Patents by Inventor Samuel L. Smolik

Samuel L. Smolik 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 producing methylene dianiline
    Patent number: 4130588
    Abstract: A process for producing polyamines such as methylene dianiline wherein an aromatic amine such as aniline is reacted with formaldehyde in the presence of an acid catalyst sufficient water is employed to cause a separation into an aqueous phase and an organic phase and the methylene dianiline is extracted with a solvent said process is improved by employing as the solvent a mixture of aniline and either a water immiscible organic solvent such as orthodichlorobenzene or conducting the extraction in the presence of a water soluble inorganic salt such as zinc nitrate or a combination thereof.
    Type: Grant
    Filed: February 2, 1977
    Date of Patent: December 19, 1978
    Assignee: The Dow Chemical Company
    Inventors: Alton E. Martin, Warren D. White, Samuel L. Smolik