as to give an upper organic phase and a lower aqueous phase. The reaction mixture containing the reaction product and residual by-products are purified by separation means in order to obtain: (1) pure 2-octyl acrylate and (2) unreacted 2-octanol and acrylic acid compounds that will be recycled along with the catalyst.
Abstract translation: 本发明涉及在磺酸酯化催化剂和至少一种聚合抑制剂的存在下，通过使丙烯酸和2-辛醇反应连续制备丙烯酸2-辛酯的方法。 通过酯化反应形成的水通过蒸馏夹带在与2-辛醇的混合混合物形式的反应器中，然后在冷凝后将其在滗析器中分离，从而得到上部有机相 和较低的水相。 含有反应产物和残余副产物的反应混合物通过分离方法纯化，以获得：（1）丙烯酸2-辛酯和（2）将与催化剂一起再循环的未反应的2-辛醇和丙烯酸化合物 。
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