Patents by Inventor Eric J. Clayfield

Eric J. Clayfield 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 separating coal particles from an aqueous slurry
    Patent number: 4734206
    Abstract: The invention relates, in one embodiment, to a method for separating coal particles from an aqueous slurry in which a multiple emulsion of oil in water is added to the aqueous slurry, the mixture is agitated to form agglomerates of coal particles, and the coal particles are separated from the remaining aqueous slurry. By the use of a multiple emulsion of oil in water, the amount of coal recovered per unit weight of oil is increased.
    Type: Grant
    Filed: June 25, 1986
    Date of Patent: March 29, 1988
    Assignee: Shell Oil Company
    Inventors: Eric J. Clayfield, Peter Sant
  • Process for the removal of oil from an oil-in-water dispersion
    Patent number: 4524000
    Abstract: In a process for the separation of oil from an oil-in-water dispersion by coalescence followed by separation of coalesced drops, coalescence is carried out at the surface of a solid material manufactured by contacting a solid material having active H atoms in surface groups or a polyolefin in the presence of water with a compound Si(R.sup.1)(R.sup.2)(R.sup.3)(R.sup.4), in which R.sup.1 is a (cyclo)aliphatic group containing one or more amino groups, R.sup.2 a hydrolyzable group and R.sup.3 and R.sup.4 a hydrolyzable or non-hydrolyzable organic group or a hydrolyzable atom.
    Type: Grant
    Filed: February 14, 1984
    Date of Patent: June 18, 1985
    Assignee: Shell Oil Company
    Inventors: Eric J. Clayfield, Arnold G. Dixon, Richard J. L. Miller
  • Agglomeration of coal fines
    Patent number: 4153419
    Abstract: Process for the agglomeration of coal fines characterized by the staged addition of an aqueous emulsion of an oil fraction to an aqueous slurry of the fines.
    Type: Grant
    Filed: November 28, 1977
    Date of Patent: May 8, 1979
    Assignee: Shell Oil Company
    Inventors: Eric J. Clayfield, Clive Pinnington, Michael J. Cannon, Peter Sant
  • Colloil product and method
    Patent number: 4090853
    Abstract: A novel coal and liquid hydrocarbon fuel product, and a method for making the product, are disclosed.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: May 23, 1978
    Assignee: Shell Oil Company
    Inventors: Eric J. Clayfield, Ernest C. Lumb, Kenneth J. Wilbraham