Patents by Inventor Dirk Litters

Dirk Litters 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 starting up a separating process for purifying removal of acrylic acid crystals from a suspension S of crystals thereof in mother liquor
    Patent number: 8461383
    Abstract: A process for starting up a separating process for purifying removal of acrylic acid crystals from a suspension S of crystals thereof in mother liquor with a hydraulic wash column which has a crystal melt circuit including crystal melt space, and a process space and a distributor space which are separated by an end with passages connecting the two spaces, in which the crystal bed is formed for the first time by first filling the crystal melt circuit and, at least partly, the process space with an acrylic acid-comprising startup liquid whose acrylic acid crystal formation temperature is less than or equal to the temperature of the suspension S increased by 15° C.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: June 11, 2013
    Assignee: BASF SE
    Inventors: Joerg Heilek, Dirk Litters, Klaus Joachim Mueller-Engel
  • PROCESS FOR STARTING UP A SEPARATING PROCESS FOR PURIFYING REMOVAL OF ACRYLIC ACID CRYSTALS FROM A SUSPENSION S OF CRYSTALS THEREOF IN MOTHER LIQUOR
    Publication number: 20110124834
    Abstract: A process for starting up a separating process for purifying removal of acrylic acid crystals from a suspension S of crystals thereof in mother liquor with a hydraulic wash column which has a crystal melt circuit including crystal melt space, and a process space and a distributor space which are separated by an end with passages connecting the two spaces, in which the crystal bed is formed for the first time by first filling the crystal melt circuit and, at least partly, the process space with an acrylic acid-comprising startup liquid whose acrylic acid crystal formation temperature is less than or equal to the temperature of the suspension S increased by 15° C.
    Type: Application
    Filed: October 4, 2010
    Publication date: May 26, 2011
    Applicant: BASF SE
    Inventors: Jörg HEILEK, Dirk Litters, Klaus Joachim Müller-Engel