Patents by Inventor Earl G. Adams

Earl G. Adams 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).

  • Stabilized N-nitrosohydroxylamines
    Patent number: 6018078
    Abstract: N-nitrosohydroxylamine compounds exhibiting minimal or no degradation are disclosed. The N-nitrosohydroxylamines can be stabilized in the presence of a compound capable of removing water from the environment.
    Type: Grant
    Filed: June 23, 1999
    Date of Patent: January 25, 2000
    Assignee: First Chemical Corporation
    Inventors: Darrell V. Harris, Paul J. Roman, Jr., Zhihong Wu, Earl G. Adams, Eric L. Williams
  • Selective recovery of a nitrophenolic by-product from nitration waste water by precipitation
    Patent number: 4986920
    Abstract: A process of selectively recovering a nitrophenolic by-product, namely 2,4-dinitrophenol and picric acid, from nitration waste water in substantially pure form through the control of the solution pH of the nitration waste water and subsequent precipitation is provided. By adjusting the solution pH of the nitration waste water with an acid to a pH in the range of from about 4.0 to 0.5, the solubility of the selected nitrophenolic by-products is affected and the crystal formation of the individual by-products controlled.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: January 22, 1991
    Assignee: First Chemical Corporation
    Inventors: Earl G. Adams, Arthur C. Bayer, Alan D. Farmer, Brenda J. Hook
  • Selective recovery of a nitrophenolic by-product from nitration waste water by extraction
    Patent number: 4986917
    Abstract: A process for selectively recovering a nitrophenolic by-product from nitration waste water in substantially pure form by solvent extraction is provided. The pH of the waste water is adjusted using an acid to affect the solubility of a particular nitrophenolic by-product in the waste water so that the by-product is selectively separable from the other components of the nitration waste water by solvent extraction.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: January 22, 1991
    Assignee: First Chemical Corporation
    Inventors: Earl G. Adams, Arthur C. Bayer, Alan D. Farmer, Brenda J. Hook
  • Process for extracting and disposing of nitrophenolic by-products
    Patent number: 4925565
    Abstract: A process for treating nitrophenolic by-products contained in nitration waste water including the steps of solvent extraction, solvent and nitrophenolic residue recovery by distillation, and incineration of the nitrophenolic residue is disclosed. The extraction process involves the extraction of the nitrophenolic by-products from the nitration waste water utilizing a solvent in the presence of an acid at an elevated temperature and acidic pH. The extraction produces a nitrophenolic solvent solution which is subjected to a distillation to recover the solvent for reuse and produce a residue containing the nitrophenolic materials. The residue can be disposed of by incineration.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: May 15, 1990
    Assignee: First Chemical Corporation
    Inventors: Earl G. Adams, Robert B. Barker
  • Co-production of an aromatic monoamine and an aromatic diamine directly from benzene or a benzene derivative through controlled nitration
    Patent number: 4740621
    Abstract: A two-stage process for the co-production of aniline and m-phenylenediamine where, in the first stage, benzene, nitric acid, and sulfuric acid are reacted in a liquid phase to produce in greater amounts nitrobenzene (approximately 70%) and m-dinitrobenzene (approximately 30%), and in lesser or trace amounts o-dinitrobenzene and p-dinitrobenzene, and water; and in the second stage the products of the first stage are reacted with hydrogen in the gas phase to produce aniline (approximately 70%) and m-phenylenediamine (approximately 30%) in greater amounts, and o-phenylenediamine and p-phenylenediamine in lesser amounts, and water. The reaction products are separated by distillation.
    Type: Grant
    Filed: November 1, 1985
    Date of Patent: April 26, 1988
    Assignee: First Chemical Corporation
    Inventors: Earl G. Adams, Robert B. Barker, Mark J. Lossett, Larry I. Flowers