Patents by Inventor Serge Tretjak

Serge Tretjak has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240368067
    Abstract: A process for the production of butyl acrylate by direct esterification of acrylic acid with butanol, the reaction being catalyzed by sulfuric acid. More specifically, the present invention relates to an improved process for producing butyl acrylate comprising a step of upgrading the heavy by-products generated during this production, leading to a high productivity of a product meeting the standards as regards purity and acidity, under optimized energy conditions.
    Type: Application
    Filed: July 25, 2022
    Publication date: November 7, 2024
    Inventors: Serge TRETJAK, Andre LEVRAY
  • Patent number: 12122746
    Abstract: The invention relates to the manufacture of alkyl acrylates by direct esterification of acrylic acid by the corresponding alcohol. In particular, the invention relates to the use of a topping column equipped with a side draw-off making it possible to draw off a stream rich in acid impurities, such as ?-hydroxypropionic acid and ?-acryloyloxypropionic acid, during the distillation of the crude reaction mixture, in order to produce an acrylic ester meeting purity standards which are compatible with its use to prepare acrylic polymers.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: October 22, 2024
    Assignee: Arkema France
    Inventors: Serge Tretjak, Camille Hilpert
  • Patent number: 12116339
    Abstract: The invention relates to a process for the continuous production of acrylic acid, in the absence of organic solvent and in the absence of chemical treatment of the aldehydes, and without employing a dividing-wall column, from a gaseous reaction mixture comprising acrylic acid obtained by gas-phase oxidation of a precursor of acrylic acid.
    Type: Grant
    Filed: March 23, 2021
    Date of Patent: October 15, 2024
    Assignee: Arkema France
    Inventors: Serge Tretjak, Aurelien Huve
  • Patent number: 12098123
    Abstract: The invention relates to the purification of an acrylic acid comprising aldehyde compounds in a low content, according to a distillation process in a distillation unit in the absence of chemical reagent for treating the aldehydes, producing a stream of polymer-grade acrylic acid which is withdrawn through a side outlet of the distillation unit. The invention makes it possible to eliminate the use of a product classified as CMR in the manufacture of polymer-grade acrylic acid from a technical-grade acrylic acid, and thus meets the HSE requirements for industrial plants.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: September 24, 2024
    Assignee: Arkema France
    Inventors: Serge Tretjak, Veronique Scharff, Aurelien Huve
  • Publication number: 20240124382
    Abstract: The invention relates to the manufacture of alkyl acrylates by direct esterification of acrylic acid with the corresponding alcohol. In particular, the invention relates to the use of a cracker in combination with a topping column equipped with a side draw-off allowing a stream rich in acidic impurities such as ?-hydroxypropionic acid and ?-acryloxypropionic acid to be drawn off during distillation of the crude reaction mixture, so as to produce an acrylic ester meeting purity standards compatible with its use for preparing acrylic polymers.
    Type: Application
    Filed: February 8, 2022
    Publication date: April 18, 2024
    Inventors: Anne MORELIERE, Serge TRETJAK, Marc ESCH, Camille HILPERT
  • Patent number: 11926588
    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.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: March 12, 2024
    Assignee: Arkema France
    Inventors: Serge Tretjak, Yves Cabon, Andre Levray, Camille Hilpert, Anne Moreliere
  • Publication number: 20230109749
    Abstract: The invention relates to a process for the continuous production of acrylic acid, in the absence of organic solvent and in the absence of chemical treatment of the aldehydes, and without employing a dividing-wall column, from a gaseous reaction mixture comprising acrylic acid obtained by gas-phase oxidation of a precursor of acrylic acid.
    Type: Application
    Filed: March 23, 2021
    Publication date: April 13, 2023
    Inventors: Serge TRETJAK, Aurelien HUVE
  • Publication number: 20220234982
    Abstract: The invention relates to the manufacture of alkyl acrylates by direct esterification of acrylic acid by the corresponding alcohol. In particular, the invention relates to the use of a topping column equipped with a side draw-off making it possible to draw off a stream rich in acid impurities, such as ?-hydroxypropionic acid and ?-acryloyloxypropionic acid, during the distillation of the crude reaction mixture, in order to produce an acrylic ester meeting purity standards which are compatible with its use to prepare acrylic polymers.
    Type: Application
    Filed: April 23, 2020
    Publication date: July 28, 2022
    Inventors: Serge Tretjak, Camille Hilpert
  • Publication number: 20220169589
    Abstract: The invention relates to the purification of an acrylic acid comprising aldehyde compounds in a low content, according to a distillation process in a distillation unit in the absence of chemical reagent for treating the aldehydes, producing a stream of polymer-grade acrylic acid which is withdrawn through a side outlet of the distillation unit. The invention makes it possible to eliminate the use of a product classified as CMR in the manufacture of polymer-grade acrylic acid from a technical-grade acrylic acid, and thus meets the HSE requirements for industrial plants.
