Patents by Inventor Carlos B. Rosas

Carlos B. Rosas 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 preparation of monochloroacetone
    Patent number: 4439623
    Abstract: There is disclosed an improved process for the preparation of monochloroacetone by reacting acetone and chlorine in a vapor-liquid phase reactor and passing the reactor effluent through a fractionator to remove the liquid phase consisting mainly of monochloroacetone (MCA). The fractionator vapor phase effluent is consisting of acetone, hydrogen chloride, some monochloroacetone, and some reaction by-products sequentially fractionated in a series of condensers of varying temperatures such that the hydrogen chloride is isolated free of impurities and the remaining reaction materials, consisting mainly of acetone with some dissolved hydrogen chloride are available for recycling back into the reactor. The hydrogen chloride, isolated in the vapor phase, may be quenched with water to produce concentrated aqueous hydrochloric acid which may be used in other chemical procedures or it may be compressed into anhydrous hydrogen chloride.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: March 27, 1984
    Assignee: Merck & Co., Inc.
    Inventors: Kenneth H. Krieger, Lawrence J. Naldi, Carlos B. Rosas, Vijay Samant
  • Catalyst for the preparation of 4-cyanothiazole and process for preparing the catalyst
    Patent number: 4363751
    Abstract: An improved process for the preparation of 4-cyanothiazole from 4-methylthiazole using an ammoxidation catalyst composed of manganese, chromium and molybdenum is disclosed.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: December 14, 1982
    Assignee: Merck & Co., Inc.
    Inventors: Stuart Bacher, Carlos B. Rosas, John J. Sharkey