Patents by Inventor Ralf Gunnar MEISTER

Ralf Gunnar MEISTER 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).

  • Hazy-free at 0° C heavy base oil and a process for producing
    Patent number: 11680214
    Abstract: A process for producing a base oil composition from a deasphalted oil (DAO) feed, where the DAO feed undergoes hydrotreating, hydrocracking, catalytically dewaxing, hydrofinishing, and fractionating to generate the base oil composition. The base oil composition includes a hazy-free at 0° C. heavy base oil comprising (a) a kinetic viscosity ranging from 15 to 21 cSt at 100° C., (b) a 5 viscosity index of at least 95, (c) a pour point of less than ?12° C., (d) a cloud point of less than ?18° C., and (e) a total aromatics content of 2 wt % or less, where the hazy-free at 0° C. heavy base oil maintains a hazy-free appearance when stored undisturbed at 0° C. during a test period.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: June 20, 2023
    Assignee: SHELL USA, INC.
    Inventors: Nariman Boumendjel, Ralf Gunnar Meister, Cornelis Hyacinthus Maria Van Der Hulst, Nicolaas Van Dijk
  • HAZY-FREE AT 0°C HEAVY BASE OIL AND A PROCESS FOR PRODUCING
    Publication number: 20220025278
    Abstract: A process for producing a base oil composition from a deasphalted oil (DAO) feed, where the DAO feed undergoes hydrotreating, hydrocracking, catalytically dewaxing, hydrofinishing, and fractionating to generate the base oil composition. The base oil composition includes a hazy-free at 0° C. heavy base oil comprising (a) a kinetic viscosity ranging from 15 to 21 cSt at 100° C., (b) a 5 viscosity index of at least 95, (c) a pour point of less than ?12° C., (d) a cloud point of less than ?18° C., and (e) a total aromatics content of 2 wt % or less, where the hazy-free at 0° C. heavy base oil maintains a hazy-free appearance when stored undisturbed at 0° C. during a test period.
    Type: Application
    Filed: August 28, 2019
    Publication date: January 27, 2022
    Inventors: Nariman BOUMENDJEL, Ralf Gunnar MEISTER, Cornelis Hyacinthus Maria VAN DER HULST, Nicolaas VAN DIJK
  • Haze-free base oils with high paraffinic content
    Patent number: 11078430
    Abstract: The present invention relates to a method for reducing the cloud point of a base oil with high saturates/paraffinic content to below 0° C., wherein the method comprises subjecting said base oils to a cloud point reduction step comprising adding said base oil to a solvent mixture, wherein the solvent mixture comprises a paraffin naphtha fraction and a co-solvent to obtain a solvent treatment mixture; and subjecting the solvent treatment mixture to a solvent de-waxing step.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: August 3, 2021
    Assignee: SHELL OIL COMPANY
    Inventors: Eglantine Armelle Christiane Colette Marie Albe, Godfried Johannes Aarts, José Luís Moniz Jardim, Cornelis Hyacinthus Maria Van Der Hulst, Ralf Gunnar Meister
  • HAZE-FREE BASE OILS WITH HIGH PARAFFINIC CONTENT
    Publication number: 20200087581
    Abstract: The present invention relates to a method for reducing the cloud point of a base oil with high saturates/paraffinic content to below 0° C., wherein the method comprises subjecting said base oils to a cloud point reduction step comprising adding said base oil to a solvent mixture, wherein the solvent mixture comprises a paraffin naphtha fraction and a co-solvent to obtain a solvent treatment mixture; and subjecting the solvent treatment mixture to a solvent de-waxing step.
    Type: Application
    Filed: December 21, 2017
    Publication date: March 19, 2020
    Inventors: Eglantine Armelle Christiane Colette Marie ALBE, Godfried Johannes AARTS, José Luís MONIZ JARDIM, Cornelis Hyacinthus Maria VAN DER HULST, Ralf Gunnar MEISTER