Patents by Inventor Jacek Hetper

Jacek Hetper 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).

  • Method to treat an ion-exchanger catalyst for the process of bisphenol-A synthesis
    Patent number: 5502016
    Abstract: In the process of bisphenol-A systhesis a method for controlling the water content of the resultant cation-exchanger bed wherein an acid ion-exchanger resin in the form of a sulphonated styrene-divinylbenzene copolymer is washed with phenol and the resulted washing is contacted with a basic ion-exchanger resin. Water is removed from the washing by distillation, and the dewatered phenol is recycled to wash the cation-exchanger bed. The catalyst bed is then washed with a mixture of phenol acetone and water, and this washing is contacted with the basic ion-exchange resin and recycled to wash the cation exchanger bed so as to obtain the desired moisture content.
    Type: Grant
    Filed: May 23, 1994
    Date of Patent: March 26, 1996
    Assignees: Instytut Ciezkiej Syntezy Organicznej Blachownia, Zaklady Chemiczne Blachownia
    Inventors: Maciej Kiedik, Andrzej Krueger, Jo/ zef Ko t, Antoni Korek, Wojciech Balcerowiak, Jacek Hetper, Maria Majchrzak, Jan Niedziela, Ryszard Kosciuk, Anna Rzodeczko, Jerzy Mro/ z, Zbigniew Swiderski