Patents by Inventor Valerie Wiss-Henrard

Valerie Wiss-Henrard 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).

  • Process for the separation of isoalkanes/n-alkanes by gas phase adsorption using a pressure swing and four adsorbers
    Patent number: 5863315
    Abstract: Four adsorbers 1 to 4, each operating in a cycle comprising (described for adsorber 2): an adsorption step 1 wherein a feed from adsorber 2 is circulated to adsorber 2; an adsorption step 2 wherein feed is injected to the bottom of adsorber 2 and a product rich in isoparaffins is recovered from the head of adsorber 2; an adsorption step 3 wherein a portion of the fluid leaving adsorber 2 is sent to adsorber 3; an adsorption step 4 wherein the head of adsorber 2 receiving the feed is connected to the bottom of adsorber 3; a first depressurisation step 5 wherein adsorber 2 at high pressure is connected to adsorber 4 at a lower pressure; a second depressurisation step 6 wherein the head of adsorber 2 is closed; a stripping step 7 wherein the bottom of adsorber 2, which receives desorbent overhead, is connected to the top of adsorber 2; two principal stripping steps 8 and 9 wherein adsorber 2 alone is supplied with desorbent; a stripping finishing step 10 wherein adsorber 2 is continued to be supplied with desorb
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: January 26, 1999
    Assignee: Institut Francais du Petrole
    Inventors: Sophie Jullian, Jean-Louis Ambrosino, Alain Chansolme, Valerie Wiss-Henrard