Patents by Inventor Osit Karroonnirun

Osit Karroonnirun 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).

  • Continuous process for making polybutylene terephthalate
    Patent number: 10377854
    Abstract: A process for preparing polybutylene terephthalate (PBT) which includes step of melting solid PBT oligomer having an IV of between 0.13 and 0.17 dL/g and a CEG of between 90 and 180 mmol/kg; and further step of the PBT oligomer polycondensation; wherein the polycondensation process is carried out continuously using a melt tank for melting oligomers, one or more reactors for post-condensation processing, and one or more finishing reactors to increase molecular weight. The resulting PBT has an intrinsic viscosity (IV) of between 0.5 and 1.3 dl/g and a carboxylic end group (CEG) concentration of between 1 and 75 mmol/kg.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: August 13, 2019
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Husnu Alp Alidedeoglu, Prashant Kumar, Osit Karroonnirun, Mark Erik Nelson, Donald E. Owens, III
  • Process for making polybutylene terephthalate oligomers
    Patent number: 10233282
    Abstract: A process for making oligomers of polybutylene terephthalate (PBT) with desirable intrinsic viscosity and carboxylic end group concentrations includes combining 1.4-butane diol (BDO). terephthalic acid and a catalyst to from a mixture and heating the mixture until the clearing point is reached based on visual inspection. The PBT oligomers are used in a continuous process for making polybutylene terephthalate (PBT) resin.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: March 19, 2019
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Husnu Alp Alidedeoglu, Prashant Kumar, Osit Karroonnirun, Mark Nelson
  • PROCESS FOR MAKING POLYBUTYLENE TEREPHTHALATE OLIGOMERS
    Publication number: 20180201729
    Abstract: Disclosed is a process for making oligomers of polybutylene terephthalate (PBT) with desirable intrinsic viscosity and carboxylic end group concentrations. The PBT oligomers are used in a continuous process for making polybutylene terephthalate (PBT) resin.
    Type: Application
    Filed: August 13, 2015
    Publication date: July 19, 2018
    Inventors: Husnu Alp Alidedeoglu, Prashant Kumar, Osit Karroonnirun, Mark Nelson
  • CONTINUOUS PROCESS FOR MAKING POLYBUTYLENE TEREPHTHALATE
    Publication number: 20170204219
    Abstract: The present invention is directed to a continuous process for preparing PBT from PBT oligomer.
    Type: Application
    Filed: August 4, 2015
    Publication date: July 20, 2017
    Inventors: Husnu Alp Alidedeoglu, Prashant Kumar, Osit Karroonnirun, Mark Erik Nelson, Donald E. Owens, III
  • Purification of monomer from recycle polyesters
    Patent number: 9127136
    Abstract: A method of recycling bis(hydroxyalkyl) terephthalate monomer from a composition comprising a terephthalate-containing polymer includes depolymerizing the terephthalate-containing polymer to provide the bis(hydroxyalkyl) terephthalate; and separating the bis(hydroxyalkyl) terephthalate from the composition comprising the depolymerized terephthalate-containing polymer by continuous multi-column liquid chromatography.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: September 8, 2015
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Philip Wesley Bell, Osit Karroonnirun, Shankar Kollengodu Subramanian