Patents by Inventor Stefan Robert Deibel

Stefan Robert Deibel 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 purifying wastewaters from the workup of crude aromatic nitro compounds
    Patent number: 8697921
    Abstract: The invention relates to a process for purifying crude aromatic nitro compounds which originate from the nitration of aromatic compounds, comprising the single or multiple performance of the following wash stage (a): (a) contacting the crude aromatic nitro compound (N-in) with an aqueous phase (W-res) and then separating the phases to obtain an organic phase (N-res) and an aqueous phase (W-res), wherein at least one demulsifier (D) is present in one or more of the wash stages (a).
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: April 15, 2014
    Assignee: BASF SE
    Inventors: Petra Deckert, Leo Denissen, Bart Van De Voorde, Julia Leschinski, Stefan Robert Deibel, Matthias Fankhaenel, Samuel Neto
  • PROCESS FOR PURIFYING WASTEWATERS FROM THE WORKUP OF CRUDE AROMATIC NITRO COMPOUNDS
    Publication number: 20130041189
    Abstract: The invention relates to a process for purifying crude aromatic nitro compounds which originate from the nitration of aromatic compounds, comprising the single or multiple performance of the following wash stage (a): (a) contacting the crude aromatic nitro compound (N-in) with an aqueous phase (W-res) and then separating the phases to obtain an organic phase (N-res) and an aqueous phase (W-res), wherein at least one demulsifier (D) is present in one or more of the wash stages (a).
    Type: Application
    Filed: August 8, 2012
    Publication date: February 14, 2013
    Applicant: BASF SE
    Inventors: Petra DECKERT, Leo Denissen, Bart Van De Voorde, Julia Leschinski, Stefan Robert Deibel, Matthias Fankhänel, Samuel Neto
  • PROCESS FOR PURIFYING WASTEWATERS FROM THE WORKUP OF CRUDE AROMATIC NITRO COMPOUNDS
    Publication number: 20130041188
    Abstract: The invention relates to a process for purifying crude aromatic nitro compounds which originate from the nitration of aromatic compounds, comprising the following wash stages (a1) and (a2), where each of stages (a1) and (a2) may be performed once or more than once in succession: (a1) contacting the crude aromatic nitro compound (N1-in) with a first aqueous phase (W1-in) comprising at least one base (B) and then separating the phases to obtain an organic phase (N1-res)and an aqueous phase (W1-res); and then (a2) contacting the organic phase (N1-res) obtained in stage (a1) with a second aqueous phase (W2-in) and then separating the phases to obtain a purified organic phase (N2-res) and at least one aqueous phase (W2-res), the aqueous phase used (W2-in) having a pH of 6 to 9.
    Type: Application
    Filed: August 6, 2012
    Publication date: February 14, 2013
    Applicant: BASF SE
    Inventors: Julia Leschinski, Petra Deckert, Leo Denissen, Bart Van De Voorde, Stefan Robert Deibel, Matthias Fankhänel, Samuel Neto