Patents by Inventor Andrew Wiersum

Andrew Wiersum 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).

  • Patent number: 11873263
    Abstract: The present invention concerns a process for oligomerizing an olefin feedstock to form an oligomerization product, and a method of controlling such an oligomerization process. The process comprises oligomerizing propylene to form a Cn olefin, including contacting a feed stream comprising propylene and a recycle fraction with a solid phosphoric acid oligomerization catalyst under effective oligomerization conditions in an oligomerization reactor to produce an oligomerization effluent; and fractionating the oligomerization effluent to obtain a product fraction and the recycle fraction, the product fraction comprising the Cn olefin and the recycle fraction comprising a Cn-3 olefin; wherein the recycle fraction comprises at least 80 wt % of the Cn-3 olefin, based on the weight of the recycle fraction; and wherein n is 9, or 12.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: January 16, 2024
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Andrew Wiersum, Paul Hamilton, Luc Martens, Sara Garcia Frutos, Marcel Janssen
  • Patent number: 11512035
    Abstract: The present disclosure provides a method for forming oxygenates from olefins which includes hydroformylation of aldehydes as a formyl source alternative to syngas. In at least one embodiment, a hydroformylation process is performed at low-temperature and at or near ambient pressure for the conversion of olefins into aldehydes, thus reducing the formation of by-products such as via double bond or skeletal isomerization of the feedstock; or via further conversion of the formed aldehydes and alcohols. In at least one embodiment, the use of gaseous olefinic products (e.g., ethylene) instead of strained olefins (e.g., norbornene) improves the control equilibria in transfer hydroformylation reactions.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: November 29, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Alex Carpenter, Andrew Wiersum, Luc Martens
  • Publication number: 20220234967
    Abstract: The present invention concerns a process for oligomerizing an olefin feedstock to form an oligomerization product, and a method of controlling such an oligomerization process. The process comprises oligomerizing propylene to form a Cn olefin, including contacting a feed stream comprising propylene and a recycle fraction with a solid phosphoric acid oligomerization catalyst under effective oligomerization conditions in an oligomerization reactor to produce an oligomerization effluent; and fractionating the oligomerization effluent to obtain a product fraction and the recycle fraction, the product fraction comprising the Cn olefin and the recycle fraction comprising a Cn-3 olefin; wherein the recycle fraction comprises at least 80 wt % of the Cn-3 olefin, based on the weight of the recycle fraction; and wherein n is 9, or 12.
    Type: Application
    Filed: March 10, 2020
    Publication date: July 28, 2022
    Inventors: Andrew Wiersum, Paul Hamilton, Luc Martens, Sara Garcla Frutos, Marcel Janssen
  • Publication number: 20220041537
    Abstract: The present disclosure provides a method for forming oxygenates from olefins which includes hydroformylation of aldehydes as a formyl source alternative to syngas. In at least one embodiment, a hydroformylation process is performed at low-temperature and at or near ambient pressure for the conversion of olefins into aldehydes, thus reducing the formation of by-products such as via double bond or skeletal isomerization of the feedstock; or via further conversion of the formed aldehydes and alcohols. In at least one embodiment, the use of gaseous olefinic products (e.g., ethylene) instead of strained olefins (e.g., norbornene) improves the control equilibria in transfer hydroformylation reactions.
    Type: Application
    Filed: August 20, 2019
    Publication date: February 10, 2022
    Inventors: Alex Carpenter, Andrew Wiersum, Luc Martens