Patents by Inventor Peter Verelst

Peter Verelst 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 FOR PRODUCING THE TRISODIUM SALT OF 2,4,6-TRIMERCAPTO-S-TRIAZINE
    Publication number: 20110098470
    Abstract: The invention relates to a method for producing the trisodium salt of 2,4,6-trimercapto-s-triazine, cyanuric chloride being reacted in an aqueous medium at a temperature of 20 to 70° C. using NaSH, Na2S or a mixture of the two compounds at a pH value of 7 to 11, and subsequently the trisodium salt of 2,4,6-trimercapto-s-triazine being precipitated and cleaved at a pH value of 0.12 and a temperature of 0 to 20° C., characterized in that after the cleavage step of the trisodium salt of 2,4,6-trimercapto-s-triazine the mother liquor is adjusted to a pH value of 6 to 8, wherein the monosodium salt of 2,4,6-trimercapto-s-triazine is precipitated.
    Type: Application
    Filed: April 22, 2009
    Publication date: April 28, 2011
    Applicant: EVONIK DEGUSSA GMBH
    Inventors: Joerg Grimmer, Ruediger Peldszus, Peter Verelst, Roger Vandervee