    Type: Application
    Filed: March 20, 2020
    Publication date: June 2, 2022
    Inventors: Serge Tretjak, Veronique Scharff, Aurelien Huve
  • Publication number: 20220106251
    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.
    Type: Application
    Filed: January 21, 2020
    Publication date: April 7, 2022
    Inventors: Serge TRETJAK, Yves CABON, Andre Levray, Camille Hilpert, Anne Moreliere
  • Patent number: 11261150
    Abstract: The invention relates to the production of (meth)acrylic esters according to a continuous process by transesterification, and in particular to the purification of a crude reaction mixture comprising a C4-C12 (meth)acrylic ester using a divided wall column employed in a particular configuration. This configuration results in a simplification of the purification process with a reduced energy consumption and a minimized content of impurities present in the purified (meth)acrylic ester. The invention also relates to a process for the production of C4-C12 (meth)acrylic ester comprising this recovery/purification process.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: March 1, 2022
    Assignee: Arkema France
    Inventors: Eloi Rolez, Serge Tretjak
  • Publication number: 20210395107
    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.
    Type: Application
    Filed: November 29, 2019
    Publication date: December 23, 2021
    Inventors: Serge Tretjak, Michel Fauconet, Andre Levray
  • Publication number: 20210300857
    Abstract: The invention relates to the production of (meth)acrylic esters according to a continuous process by transesterification, and in particular to the purification of a crude reaction mixture comprising a C4-C12 (meth)acrylic ester using a divided wall column employed in a particular configuration. This configuration results in a simplification of the purification process with a reduced energy consumption and a minimized content of impurities present in the purified (meth)acrylic ester. The invention also relates to a process for the production of C4-C12 (meth)acrylic ester comprising this recovery/purification process.
    Type: Application
    Filed: July 3, 2018
    Publication date: September 30, 2021
    Inventors: Eloi Rolez, Serge TRETJAK
  • Patent number: 10815182
    Abstract: The invention relates to the use of a column with a separating wall as a purification/finishing column in a (meth)acrylic acid recovery method based on the use of two distillation columns in the absence of external organic solvent. The method according to the invention improves the energy balance for the method while improving the technical quality of the (meth)acrylic acid recovered. The method according to the invention further produces polymer-grade (or glacial) (meth)acrylic acid compatible with the production of high-molecular weight acrylic acid polymers.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: October 27, 2020
    Assignee: Arkema France
    Inventors: Michel Jean Fauconet, Serge Tretjak
  • Patent number: 10676421
    Abstract: 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.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: June 9, 2020
    Assignee: Arkema France
    Inventors: Marianthi Elmaloglou, Anne Moreliere, Serge Tretjak
  • Patent number: 10647657
    Abstract: 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.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: May 12, 2020
    Assignee: ARKEMA FRANCE
    Inventors: Serge Tretjak, Anne Moreliere
  • Publication number: 20200115311
    Abstract: The invention relates to the use of a column with a separating wall as a purification/finishing column in a (meth)acrylic acid recovery method based on the use of two distillation columns in the absence of external organic solvent. The method according to the invention improves the energy balance for the method while improving the technical quality of the (meth)acrylic acid recovered. The method according to the invention further produces polymer-grade (or glacial) (meth)acrylic acid compatible with the production of high-molecular weight acrylic acid polymers.
    Type: Application
    Filed: April 3, 2018
    Publication date: April 16, 2020
    Inventors: Michel Jean Fauconet, Serge TRETJAK
  • Patent number: 10508074
    Abstract: The subject of the invention is a process for recovering/purifying a C1-C4 (meth)acrylic ester from a crude reaction mixture comprising said ester, the process being carried out using a purification system comprising a divided wall column and a decanter, resulting in a simplification of the process and in a high productivity of the ester produced corresponding to the standards in terms of purity. The invention also relates to a process for producing C1-C4 (meth)acrylic ester comprising this recovery/purification process.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: December 17, 2019
    Assignee: Arkema France
    Inventors: Serge Tretjak, Nathalie Hess, Rose Aguiar, Pierre-Emmanuel Conoir, Christophe Oses
  • Publication number: 20190071384
    Abstract: 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.
    Type: Application
    Filed: February 14, 2017
    Publication date: March 7, 2019
    Inventors: Marianthi ELMALOGLOU, Anne MORELIERE, Serge TRETJAK
  • Patent number: 10183907
    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.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: January 22, 2019
    Assignee: Arkema France
    Inventors: Reinhard Linemann, Benoit Riflade, Serge Tretjak, Andre Levray, Patrice Defer