Patents by Inventor Don C. Shell

Don C. Shell 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).

  • Organophosphorous antifoulants in hydrodesulfurization
    Patent number: 4024048
    Abstract: Phosphate and phosphite mono- and di-esters and thioesters in small amounts function as antifoulant additives in overhead vacuum distilled gas oils employed as feedstocks in hydrodesulfurizing wherein such feedstocks are subjected to elevated temperatures of from about 200.degree. to 700.degree. F and which are prone under such processing to produce material that deposits and accumulates upon the surfaces of hydrodesulfurization catalysts and also equipment, such as heat transfer surfaces and the like. Such additives not only inhibit and suppress fouling but also reduce fouling in previously fouled such systems.
    Type: Grant
    Filed: November 20, 1975
    Date of Patent: May 17, 1977
    Assignee: Nalco Chemical Company
    Inventors: Don C. Shell, Edward C. Hayward
  • Mono and di organophosphite esters as crude oil antifoulants
    Patent number: 4024049
    Abstract: Thio-phosphate and -phosphite mono- and di-esters in small amounts function as antifoulant additives in crude oil systems employed as feedstocks in petroleum refining which are subjected to elevated temperatures of from about 100.degree. to 1500.degree. F and which are prone to produce material that deposits and accumulates upon the surfaces of petroleum processing equipment, such as heat transfer equipment and the like. Such additives not only inhibit and suppress fouling but also reduce fouling in previously fouled refining systems.
    Type: Grant
    Filed: November 20, 1975
    Date of Patent: May 17, 1977
    Assignee: Nalco Chemical Company
    Inventors: Don C. Shell, Edward C. Hayward
  • Using an antifoulant in a crude oil heating process
    Patent number: 4024051
    Abstract: Inorganic phosphorus-containing acids and salts thereof in small amounts function as antifoulant additives in crude oil systems employed as feedstocks in petroleum refining which are subjected to elevated temperatures of from about 100.degree. to 1500.degree. F. and which are prone to produce fouling material that deposits and accumulates upon the surfaces of petroleum processing equipment, such as heat transfer equipment and the like. Such additives not only inhibit and suppress fouling but also reduce fouling in previously fouled refining systems.
    Type: Grant
    Filed: November 20, 1975
    Date of Patent: May 17, 1977
    Assignee: Nalco Chemical Company
    Inventors: Don C. Shell, Edward C. Hayward
  • Phosphorous ester antifoulants in crude oil refining
    Patent number: 4024050
    Abstract: Phosphate and phosphite mono- and di-esters in small amounts function as antifoulant additives in crude oil systems employed as feedstocks in petroleum refining which are subjected to elevated temperatures of from about 100.degree. to 1500.degree. F. and which are prone to produce material that deposits and accumulates upon the surfaces of petroleum processing equipment, such as heat transfer equipment and the like. Such additives not only inhibit and suppress fouling but also reduce fouling in previously fouled refining systems.
    Type: Grant
    Filed: October 23, 1975
    Date of Patent: May 17, 1977
    Assignee: Nalco Chemical Company
    Inventors: Don C. Shell, Edward C. Hayward